Mitsubishi Electronics manual 160

11 TROUBLESHOOTING

MELSEC-Q

Special Relay List

(2) System information

Number	Name		Meaning	Explanation	Set by	Corresponding	Applicable
					(When Set)	ACPU	CPU
						M9
SM202	LED OFF	OFF	ON : LED OFF	• When this relay goes from OFF to ON, the LEDs	U	New
	command			corresponding to the individual bits at SD202 go off
SM203	STOP contact	STOP status		• Goes ON at STOP status	S (Status	M9042
					change)
SM204	PAUSE contact	PAUSE status		• Goes ON at PAUSE status	S (Status	M9041
					change)
SM205	STEP-RUN	STEP-RUN status		• Goes ON at STEP-RUN status	S (Status	M9054
	contact				change)
	PAUSE enable	OFF: PAUSE disabled		• PAUSE status is entered if this relay is ON when the	U	M9040
	coil	ON	: PAUSE enabled	remote PAUSE contact goes ON
SM206	Device test	OFF: Device test not yet		• Comes ON when the device test mode is executed on
	request		executed		S (Request)	New	Remote
	acceptance			GX Developer.
		ON	: Device test executed
	status
	Clock data set	OFF: Ignored		• When this relay goes from OFF to ON, clock data being
SM210				stored from SD210 to SD213 after execution of END	U	M9025
	request	ON	: Set request
				instruction for changed scan is written to the clock device.
SM211	Clock data error	OFF: No error		• ON when error is generated in clock data (SD210 to	S (Request)	M9026
		ON	: Error	SD213) value, and OFF if no error is detected.
	Clock data	OFF: Ignored		• Displays clock data as month, day, hour, minute, and			Q3A
SM212					U	M9027	Q4A
	display	ON : Display		second at the LED display at front of CPU module.
							Q4AR
SM213	Clock data read	OFF: Ignored		• When this relay is ON, clock data is read to SD210 to	U	M9028	+Rem
	request	ON : Read request		SD213 as BCD values.
				• Goes OFF when reset of the PLC No. 1 is canceled.
SM240	No. 1 CPU reset	OFF: PLC No. 1 reset cancel		• Comes ON when the PLC No. 1 is resetting (including
	flag	ON	: PLC No. 1 resetting	the case where the PLC is removed from the base unit).
				The other PLCs are also put in reset status.
				• Goes OFF when reset of the PLC No. 2 is canceled.
	No. 2 CPU reset	OFF: PLC No. 2 reset cancel		• Comes ON when the PLC No. 2 is resetting (including
SM241	flag	ON	: PLC No. 2 resetting	the case where the PLC is removed from the base unit).
				The other PLCs result in "MULTI CPU DOWN" (error
				code: 7000).
				• Goes OFF when reset of the PLC No. 3 is canceled.
	No. 3 CPU reset	OFF: PLC No. 3 reset cancel		• Comes ON when the PLC No. 3 is resetting (including
SM242	flag	ON	: PLC No. 3 resetting	the case where the PLC is removed from the base unit).
				The other PLCs result in "MULTI CPU DOWN" (error
				code: 7000).
				• Goes OFF when reset of the PLC No. 4 is canceled.	S (Status		QCPU
	No. 4 CPU reset	OFF: PLC No. 4 reset cancel		• Comes ON when the PLC No. 4 is resetting (including		New	function
					change)
SM243	flag	ON	: PLC No. 4 resetting	the case where the PLC is removed from the base unit).			Ver. B
				The other PLCs result in "MULTI CPU DOWN" (error
				code: 7000).
	No. 1 CPU error	OFF: PLC No. 1 normal		• Goes OFF when the PLC No. 1 is normal (including a
SM244		ON	: PLC No. 1 during stop	continuation error).
	flag
			error	• Comes ON when the PLC No. 1 is during a stop error.
	No. 2 CPU error	OFF: PLC No. 2 normal		• Goes OFF when the PLC No. 2 is normal (including a
SM245		ON	: PLC No. 2 during stop	continuation error).
	flag
			error	• Comes ON when the PLC No. 2 is during a stop error.
	No. 3 CPU error	OFF: PLC No. 3 normal		• Goes OFF when the PLC No. 3 is normal (including a
SM246		ON	: PLC No. 3 during stop	continuation error).
	flag
			error	• Comes ON when the PLC No. 3 is during a stop error.
	No. 4 CPU error	OFF: PLC No. 4 normal		• Goes OFF when the PLC No. 4 is normal (including a
SM247		ON	: PLC No. 4 during stop	continuation error).
	flag
			error	• Comes ON when the PLC No. 4 is during a stop error.

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