GE 90-30/20/Micro manual PLC CPU System Software Failure

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PLC CPU System Software Failure

Faults in the Fault Group PLC CPU System Software Failure are generated by the operating software of the Series 90-30, 90-20 or Micro PLC CPU. They occur at many different points of system operation. When a Fatal fault occurs, the PLC CPU immediately transitions into a special ERROR SWEEP mode. No activity is permitted when the PLC is in this mode. The only way to clear this condition is to cycle power on the PLC. The fault action for this group is Fatal.

Error Code:	1 through B
Name:	User Memory Could Not Be Allocated
Description:	The PLC operating software (memory manager) generates these errors when
	software requests the memory manager to allocate or deallocate a block or blocks
	of memory from user RAM that are not legal. These errors should not occur in a
	production system.

Correction: Display the PLC fault table on the programmer. Contact GE Fanuc PLC Field

Service, giving them all the information contained in the fault entry.

Error Code:	D
Name:	System Memory Unavailable
Description:	The PLC operating software (I/O Scanner) generates this error when its request
	for a block of system memory is denied by the memory manager because no
	memory is available from the system memory heap. It is Informational if the error
	occurs during the execution of a DO I/O function block. It is Fatal if it occurs
	during power-up initialization or autoconfiguration.

Correction: Display the PLC fault table on the programmer. Contact GE Fanuc PLC Field

Service, giving them all the information contained in the fault entry.

Error Code:	E
Name:	System Memory Could Not Be Freed
Description:	The PLC operating software (I/O Scanner) generates this error when it requests
	the memory manager to deallocate a block of system memory
	and the deallocation fails. This error can only occur during the execution
	of a DO I/O function block.
Correction:	(1) Display the PLC fault table on the programmer. Contact GE Fanuc
	PLC Field Service, giving them all the information contained in the
	fault entry.

(2)Perform the corrections for corrupted memory.

Error Code:	10
Name:	Invalid Scan Request of the I/O Scanner
Description:	The PLC operating software (I/O Scanner) generates this error when the operating
	system or DO I/O function block scan requests neither a full nor a partial scan of
	the I/O. This should not occur in a production system.

Correction: Display the PLC fault table on the programmer. Contact GE Fanuc PLC Field

Service, giving them all the information contained in the fault entry.

Error Code:	13
Name:	PLC Operating Software Error
Description:	The PLC operating software generates this error when certain PLC
	operating software problems occur. This error should not occur in a
	production system.
Correction:	(1) Display the PLC fault table on the programmer. Contact GE Fanuc
	PLC Field Service, giving them all the information contained in the
	fault entry.

(2)Perform the corrections for corrupted memory.

3-14 Series 90-30/20/Micro Programmable Controllers Reference Manual–September 1998 GFK-0467K