Difference between revisions of "For the second coil"

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** minimize summed coil voltage readouts, do most sums in PLC - '''done'''
 
** minimize summed coil voltage readouts, do most sums in PLC - '''done'''
 
** add separate readouts of splice and vapor-cooled lead voltages - '''done'''
 
** add separate readouts of splice and vapor-cooled lead voltages - '''done'''
−
** combine splice and lead into one hardware quench/overvoltage protection channel using Newport controller
+
** combine splice and lead into one hardware quench/overvoltage protection channel using Newport controller - '''done'''
 
** match and balance all current-limiting resistors, go back to original 100k Ohm matched resistors - '''done'''
 
** match and balance all current-limiting resistors, go back to original 100k Ohm matched resistors - '''done'''
 
** read out voltage taps for quench detection and DAQ using separate resistor chain - '''done'''
 
** read out voltage taps for quench detection and DAQ using separate resistor chain - '''done'''
−
** update wiring diagrams to "as built"
+
** update wiring diagrams to "as built" - '''done'''
 
** get diagrams and spec sheets to Fernando - '''done'''
 
** get diagrams and spec sheets to Fernando - '''done'''
 
** understand signal clipping and interaction between readout modules, test and replace if necessary
 
** understand signal clipping and interaction between readout modules, test and replace if necessary
Line 20: Line 20:
 
** fix slow dump - '''done'''
 
** fix slow dump - '''done'''
 
** implement ground fault detection compatible with quench detector
 
** implement ground fault detection compatible with quench detector
−
** make more copies of full Danfysik power supply manual (get from Steve L)
+
** make more copies of full Danfysik power supply manual (get from Steve L) - '''done'''
  
 
* Danfysik quench detector
 
* Danfysik quench detector
 
** match and balance resistors - '''done'''
 
** match and balance resistors - '''done'''
 
** install test points for gain/offset tuning - '''done'''
 
** install test points for gain/offset tuning - '''done'''
−
** install pots for balance
+
** install pots for balance - '''done'''
−
** install bias circuit if unable to eliminate Danfysik DC offset - '''not needed'''
+
** install bias circuit if unable to eliminate Danfysik DC offset - '''done'''
−
*** doesn't appear to be needed since offset problem solved
+
*** doesn't appear to be needed since offset problem solved, but we did it for one channel anyway
  
 
* Dataforth system
 
* Dataforth system
Line 43: Line 43:
 
* A-B HMI improvements
 
* A-B HMI improvements
 
** get additional HMI client license from Steve
 
** get additional HMI client license from Steve
−
** get second HMI computer working
+
** get second HMI computer working - '''done'''
 
** implement A-B license server - '''done'''
 
** implement A-B license server - '''done'''
 
** get A-B IIS file server system working - '''done'''
 
** get A-B IIS file server system working - '''done'''
Line 53: Line 53:
  
 
* A-B PLC program improvements
 
* A-B PLC program improvements
−
** new channels
+
** new channels - '''done'''
 
** simplify many operations
 
** simplify many operations
 
** improve PLC early problem detection
 
** improve PLC early problem detection
Line 59: Line 59:
 
** implement early-warning quench/overvoltage detection in PLC
 
** implement early-warning quench/overvoltage detection in PLC
 
** use custom instructions to simplify code
 
** use custom instructions to simplify code
 +
** try A-B alarm and logging systems
  
 
* EPICS
 
* EPICS

Revision as of 09:51, 10 February 2011

To-do list

  • Wiring
    • remove jumper box and cables and bring to F117 for rework - done
    • remove current-limiting resistor boxes, bring to F117 for rework - done
    • minimize summed coil voltage readouts, do most sums in PLC - done
    • add separate readouts of splice and vapor-cooled lead voltages - done
    • combine splice and lead into one hardware quench/overvoltage protection channel using Newport controller - done
    • match and balance all current-limiting resistors, go back to original 100k Ohm matched resistors - done
    • read out voltage taps for quench detection and DAQ using separate resistor chain - done
    • update wiring diagrams to "as built" - done
    • get diagrams and spec sheets to Fernando - done
    • understand signal clipping and interaction between readout modules, test and replace if necessary
    • minimize noise
  • Danfysik power supply
    • understand ramp-down mechanism - done
    • measure fast dump resistors in power supply - done
    • eliminate 2V DC offset - done
    • fix slow dump - done
    • implement ground fault detection compatible with quench detector
    • make more copies of full Danfysik power supply manual (get from Steve L) - done
  • Danfysik quench detector
    • match and balance resistors - done
    • install test points for gain/offset tuning - done
    • install pots for balance - done
    • install bias circuit if unable to eliminate Danfysik DC offset - done
      • doesn't appear to be needed since offset problem solved, but we did it for one channel anyway
  • Dataforth system
    • Correct for 2M Ohm internal impedance and 200k Ohm resistors in voltage tap readouts - done
  • USB device
    • install voltage dividers to extend voltage range
    • add resistors to Zener protection circuit
  • automated elog entries
    • automatically dump screens to files
    • create perl script
    • create cron job
  • A-B HMI improvements
    • get additional HMI client license from Steve
    • get second HMI computer working - done
    • implement A-B license server - done
    • get A-B IIS file server system working - done
    • upgrade to 100 screen license if needed
    • change HMI database to MySql - done
    • create more pre-defined trend plots
    • simplify existing screens
    • better indication of what caused fast/slow dump
  • A-B PLC program improvements
    • new channels - done
    • simplify many operations
    • improve PLC early problem detection
    • improve PLC cryo control under varying CTF operating conditions
    • implement early-warning quench/overvoltage detection in PLC
    • use custom instructions to simplify code
    • try A-B alarm and logging systems
  • EPICS
    • serve out all PLC channels to CA
      • need list from Josh
    • implement guard shack notification for IOC hang/crash


For the hall

  • note that max ramp rate in the hall is approximately 10V / 20H = 0.5 A/sec
  • should we install a UPS on the Danfysik contactor and control boards?
  • 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?


Basic questions

  • lag between field and current...are there turn-to-turn shorts in coil 1?
    • maybe short, maybe eddy currents...
  • will we open up coil 3 and/or coil 4?
  • do we want an independent review of our fast (and slow) dump strategy and system?
  • document our experience!
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