The AVTR block contains a number of conditions in the AVTR_ALERTS parameter. Only one of these AVTR_ALERTS conditions (Input Bad) propagates to the module level parameter MERROR. The following table lists the AVTR block alarm conditions.
Alarm Condition in AVTR_ALERTS |
Alert in Module Parameter MERROR |
|---|---|
Trip Active |
None |
Pre-Trip Active |
None |
Bypass Active |
None |
Startup Override Active |
None |
Deviation Limit Exceeded |
None |
Expiration Reminder |
None |
Bypassed Input Pre-Tripped |
None |
Bypassed Input Tripped |
None |
Input Bad |
IO Input Error |
Alarm conditions do not propagate when the REPORT_OPTS option Alarm conditions do not roll up to module level is selected. You might want to prevent propagation when the voting scheme is used to calculate a permissive rather than an interlock or trip condition.