do an dung plc dieu khien den giao thong

7/31/2019 Do an Dung Plc Dieu Khien Den Giao Thong

1/95

truong cao dang nghe bac giang thuyt minhKhoa in - in t

n tt nghip

Li ni u

Hin nay s tin b khoa hc k thut trn th gii din ra

nhanh chng, vi s ra i ca hng lot nhng sn phm mi ng

dng nhng tin b nhng nc pht trin.c bit trong nhng

nm gn y k thut iu khin pht trin mnh m, c nhiug

cng ngh iu khin mi c ra i thay th cho nhng

cng ngh li thi.

bt kp vi tin b khoa hc k thut trn th gii cng nh

p ng yu cu CNH_HH t nc th ngnh cng nghip Vit

Nam ang thay i nhanh chng, cng ngh v thit b hin

i ang dn dn c thay th cc cng ngh lc hu v thit b

c. Cc thit b cng ngh tin tin vi h thng iu khin lp

trnh PLC, Vi x l, in kh nn, in t. ang c ng dngrng ri trong cng nghip nh cc dy truyn xn xut nc ngt,

ch bin thc n gia xc, my iu khin theo chng trnh CNC,

cc h thng n giao thng, cc h thng bo ng. Trong cc

trng i hc, cao ng v cc trng trung hc v ang a

cc thit b hin i c kh nng lp trnh c vo ging dy.

Mt trong nhng loi thit b c ng dng mnh m v m bo

c tin cy cao l h thng iu khin t ng PLC.

Vi ti Thit k m hnh h thng iu khin

n giao thng ti ng t . Chng em vn dng c nhng -u im ca h thng iu khin ny c hiu qu cao. iu c

bit l tng ny c ng dng trong thc t rt nhiu. Bi v

hin trng giao thng Vit Nam cn rt th s, lc hu, ngi tham

GVHD: nguyen dinh khanh SV:giap van thuy

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2/95


n tt nghip

gia giao thng khng i theo ng nguyn tc no mi n n

tc ng, tai nn..

Sau qu trnh hc tp rn luyn v nghin cu ti trng chng

em tch lu c vn kin thc thc hin ti ca

mnh. Cng vi s hng dn tn tnh ca thy gio nguyen dinh

khanh, cng nh cc thy c gio trong khoa v cc bn sinh vin

cng kho n nay chng em hon thnh ti ny vi ni

dung sau:

1: Xc nh nhim v iu khin h thng.

2: Gii thiu chung v PLC.3: Thit k ch to m hnh m phng.

4: Vit chng trnh chy cho h thng qua phn mm ng

dng.

5: Hon thnh thuyt minh.

Do thi gian nghin cu c hn nn khng th trnh khi nhng

sai st, chng em rt mong nhn oc s gp , ch dn thm

ca cc thy c cng nh kin ng gp ca cc bn sinh vin

ti ca chng em hon thin hn, p ng y

nhng mc tiu t ra.

Chng em xin chn thnh cm n!

bac giang, ngy 11 thng 6

nm 2010


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3/95


n tt nghip

Nhn xt ca gio vin hng dn 1

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...................................................................................................GVHD: nguyen dinh khanh SV:giap van thuy

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4/95


n tt nghip

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Nhn xt ca gio vin hng dn 2.....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

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...................................................................................................GVHD: nguyen dinh khanh SV:giap van thuy

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5/95


n tt nghip

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...................................................................................................DAN NHAP

I.at van e

T ong ngay cang ong vai tro quan trong trong i

song va cong nghiep. Ngay nay nganh t ong a phat

trien ti trnh o cao nh nhng tien bo cua ly thuyetieu khien t ong, cua nhng nganh khac nh ien t,

tin hoc, Nhieu he thong ieu khien a ra i, nhng

phat trien manh va co kha nang phuc vu rong la bo

ieu khien PLC. S d nh the, do bo PLC co nhieu u

iem noi bac so nhng bo ieu khien khac :

n gian, de dang thay oi, lap trnh .


5


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n tt nghip

Tin cay trong moi trng cong nghiep.

Canh tranh c gia thanh vi cac bo dieu khien

khac.Cuoi thap nien 60 xuat hien khai niem ve PLC va a

c phat trien rat nhanh. Nam 1974 PLC a s dung

nhieu bo x ly nh : mach nh thi, bo em, dung lng

nh en 12KB va co 1024 iem nhap xuat. Nam 1976

a gii thieu he thong a tn hieu vao ra t xa. Nam

1977 PLC a dung en vi x ly. Nam1980 phat trien cac

khoi nhap xuat thong minh nang cao ieu khien thuanli qua vien thong, nang cao viec phat trien phan mem,

dung may tnh ca nhan lap trnh. en nam 1985 a

thanh lap mang PLC.

Rieng nc ta sap ti ay hanh rao thue quan khu

vc c loai bo, kinh te m ca hp tac vi nc

ngoai. Trc tnh hnh o, nen cong nghiep se gap

khong t kho khan do con nhieu day chuyen co cong

nghe lac hau. e co cho ng va the manh tren

thng trng, nha nc a ac biet chu trong en ng

dung va phat trien t ong trong san xuat, nham nang

cao nang suat, chat lng san pham va ha gia thanh.

Mot trong nhng phng an tot nhat va c s dung

rong hien nay la thay the nhng he thong o bang boieu khien PLC. e phat trien manh hn na, nhiem vu

at ra hang au la ao tao nhng chuyen gia ve t

ong ieu khien noi chung va ve PLC noi rieng.

La mot ky s ien cong nghiep, cong viec se gan

lien vi ieu khien, van hanh he thong san xuat. Nh

vay, nhng hieu biet ve PLC se tao nhieu thuan li e


6


7/95


n tt nghip

lam viec tot hn. Khi ang con ngoi tren ghe nha

trng, viec tm hieu, nghien cu e nam vng phng

phap lap trnh tren bo PLC rat co y ngha va la ieu

kien tot nhat hoc hoi, tch luy kinh nghiem.

II. Gii han e tai

-Do thi gian nghin cu c hn nn vic tm hiu v PLC v

SIMATIC S7-300 ca SIEMENS cn nhiu thiu st v khng y

.

-Do hon cnh hc tp khng c tip xc nhiu vi PLC nn

trng qua trnh kho st v thc hnh vi PLC cn c nhiu khkhn.

-Do yu cu ca ti xut pht t thc t nn trong khi x l

cc trng hp trong thc t cn c nhiu trng hp khng x l -

c.


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n tt nghip

Phu lc

Trang

Li ni u

1

Chng I: khi nim v h thng iu khin

8

I. Khi nim v h thng iu khin.

8

II.Phn loi.8

III. S khc nhau gia cc phng php iu khin

11

VI. B iu khin lp trnh c

12


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Chng II: Gii thiu v PLC s7-300

13

I. i cng v thit b iu khin logic lp trnh PLC.

13

II. H thng iu khin PLC S7 - 300.

18

III. Cu trc b nh ca CPU ca PLC S7 - 300.

25

Chng III k thut lp trnh PLC s7 300

32I.Gii thiu chung

32

II. Ngn ng lp trnh PLC

33

III. Lp trnh v chn ch lm vic cho PLC S7-300.

39

IV. Cc khi, hm v chc nng ca n trong PLC.

41

V. B thi gian

51

VI. B m

57

Chng IV kt ni mng trong PLC61

1. Gii thiu.

61

2. Khai bo mng MPI

61


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n tt nghip

3. Mng vo ra phn tn

62

Chng V thit k v ch to m hnh

64

I. Kho st h thng iu khin h thng n giao thng

ti ng t 64

II. Mch in iu khin tng trng thi ca h thng n.

68

III. Mch iu khin bng PLC

74Chng VI ng dng ca PLC

79

Chng i: khi qut chung v h thng iu khin

Khi nim v phn loi v h thng iu khin.

I. Khi nim v iu khin.

iu khin l mt qu trnh ca mt h thng trong di tc

ng ca hay nhiu i lng gi l cc i lng vo, nhng i l-

ng khc gi l i lng ra c thay i theo mt quy lut nht

nh ca h thng .

II. Phn loi.

Hin nay ngi ta chia cng ngh iu khin ra lm hai loichnh l:

* Phng php iu khin ni cng ( iu khin lp tuyn).

* Phng php iu khin lp trnh c.

II.1. Phng php iu khin ni cng ( iu khin lp

tuyn).


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11/95


n tt nghip

Khi nim: Phng php iu khin ni cng l h thng c

thc hin bi cc phn t t ng ni vi nhau bng cc ng

dy.

Trong iu khin ni cng ngi ta chia lm hai loi: iu

khin ni cng tip im v iu khin ni cng khng tip

im.

a. Ph ng php iu khin ni cng c tip im : Dng cc

kh c in t nh rle, cng tc t vi cc b cm bin, cc n ,

cc cng tc, cc kh c ny c ni li vi nhau theo mt mch

in c th thc hin mt yu cu cng ngh nht nh nhmch i chiu quay, mch khi ng gii hn dng hay mch

iu khin ng c chy tun t v dng tun t.

S cu trc h thng iu khin ni cng c tip

im.

b. Ph ng php iu khin ni cng khng tip im: Dng cc

cng logic c bn a nng hay cc mch tun t ( Gi chung l IC

s ) kt hp vi cc b cm bin, cc n, cng tc - Cc IC s ny

cng c ni li vi nhau theo mt s logic c th thchin mt yu cu cng ngh nht nh. Cc mch iu khin ni

cng s sng cc linh kin in t cng sut, quang tr, triac,

tranzitor thay th cng tc trong cc mch ng lc.


11

Cc phnt u vo

Cc phnt iukhin

Cc phnt u ra

Cc tin hiuu vo

Cc phniukhin


12/95


n tt nghip

Cu trc h thng iu khin ni cng khng tip im.

