Mitsubishi Electronics manual 172

11 TROUBLESHOOTING

MELSEC-Q

Special Relay List (Continued)

ACPU	Special	Special							Applicable
Special	Relay after	Relay for	Name			Meaning		Details
									CPU
Relay	Conversion	Modification
								• Set when consecutive transfer is not executed with
			Continuous	OFF: When transition is				consecutive transfer enabled. Reset when transfer of one
M9104	SM1104	SM324	transition	completed				step is completed.
			suspension flag	ON : When no transition				Consecutive transfer of a step can be prevented by
								writing an AND condition to corresponding SM324.
			Step transition
M9108	SM1108	SM90	watchdog timer
			start (equivalent
			of D9108)
			Step transition
M9109	SM1109	SM91	watchdog timer
			start (equivalent
			of D9109)
			Step transition
M9110	SM1110	SM92	watchdog timer
			start (equivalent
			of D9110)
			Step transition	OFF: Watchdog timer reset				• Turned on when the step transfer monitoring timer is
			watchdog timer
M9111	SM1111	SM93		ON : Watchdog timer reset
			start (equivalent					started. Turned off when the monitoring timer is reset.
				start
			of D9111)
			Step transition
M9112	SM1112	SM94	watchdog timer
			start (equivalent
			of D9112)
			Step transition
M9113	SM1113	SM95	watchdog timer
			start (equivalent
			of D9113)
			Step transition
M9114	SM1114	SM96	watchdog timer
			start (equivalent
			of D9114)
			Active step	OFF: Trace started				• Set when sampling trace of all specified blocks is
M9180	SM1180	SM825	sampling trace
				ON : Trace completed				completed. Reset when sampling trace is started.
			completion flag
M9181	SM1181	SM822	Active step	OFF: Trace not being executed				• Set when sampling trace is being executed.
			sampling trace	ON : Trace execution under				Reset when sampling trace is completed or suspended.
			execution flag	way
								• Selects sampling trace execution enable/disable.
			Active step	OFF: Trace disable/suspend				ON: Sampling trace execution is enabled.
M9182	SM1182	SM821	sampling trace					OFF: Sampling trace execution is disabled.
				ON : Trace enable
			permission					If turned off during sampling trace execution, trace
								is suspended.
								• Selects the operation output when block stop is
								executed.
								ON: Retains the ON/OFF status of the coil being used
M9196	SM1196	SM325	Operation output	OFF: Coil output OFF				by using operation output of the step being
			at block stop	ON : Coil output ON				executed at block stop.
								OFF: All coil outputs are turned off. (Operation output by
								the SET instruction is retained regardless of the
								ON/OFF status of M9196.)
							I/O numbers
				SM1197	SM1198		to be
M9197	SM1197						displayed
			Switch between	OFF		OFF	X/Y	Switches I/O numbers in the fuse blow module storage
							0 to 7F0
			blown fuse and					registers (SD1100 to SD1107) and I/O module verify error
							X/Y
			I/O verification	ON		OFF		storage registers (SD1116 to SD1123) according to the
							800 to FF0
			error display					combination of ON/OFF of the SM1197 and SM1198.
				OFF		ON	X/Y
M9198	SM1198						1000 to 17F0
				ON		ON	X/Y
							1800 to 1FF0
			Data recovery of					• Recovers the setting data stored in the CPU at restart
				OFF: Data recovery disabled				when sampling trace/status latch is executed.
M9199	SM1199		online sampling
				ON : Data recovery enabled				• SM1199 should be ON to execute again. (Unnecessary
			trace/status latch
								when writing the data again from peripheral devices.)

11 - 56 11 - 56