Communications Error; Pressure Board - ABB PGC2000 Operation And Service Manual

Communications Error

When "Communications Error:" appears as the main alarm, one or more communications alarms
appears below the main alarm. Typical communication alarms and their description are:
* Block not transmitted—activates when a VistaNET message is passed to the Communication PCB
and no acknowledgement is received.
* Block dropped—activates when VistaNET messages are being received from the Communication
PCB faster than they can be processed.
* No port to receive—activates when there is not a port in the SBC software configured to receive the
message.
* Time out—activates when a VistaNET message was not received or transmitted in the time allowed.
* Unfinished multi-block—activates when an incomplete multiblock message is received.
* Unsolicited reply—activates when a response message is received and there is no reply pending.
* Unreachable destination—activates when a message that requires a response has a return address
that the GCC could not route the message to.
* Socket purged—activates when a VistaNET message is received in which there is no waiting task.

Pressure Board

When "Pressure Board:" appears as the main alarm, one or more pressure alarms appears below the
main alarm. Pressure alarms are of two types, overall alarms and zone-specific alarms, with the
zone-specific alarms subordinate to the overall alarms. Typical overall pressure alarms and their
descriptions are:
* ROM Checksum—activates when the EPC Multibus PCB has failed.
* Communications—activates when communications between the SBC PCB and the EPC Multibus
PCB have failed.
* EPC Module Temperature High—activates when the temperature in the EPC Module exceeds 68.2°
C.
* EPC Module Temperature Low—activates when the temperature in the EPC Module goes below
59.9° C.
* Zone Specific—activates when one of the zone specific alarms is activated.
If the "*Zone Specific" subordinate alarm appears, at least two additional lines appear below that.
The first line identifies which zone produced the alarm and the second line identifies the specific
alarm condition. Typical zone specific alarms and their descriptions are:
* Zone Checksum—activates when there is an EEPROM problem.
* Out of Control—activates when the ramp rate settings exceed an acceptable range or the analyzer
is unable to maintain set point.
* Zero Failed—activates when the Zero pressure is not present, or the switch has not been
depressed.
6-36 2000-OSM, F1