Trong h thng iu khin ni cng, cc linh kin hay kh c

in c ni vnh vin vi nhau. Do khi mun thay i li

nhim v iu khin th phi ni dy li ton b mch in. Vi

cc mch phc tp th khng hiu qu v rt tn km.

Phng php diu khin ni cng c thc hin theo cc bc

sau.

II.2.H thng iu khin lp trnh c (PLC)

Trong h thng iu khin lp trnh c cu trc ca b

iu khin v cch ni dy c lp vi chng trnh. ChngGVHD: nguyen dinh khanh SV:giap van thuy

Xc nh yu cu cngngh

Thit k s iukhin

Chn phn t mchin

Rp ni mch, lin kt cc phnt

Lu vo b nh, In thnh tiliu

Chy thkim tra

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trnh c nh ngha hot ng iu khin c ghi trc tip

vo b nh ca b iu khin nh s tr gip ca b lp trnh hay

my vi tnh. thay i chng trnh iu khin ch cn thay

i ni dung b nh ca b iu khin, phn ni dy bn ngoi

khng b nh hng. y l u im ca phng php iu khin

lp trnh c.

Cc b c thi t l p s di u khi n l p trnh:

III. S khc nhau gi a h th ng i u khi n n i c ng v

h th ng i u khi n l p trnh c c th minh ho b ng v

d sau:


Xc nh yu cu cng

ngh

Thit k thut gii

Son tho chng trnh

Np chng trnh vo b nh

Lu vo b nh, in thnh ti liu

Chy thkim tra

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- i u khi n h th ng 3 my b m n c qua 3 kh i ng t K1,

K2, K3. Trnh t i u khi n nh sau: Cc my b m ho t ng tu n

t ngh a l K1 ng tr c, ti p n l K2 r i cu i cng l K3 ng.

th c hi n nhi m v theo yu c u trn m ch i u khi n ta

c th thi t k nh sau:

Trong cc nt n S1, S2, S3, S4 l cc ph n t nh p tn

hi u.

Cc ti p i mK1, K2, K3 v cc m i lin k t l cc ph n x l.

Cc kh i ng t K1, K2, K3 l k t qu x l.

S i u khi n theo ki u n i c ng:

S1

S2S3 S4

K 1K 2

K 1 K 2 K 3

K 3K 1 K 2

-N u ta thay b ng thi t b i u khi n l p trnh c c

th m t nh sau:

Tn hi u vo S1, S2, S3, S4 v n gi nguyn

Tn hi u ra K1, K2, K3 l cc kh i ng t v n gi nguyn -Ph n x l c thay th b ng thi t b i u khi n l p trnh

c.


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n tt nghip

PLCB nh

S1 S2 S3 S4

Ch-ng trnh

IV.B i u khi n l p trnh c.

Khingunnui

B nhch-ngtrnh PLC

B vi x lInput module

I1 I2 I3 I4

Outputmodule

Q1 Q2 Q3

Ch- ngtrnh

B i u khi n l p trnh c(Programble Logic Controler): g i

t t l PLC bao g m cc module sau:

-Kh i x l trung tm CPU v b nh ch ng trnh

-Module xu t nh p(Input / Output)

-H th ng Bus truy n tn hi u

-Kh i ngu n nui

-Module nh p (input module) c n i v i cc cng t c, nt n,

cc b c m bi n i u khi n ch ng trnh t bn ngoi. Cc ng

vo c k hi u theo th t I1, I2, I3

-Module xu t (output module) c n i v i t i ng ra nh

cu n dy r le, cng t c t , n tn hi u, van i n t .. GVHD: nguyen dinh khanh SV:giap van thuy

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n tt nghip

-Ch ng trnh i u khi n c n p vo b nh nh s tr gip

c a b l p trnh hay b ng m t my vi tnh.

Chng II gii thiu v PLC - s7 300

I. i cng v thit b iu khin logic lp trnh PLC.

1. Khi nim.

Thit b iu khin logic lp trnh (Programmable Logic

Control , vit tt l PLC ) l loi thit b cho php thc hin linh

hot cc thut ton iu khin s thng qua mt ngn ng lp

trnh. Thay cho vic thc hin thut ton bng mch s nh

vy vi chng trnh iu khin PLC tr thnh mt b iu khin

s nh gn d dng thay i thut ton v c bit d traoi thng tin vi mi trng xung quanh (vi cc PLC khc hay my

tnh). Ton b chng trnh iu khin c lu trong b nh ca

PLC di dng cc khi chng trnh nh khi OB, FC hoc FB, v c

thit lp theo chu k vng qut.

c th thc hin c mt chng trnh iu khin, tt

nhin PLC c tnh nng nh mt my tnh. Ngha l phi c mt b

vi x l (PLC), mt h iu hnh, b nh lu chng trnh iu

khin, d liu v tt nhin phi c cng u vo/ra giao

tip c vi i tng iu khin v trao i thng tin vi mi tr-

ng xung quanh. Bn cnh PLC cn c thm cc khi chc nng

c bit khc nh b m (Counter), b thi gian (Timer) v

cc khi chuyn dng khc.

2. Cu trc ca PLC.GVHD: nguyen dinh khanh SV:giap van thuy

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17/95


n tt nghip

Thit b iu khin logic lp trnh PLC l thit b iu khin

c bit da trn b vi x l, s dng b nh lp trnh c lu

tr cc lnh v thc hin cc chc nng: php logic, lp chui,

nh gi, m, thut ton iu khin my v cc qu trnh.

Tn hiu

Ng vo

Tn hiu

Ng ra

PLC

Ch-ng trnh

PLc c thit k cho php nhng ngi khng yu cu kin thc

cao v my tnh v ngn ng my tnh c th vn hnh c. Khi

cn iu khin mt bi ton ta ch cn vit chng trnh theo

ngn ng PLC v nhp vo b nh PLC. Thit b iu khin s

gim st cc tn hiu vo /ra theo cc chng trnh ny v thc

hin cc quy tc iu khin lp trnh.

PLC c 5 thnh phn c bn: n v x l trung tm, b nh,

b ngun nui, khi tn hiu vo/ra v thit b lp trnh.

Thit blp trnh

B nh

B x lGiaodinnhp

Giaodinxut

Nguncng xut

S cu trc c bn ca PLC


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3. Cu to PLC.

Mt PLC in hnh c cu to nh hnh v:

RAM(vngnh

ch-ngtrnh)

PLCXungnhp

Khivo /raROM

RAMvng

nh dliu

BUS a ch

BUS iu khin

Pin

Panellp

trnh

Optocuopler

Tip imu ra

Hthng BUS vo ra

Tn hiu vo Tn hiu ra K

BUS dliu

Ta thy cu trc c bn ca PLC bao gm mt b vi x l trungtm CPU, b nh (ROM, RAM), khi vo ra, khi pht xung nhp,

pin v h thng cc BUS.

Ton b hot ng ca PLC c iu khin bi CPU, n c

cung cp bi khi pht xung nhp, do tc ca CPU s ph

thuc vo khi pht xung nhp( thng thng khi pht xung nhp

c tn s vo khong 18 MHz ), xung nhp ny s cung cp cho

tt c cc khi trong PLC ng b ha qu trnh hot ng

ca khi ny vi CPU.

H thng BUS bao gm BUS a ch ( xc nh a ch trn

cc vng nh ), BUS iu khin ( truyn ti cc thng tin iu

khin ), BUS d liu ( truyn ti d liu)v cc BUS vo/ra

( mang thng tin t cc u vo ra).

C bn b nh trong PLC:GVHD: nguyen dinh khanh SV:giap van thuy

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19/95


n tt nghip

+B nh ROM: l loi b nh khng th thay i c, b nh ny

ch np c mt ln nn t c s dng ph bin nh cc loi b

nh khc.

+B nh RAM: l loi b nh c th thay i c v dng

cha cc chng trnh ng dng cng nh d liu, d liu cha

trong RAM s b mt kh mt in. Tuy nhin, iu ny c th

khc phc bng cch dung Pin.

+B nh EPROM: ging nh RAM, nhun nui cho EPROM khng

cn dung Pin, tuy nhin ni dung cha trong n c th xa bng

cch chiu tia cc tm vo mt ca s nh trn EPROM v sau np li ni dung bng my np.

+B nh EEPROM: kt hp hai u im ca RAM v EPROM, loi

ny c th xoa v np bng tn hiu in. Tuy nhin s ln np

cng c gii hn.

4. u nhc im ca h thng:

Trong giai on u ca thi k pht trin cng nghip vo

khong 1960 - 1980, yu cu t ng ca h iu khin c

thc hin bng cc Rle in t ni vi nhau bng dy dn in

trong bng iu khin, trong nhiu trng hp bng iu khin

c kch thc qu ln n ni khng th gn ton b ln trn tng

v cc dy ni cng khng hon ton tt v th rt hay xy ra

trc trc trong h thng. Mt im quan trng na l do thi

gian lm vic ca cc Rle c gii hn nn khi cn thay th phingng ton b h thng v dy ni cng phit hay mi cho ph

hp, bng iu khin ch dng c mt yu cu ring bit khng

th thay i tc thi chc nng khc m i hi th chuyn mn

c tay ngh cao. Tm li h thng iu khin Rle hon ton

khng linh hot.

*Tm tc nh c im ca h thng iu khin dng Rle:


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-Tn km rt nhiu dy dn.

-Thay th rt phc tp.

-Cn cng nhn sa cha tay ngh cao.

-Cng sut tiu th ln.

-Thi gian sa cha lu.

-Kh cp nht s nn gy kh khn cho cng tc bo tr

cng nh thay th.

*u im ca h iu khin PLC:

S ra i ca h iu khin PLC lm thay i hn h

thng iu khin cng nh cc quan nim thit k v chng, hiu khin dng PLC c nhiu u im sau:

-Gim 80% s lng dy dn.

-Cng sut tiu th ca PLC rt thp.

-C chc nng t chun on do d dng cho cng tc sa

cha c nhanh chng v d dng.

