Mitsubishi Electronics 700 Series, FR-A700 How to Read the Error Code, Error Error Name Code

How to Read the Error Code

When the built-in PLC function is in the RUN status or if an alarm occurs during RUN, the self-diagnostic function displays the error and stores the error code and error step into the special registers. This chapter describes the error definitions and corrective actions.

4.1 How to Read the Error Code

When an error has occurred, the error code can be read with the peripheral device. For the operation method, refer to the operating manual of the peripheral device.

The following table indicates the error names, error codes, definitions, causes and corrective actions.

The error code and error step are stored into the following special registers. Error code................. D9008

Error step.................. D9010, D9011

Table 4.1 Error Code List

	Error
Error Name	Code	Status	Definition and Cause	Corrective Action
	(D9008)
“INSTRCT			The instruction code that
CODE ERR.”			cannot be decoded is	Read the error step using
[Checked at	10	Stop	included in the program.	GX Developer, and correct
instruction			• The memory contents	that step in the program.
execution]			changed for some reason.
“PARAMETER			(1) Write to the CPU was
ERROR”			performed after the
[Checked at			capacity larger than the	Check the memory capacity
power-on or			memory capacity of the
				of the CPU with the
STOP to RUN]			CPU was set using GX
	11	Stop		memory capacity set using
			Developer.
				GX Developer, and re-set
			(2) The parameter data of the
				using GX Developer.
			CPU memory changed
			due to noise or memory
			loading fault.
“WDT ERROR”			The scan time exceeds the	Calculate/check the user
[Checked at	22	Stop	watchdog error monitor time.
END processing			• The user program scan	program scan time and
				reduce the scan time.
execution]			time has increased.
“END NOT			(1) The END instruction has	Reset and RUN again. If
EXECUTE”			been read as another	the same error appears
[Checked at			instruction code due to	again, the cause is a CPU
END instruction	24	Stop	noise, etc.	hardware fault. Consult the
execution]l			(2) The END instruction has	Mitsubishi representative.
			changed into another
			instruction code for some
			reason.

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