GE 90-70 manual With redundancy in other fault groups

5

Error
Code		Message			Fault Description			Corrective Action
9	Primary and Secondary				The local unit cannot be placed in RUN		Modify the configuration or terminate
	Units are Incompatible				mode when its redundancy configuration is		the C debugger session.
					incompatible with the remote unit. This
					error is logged when (1) Store of an
					incompatible configuration is attempted and
					(2) attempting to synchronize with an
					incompatible configuration. This error is
					also logged when the local unit and/or the
					remote unit has a C debugger session active
					and the units are attempting to synchronize.
10	CPU to CPU				Synchronization protocol has been violated.		If this fault is also accompanied by an
	communications						RCM failed fault, replace the failed RCM:
	terminated						otherwise power cycle the CPU or CPUs.
11	Redundant Link has timed				The RCM has timed out while waiting on		Power cycle the back-up CPU (CPU not
	out				communications from the other unit.		controlling the process); increase the fail
							wait time.
12	Units Are Not Fully				Due to actions taken by the user, the two		Enable the data transfer copy on the
	Synchronized				units in a CPU redundant system are not		backup unit
					fully synchronized. This means the backup
					unit is not executing with the same inputs
					and/or outputs as the active unit while the
					units are synchronized due to data transfers
					being disabled.
>12	CPU Redundancy Status				A change in the status of the system has		Corrective action to be taken depends on
	has Changed				occurred.		the error code.
			The following table lists messages, descriptions, and corrective actions for error codes associated
			with redundancy in other fault groups.
Group			Error
			Code	Message		Fault Description		Corrective Action
Loss of			57	Redundant link hard		The RCM has been faulted due to an		Power cycle the rack with the
Option				failure occurred.		error while accessing memory.		faulted RCM. If the RCM's
Module								BOARD OK LED is on, replace
								the cable between the RCM and
								the BTM. If the RCM's BOARD
								OK LED is off, replace the RCM.
PLC Software			148	Units contain		The firmware in the redundant CPUs		Upgrade the CPUs so that they
				mismatched firmware;		has different revision levels. Having		have the same revision of
				update recommended.		different revisions of firmware in the		firmware according to the
						CPUs is intended for short-term		firmware upgrade procedure.
						synchronization only as some change in
						the behavior of the system may be
						experienced when mixing revisions.

5-4 Series 90™-70 Enhanced Hot Standby CPU Redundancy User's Guide – May 2000 GFK-1527A