Difference between revisions of "Solenoid Controls Redesign"
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* Address committee concerns | * Address committee concerns | ||
− | ** dual fast dump switches | + | ** dual fast dump switches |
− | + | ** UPS on control boards and contactor - stand-alone or counting house UPS | |
− | ** UPS on control boards and contactor | + | ** Failure Modes and Effects Analysis (FMEA) |
− | ** Failure Modes and Effects Analysis (FMEA) | + | |
** what else? | ** what else? | ||
Line 30: | Line 29: | ||
*** change connection scheme? | *** change connection scheme? | ||
*** change current limiting scheme? | *** change current limiting scheme? | ||
− | *** | + | *** requirements: fast vs slow, high vs low voltage, high vs low precision |
− | **** 10 kHz Dataforth modules? attenuators? | + | **** 10 kHz Dataforth modules? attenuators? isolation amplifiers? |
*** discuss with engineers | *** discuss with engineers | ||
*** use local measurement and current-loop to bring it down? | *** use local measurement and current-loop to bring it down? | ||
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* Danfysik power supply | * Danfysik power supply | ||
− | ** do we want to go to Ethernet based control? | + | ** do we want to go to Ethernet based control? use 435NBX? |
** choose ground fault detection mechanism | ** choose ground fault detection mechanism | ||
** lockbox for key | ** lockbox for key | ||
Line 51: | Line 50: | ||
* Quench detector | * Quench detector | ||
** can we get a good balance? | ** can we get a good balance? | ||
− | ** need sub-coil inductances in proper order | + | ** need sub-coil inductances in proper order - from Floyd Fall 2011 |
** do we need to design our own QD? | ** do we need to design our own QD? | ||
** can we get an FPGA module with A/D inputs off the shelf? | ** can we get an FPGA module with A/D inputs off the shelf? | ||
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*** get screens on the web | *** get screens on the web | ||
*** security? | *** security? | ||
+ | |||
+ | |||
+ | |||
** EWEB | ** EWEB | ||
*** create tag lists | *** create tag lists | ||
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* A-B PLC programming | * A-B PLC programming | ||
** consider existing program a prototype, rework for 15-20 year lifetime | ** consider existing program a prototype, rework for 15-20 year lifetime | ||
+ | ** send Josh to A-B training? | ||
** custom ("add-on") instructions to simplify everything | ** custom ("add-on") instructions to simplify everything | ||
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** to where | ** to where | ||
*** solenoid controls racks | *** solenoid controls racks | ||
− | *** target? | + | *** Danfysik control circuits and contactor? |
+ | *** target? other cryo and vacuum systems? | ||
** downtime due to power loss is deciding factor | ** downtime due to power loss is deciding factor | ||
Revision as of 08:53, 25 October 2011
To-do for solenoid controls redesign
- Address committee concerns
- dual fast dump switches
- UPS on control boards and contactor - stand-alone or counting house UPS
- Failure Modes and Effects Analysis (FMEA)
- what else?
- Infrastructure
- what goes into fourth rack besides computer?
- get fourth rack, install temporary wheels, bolt to other three racks
- Cryo system
- need specs, new channels, new functionality, etc.
- Wiring
- document trip chains
- label circuit breakers
- use Sequence-Of-Events (SOE) module, need additional wiring and relays
- prototype use of SOE module and relays in controls test stand
- cross-talk on voltage tap channels
- change connection scheme?
- change current limiting scheme?
- requirements: fast vs slow, high vs low voltage, high vs low precision
- 10 kHz Dataforth modules? attenuators? isolation amplifiers?
- discuss with engineers
- use local measurement and current-loop to bring it down?
- extend voltage measurement range using attenuators on separate Dataforth/PLC channels
- should we use high-bandwidth Dataforth modules?
- should we monitor all relays? circuit breakers?
- Danfysik power supply
- do we want to go to Ethernet based control? use 435NBX?
- choose ground fault detection mechanism
- lockbox for key
- lock/tag/try for dump resistor
- procedures to check for dump resistor integrity and diode polarity
- Quench detector
- can we get a good balance?
- need sub-coil inductances in proper order - from Floyd Fall 2011
- do we need to design our own QD?
- can we get an FPGA module with A/D inputs off the shelf?
- Instrumentation
- implement system to isolate fault detectors and determine time sequence of trips
- monitor circuit breakers?
- implement RS232 connections to all devices (e.g. vacuum gauges)
- Use RTI 435NBX instead of Point I/O serial modules? Need to get one and test.
- Replace shunt with different technology? Add amplifier between shunt and fast daq?
- VME-based fast DAQ
- NI vs VME?
- connection to PLC?
- connection to EPICS?
- A-B HMI improvements
- fault sequence screens
- Viewpoint
- get screens on the web
- security?
- EWEB
- create tag lists
- security?
- EWEB
- A-B PLC programming
- consider existing program a prototype, rework for 15-20 year lifetime
- send Josh to A-B training?
- custom ("add-on") instructions to simplify everything
- EPICS
- new channels
- UPS power
- to where
- solenoid controls racks
- Danfysik control circuits and contactor?
- target? other cryo and vacuum systems?
- downtime due to power loss is deciding factor
- to where
Notes
- max ramp rate in the hall is approximately 10V / 20H = 0.5 A/sec