State Industries GFK-0827 manual PLC Fault Table, Fault Zoom Help Text for Redundancy Error Codes

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PLC Fault Table

The following table lists fault zoom Help text and messages for error codes associated with the redundancy fault group.

Table 8. Fault Zoom Help Text for Redundancy Error Codes

Error
Code	Message	FaultDescription	Corrective Action
1	Primary Unit is Active and	The primary and secondary units have	None required.
	Secondary Unit is Backup.	switched roles.
2	Secondary Unit is Active and	The secondary and primary units have	None required.
	Primary Unit is Backup.	switched roles.
3	Primary Unit is Active;	The primary unit has transitioned to RUN	Secondary unit MUST be placed in RUN mode with a
	No Backup Unit Available.	mode and is running as a stand-alone unit.	comparable configuration
			in order to have a synchronized system.
4	Secondary Unit is Active;	The secondary unit has transitioned to RUN	Primary unit MUST be placed in RUN mode with a
	No Backup Unit Available.	mode and is running as a stand-alone unit.	comparable configuration
			in order to have a synchronized system.
5	Primary Unit Has Failed;	Primary unit has recorded a fatal fault, has	If primary unit has also logged the fault ºSecondary
	Secondary Unit is Active w/o	been powered down, or has lost	Unit Has Failed: Primary Unit is Activew/oBackupº,
	Backup.	ability to communicate with the secondary	then communications has been broken between the
		unit while acting as the active or backup unit.	two units and must be repaired. If a fatal fault has
		Secondary unit will continue running as a	been logged in the primary unit, the indicated fault
		stand-alone unit.	must be repaired. Power may have to be cycled on one
			of the units in order to re-establish communications
			and return to a synchronized system.
6	Secondary Unit Has Failed;	Secondary unit has recorded a fatal fault, has	If secondary unit has also logged the fault ºPrimary
	Primary Unit is Active w/o	been powered down, or has lost ability to	Unit Has Failed: Secondary Unit is Activew/oBackupº,
	Backup.	communicate with the primary unit while	then communications has been broken between the
		acting as the active or backup unit. The pri-	two units and must be repaired. If a fatal fault has
		mary unit will continue running as a stand-	been logged in the secondary unit, the indicated fault
		alone unit.	must be repaired. Power may have to be cycled on one
			of the units in order to re-establish communications
			and return to a synchronized system.
7	Synchronization Failure; Both	A communications failure between	One of the units should be power cycled to return to a
	Units are Active.	the two units has caused each unit to become	synchronized system. NOTE: The Genius blocks will
		stand-alone units. Communications has since	respond to the unit that is using Serial Bus Address 31.
		been restored.
8	Unable to Switch Redundancy	An attempt to switch redundancy roles was	None required.
	Roles	made when it was not possible to perform the
		switch.
9	Primary and Secondary Units	The local unit cannot be placed in RUN mode	Modify the configuration.
	areIncompatible	when its redundancy configuration is incom-
		patible with the remote unit. This error is
		logged when (1) Store of an incompatible con-
		fig is attempted and (2) going to RUN with an
		incompatible config.
10	CPU to CPU communications	Synchronization protocol has been violated.	If this fault is also accompanied by an RCM failed fault,
	terminated		replace the failed RCM: otherwise power cycle the CPU
			or CPUs.
11	Redundant Link has timed out	The RCM has timed out while waiting on com-	Power cycle the back-up CPU (CPU not
		munications from the other unit.	controlling the process); increase the fail wait time.
>11	CPU Redundancy Status has	A change in the status of the system has oc-	Corrective action to be taken depends on the error
	Changed	curred. Press Ctrl-F to determine the error	code.
		code.
57	Redundant link hard	The RCM has been faulted due to an error	Power cycle the rack with the faulted RCM. If the
	failure occurred.	while accessing memory.	RCM's BOARD OK LED is on, replace the cable be-
			tween the RCM and the BTM. If the RCM's BOARD
			OK LED is off, replace the RCM.

74 Series 90-70 Hot Standby CPU Redundancy User's Guide ± December 1993 GFK-0827