Mitsubishi Electronics manual 194

11 TROUBLESHOOTING

MELSEC-Q

Special Register List

(4) Scan information

				Set by	Corresponding	Corresponding
Number	Name	Meaning	Explanation		ACPU
				(When set)		CPU
					D9
	Execution	Execution type of	• Program number of program currently being executed is	S (Status
SD500		program being			New
	program No.		stored as BIN value.	change)
		executed
	Low speed	File name of low	• Program number of low speed program currently being	S (Every
SD510		speed execution in	executed is stored as BIN value.	END	New
	program No.
		progress	• Enabled only when SM510 is ON.	processing)
		Current scan time	• Current scan time is stored into SD520, SD521.	S (Every	D9017 format
SD520			(Measurement is made in 100∝s increments.)	END
		(ms unit)			change
			SD520: Place of ms is stored (storage range: 0 to 65535)	processing)
	Current scan		SD521: Place of ∝s is stored (storage range: 0 to 900)
	time	Current scan time	Example: Current scan time 23.6ms is stored as indicated	S (Every
SD521			below.	END	New
		(∝s unit)
			SD520 = 23	processing)
			SD521 = 600
SD522		Initial scan time	• Scan time of initial execution program is stored into SD522,	S (First
	Initial scan	(ms unit)	SD523. (Measurement is made in 100∝s increments.)
				END	New
	time	Initial scan time	SD522: Place of ms is stored (storage range: 0 to 65535)
SD523				processing)
		(∝s unit)	SD523: Place of ∝s is stored (storage range: 0 to 900)
		Minimum scan time	• Minimum value of scan time with the exception of initial	S (Every	D9018 format
SD524				END
		(ms unit)	execution program scan time is stored into SD524, SD525.		change
	Minimum scan			processing)
	time		(Measurement is made in 100∝s increments.)
				S (Every
		Minimum scan time	SD524: Place of ms is stored (storage range: 0 to 65535)
SD525				END	New
		(∝s unit)	SD525: Place of ∝s is stored (storage range: 0 to 900)
				processing)
SD526		Maximum scan time	• Maximum value of scan time with the exception of initial		D9019 format
		(ms unit)	execution program scan time is stored into SD526, SD527.	S (Every	change
	Maximum scan
			(Measurement is made in 100∝s increments.)	END
	time	Maximum scan time
SD527			SD526: Place of ms is stored (storage range: 0 to 65535)	processing)	New
		(∝s unit)
			SD527: Place of ∝s is stored (storage range: 0 to 900)
SD528	Current scan	Current scan time	• Current scan time of low speed program is stored into
	time	(ms unit)	SD528, SD529. (Measurement is made in 100∝s	S (Every
	for low speed	Current scan time	increments.)	END	New
SD529	execution type		SD528: Place of ms is stored (storage range: 0 to 65535)	processing)
	programs	(∝s unit)	SD529: Place of ∝s is stored (storage range: 0 to 900)
SD532	Minimum scan	Minimum scan time	• Minimum value of low speed program scan time is stored
	time for	(ms unit)	into SD532, SD533. (Measurement is made in 100∝s	S (Every
	low speed	Minimum scan time	increments.)	END	New
SD533	execution type	(∝s unit)	SD532: Place of ms is stored (storage range: 0 to 65535)	processing)
	programs		SD533: Place of ∝s is stored (storage range: 0 to 900)
SD534	Maximum scan	Maximum scan time	• Maximum value of low speed program scan time with the
	time for	(ms unit)	exception of the first scan is stored into SD534, SD535.	S (Every
	low speed	Maximum scan time	(Measurement is made in 100∝s increments.)	END	New
SD535	execution type		SD534: Place of ms is stored (storage range: 0 to 65535)	processing)
	programs	(∝s unit)	SD535: Place of ∝s is stored (storage range: 0 to 900)
SD540		END processing time	• Time from scan program end until next scan start is stored
	END	(ms unit)	into SD540, SD541. (Measurement is made in 100∝s	S (Every
	processing	END processing time	increments.)	END	New
SD541	time		SD540: Place of ms is stored (storage range: 0 to 65535)	processing)
		(∝s unit)
			SD541: Place of ∝s is stored (storage range: 0 to 900)

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