-Chc nng iu khin thy i d dng bng thit b lp

trnh ( my tnh, mn hnh )

m khng cn thay i phn cng nu khng c yu cu thm

bt cc thit b xut nhp.

-S lng Rle v Timer t hn nhiu so vi h iu khin c

in.

-S lng tip im trong chng trnh s dng khng hn ch.

-Thi gian hon thnh mt chu chnh iu khin rtnhanh( vi mS) dn n tng cao tc sn xut.

-Chi ph lp t thp.

- tin cy cao.

-Chng trnh iu khin c th in ra giy ch trong vi pht

thun tin cho vn bo tr v sa cha h thng.

5. Phn loi PLC.


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Hin nay trong lnh vc iu khin ni chung v ngnh t

ng ha ni ring, cc PLC mi c a vo s dng ngy cng

nhiu vi tnh nng rt ln nh:

+ PLC S5

+ PLC S7 - 200

+ PLC S7 - 300

+ PLC S7 - 400

+ PLC LOGO


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II. H thng iu khin PLC S7 - 300.

II.1. Cu trc phn cng ca h thng PLC S7 - 300.

Thng thng, tng tnh mm do trong ng dng thc t

m phn ln cc i tng iu khin c s tn hiu u

vo/ra cng nh chng loi tn hiu vo /ra khc nhau m cc b

iu khin PLC c thit k khng b cng ha v cu hnh.

Chng c chia nh thnh cc modul. S cc modul c s dng

nhiu hay t tu theo yu cu cng ngh, song ti thiu bao gi

cng phi c mt modul chnh l cc modul CPU, cc modul chc

nng chuyn dng nh PID, iu khin ng c. Chng c gichung l modul m rng. Tt c cc modul c g trn nhng

thanh ray ( RACK).

* Modul CPU.

L modul c cha b vi x l, h iu hnh, b nh, cc b thi

gian, b m, cng truyn thng( chun truyn RS485) v c

th cn c mt vi cng vo /ra s ( Digital). Cc cng vo ra c

trn modul CPU c gi l cng vo ra ONBOART.

Modul CPU bao gm cc loi sau :

*CPU 312-IFM

-6ES7-312-5AC00-OABO



-6ES7-312-5AC81-OABO-6ES7-312-5AC82-OABO

+Cc module ny c:

-Vng nh lm vic :6KB

-Thi gian x l 1 khi lnh:0.6ms/KAW

-DI/DO trn module CPU:10/6

-S dng trong ni mng MPI


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*CPU 313

-6ES7 313-1AD00-0AB0

-6ES7 313-1AD01-0AB0

-6ES7 313-1AD02-0AB0

-6ES7 313-1AD03-0AB0

+Cc module ny c:

-Vng nh lm vic :12KB



*CPU 314-6ES7 314-1AE01-0AB0

-6ES7 314-1AE02-0AB0

-6ES7 314-1AE03-0AB0

-6ES7 314-1AE04-0AB0

-6ES7 314-1AE83-0AB0

-6ES7 314-1AE84-0AB0

+Cc module ny c:




*CPU 314 IFM

-6ES7 314-5AE00-0AB0

-6ES7 314-5AE01-0AB0-6ES7 314-5AE02-0AB0

-6ES7 314-5AE03-0AB0

-6ES7 314-5AE82-0AB0

-6ES7 314-5AE83-0AB0

+Cc module ny c:

-Vng nh lm vic :T 24KB n 32KB


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-DI/DO trn module CPU:20/16

-Truyn thng kiu MPI

*CPU 315

-6ES7 315-1AF00-0AB0

-6ES7 315-1AF01-0AB0

-6ES7 315-1AF02-0AB0

-6ES7 315-1AF03-0AB0

+Cc module ny c:

-Vng nh lm vic :48KB-Thi gian x l 1 khi lnh:0.3ms/KAW


*CPU 315-2DP

-6ES7 315-2AF00-0AB0

-6ES7 315-2AF01-0AB0

-6ES7 315-2AF02-0AB0

-6ES7 315-2AF03-0AB0

-6ES7 315-2AF82-0AB0

-6ES7 315-2AF83-0AB0

+Cc module ny c:



-Truyn thng kiu MPI,Profilbus-DP*CPU 316

-6ES7 316-1ag00-0ab0

+Cc module ny c:





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*CPU 316-DP

-6ES7 316-2AG00-0AB0

+Cc module ny c:



-Truyn thng kiu MPI,Profilbus-DP

*CPU 318-2

-6ES7 318-2AJ00-0ab0

+Cc module ny c:

-Vng nh lm vic :256KB-Thi gian x l 1 khi lnh:0.3ms/KAW


*CPU 614

-6ES7 614-1aH00-0ab3

-6ES7 614-1aH01-0ab3

-6ES7 614-1aH02-0ab3

-6ES7 614-1aH03-0ab3

+Cc module ny c:

-Vng nh lm vic :128KB n 192KB



*CPU 614

-6ES7 614-1AH00-0AB3-6ES7 614-1AH01-0AB3

-6ES7 614-1AH02-0AB3

-6ES7 614-1AH03-0AB3

+Cc module ny c:

-Vng nh lm vic :T 128KB n 192KB



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-DI/DO trn module CPU:512KB

-Truyn thng kiu MPI

*CPU M7

+CPU 388-4

-6ES7-388-4BN00-0AC0

* Cc modul m rng.

Cc modul m rng c chia lm 5 loi chnh..

1. PS (Power supply) module ngun nui: c 3 loi 2A, 5A, 10A.

2. SM (Sigal module): Module m rng cng tn hiu vo/ra

gm:- DI (Digital Input): module m rng cng vo s c th l 8, 16

hoc 32 tu thuc vo tng loi module.

- DO (Digital Output): module m rng cng ra s.

- DI/DO: module m rng cng vo/ra s.

- AI (Analog Input):cng vo tng t, chng l nhng b

chuyn i tng t s 12 bits.

- AO (Analog Output) Module cng ra tng t, l nhng b

chuyn i tng t(DA).

- AI/AO: Module m rng cc cng vo/ra tng t.

3. IM (Interface Module) Module ghp ni:

L loi module chuyn dng c nhim v ni tng nhm cc

module m rng li vi nhau thnh mt khi v c qun ly chung

bi 1 module CPU.Thng thng cc module m rng c g lin nhau trn mt

thanh gi l Rack. Mi 1 Rack c th g c nhiu nht 8

module m rng (khng k module CPU, module ngun nui). Mt

module CPU S7-300 c th lm vic nhiu nht vi 4 Rack v cc

Rack ny phi c ni vi nhau bng module IM.


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4. FM (Function Module) :Module c chc nng iu khin

ring: VD module ng c bc, module PID.

5. CP (Commuication Module):Module phc v truyn thng

trong mng gia cc PLC vi nhau hoc gia PLC vi my tnh.

S kt ni trm PLC S7 - 300

II.2 X l cc tn hiu vo ra, cu trc b nh trong PLC.

Cc tn hiu vo ra t u vo ra ca PLC s c lu tr trongcc vng nh. x l cc tn hiu ny ta truy nhp vo vng a

ch ly cc gi tr ca chng. Sau y s trnh by cu trc

b nh v cc truy nhp cho PLC Siemens.

* Phng php truy nhp.

PLC lu tr thng tin trong b nh. B nh ca PLC c chia lm

nhiu vng (I, Q, M, T, C,.) mi vng nh u c a ch xc


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nh. Ta c th truy nhp (ghi hoc c thng tin) vo cc nh

trong cc vng bng a ch ca chng. C 2 cch truy nhp theo

ting bit hoc truy nhp theo byte.

+Truy nhp theo tng bit: truy nhp theo tng bit ta phi

nh a ch bao gm: a ch vng nh, a ch byte, a

ch bit (ngn cch gia a ch byte v a ch bit l du .

MSB LSB01234567

I0I1I2I3I4I5I6I7

MSB: Most Significant BitMSB: Lcast Significant Bit

Vd: I 3.4S th t Bit trong byte: bit th 5 (0 n 7)Ng n c ch gia a chbyte v a chbit

a chbyte: byte 3 ( byte th 4)Tn v ng nh : I = v ng nh vo

Nh vy thng tin ca u vo I3.4 s c lu tr trong nh ca ch I3.4 . Truy nhp vo nh ny s bit c thng tin u

vo I3.4.

+Truy nhp theo byte: Ta c th truy nhp cc vng nh theo

byte, Word (2 byte), Double Word (4 byte). truy nhp theo cc

phng php ny ta phi nh a ch bao gm: a ch vng nh

(V, I, Q, M, SM, T, C, HC)

II.3 Ngun nui v ng ra ca PLC S7-300.

- Ngun nui: l n v dng chuyn i ngun AC

thnh ngun DC (5V, 24V) cung cp cho CPU v cc khi vo

ra.

-Ng ra: Plac S7-300 c ng ra l cc phn t hot ng tng

thch vi cc loi tn hiu vo nh Role, cc van iu khin.

II.4 Cc h m v cc kiu d liu.GVHD: nguyen dinh khanh SV:giap van thuy

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4.1. Cc h m:

Chng ta s dng rt nhiu h m, quen dng nht vn l h

thp phn (h m c s 10). Tuy nhin ngoi h thp phn

cn c rt nhiu cc h m khc:

- H nh phn: l h m c s 2, s dng 2 con s 0 v 1

biu din gi tr.

- H bt phn: l h m c s 8, s dng 8 con s

0,1,2,3,4,5,6,7 biu din cc gi tr.

- H thp phn: l h m c s 10 dng cc con s

0,1,2,3,4,5,6,7,8,9 biu din cc gi tr.- H thp lc phn: l h m c s 16 s dng 16 con s

0..F biu din cc gi tr.

