Mitsubishi Electronics manual 169

11 TROUBLESHOOTING

MELSEC-Q

Special Relay List (Continued)

ACPU	Special	Special							Applicable
Special	Relay after	Relay for	Name		Meaning	Details
									CPU
Relay	Conversion	Modification
M9006	SM1006			OFF: Normal		• Turned on when battery voltage reduces to less than
			Battery low			specified. Turned off when battery voltage becomes
				ON : Battery low
						normal.
M9007	SM1007		Battery low latch	OFF: Normal		• Turned on when battery voltage reduces to less than
				ON : Battery low		specified. Remains on if battery voltage becomes normal.
M9008	SM1008	SM1	Self-diagnosis	OFF: No error		• Turned on when error is found as a result of self-
			error	ON : Error		diagnosis.
M9009	SM1009	SM62	Annunciator	OFF: No F number detected		• Turned on when OUT F of SET F instruction is executed.
			detection	ON : F number detected		Switched off when SD1124 data is zeroed.
			Operation error	OFF: No error		• Turned on when operation error occurs during execution
M9011	SM1011	SM56				of application instruction. Remains on if normal status is
			flag	ON : Error
						restored.
M9012	SM1012	SM700	Carry flag	OFF: Carry OFF		• Carry flag used in application instruction.
				ON : Carry ON
			Data memory	OFF: lgnored		• Clears the data memory including the latch range (other
M9016	SM1016					than special relays and special registers) in remote run
			clear flag	ON : Output claered
						mode from computer, etc. when SM1016 is on.
			Data memory	OFF: lgnored		• Clears the unlatched data memory (other than special
M9017	SM1017					relays and registers) in remote run mode from computer,
			clear flag	ON : Output claered
						etc. when SM1017 is on.
M9020	SM1020		User timing clock
			No.0			• Relay which repeats on/off at intervals of predetermined
			User timing clock	n2	n2
M9021	SM1021					scan.
			No.1
				scan	scan	• When power is turned on or reset is per-formed, the clock
			User timing clock
M9022	SM1022					starts with off.
			No.2
					n1	• Set the intervals of on/off by	DUTY	instruction.
			User timing clock
M9023	SM1023				scan	DUTY	n1	n2 M9020
			No.3
M9024	SM1024		User timing clock
			No.4
M9025	SM1025		Clock data set	OFF: Ignored		• Writes clock data from SD1025 to SD1028 to the clock
						element after the END instruction is executed during the
			request	ON : Set request present used
						scan in which SM1025 has changed from off to on.
M9026	SM1026		Clock data error	OFF: No error		• Switched on by clock data (SD1025 to SD1028) error
				ON : Error
M9027	SM1027		Clock data	OFF: Ignored		• Clock data is read from SD1025 to SD1028 and month,
						day, hour, minute and minute are indicated on the CPU
			display	ON : Display
						front LED display.
M9028	SM1028		Clock data read	OFF: Ignored		• Reads clock data to SD1025 to SD1028 in BCD when
			request	ON : Read request		SD1028 is on.
						• The SM1029 relay is turned on using a sequence
						program to process all data communication requests
			Batch processing	OFF: Batch processing not		accepted during one scan in the END processing of that
						scan.
			of data	conducted
M9029	SM1029					• The batch processing of the data communication
			communications	ON : Batch processing
						requests can be turned on and off during running.
			requests	conducted
						• The default is OFF (processed one at a time for each
						END processing in the order in which data
						communication requests are accepted).
				0.05	0.05
M9030	SM1030		0.1 second clock	seconds seconds
				0.1	0.1	• 0.1 second, 0.2 second, 1 second and 2 second, clocks
M9031	SM1031		0.2 second clock	seconds		are generated.
					seconds	• Not turned on or off per scan but turned on and off even
				0.5	0.5	during scan if corresponding time has elapsed.
M9032	SM1032		1 second clock	seconds		• Starts with off when PLC power supply is turned on or
					seconds	CPU module reset is performed.
				1	1
M9033	SM1033		2 second clock	seconds
					seconds
						• Alternates between ON and OFF according to the
			2n minute clock	n		seconds specified at SD414. (Default: n = 30)
					n	• Not turned on or off per scan but turned on and off even
M9034	SM1034		(1 minute	seconds
						during scan if corresponding time has elapsed.
			clock)		seconds
						• Starts with off when PLC power supply is turned on or
						CPU module reset is performed..

: 1 minute clock indicates the name of the special relay (M9034) of the ACPU.

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