Mitsubishi Electronics manual 177

11 TROUBLESHOOTING

MELSEC-Q

Special Relay List

(11)For redundant system (Other system CPU information 1) for Q4AR only

SM1600 to SM1650 only valid for the CPU redundant system backup mode, so they cannot be refreshed during the separate mode. Either the backup mode or the separate mode is valid for the SM4651 to SM1699. SM1600 to SM1699 are all turned off for standalone system.

				Set by	ACPU		Applicable
Number	Name	Meaning	Explanation	(When Set)	M9
							CPU
						2
		OFF: No error	• Turns on if a error occurs in the diagnosis results.	S
SM1600	Diagnosis error		(Including external diagnosis)		New
		ON : Error		(Each END)
			• Remains on even if returns to normal thereafter.
		OFF: No self	• Turns on when an error occurs in the self-diagnosis
		diagnosis error		S
SM1601	Self diagnosis error		results.		New
		ON : Self diagnosis		(Each END)
			• Remains on even if returns to normal thereafter.
		error
		OFF: No error
	Error common	common	• Turns on when there is error common information and the	S
SM1605		information			New
	information		SM1600 is on.	(Each END)
		ON : Error common
		information					Q4AR
		OFF: No error
	Error individual	individual	• Turns on when there is error individual information and the	S
SM1616		information			New
	information		SM1600 is on.	(Each END)
		ON : Error individual
		information
SM1653	STOP contact	STOP status	• Turns on when in the STOP status.	S	New
				(Each END)
SM1654	PAUSE contact	PAUSE status	• Turns on when in the PAUSE status.	S	New
				(Each END)
SM1655	STEP-RUN contact	STEP-RUN status	• Turns on when in the STEP-RUN status.	S	New
				(Each END)

1 Stores other system CPU diagnostic information and system information.

2 This shows the special relay(SM) for the host system CPU.

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