Todd Moore for the DES Collaboration PS Talk June 13th , 2007 1

DES

DHE CRATE

SYSTEM MANAGEMENT

& CONTROL

Todd MooreUniversity of Illinois, at Urbana-Champaign

Todd Moore for the DES Collaboration PS Talk June 13th , 2007 2

Requirements

• Protection:– DES Monsoon boards.– CCDs– Power Supplies

• Monitoring:– DHE system voltages– DHE system temperature– Cooling fan speed– DHE crate system management power supply voltage

• Control– Power supply power-up/down sequencing– Temperature of DHE, via fan speed control (Optional)– Optically isolated ‘DHE system shutoff’ signal– Optically isolated ‘DHE system OK’ signal

Todd Moore for the DES Collaboration PS Talk June 13th , 2007 3

Requirements

• Communications (I2C/SMBus)– Optically isolated SDA (Serial Data Line) signal– Optically isolated SCL (Serial Clock Line) signal

• Form factor– 6Ux80mm transition board, to be installed in MCB

transition board slot

OR– Space left where Vicor supplies was mounted

• Power comes from either dedicated supply or cooling fan power supply, with volt regulators on trans card

Todd Moore for the DES Collaboration PS Talk June 13th , 2007 4

Functional Diagram

DHE POWER SUPPLY

COOLING FAN SENSOR

TEMPERATURESENSOR

MONITORINGLOGIC

ENABLE/DISABLE

MEASURINGLOGIC

DHE POWERINPUT

CONTROLLOGIC

COMMUNICATION

NATIONAL INSTRUMENT

SLOW CONTROLEQUIPMENT

MEMORY

CONTROL

POWER RAILS

* DHE SYSTEM OK

* COMMUNICATIONS

DATA

* OPTICALLY ISOLATED I/O

T.MooreUniversity of Illinois at

Urbana-Champaign6.7.07

DHE SYSTEM MANAGEMENT & CONTROL FUNCTIONAL DIAGRAM

* EMERGENCY SHUTOFF

DATA

COOLING FANS

FAN/DHE MAN. SYSTEM

POWER SUPPLY

Todd Moore for the DES Collaboration PS Talk June 13th , 2007 5

Functional Description

• Responds immediately to:– Overvoltage fault condition– Overtemp fault condition– Cooling fan speed fault condition– External ‘DHE system shutoff’ signal

• Telescope slow controls can only:– Interrogate DHE system management to find out the current

values – Execute a ‘DHE system shutoff’ signal to shut off all DHE

supplies but remain on for interrogation from telescope slow controls

– Reboot the DHE management system power supplies via turning off management system power supply

Todd Moore for the DES Collaboration PS Talk June 13th , 2007 6

System Reboot Process Flow

*System Reboot?

DHE Management

System is OFF

Turn On Monitoring Circuitry After

Management System Power Supply Has

Come Up

Is Cooling Fan Speed Fault

Condition Set?

Notify Telescope Control By

Releasing ‘DHE System OK’ Signal

Power-Up Rest Of DHE

Power Supplies

Fault Condition Process

Flow

YESNO

YESNO

Reboot DHE System Mgmt. Power Supply

DHE System Shutoff Mode

Todd Moore for the DES Collaboration PS Talk June 13th , 2007 7

Fault Condition Process Flow

Is Fault Condition Set?

Assert ‘DHE System OK’

Signal

Store All Monitored Values to Memory

Power Down All Supplies Except

System Management Power

Supply

Notify Telescope Control By

Releasing ‘DHE System OK’ Signal

Fault Condition Process

Flow

YESNO

Continue RunningNormally

DHE System Shutoff Mode

Todd Moore for the DES Collaboration PS Talk June 13th , 2007 8

Emergency & DHE System Shutoff Process Flow

Store All Monitored Values to Memory

Power Down All Supplies Except

System Management Power

Supply

Notify Telescope Control By

Releasing ‘DHE System OK’ Signal

Emergency Shutdown Signal From Telescope Slow Controls

Shut Off System Mgmt. Power

Supply?

Turn Off System Mgmt. Power

Supply

YESNO

DHE System Shutoff Mode

Reboot System Mgmt. Power

Supply?

Keep DHE System Power Supplies OFF

YESNO

Wait For Interrogation By Slow Controls

Reboot DHE System Mgmt. Power Supply

DHE System Shutoff Mode

Todd Moore for the DES Collaboration PS Talk June 13th , 2007 9

uController/Hardware Monitor Choice

• ADuC7019 – ADuC7028 Precision analog microcontroller– Analog I/O

• Multichannel, 12-bit, 1 MSPS ADC, up to 16 ADC channels• Up to 4 12-bit voltage output DACs• On-chip temperature sensor• Voltage comparator

– Microcontroller• ARM7TDMI core, 16 bit/32 bit RISC architecture• JTAG support

– Clocking options• Trimmed on-chip oscillator (±3%)• External watch crystal• External clock source up to 44 MHz• 41.78 MHz PLL with programmable divider

Todd Moore for the DES Collaboration PS Talk June 13th , 2007 10

uController/Hardware Monitor Choice

– Memory• 62 kB flash/EE memory, 8 kB SRAM

– On-chip peripherals• UART, 2 × I2C® and SPI® serial I/O

• Up to 40-pin GPIO port

• 4× general-purpose timers

• Wake-up and watchdog timers (WDT)

• Power supply monitor

• 3-phase, 16-bit PWM generator (for fan speed regulation)

• Programmable logic array (PLA)

• External memory interface, up to 512 kB

• We have an evaluation board

Todd Moore for the DES Collaboration PS Talk June 13th , 2007 11

Additional Choices

• External temperature monitor– NE1617A or ADT7461

• Uses on-board temp sensor & remote temp sensor, which can be a 2N3904/2N3906 transistor

• Uses SMBus for communication

– National Semi LM75

• Other uControllers/Hardware monitors– Actel Fusion mixed-signal FPGA– National Semi LM80