4.2. Cc kiu d liu.

PLC lu tr cc d liu trong cc b nh, cc d liu ny c th

c lu tr nhiu dng khc nhau:

- BOOL: vi dung lng l 1bit v c gi tr l 0 hoc 1, y l

kiu d liu bin c 2 gi tr.

- BYTE: gm 8 bits, thng c dng biu din 1 s nguyn

dng trong khong 0.255 hoc m ASCII ca 1 k t.

- WORD: gm 2 bytes biu din s nguyn dng t 0

65535.

- DWORD: l t kp c gi tr l 0.232-1.

- INT: cng c dung lng 2 bytes, dng biu din 1 snguyn trong khong -32768..+32767 (2-15.215-1).

- REAL: c dung lng l 4 bytes dng biu din 1 s thc

trong khong

-3,4E38..3,4E38.

III. Cu trc b nh ca CPU ca PLC S7 - 300.

c chia ra lm 3 vng chnh:


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1) Vng cha chng trnh ng dng: vng nh chng trnh c

chia lm 3 min:

+ OB: Min cha chng trnh t chc.

+ FC: ( Funktion ) Min cha chng trnh con c t chc

thnh hm c bin hnh thc trao i d liu vi chng

trnh gi n.

+ FB: ( Funktion Block) Min cha chng trnh con,c t

chc thnh hm v c kh nng trao i d liu vi bt c mt

khi chng trnh no khc. Cc d li phi c xy dng thnh

mt khi d liu ring ( gi l DB - Data block).2) Vng cha cc tham s ca h iu hnh v chng trnh

ng dng, c chia thnh 7 min khc nhau, bao gm:

I ( Procees image input): Min b m cc d liu cng vo

s. Trc khi thc hin chng trnh, PLC s c gi tr logic ca tt

c cc u vo v ct gi chng vo vng nh I. Thng thng ch-

ng trnh ng dng khng c trc tip trng thi logic ca cng

vo m ch ly d liu ca cng vo t b m I.

Q ( Procees image output): Min b m cc cng ra s. Kt

thc giai on thc hin chng trnh chuyn gi tr ca b m

ti cng ra s. Thng thng khng trc tip gn gi tr ti tn

cng ra m ch chuyn chng vo b nh Q.

M: Min cc bin c. Chng trnh ng dng s dng vng nh

ny lu gi cc tham s cn thit v c th truy cp n theoBit (M), Byte(MB) , t (MW) hay t kp(MD).

T: Min nh ph v b thi gian(TIME) bao gm vic lu gi gi

tr thi gian dt trc ( PV - Preset Value), gi tr m thi gian

tc thi ( CV - Curren Value) cng nh cc gi tr logic u ra ca

b thi gian.


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C: Min nh phc v b m ( Counter) bao gm vic lu gi gi

tr t trc (PV), v gi tr m tc thi (CV) v gi tr logic u

ra ca b m.

PI: Min a ch cng vo ca cc modul tng t. Cc gi tr

tng t ti cng vo ca modul tng t s c c v chuyn t

ng theo nhng a ch. Chng trnh ng dng c th truy

nhp min nh PI theo tong byte (PIB), tng t (PIW) hoc theo t

kp (PID).

PQ: Min a ch cng ra cho cc modul tng t. Cc gi tr

theo nhng a ch ny c modul tng t chuyn ti cc cngra tng t. Chng trnh ng dng c th truy cp min PQ theo

tng byte (PQB), tng t (PQW) hoc theo t kp (PQD).

3) Vng cha cc khi d liu: c chia lm hai loi

DB (Data Block): Min cha cc d liu c t chc thnh khi.

Kch thc cng nh khi lng do ngi s dng quy nh, ph hp vi

tng bi ton iu khin. Chng trnh ng dng c th truy cp

min nh ny theo tng bit, byte, tng t hoc t kp.

L (Local data block): Min d liu a phng, c cc khi ch-

ng trnh OB, FB, FC t chc v s dng cho cc bin nhp tc

thi v trao i d liu ca cc bin hnh thc ca chng trnh

vi cc khi chng trnh gi n. Ni dung ca mt s d liu

trong min nh ny s b xoa khi kt thc chng trnh tng ng

trong OB, FB, FC. Min ny c th truy cp theo tng bt (L), byte(LB), t (LW), t kp (LD).

IV. Vng qut ca chng trnh.

SPS (PLC) thc hin cc cng vic (bao gm c chng trnh

iu khin) theo chu trnh lp. Mi vng lp c gi l mt

vng qut (scancycle). Mi vng qut u bt u bng vic

chuyn d liu t cc cng vo s ti vng b m o I, tip theo


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l giai on thc hin chng trnh. Trong tng vng qut, chng

trnh thc hin t lnh u tin n lnh kt thc ca khi

OB1. sau giai on thc hin chng trnh l giai on chuyn

ni dung ca b m o Q ti cc cng ra s. Vng qut c kt

thc bng giai on x l cc yu cu truyn thng ( nu c) v

kin tra trng thi ca CPU. Mi vng qut c th c m t nh

sau:

Truyn d liu t cngvo t i I

Thc hin ch-ngtrnh

Chuyn d liu tQ ra cng

Truyn thng v

kin tra ni b

Vng qut

Qu trnh hot ng ca mt vng qut

Ch : B m I v Q khng lin quan ti cc cng vo ra tngt nn cc lnh truy nhp cng tng t c thc hin trc tip vi

cng vt l ch khng thng qua b m.

Thi gian cn thit PLC thc hin mt vng qut c gi l

thi gian vng qut (Scan time). Thi gian vng qut khng c

nh, tc l khng phi vng qut no cng thc hin trong mt

khong thi gian nh nhau. C vng qut thc hin lu, c vng

qut thc hin nhanh tu thuc vo s cu lnh trong chng

trnh c thc hin, vo khi d liu truyn thng trong vng

qut .

Nh vy gia vic c d liu t i tng cn x l, tnh ton

v vic gi thng tiniu khin n i tng c mt khong thi

gian bng thi gian mt vng qut. Ni cch khc, thi gian vng

qut quyt nh thi gian thc ca chng trnh iu khinGVHD: nguyen dinh khanh SV:giap van thuy

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trong PLC. Thi gian vng qut cng ngn, tnh thi gian thc

ca chng trnh cng cao.

Nu s dng cc khi chng trnh c bit c ch ngt,

v d khi OB40, OB80.Chng trnh ca cc khi s c

thc hin trong vng qut khi xut tn hiu bo ngt cng chng

loi. Cc khi chng trnh ny c th thc hin ti mi vng qut

ch khng b g p l phi trong giai on chng trnh.

Chng hn mt tn hiu bo ngt xut hin khi PLC ang giai

on truyn thng v kin tra ni b, PLC s tm dng cng vic

truyn thng, kin tra, thc hin ngt nh vy, thi gian vngqut s cng ln khi cng c nhiu tn hiu ngt xut hin trong

vng qut. Do nng cao tnh thi gian thc cho chng

trnh iu khin, tuyt i khng nn vit chng trnh x l

ngt qu nhiu hoc s dng qu lm dng ch ngt trong

chng trnh iu khin.

Ti thi im thc hin lnh vo ra, thng thng lnh khng

lm vic trc tip vi cng ra vo m ch thng qua b nh m

ca cng trong vng nh tham s. Vic truyn thng gia cc b

m o vi ngoi vi trong giai on 1 v 3 do h iu hnh CPU

qun l, mt s modul CPU, khi gp lnh vo /ra ngay lp tc

h thng s cho dng mi cng vic khc, ngay c chng trnh x

l ngt thc hin vi cng vo /ra.

V. Nhng khi OB c bit.Khi OB1 c chc nng qun l chnh trong ton b chng

trnh, c ngha l n s thc hin mt cch u n tng

vng qut khi thc hin chng trnh. Ngoi ra Step7 cn c

nhiu khi OB1 c bit khc v mi khi OB c mt nhim

v khc nhau, v d cc khi OB cha cc chng trnh ngt ca


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chng trnh bo li.Tu thuc vo CPU khc nhau m c cc

khi OB khc nhau. v d khi OB c bit.

OB10 (Time of Day Interrupt): Chng trnh trong khi OB10 s

c thc hin khi gi tr ca ng h thi gian thc nm trong

mt khong thi gian quy nh. OB10 c th c gi mt ln,

nhiu ln cch u nhau tng pht, tng gi, tng ngy.Vic

quy nh thi gian hay s ln gi OB10 c thc hin bng ch-

ng trnh h thng SFC28 hoc trong bng tham s modul CPU

nh phn mm Step7.

OB20 (Time Delay Interrupt): Chng trnh trong khi OB20 sc thc hin sau mt khong thi gian ch t trc k t khi gi

chng trnh h thng SFC32 t thi gian ch.

OB35 (Cyclic Interrupt): Chng trnh OB35 s c thc hin

cch u nhau mt khong thi gian c nh. Mc d khong

thi gian ny l 100ms, xong ta c th thay i trong bng t

tham s cho CPU nh phn mm Step7.

OB40 (Hardware Interrupt): Chng trnh trong khi OB40 s -

c thc hin khi xut hin mt tn hiu bo ngt t ngoi vi a

vo CPU thng qua cc cng vo/ra s onboard c bit hoc

thng qua cc modul SM, CP, FM.

OB80 (Cycle Time Fault): Chng trnh s c thc hinkhi thi

gian vng qut (Scan time) vt qua thi gian cc i quy nh

hoc khi c tn hiu ngt gi mt khi OB no m khi OBny cha kt thc ln gi trc. Mc nh, Scan time cc i l

150ms nhng c th thay i tham s nh phn mm Step7.

OB81 (Power Supply Fault): Nu c li v phn ngun cung cp

th gi chng trnh trong khi OB81.


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OB82 (Diagnostic Interrput) : Chng trnh trong khi ny s c

gi khi CPU pht hin c li cc modul vo/ra m rng. Vi iu

kin cc modul vo /ra ny phi c chc nng t kim tra mnh.

