GE GFK-0787B Noise Reduction Machine User Manual


 
5
5-27GFK-0787B Chapter 5 Diagnostics
Short circuit fault
Overtemperature fault
Overload fault
Discrepancy
The blocks each report the discrepancy status for the data from each PLC, together
with the PLC online/offline status.
All PLCs periodically monitor all blocks’ discrepancy status. Three discrepancy bits
are maintained for each output; one for each of the PLCs. One of the bits is set if a
block reports a discrepancy for any of its outputs.
For non-redundant outputs, the single fault contact is associated with the physical
output. The fault contact is set under the following conditions:
Discrepancy fault
Genius faults including Loss of Block, and the following additional faults:
Failed switch: Occurs if the actual output state differs from the commanded
state.
No Load fault: For 16-circuit blocks only, individual outputs can be
configured to enable or disable reporting No-load faults. The minimum load
current required to assure proper no-load reporting is 50mA (not 100mA, as
it would be for a block in a GMR group).
For a single block, no-load fault reports for block outputs that are ON may
be generated at any time except during a Pulse Test. For block outputs that
are OFF, no-load fault reports are generated during a Pulse Test.
Short Circuit fault.
Overtemperature fault
Overload fault