6/6/2008 5:21 PM | |
Joined: 12/20/2005 Last visit: 7/12/2023 Posts: 79 Rating: (4)
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Bey, The documentation for the TOT_IOSD function block says: The DEGRAD output indicates that a critical class 4 error exists in the system or the auto-shutdown latch has not been cleared. Repair action should be taken in a timely manner whenever critical errors are reported. If the system is degraded, redundancy has been lost and a failure on the remaining functional side of the system will cause a system failure. Whenever the system is degraded, the following actions take place: 1. The DEGRAD output is set to TRUE. 2. Error code SSC 27, EC 20 (FB logic has disabled system switchovers) is reported indicating the switchovers based on error counts are disabled. 3. Error code SSC 30, EC 06 (QUADLOG ACM/CCM Shut Down module outputs) is reported for SD controller if AUTOSD is enabled.
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6/6/2008 11:16 PM | |
Posts: 10 Rating: (0) |
RJP, It will be great if you confirm me the difference between the two bits., and all the possible scenarios. Thanks in advance. Bey. |
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