OB85 ( Not Load Fault): CPU s gi khi OB85 kh pht hin khi

chng trnh ng dng c s dng ch ngt nhng chng

trnh x l ngt li khng c trong khi OB tng ng.

OB87 (Communication Fault): Chng trnh trong khi ny s -

c gi khi CPU thy c li trong truyn thng.

OB100 (Start Up Information): Khi ny s c thc hin mt

ln khi CPU chuyn trng thi t STOP sang trng thi RUN.OB121 (Synchronouns error): Khi ny s c gi khi CPU pht

hin thy li logic trong chng trnh nh i sai kiu d liu

hoc li truy nhp khi DB, FC, FB khng c trong b nh CPU.

OB122 (Synchronouns error): Khi ny s c thc hin khi CPU

pht hin thy li truy cp modul trong chng trnh, v d trong

chng trnh c lnh truy nhp modul m rng nhng li khng c

modul ny.

VI. Thanh ghi trng thi.

Khi thc hin lnh, CPU s ghi li trng thi ca php tnh trung

gian cng nh kt qu vo 1 thanh ghi c bit 16 bits, c gi l

thanh ghi trng thi (Status Word). Mc d thanh ghi trng thi ny

c di 16 bits nhng ch s dng 9 bits vi cu trc nh sau:BR CC1 CC0 OV OS OR STA RLO FC

- FC (First Check): Khi phi thc hin 1 dy cc lnh logic lin

tip nhau gm cc lnh v, hoc v nghch o, bits FC c

gi tr bng 1. Ni cch khc, FC = 0 khi dy cc lnh logic lin tip

va c kt thc. V d:

A I0.3 // FC = 1GVHD: nguyen dinh khanh SV:giap van thuy

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AN I0.3 // FC = 1

= Q4.0 // FC = 0

- RLO (Result of Logic Operation): Kt qu tc thi ca php

tnh logic va c thc hin. V d lnh

A I0.3

+ Nu trc khi thc hin bits FC = 0 th c tc ng chuyn

i ni dung ca cng vo I0.3 vo bt trng thi RLO.

+ Nu trc khi thc hin bits FC = 1 th c tc dng thc

hin php tnh AND gia RLO v gi tr logic cng vo I0.3. Ktqu ca php tnh c ghi li vo bits trng thi RLO.

- STA (Status bits): Bits trng thi lun c gi tr logic ca tip

im ch nh trong lnh. V d c hai lnh

A I0.3

AN I0.3

u c gn cho bits STA cng mt gi tr l ni dung ca

cng vo s I0.3

- OR: Ghi li gi tr ca php tnh logic AND cui cng c thc

hin ph gip cho vic thc hin php ton OR sau . iu

ny l cn thit v trong biu thc hm gi tr, php tnh AND

bao gi cng c thc hin trc cc php tnh OR.

- OS (Stored overflow bit): Ghi li gi tr bt php tnh trn ra

ngoi mng nh.- OV (Overflow bit): Bit bo kt qu php tnh b trn ra ngoi

mng nh.

- CC0 v CC1 (Condition code): Hai bit bo trng thi kt qu

php tnh vi s nguyn, s thc, php chuyn dch hoc php

tnh logic trong ACCU. C th l:


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* Khi thc hin lnh ton hc nh cng, tr, nhn, chia vi s

nguyn hoc s thc.

CC1 CC0 ngha0 0 Kt qu bng 0 (=0)0 1 Kt qu nh hn 0 (0)

* Khi thc hin lnh ton hc vi s nguyn nhng kt qu b

trn nh.

CC1 CC0 ngha0 0 Kt qu qu nh khi

thc hin lnh cng

(+I, +D)0 1 Kt qu qu nh khi

thc hin lnh nhn

(*I, *D) hoc qu ln khi

thc hin lnh cng tr

(+I, +D, -I, -D).1 0 Kt qu qu ln khi thc

hin lnh nhn, chia

(*I, *D, /I, /D) hoc qu

nh khi thc hin lnh

cng tr (+I, +D, -I, -D).1 1 Kt qu b trn do thc

hin lnh chia cho 0 (/I,

/D).

* Khi thc hin lnh ton hc vi s thc nhng kt qu b trn

nh

CC1 CC0 ngha0 0 Kt qu c s m e qu

ln0 1 Kt qu c mantissa

qu nhGVHD: nguyen dinh khanh SV:giap van thuy

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1 0 Kt qu c mantissa

qu ln1 1 Php tnh sai quy

chun* Khi thc hin lnh chuyn dch:

CC1 CC0 ngha0 0 Gi tr ca bit b y

ra bng 01 0 Gi tr ca bit b y

ra bng 1

* Khi thc hin lnh logic trong ACCU:

CC1 CC0 ngha0 0 Kt qu bng 0 (=0)1 0 Kt qu khc 0 (#0)

- BR (Binary result bit): Bit tng thi cho php lin kt hai loi

ngn ng lp trnh STL v LAD. Chng hn cho php ngi s dng

c th vit mt khi chng trnh FB hoc FC trn STL nhng giv s dng chng trong mt chng trnh khc trn LAD. to ra

c mi lin kt , ta cn phi kt thc chng trnh trong FB,

FC bng bng ghi

+ 1 vo BR, nu chng trnh chy khng c li.

+ 0 vo BR, nu chng trnh chy c li.

Khi s dng cc hm c bit ca h thng (STL hoc

LAD), trng thi lm vic ca chng trnh cng c thng bo ra

ngoi qua bit trng thi BR nh sau

+1, nu SFC hay SFB thc hin khng c li.

+0, nu c li khi thc hin SFC hay SFB.


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Chng III k thut lp trnh PLC s7 - 300

I. Gii thiu chung.

I.1. Lp trnh tuyn tnh v lp trnh c cu trc.

B nh ca CPU dnh cho chng trnh ng dng c tn gi l

logic block. Nh vy logic block l tn chung gi tt c cc khi

chng trnh bao gm: khi chng trnh t chc OB, khi chng

trnh FC, khi hm FB.trong cc khi chng trnh ch c duy

ngt khi OB1 c thc hin trc tip theo vng qut. N c h

iu hnh gi theo chu k lp vi khong thi gian khng cchu nhau m ph thuc vo di ca chng trnh. Cc loi

khi chng trnh khc khng tham gia vo vng qut.

Vi hnh thc t chc nh vy th phn chng trnh trong khi

OB1 c y iu kin ca mt chng trnh, iu kin thi

gian thc v ton b chng trnh ng dng c th ch cn vit

trong OB1 l . Cch vit t chc chng trnh vi ch mt khi

OB1 duy nht nh vy gi l lp trnh tuyn tnh (LinearProgramming)


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S khi kiu lp trnh tuyn tnh

Khi OB1 c h thng gi xoay lin tc theo vng qut.

Cc khi OB khc khng tham gia vo vng qut c gi bng

cc tn hiu ngt. S7 - 300 c nhiu tn hiu bo ngt nh tn

hiu bo ngt khi c s c ngun nui, c s c chp mch cc

modul m rng, tn hiu bo ngt theo chu k thi gian, v mitn hiu ngt nh vy cng ch c kh nng gi mt khi OB nht

nh. V d s c bo ngt ngun nui ch gi khi OB81, tn

hiu bo ngt truyn thng ch gi khi OB87.

Mi tn hiu bo ngt h thng s dng cng vic ang thc

hin li, chng hn tm dng cng vic trn khi OB1 v thc hin

chuyn sang thc hin chng trnh x l ngt trong cc khi OB

tng ng. V d khi ang thc hin chng trnh trn khi OB1m xut hin bo s c truyn thng, h thng s tm dng thc

hin trn OB1 li gi chng trnh truyn thng khi OB87.

Ch khi no thc hin xong chng trnh trn khi OB87 th h

thng quay tr li thc hin tip chng trnh OB1.

Lp trnh c cu trc: Chng trnh c chia thnh nhiu phn

nh vi tng nhim v ring v cc phn ny nm trong nhng


OB1thchintheovngqut

OB10 Ngt thi im

nh trc

OB82 Modulchun on li

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khi chng trnh khc nhau. Loi hnh cu trc ny ph hp vi

nhiu bi ton iu khin nhiu nhim v v phc tp, li rt

thun li cho vic sa cha sau ny.

DB

DB

DB DB

S kiu lp trnh c cu trc.

I.2 Quy trnh thit k h iu khin PLC v cc phn t

lgic c bn.

1. Quy trnh thit k h thng iu khin dng PLC

bao gm cc bc sau:

a. Xc nh quy trnh iu khin.

iu u tin cn bit l i tng iu khin ca h thng,

mc ch chnh ca PLC l phi iu khin c cc thit b

ngoi vi. Cc chuyn ng ca i tng iu khin c kim tra

thng xuyn bi cc thit b vo, cc thit b ny gi tn hiu

vo PLC v tip PLC s a tn hiu iu khin n cc thitb iu khin chuyn ng ca i tng.

b. Xc nh tn hiu vo ra.

Bc th 2 l phi xc nh v tr kt ni gia cc thit b vo

ra vi PLC. Thit b vo c th l tip im, cm bin.Thit b

ra c th l rle in t, mt, nMi v tr kt ni c nh

s tng t ng vi PLC s dng


41

OB

FB FC SFB

FB FB SFC


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c. Son tho ch ng trnh.

Chng trnh iu khin c son tho di dng lu hnh

thang.

d. Np ch ng trnh vo b nh.

Cp ngun cho PLC, ci t cu hnh khi giao tip I/O nu

cn. Sau np chng trnh son tho trn mn hnh vo b nh

ca PLC. Sau khi hon tt nn kin tra li bng chc nng chun

on v nu c th th chy chng trnh m phng ca h

thng.

e. Chy ch ng trnh.Trc khi khi ng h thng cn phi chc chn dy ni t

PLC n cc thit b ngoi vi l ng. Trong qu trnh chy kin

tra c th cn thit thc hin cc bc chnh h thng nhm m

bo an ton khi a vo hot ng thc t.


