©contrinex 2013 - jdc ppt_lf_fieldbus fieldbus j.-d. chatelain
TRANSCRIPT
©Contrinex 2013 - JDCPPT_LF_Fieldbus
Fieldbus
J.-D. Chatelain
Fieldbus
Master
1 1
2 2
3 3
Interface 1
RWM 1 RWM 2 RWM 3 RWM 4
1 1
RWM 1
Interface 2
2 2
RWM 1
Interface 3
RWM 3 RWM 4 RWM 2
3 3
Power supply
Fieldbus
Master
1 1
2 2
3 3
Interface 1
RWM 1 RWM 2 RWM 3 RWM 4
1 1
RWM 1
Interface 2
2 2
RWM 1
Interface 3
RWM 3 RWM 4 RWM 2
3 3
Power supply
Fieldbus
Master
1 1
2 2
3 3
Interface 1
RWM 1 RWM 2 RWM 3 RWM 4
1 1
RWM 1
Interface 2
2 2
RWM 1
Interface 3
RWM 3 RWM 4 RWM 2
3 3
Power supply
Fieldbus
Master
1 1
2 2
3 3
Interface 1
RWM 1 RWM 2 RWM 3 RWM 4
1 1
RWM 1
Interface 2
2 2
RWM 1
Interface 3
RWM 3 RWM 4 RWM 2
3 3
Power supply
©Contrinex 2013 - JDCPPT_LF_Fieldbus
Example:Read 4 words from address 10
J.-D. Chatelain
X
X
"R"
"D"
0
10
4
Power supply
Fieldbus
New command
X
X
X
Lire 4 mots à partir de l'adresse 10
0 0 1 0 0 RWM2
Read
Tag EM4056
From address 10
4 words
irrelevant
RWM2
No interface error
No RWM error
irrelevant
No data
01
Tags in front of RWM1 and RWM2Acknowledgment
PHASE 1Master
RWM 1
0
2
0
0
0 0 10 11 00 11
RWM 2 RWM 3 RWM 4
Slave
Command completed
X
X
"R"
"D"
0
10
4
Power supply
Fieldbus
X
X
X
Lire 4 mots à partir de l'adresse 10
0 0 1 0 0
RWM 1
0
2
0
0
0 0 10 11 00 11
RWM 2 RWM 3 RWM 4
Slave
01
irrelevant
Understood, end of communication
irrelevant
PHASE 1Master
Number of words
Power supply
Fieldbus
New command
Data + protections
Lire 4 mots à partir de l'adresse 10
0 0 1 0 0 01
"R"
"P"
RWM2
Reply
irrelevant
RWM2
No interface error
No RWM error
Data
RWM 1 RWM 2 RWM 3 RWM 4
Slave
6
2
0
0
0 0 10 11
DATA 2 (début)
00Tags in front of RWM1 and RWM2Releasing of data1
DATA 1
0
X
X
X
1 0
0
10
4
X
X
"R"
"D"
PHASE 2Master
61
0
10
4
X
X
Waiting next data
Lire 4 mots à partir de l'adresse 10
0 0 1 0 0 1
"R"
"P"
irrelevant
Data
RWM 1 RWM 2 RWM 3 RWM 4
Slave
0 0 10 11
DATA 2 (beginning)
DATA 1
1 0
1
DATA 2 (continuation)
2
0
0
DATA 3
DATA 4
Protection 1
Protection 2
1Releasing of data
PHASE 2Master
Power supply
Fieldbus
Power supply
Fieldbus
0
10
4
X
X
Data are read
Lire 4 mots à partir de l'adresse 10
0 0 1 0 0 1
"R"
"P"
irrelevant
irrelevant
RWM 1 RWM 2 RWM 3 RWM 4
Slave
0 0 10 11 1 0
1
DATA 2 (continuation)
DATA 3
DATA 4
Protection 2
1Waiting an instruction
Protection 1
PHASE 2Master
Power supply
Fieldbus
0
10
4
X
X
Waiting next data
Lire 4 mots à partir de l'adresse 10
0 0 1 0 0 1
"R"
"P"
irrelevant
Data
RWM 1 RWM 2 RWM 3 RWM 4
Slave
0 0 10 11 1 0
1
DATA 2 (suite)
DATA 3
DATA 4
Protection 4
1Releasing of dataProtection 3
Protection 1
Protection 4
irrelevant
PHASE 2Master
Power supply
Fieldbus
0
10
4
X
X
Data are read
Lire 4 mots à partir de l'adresse 10
0 0 1 0 0 1
"R"
"P"
irrelevant
RWM 1 RWM 2 RWM 3 RWM 4
Slave
0 0 10 11 1 0
1
DATA 4
Protection 4
1
Protection 3
Protection 1
Protection 4
irrelevant
1All data have been sentWaiting an instruction
PHASE 2Master
Power supply
Fieldbus
0
10
4
X
X
Command completed
Lire 4 mots à partir de l'adresse 10
0 0 1 0 0 1
"R"
"P"
irrelevant
RWM 1 RWM 2 RWM 3 RWM 4
Slave
0 0 10 11 1 0
DATA 4
Protection 4
Protection 3
Protection 1
Protection 4
irrelevant
1End of transaction
0
0
PHASE 2Master
©Contrinex 2013 - JDCPPT_LF_Fieldbus
Fieldbus
J.-D. Chatelain
End of this chapter