Has any one come across   GEC Industrial Controls Gemstart CCU (contactor
control module) ?
I "Inherited" a stalled project that uses these on about 30  3 phase motor
drives ranging from 40 HP to 250 HP.
The modules provide the operator interface for local and remote start/stop
control of the motors and monitor motor current via ct's for over current
tripping. It also has inputs for plant safety and sequencing / interlocking
with an RS485 communication buss between all CCU's and a couple of GEM 80
PLC.s and a separate RJ45 connector (6 conductor) for module programming and
apparently stand alone operation.  The modules have an Intel PB0C31BH
L6150048 Micro Processor and an Intel D27c256-2  windowed E-Prom (covered)
with LCD Alfa/ graphical display and 14 Led's for operator feedback.
The modules have never been put into use and have spent the last 10 or 12
years (some powerd up others not) in apalling conditions in a humid hot
tropical environment.
and now that I have been asked to get some of the equipment operating I find
that not one of the modules are apears to be functional with various error
messages on the LCD display including "UNPROG,  FAIL,  TRIP etc."
Sorry about the verbose intro.
My questions are:-
1 Can any one put me onto a source for information / documentation for these
modules.  (GEC Ind Controls apears to have been taken over by another
company who have thus far not responded to E-mail enquiries)
2 Are these Micro's or Eproms subject to spotaneous deprogramming or
programme coruption over time or environmetal conditions?
3 Any other thoughts.

Regards Bill

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