42

Sa cha ch-ng trinh

Chm dt


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43

Xc nh yucu ca h

Lit k cc thitb I/O tng ngvi cc u I/O

Np chngtrnh vo

Son tho ch-ng trnh

Chy m phngv tm li

Kim

Chy thchng

Kt ni ccthit b I/O vo

Np voEPROM

To ti li uchng

Chy tt


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Quy trnh thit k mt h iu khin t ng

II. Ngn ng lp trnh cho PLC S7 - 300.

vit chng trnh iu khin trn PLC c 3 phng php c

bn l:


44

Sa chachng trinh

Chm dt

V lu iu khin

Chytt

Kim trady ni

YESNO

NO

YES


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-S hnh thang LAD (Ladderr Diagram).

-Lu h thng iu khin FBD (Function Block Diagram).

-Lit k lnh STL (Statement List).

Mt chng trnh vit trn LAD hoc FBD c th chuyn sang

STL, nhng khng xy ra ngc li v trong STL c nhiu lnh khng

c trong LAD hay FBD.

1. Ph ng php lp trnh bng LAD.

Phng php ny c cch biu din chng trnh tng t nh s

tip im dng Rle trong s in cng nghip.VD:

S iu khin ni cng dng Rle c biu din bng ph-ng php LAD.:

2. Ph ng php lp trnh bng FBD.

Phng php ny c cch biu din di dng lin kt ca cc hm

lgic k thut s, loi ngn ng ny thch hp cho nhng ngiquen s dng v thit k mch iu khin s. VD:


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3. Phng php lp trnh theo ngn ng STL.

Phng php ny l ngn ng lp trnh theo kiu lit k cc

cu lnh thnh tp hp lnh, mi lnh thc hin mt chc nng.

Tng t vi ngn ng Assembler my tnh, phng php ny

thch hp vi nhng i tng lm vic trong lnh vc tin hc. VD:

III. Lp trnh v chn ch lm vic cho PLC S7-300.

1.Gii thiu chung.

Lp trnh c ngha l nhp mt mch vo trong phn mm

ca PLC S7-300. y thc ra l cch biu din khc ca s

mch. Chng ta vit chng trnh trn phn mm son tho

Simentic S7 mt cch ngn gn v ph hp nht.

Trn phn mm son tho ny, s mch iu khin c thc vit theo cc ngn ng khc nhau nh bng ngn ng LAD,

FBD, STLv mt im cn lu l vi Simentic S7-300 ta thng

son tho chng trnh trn khi OB1.

2. Lp trnh trn Simentic S7-300.

2.1.Chn giao din cho PLC.


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Mun chn giao din no, ta nh du b giao din pha

tri ri n phm Install B giao din c chn s c ghi vo

bn phi. Sau khi chn xong b giao din s dng, ta cn phi ci

t tham s lm vic cho b giao din bao gm tc truyn,

cng ghp ni my tnh..

2.2. Khai bo v m mt ProJect mi.

T giao din ca PLC chn File -> New hoc kch chut vo

biu tng New Project/Library

Khai bo mt Projest mi

Ni m mt Project c


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Khi trn mn hnh s xut hin hp thoi, g tn Project ri

n phm OK v nh vy ta khai bo xong mt Projeck mi. Ta

cng c th chn ni ct Project mi, mc nh ni ct l th mc

C:\siemens\step7\S7 Proj.

N i vit tn mt Project

Sau khi khai bo xong mt Project mi th trn mn hnh xut

hin Project nhng dng rng (cha c g), nh hnh v:

Biu tng


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mt th mc rng

Trong trng hp mun m mt Project mi ta chn File -> Open,

hoc kch chut vo biu tng Open Project/Library ri chn tn

mun m sau n phm OK.

Tn mt Project c sn

2.3. Son tho ch ng trnh trn khi OB1.

Ta nhy chut vo biu tng ca khi OB1 ca s bn phi.

nh hnh v:

Biu tng khi OB1


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Khi y trn mn hnh s xut hin ca s, ta vit chng trnh

iu khin trn ca s ny. VD:Ta c th vit chng trnh bng nhiu th ngn ng khc

nhau trn ca s son tho ny nh ngn ng LAD, PBD. STL.


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Khi lp trnh xong c th chy th chng trnh bng cch: vo

biu tng Simulation -> Download -> chn s lng u vo v s

lng u ra -> Run_p -> quay li mn hnh son tho kch vo

biu tng Monitor.

IV. Cc khi, hm v chc nng ca n trong PLC.

1. Cc hm lgic tip im.- Hm AND: tn hiu ra bng 1 khi tt c cc tn hiu vo

bng 1.

FBD LAD STL

- Hm OR: Tiu ra bng 1 khi mt trong cc tn hiu vo bng

1.

FBD LAD STL

- Hm NOT: Tn hiu ra l o ca tn hiu vo:

FBD LAD STL


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- Hm XOR: tn hiu ra bng 1 khi hai tin hiu vo khc nhau:

FBD LAD STL

-Lnh xo RESET: Tn hiu ra b xo khi co tn hiu vo.

- Lnh SET: Tn hiu ra bng 1 khi c tn hiu vo (tn hiu

ny c lu gi c khi khng c tn hiu vo):

FBD LAD STL


FBD LAD STL

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- Lnh POSITIVE: Cho mt xung c rng bng mt vng

qut ti thi im c sn ln ca xung u vo:

FBD LAD STL

- Lnh NEGAITIVE: Cho mt xung c rng bng mt vng

qut ti thi im c sn xung ca xung u vo:

B nh RS: u ra bng 1 khi u S bng 1, u ra bng 0 khi

u R bng 1, nu R v S u bng 1 th u ra bng 1(u tin

SET):


FBD LAD STL

FBD LAD STL

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+ Hm so snh ln hn hoc bng nhau gia hai s thc 32

bt:


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Khi tn hiu vo I0.0 = 1 u ra Q0.0 = 1 v hm s thc hin

tr hai s nguyn 16 bt MW0 vi MW2. Kt qu c ct vo

MW10. Trng hp tn hiu vo I0.0 u ra Q0.0 v hm s khng

c thc hin chc nng ny.

3. Nhn hai s nguyn 16 bt:

FBD LAD STL

D liu vo v ra:

EN: BOOL IN1: INT

IN2: INT OUT: INT EN0: BOOL

Khi tn hiu vo I0.0 = 1 u ra Q0.0 = 1 v hm s thc hinnhn hai s nguyn 16 bt MW0 vi MW2. Kt qu c ct vo



4. Chia hai s nguyn 16 bt:

FBD LAD STL

D liu vo v ra:

EN: BOOL IN1: INTGVHD: nguyen dinh khanh SV:giap van thuy

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IN2: INT OUT: INT EN0: BOOL

Khi tn hiu vo I0.0 = 1 u ra Q0.0 = 1 v hm s thc hin

chia hai s nguyn 16 bt MW0 vi MW2. Kt qu c ct vo



4. Nhm hm i kiu d liu.

Trong ngn ng lp trnh ca S7- 300 c mt kiu d liu

khc nhau nh:

-S nguyn 16 bt (Interger)

-S nguyn 32 bt (DI)-S nguyn dng BCD

- V cc dng cc d liu khc.

Khi lm vic vi nhiu dng d liu khc nhau cho ta cn phi

chuyn i chng. V d khi c tn hiu t cng vo tng t

ta nhn c s liu dng s nguyn 16 bt mang gi tr tn hiu t-

ng t ch khng phi gi tr bn thn , bi vy phi x l

tip th cn phi chuyn i s nguyn thnh ng gi tr

thc, du phy ng ca tn hiu cng. Ta c mt s hm

chuyn i cc dng d liu nh sau:

a. Hm chuyn s BCD thnh s nguyn 16 bt:

FBD LAD STL

D liu vo v ra:

EN: BOOL IN: WORD

OUT: INT ENO: BOOLGVHD: nguyen dinh khanh SV:giap van thuy

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Khi tn hiu vo I0.0 = 1 u ra Q0.0 = 1 v hm thc hin

chc nng chuyn s BCD (MW10) sang s nguyn ri ct vo

MW12. Khi tn hiu vo I0.0 = 0 vo u ra Q0.0 = 0 v hm

khng thc hin chc nng chuyn i.

b. Hm chuyn s nguyn 16 bt thnh s BCD:

FBD LAD STL

D liu vo v ra:

EN: BOOL IN: WORD

OUT: INT ENO: BOOL

Khi tn hiu vo I0.0 = 1 u ra Q0.0 = 1 v hm thc hin

chc nng chuyn s nguyn (MW10) sang s BCD ri ct voMW12. Khi tn hiu vo I0.0 = 0 vo u ra Q0.0 = 0 v hm

khng thc hin chc nng chuyn i.

5. Cc hm i du.

Hm s thc hin chc nng i du d liu vo. Cc hm

i du nh i du s thc 16 bt, 32 bt, hay s nguyn (R).

FBD LAD STL

Dng d liu vo:GVHD: nguyen dinh khanh SV:giap van thuy

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NEG_I NEG_DI NEG_REN BOOL BOOL BOOLIN INT DI REALOUT INT DI REALENO BOOL BOOL BOOL

6. Cc hm thc hin chc nng lm trn (i liu d

liu):

FBD LAD STL


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xo tc thi trng thi ca T- Word v T- bit ngi ta s dng

mt tn hiu Reset Timer. Ti thi im sn ln ca tn hiu ny

gi tr T- Word v T- bit ng thi gi tr bng 0 tc l thanh ghi

tc thi CV c t v 0 v tn hiu u ra cng trng thi

logic 0. Trong thi gian tn hiu Reset c gi t logic l 1 Timer s

khng lm vic.

