Omron CQM1H-SCB41 operation manual 319

3Z4L Laser Micrometer Protocol					Appendix K
	Sequence	Communications sequence	Function	Ladder interface
	No.	name
				Send word		Receive
				allocation		word
						allocation
	439	Data request (4000-series)	Requests measurement data in the idle	No		Yes
			measurement status or the latch data
			generated by the measurement com-
			mand.
	440	Forced positive zero	Sets the forced zero direction to positive	No		No
		(4000-series)	(+).
	441	Forced negative zero	Sets the forced zero direction to negative	No		No
		(4000-series)	(–).
	442	Forced zero release (4000-se-	Releases the forced zero direction.	No		No
		ries)
	443	3Z4L initialize (4000-series)	Clears the 3Z4L, sets the mm unit, and	Yes		No
			clears the memory unit settings.
	444	General-purpose command 1	Used to send data of a specified data	Yes		No
			length, and receive only OK as the re-
			ceive data.
	445	General-purpose command 2	Used to send data of a specified data	Yes		Yes
			length, and receive data other than OK.
	*1 Depends on the measurement contents.
	Note Ladder Interface Settings
	YES:	User settings are required for the 2nd and 3rd operands of PMCR.
	NO:	Send word allocation:	Set a dummy word address for the 3rd operand (D).
		Receive word allocation:	Set the constant 0000 for the 2rd operand (S).

Connections

The connections for the 3Z4L Laser Micrometer Protocol are shown below.

RS-232C Connection

	Sensor
CQM1H	Signal cable
Serial Communica-	Controller
tions Board
RS-232C Port

Serial Communications Board:		Controller: D-sub
D-sub 9 pin (female)		25 pin (female)
Signal	Pin No.	Pin No.	Signal
name			name
FG	1	1	FG
SD	2	2	TXD
RD	3	3	RXD
RS	4	4	RTS
CS	5	5	CTS
DR	7	6	DSR
ER	8	7	SG
SG	9	20	DTR

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