Solenoid Controls Redesign
From GlueXWiki
To-do for solenoid controls redesign
- Wiring
- document trip chains
- label circuit breakers
- Danfysik power supply
- do we want to go to Ethernet based control?
- choose ground fault detection mechanism
- Quench detector
- can we get a good balance?
- do we to design our own QD?
- Instrumentation
- implement system to isolate fault detectors and determine time sequence of trips
- monitor circuit breakers
- VME-based fast DAQ
- NI vs VME?
- A-B HMI improvements
- fault sequence screens
- A-B PLC program improvements
- custom instructions to simplify everything
- EPICS
- new channels
- Viewpoint
- test
- EWEB
- use just for back-door access
- security?
Notes
- note that max ramp rate in the hall is approximately 10V / 20H = 0.5 A/sec
- need travelers for coil installation.
- should we install a UPS on the Danfysik contactor and control boards?
- should we install a second contactor in the Danfysik power supply?
- do we need additional valves, check valves, bypasses, whatever?
- do we need Dataforth voltage attenuators on coil tap channels?
- do we need active isolation of coil tap channels, etc?
- should we monitor all circuit breakers?
- should we monitor all relays?
- what is the effect of B field on sensors/relays? should some instrumentation be relocated?
- do we need new flow sensors, or should they be relocated?
- lock box for power supply key
- more ethernet power strips
- use custom ("add-on") instructions to simplify PLC code
- install permanent VME-based fast DAQ
- logarithmic or equivalent current and voltage measurements
- isolate coil taps
- sequence of events module
- attenuators on Dataforth modules
- check dump resistor and diode in checklist, interlocks
- backup in case dump resistor/diode broken
- dump at low current to check dump system in checkout list
- logarithmic amps on voltages to get full range
- manual check of resistor/diode connection and polarity
- improve checklists and test plan
- resistor/diode checks in maintenance OSP and/or operations OSP