2. Khai bo s dng.

Cc tn hiu iu khin cho b Timer phi c khai bo theo

cc bc sau y:

- Khai bo tn hiu ENABLE nu mun tn hiu ch ng kch.- Khai bo tn hiu u vo U(t)

- Khai bo thi gian tr mong mun TW.

- Khai bo loi Timer c s dng (SP,SE, SD, SS, SF)

- Khai bo tn hiu xa Timer nu mun s dng ch Reset

ch ng.

Trong cc bc trn th bc 1 v 5 c th b qua.

- Dng d liu vo ra ca b Timer:

S: BOOL BI (DUAL): WORD

TW: S5TIME BCD(DEZ): WORD

R: BOOL Q:BOOL

- B thi gian SP: Ti thi im sn ln ca tn hiu vo SET

thi gian s c tnh, ng thi gi tr lgic u ra l 1. Khi thi

gian t kt thc gi tr u ra tr v 0:

FBD LAD STL


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Gin thi gian

Tn hiu S

Tn hiu R

Thi gian t

u ra

u ra o

Khi c tn hiu RESET (R) thi gian tnh lp tc tr v 0 v tn

hiu u ra cng bng c gi tr 0.- B thi gian SE:Ti thi im sn ln ca tn hiu vo SET

cui cng b thi gian c thit lp v thi gian s c tnh ng

thi gi tr u ra l 1. Kt thc thi gian t th u ra bng

0. Khi c tn hiu RESET (R) thi gian tnh lp tc tr v 0 v tn

hiu u ra cng bng c gi tr 0.


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FBD LAD STL

Gin thi gian:

Tn hiu S

Tn hiu R

Thi gian t

u ra

u ra o

- B thi gian SD: Ti thi im sn ln ca tn hiu vo SET

b thi gian c thit lp v thi gian s c tnh. Kt thc thi

gian t tn hiu u ra s c gi tr l 1. Khi S l 0 u ra cng

lp tc tr v 0, ngha l tn hiu u ra s khng c duy tr khi

tn hiu kch c gi tr l 0.

FBD LAD STL


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Gin thi gian:

Tn hiu S

Tn hiu R

Thi gian t

u ra

u ra o

- B thi gian SS:Ti thi im sn ln ca tn hiu vo SET

b thi gian oc thit lp v thi gian s c tnh. Kt thc thi

gian t tn hiu u ra s c gi tr 1, gi tr ny vn c duy

tr ngay c khi tn hiu vo kch S bng 0. Khi c tn hiu RESET

thi gian lp tc tr v 0 u ra cng bng 0.

Gin thi gian:


FBD LAD STL

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Tn hiu S

Tn hiu R

Thi gian t

u ra

u ra o- B thi gian SF: Ti thi im sn ln ca tn hiu vo SET

b thi gian c thit lp. u ra c gi tr bng1. Nhng thi gian

s c tnh thi im sn xung cui cng ca tn hiu u

vo S. Kt thc thi gian t th u ra bng 0:

FBD LAD STL

Gin thi gian:

Tn hiu S

Tn hiu R


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Thi gian t

u ra

u ra o

VII. B m COUNTER.

Counter thc hin chc nng m ti cc sn ca cc xung

u vo. S7-300 c ti a l 256 b m ph thuc vo tng loiCPU, k hiu Cx. Trong x l s nguyn trong khong t 0 n

255. Trong S7-300 c 3 loi b m thng s dng nht l :

B m tin(CU), B m li(CD), B m tim li(CUD).

CU: BOOL l tn hiu m tin

CD: BOOL l tn hiu m li

S: BOOL l tn hiu t

PV: WORD l gi tr t trc

R: BOOL l tn hiu xo

CV: WORD l gi tr m h m 16

CV_BCD: WORD l gi tr m h m BCD

Q: BOOL l tn hiu u ra

- B m tin CU:


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Nguyn l lm vic: Khi tn hiu I0.2 chuyn t 0 ln 1 b m

c t gi tr l 55. Gi tr u ra Q4.0 =1.

B m s thc hin m tin ti cc sn ln ca tn hiu ti

chn CU khi tn hiu I0.0 chuyn gi tr t 0 ln 1. Gi tr b

m tr v 0 khi c tn hiu ti sn ln ca chn R.

FBD LAD STL

- B m li CD:

Nguyn l hot ng: Khi tn hiu I0.2chuyn t 0 ln 1 b

m c t gi tr l 55. Gi tr u ra Q4.0 = 1B m s thc hin m li ti cc sn ln ca tn hiu ti

chn CD, khi tn hiu I0.0 chuyn gi tr t 0 ln 1. Gi tr ca b

m s tr v 0 khi c tn hiu ti sn ln ca chn R. B m s

ch m n gi tr >=0.

S khi:

FBD LAD STL


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- B m tin li.

Nguyn l hot ng: Khi tn hiu I0.2 chuyn t 0 ln 1 b

m c t gi tr l 55.Gi tr u ra Q4.0 = 1

B m thc hin m tin ti cc sn ln ca tn hiu ti

chn CU khi tn hiu I0.0chuyn gi tr t 0 ln 1.B m s m li ti cc sn ln ca tn hiu ti chn I0.1 khi

tn hiu I0.1 chuyn t 0 ln 1.

Gi tr ca b m s tr v 0 khi c tn hiu ti sn ln ca

chn R.

FBD LAD STL

Chng IV kt ni mng trong PLCIV.1-Mng MPI (Multi-point-Capable-Interface)

1-Gii thiu :

Mng MPI l mng giao din nhiu im phc v cho vic ni

my lp trnh vi cc thit b ngoi vi khc.Trong thit b iu

khin logic kh trnh(PLC),ch tn ti mt ng li duy nht vi

my lp trnh.MPI to ra kh nng ghp ni vi cc module kh


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trnh khc nh FM. Giao din MPI c ni bng cc bus pha sau

nh mt bus truyn thng.

Ghp ni: Mt vi thit b c kh nng ghp ni d liu vi

CPU

Kh nng:Mt my lp trnh c kh nng cng lm vic song

song vi mt panel iu hnh,v ni thm mt PLC na.C th

ni ng thi ng nhiu im trong mt CPU.Bn im /node

c th ni trong CPU 314.

c im ca MPI:S linh hot ca mng MPI c th hin

bng vn bn trn mn hnh,bng cc panel iu hnh,v bngmy lp trnh ca Siemens, mng MPI cung cp cc kh nng sau

y:

*Lp trnh CPU v cng vo/ra thng minh.

*Chc nng iu hnh h thng v chc nng thng bo.

*Trao i d liu gia my lp trnh v PLC.

*Trao i chng trnh gia CPU v thit b lp trnh.

c tnh:Nhng c tnh quan trng ca mng MPI bao gm

:

*Cng RS 485 v tc truyn thng 187.5Kbaud.

>Khong cch t 50m cho n 9100m cn c khuych i

trung gian(b phc hi)

>Cc thnh phn tiu chun ca mng PROFIBUS(Cable,ni,v

b phc hi).2-Khai bo mng MPI.

khai bo mt mng MPI ta cn lm cc bc sau:

*Ta vo phn mm STEP7.

*M mt Project mi bng cch chn FileNew.

*Sau xy dng cu hnh cng cho trm PLC bng cch ta

vo


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-InsertStationSimatic 300 Station

-InsertStationSimatic 400 Station

-Sau ta khai bo phn cng cho tng Progam S7-300 vS7-400


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2.3-Mng vo ra phn tn

Mng vo ra phn tn l mt mng trong cc thit b vo

ra phn tn c ghp ni vi nhau qua cc Bus nh :

+Profilbus-DP

+Profilbus-PA

Thit b vo ra phn tn khc vi mt PLC ch n khng cb x l trung tm CPU.Thay vo ,n c tch hp cc vi mch

giao din mng cng nh phn mn x l giao thc. Tu theo cu

trc ca thit b vo/ra phn tn l dng module hay dng gn

nh m phn giao din mng c thc hin bng mt module

ring bit hay khng.

Hnh trn minh ha cch ni mng Profilbus-DP cho mt thit

b vo/ra phn tn c cu trc module.V nguyn tc,phng

php ny khng khc so vi cch ghp ni cc b PLC


73

PS Interface DI DO AI AOModule

Cng DP

Profibus-DP

DistributedI/0


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Chng V thit k ch to m hnh m phng

I. Kho st h thng iu khin h thng n giao thng ti ng t.

1. nguyn tc iu khin v hot ng ca h thng.

Ti mt ng t giao nhau bi hai ng ln ngi ta c rt nhiu

cch iu khin bng 3 pha. Nhng mt trong nhng cch iu

khin ang c s dng rt nhiu trong thc t, nguyn tc

hot ng nh sau:

M hnh cc n v nguyn tc iu khin hng i


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Gi s ta ang tham gia giao thng ti ng t nay. Ta s tham gia

giao thng nh sau: Khi c n xanh ng chnh, ta c quyn i

theo chiu mi tn:

Sau thi gian t c nh h thng iu khin hot ng.

H thng s chuyn t n xanh n n ca ng chnh.

H thng n diu khin trng thi ln hai, ngi tham gia giao

thng s thc hin theo chiu mi tn:

Khi h thng chuyn dch n ca h thng n phn

nhnh r. Ngi tham gia giao thng s dng li v chuyn sang cho

h thng n ng khc:


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Sau vi giy chuyn sang ng khc v hot ng theonguyn tc nh ng trn:

2. Phng php iu khin bng R le trung gian.

a) c im

Cc loi rle trung gian t ng iu khin c c im

chung l:

- Tn s ng ngt ln (10001200 ln/gi) nn yu cu c

tui th cao c th t (1 10).106 ln ng ngt.

- C rle in xoay chiu v rle in mt chiu, nhiu khi

v cng sut tiu th ca rle (t 0,1W 2W) nn li thp nam

chm in ca rle in xoay chiu c lm ging nh ca rle

in mt chiu ( li hnh tr trn bng thp khi, thn v npGVHD: nguyen dinh khanh SV:giap van thuy

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+ in p vo :12VDC

+ Dng in nh mc tip im :10A

+ S lng tip im :c 2 tip im thng ng v 2 tip

im thng m.

