State Industries GFK-0827 manual Configuration of Fault Actions

4

E. Role switches are allowed on both units.

Primary Unit		Secondary Unit
Backup		Active (see NOTE below)
RUN/ENABLED		RUN/ENABLED
X OK		X OK
X	LOC_RDY	X	LOC_RDY
	LOC_ACT	X	LOC_ACT
X	REM_RDY	X	REM_RDY
X	REM_ACT		REM_ACT

F.Role switches are not allowed on either unit.

Primary Unit		Secondary Unit
Backup		Active (see NOTE below)
RUN/DISABLED		RUN/ENABLED
X OK		X OK
	LOC_RDY	X	LOC_RDY
	LOC_ACT	X	LOC_ACT
X	REM_RDY		REM_RDY
X	REM_ACT		REM_ACT

G. Role switches allowed on both units.

Primary Unit	Secondary Unit
Backup	Active (see NOTE below)
RUN/DISABLED	RUN/DISABLED
X OK	X OK
LOC_RDY	LOC_RDY
LOC_ACT	X LOC_ACT
REM_RDY	REM_RDY
X REM_ACT	REM_ACT

H.The following situation is not valid. If detected, the units will switch roles automatically and behave as in (C) above.

Primary Unit	Secondary Unit
Backup	Active (see NOTE below)
RUN/ENABLED	RUN/DISABLED

Note

* Secondary unit active is not a recommended mode of operation.

Configuration of Fault Actions

With the Redundancy CPU, you cannot select to configure certain faults to be FATAL (causing the CPU to STOP). Whenever the system is in redundancy mode with a backup unit available, the decision as to which faults are FATAL and therefore will cause a switch to the backup CPU are made by the operating system and are not configurable.

GFK-0827 Chapter 4 Operation 67