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Using a Quantum 984 HSBY System
840 USE 106 00 January 2003 95
Hot Standby Status Register for Configuration Extension
Status Register
for Configuration
extension
Note: Bits 1 and 2 are used only in conjunction with a configuration extension.
This PLC in OFFLINE mode = 0 1
This PLC running in primary mode = 1 0
This PLC running in standby mode = 1 1
PLCs have matching logic = 0
PLCs do not have matching logic = 1
The other PLC in OFFLINE mode = 0 1
The other PLC running in primary mode = 1 0
The other PLC running in standby mode = 1 1
This PLC’s switch sat to A = 0
This PLC’s switch sat to B = 1
An interface error has been detected = 1
The CHS interface is healthy = 0
Hot standby capability has not been activated = 0
Hot standby is active = 1