+ ng ct Ngun : 220 VAC,10A

28 VDC, 10A+ Cng sut tiu th : 1,6 W (DC).

3. Cu hnh chung ca thit b m phng.

M hnh gm cc thit b sau:

+Khung hp lm sn

+H thng cc ct v bng n

+H thng iu khin

Trong :

Khung sn: c lm bng g, c kch thc 85cm . 85cm . 10cm.

y l ni lm sn dung ct n ng thi t cc linh kin

v ton b h thng i dy trong lng khung

H thng cc ct v bng:

+Ct c lm bng Inox v tng s c 8 ct: 4 ct nh v 4 ctln cho ng chnh. Ct nh c kch thc: ng knh 15cm, chiu

cao 20cm. Ct ln c chiu cao 28cm.


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+H thng bng: bao gm 44 bng phn lm 3 loi, 12 bng

mu vng, 16 bng mu xanh, 16 bng mu . L loi bng

in t c cng sut 4,4 W.

4. Gin thi gian.


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RL1

RL2

RL5

RL4

RL3

RL10

RL9

RL8

RL7

RL6

RL12

RL11

RL0

RL4

Start

Ch thch: theo nguyn tc hot ng ca h thng n th

rt kh c th xc nh c gin thi gian ca c h thng.

Do vy, chng ta phi tm cc n hot ng cng mt khong

thi gian v nhm vo mt r le. Cc thi gian ny c cc b thi

gian trong PLC iu khin.

*Mch in iu khin tng trng thi ca h thng

n.


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n tt nghip

H thng hot ng theo ng 1 chu k th phi hot ng

qua 12 trng thi.

RL0

RL1

RL2

RL3

RL4

H1

3

X3

K1

4

L1

7

10

PLCQ0.0

Q0.1

Q0.2

Q0.3

Q0.4

Thuong dong

RL0

RL5

RL2

RL3

RL4

H1

2

X2

K1

4

L1

7

10

PLCQ0.0

Q0.5

Q0.2

Q0.3

Q0.4

Thuong dong

1

1

2

3

23

4 5 6

456

7 8

78

9 10

10 9

X1X2X3

X1X2X3H1H2H3

H1H2H3

L1L2L3

L1L2

L3

K1K2K3

K1K2

K3

1

1

2

3

23

4 5 6

456

7 8

78

9 10

10 9

X1X2X3

X1X2X3H1H2H3

H1H2H3

L1L2

L3

L1

L2L3

K1K2K3

K1

K2K3


81


82/95


n tt nghip

RL0

RL6

RL2

RL3

RL4

H1

1

X1

K1

4

L1

7

10

PLC

1

1

2

3

23

4 5 6

456

7 8

78

9 10

10 9

X1X2X3

X1X2X3H1H2H3

H1H2H3

L1L2

L3

L1

L2L3

K1K2K3

K1

K2K3

Q0.0

Q0.6

Q0.2

Q0.3

Q0.4

Thuong dong

RL7*

RL6

RL2

RL3

RL4

H3

1

X1

K1

4

L1

7

10

PLC

1

1

2

3

23

4 5 6

456

7 8

78

9 10

10 9

X1X2X3

X1X2X3H1H2H3

H1H2H3

L1L2

L3

L1L2L3

K1K2K3

K1K2K3

Q0.4

Q0.3

Q0.2

Q0.6

Q0.7


82


83/95


n tt nghip

1

1

23

23

4 5 6

456

7 8

78

9 10

10 9

X1X2X3

X1X2X3H1H2H3

H1H2H3

L1L2L3

L1L2L3

K1K2K3

K1K2K3

RL0

RL6

RL9*

RL3

RL4

H1

1

X1

K3

6

L1

8

9

Thuong mo

PLC

Q0.3

Q1.1

Q0.6

Q1.7

RL0

RL6

RL10

RL3

RL4

H1

1

X1

K2

5

L1

8

9

Thuong mo

PLC

Q0.3

Q1.2

Q0.6

Q1.7

Q0.4

Q0.4

1

1

23

23

4 5 6

456

7 8

78

9 10

10 9

X1X2X3

X1X2X3H1H2H3

H1H2H3

L 1L 2L 3

L 1

L 2L 3

K1K2K3

K1

K2K3


83


84/95


n tt nghip

RL0

RL6

RL2*

RL3

RL4

H1

1

X1

K1

4

L1

8

9

PLC

1

1

23

23

4 5 6

456

7 8

78

9 10

10 9

X1X2X3

X1X2X3H1H2H3

H1H2H3

L1L2L3

L1L2L3

K1K2K3

K 1K 2K 3

Q1.7

Q0.6

Q1.6

Q0.4

Q0.3

Thuong mo

RL0

RL6

RL2

RL11

RL4

H1

1

X1

K1

4

L3

8

9

PLC

1

1

23

23

45 6

456

7 8

78

910

10 9

X1X2X3

X1X2X3H1H2H3

H1H2H3

L1L2L3

L1L2L3

K1K2K3

K1K2K3

Thuong mo

Q1.7

Q0.6

Q1.6

Q1.3


84


85/95


n tt nghip

1

1

23

23

4 5 6

456

7 8

78

9 10

10 9

X1X2X3

X1X2X3H1H2H3

H1H2H3

L 1L 2L 3

L 1L 2L 3

K1K2K3

K1K2K3

RL8*

RL6

RL2

RL3

RL4

H2

1

X1

K1

4

L1

7

10

PLCQ1.0

Q0.6

Q0.2

Q0.3

Q0.4

RL0

RL6

RL2

RL3

RL4

H1

1

X1

K1

4

L1

7

10

PLCQ1.7

Q0.6

Q1.6

Q0.3

Q0.4

1

1

23

23

4 5 6

456

7 8

78

9 10

10 9

X1X2X3

X1X2X3H1H2H3

H1H2H3

L 1L 2L 3

L1

L2L3

K1K2K3

K1

K2K3 PLCPLC

Chu trnh ca h thng n li c lp li theo chu k ban

u.


85


86/95


n tt nghip

*Mch iu khin bng PLC.

1. Bng quy nh u vo ra.

*Chng trnh ca h thng.


86


87/95


n tt nghip


87


88/95


n tt nghip


88


89/95


n tt nghip


89


90/95


n tt nghip


90


91/95


n tt nghip

Chng VI: ng dng ca PLC v h thng m hnh.

I.ng dng ca PLC.

PLC c ng dng rt rng ri nhiu lnh vc khc nhau

VD:

- iu khin h thng chiu sng trong cc ca hng, siu

th, nh hng,nh xng.

- iu khin ng m my cc ng c.- iu khin h thng n giao thng.

- H thng nng, vn chuyn.

- Dy truyn ng gi.

- Cc ROBOT lp rp sn phm.

- iu khin bm.

- Cng ngh sn xut giy.

- Cng ngh ch bin thc phm.

- Dy truyn ch to linh kin bn dn.

- Dy truyn lp gip tivi

- Dy truyn sn xut xi mng.

- iu khin bm.

- Dy truyn x l ho hc.


91


92/95


n tt nghip

- ng dng trong h thng bn nc t ng, my in hoa

vn

Gii thiu v h thng iu khin m my ng c

o chiu gin tip:

Yu cu cng ng:

Khi nhn nt khi ng ng c quay thun I0.1cp in

ng c quay thun, khi y c nhn nt khi ng ng c

quay ngc th ng c cng khng th quay ngc c. Nh vy

ch cho php khi ng ng c quay ngc khi nhn nt

dng I0.0.

Bng quy nh u vo ra:

Ch ng trnh lp trnh :


92


93/95


n tt nghip

LI KT

Sau khi nhn ti chng em xc nh r nhim v

v trch nhim ca mnh vi ti c giao. Qua vic

nghin cu ti tham kho ti liu cng kin thc hc,

cng vi s gip , hng dn nhit tnh ca thy gio

nguyen dinh khanh cng gip ca bn b cng vi s l lc

ca bn thn n nay ti ca chng em hon c

thnh. Trong qu trnh hon thnh ti chng em cn

nhiu sai st v cn nhiu trng hp trong thc t khng gii

quyt c. Chng em mong cc thy c gio v bn b trong

ngnh ng gp kin cho chng em nhng ti v

sau tt hn. Vi thi gian c hn nn mt s phn chng em


93


94/95


n tt nghip

cha c hon chnh, chng mong cc bn ra sau s pht huy

kh nng v vn kin thc ca mnh lm tt hn.

Trong qu trnh hon thnh ti, chng em

trnh by mt cch ngn gn, d hiu v c h thng gip

cho bn c thun li cho qu trnh nghin cu v ng dng.

Chng em rt mong thy c gio v bn b ng gp kin

chng em hon thnh tt hn nhng phn c giao sau.

Chng em xin chn thnh cm n thy gio nguyen

dinh khanh Ging Vin khoa in - in T gip

chng em hon thnh ti ny!

bac giang, Ngy 15 thng 6

nm 2010!

Sinh vin thc hin : giap van thuy

Ti liu tham kho

1. ng dng PLC SIEMENS v MOELLER trong t ng ho.

Nguyn Tn Phc. Nh xut bn TP H ch minh .

2. T ng Ho vi Simentic S7-300 Nguyn Don Phc, Phan Xun

Minh NXB KH-KT 2000.

3. Phn mn Simen LOGO Version 4.0.GVHD: nguyen dinh khanh SV:giap van thuy

94


95/95


n tt nghip

4. Lp trnh PLC vi S7 - 300 tc gi Nguyn Xun Cng ging

vin i hc s phm k thut Hng Yn

5. www.siemens.com/logo

6. Lun vn thc s v PLC ca H Bc

do an dung plc dieu khien den giao thong

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