Mitsubishi Electronics Q172HCPU, Q173HCPU APPENDICES, Table 2.1 Special relay list

APPENDICES

Table 2.1 Special relay list

No.	Name		Meaning	Details	Set by	Remark
					(When set)
		OFF	: Normal	• Turn on when there is one or more output modules control
M9000	Fuse blown detection	ON	: Fuse blown module	of self CPU which fuse has been blown.
			detected	Remains on if normal status is restored.
				• Turn on if a momentary power interruption of less than
		OFF	: AC/DC DOWN	20[ms] occurred during use of the AC power supply
M9005	AC/DC DOWN detection		not detected	module, and reset by turning power off to on.
		ON	: AC/DC DOWN	• Turn on if a momentary power interruption of less than
			detected	10[ms] occurred during use of the DC power supply
				module, and reset by turning power off to on.
				• Turned on when the voltage of the external battery
				reduces to less than specified value. Turn off when the
M9006	Battery low	OFF	: Normal	voltage of the external battery becomes normal.
		ON	: Battery low	• Synchronizes with "BAT. LED"	S(Occur an error)
				• Check the voltage of the external battery, only when it is
				set with "external battery use" by system setting.
				• Turn on when the voltage of the external battery reduces
				to less than specified value. Remains on if normal status
M9007	Battery low latch	OFF	: Normal	is restored.
		ON	: Battery low	• Synchronizes with "BAT. LED"
				• Check the voltage of the external battery, only when it is
				set with "external battery use" by system setting.
M9008	Self-diagnostic error	OFF	: No error	• Turn on when error is found as a result of self-diagnosis.
		ON	: Error	Remains on if normal status is restored.
M9010	Diagnostic error	OFF	: No error	• Turn on when error is found as a result of diagnosis.
		ON	: Error	Remains on if normal status is restored.
		OFF	: Ignored	• Write clock data stored in D9025 to D9028 to the clock
M9025	Clock data set request	ON	: Set request present		U
			used	element when M9025 has changed from off to on.
M9026	Clock data error	OFF	: No error	• Turn on by clock data (D9025 to D9028) error.	S(Request)
		ON	: Error
M9028	Clock data read request	OFF	: Ignored	• Read clock data from D9025 to D9028 in BCD when	U
		ON	: Read request	M9028 is on.
M9036	Always ON	ON		• Turn on without regard to position of RUN/STOP switch
		OFF		on.
					S(Main processing)
M9037	Always OFF	ON		• Turn off without regard to position of RUN/STOP switch
		OFF		on.
M9060	Error reset	OFF	ON : Error reset	• A release of the error is executed.	U
				• Turn on when a "watchdog timer error" is detected by the
				Motion CPU self-diagnosis function.
M9073	PCPU WDT error flag	ON	: Abnormal	When the Motion CPU detects a WDT error, it executes an	S(Occur an error)
		OFF	: Normal	immediate stop without deceleration of the operating axes.
				• The error cause is stored in the "Motion CPU WDT error
				cause (D9184)".
		ON	: PCPU READY	• When the PLC ready flag (M2000) turn off to on, the
				fixed parameters, servo parameters and limit switch
	PCPU READY complete		completion
M9074				output data, etc., are checked, and if no error is detected	S(Request)
	flag	OFF	: PCPU READY
			uncompletion	this flag turns on.
				• Turn off when the PLC ready flag (M2000) turns off.
				• This flag status indicates whether a TEST mode
		ON	: TEST mode is in	established from a peripheral device is currently in
M9075	Test mode ON flag		effect.	effect.	S(Request)
		OFF	: TEST mode is not in	• If the TEST mode is not established in response to a
			effect.	TEST mode request from a peripheral device, the
				"TEST mode request error flag (M9078)" will turn on.
M9076	External forced stop	ON	: Forced stop OFF	• This flag status indicate whether the forced stop.	S(Operation cycle)
	input flag	OFF	: Forced stop ON

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