AC 800M Controller Firmware, versions 3.2/4, 3.2/7 - Backup PM864 erroneously stopped
Problem:
'AC 800M Controller Firmware, versions 3.2/4, 3.2/7 - Backup PM864 erroneously stopped' resolves the following:
Solution
A description of this resolution:
- The problem will be corrected in ControlIT for AC 800M/C version 3.2/8.
Workaround
The following procedure can be used if the problem rarely occurs:
Press the INIT push button on the stopped PM864. Observe the startup procedure and make sure that Dual mode is reached, that the Dual LED is lit on both processor units.
[ref 3BSE029566D0019 VASMASOITA0855 ]
'AC 800M Controller Firmware, versions 3.2/4, 3.2/7 - Backup PM864 erroneously stopped' resolves the following:
- AC 800M Controller Firmware, versions 3.2/4, 3.2/7 - Backup PM864 erroneously stopped
A backup PM864 CPU may erroneously be stopped.
The problem is only present when using PM864 in a redundant configuration and if TB840, connected to the PM864 optical modulebus, is of revision PR:J or later. The probability for the problem to happen increases with a lower number of used TB840.
The red 'F' LED on the backup CPU will be lit when the CPU is stopped. A system alarm will also automatically be generated.
The primary CPU will continue to control the process; but the CPU redundancy will be disabled.
Note that there are restrictions of the use of TB840 less than PR:J; see table 2 in release notes 3BSE 021 377D327.
- Article imported from the previous version of KnowledgeBank
Asked 13 years ago
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