Omron CQM1H-SCB41 operation manual Half-duplex transmissions that use CD

Connections			Section 4-5
Previous	Model number	Changes required for CQM1H-series product
products
		Wiring	Other
C-series CPU	SRM1	No changes have been	It may be possible to use the host computer
Units	CPM1	made in wiring.	programs without alteration as long as the
			same communications settings (e.g., baud
	CPM1A
			rate) are used. It may be necessary, however,
	CPM2A/CPM2C		to change programs to allow for different
			CQM1H command specifications.
	CQM1-CPUjj-E
	C200HS-CPUjj-E
	C200HX/HG/HE-
	CPUjj-E
	C200HW-COMjj-E
CS1-series CPU	CS1G/H-CPUjj	No changes have been	It may be possible to use the host computer
Unit		made in wiring.	programs without alteration as long as the
			same communications settings (e.g., baud
CS1-series	CS1W-SCB21/41	No changes have been
			rate) are used. It may be necessary, however,
Serial	CS1W-SCU21	made in wiring.
			to change programs to allow for different
Communications
			CQM1H command specifications.
Board or Unit
CVM1 or	CVM1/CV-CPUjj	No changes have been	It may be possible to use the host computer
CV-series CPU		made in wiring.	programs without alteration as long as the
Units			same communications settings (e.g., baud
			rate) are used. It may be necessary, however,
			to change programs to allow for different
			CQM1H command specifications.
CVM1 or	CV500-LK201	Port 1:	The following changes are necessary for
CV-series Host		The connector has been	half-duplex transmissions that use CD.
Link Unit		changed from a 25-pin to a	Check the system for timing problems when
		9-pin connector.
			using SEND(90), RECV(98), or CMND(––) to
		Port 2 set for RS-232C:	initiate communications from the PC or timing
		The SG signal has been	problems in sending commands from the host
		changed from pin 7 to pin 9.	computer. If necessary, switch to full-duplex
			transmissions.
			The following changes are necessary for
			full-duplex transmissions that do not use
			CD.
			Half-duplex It may be possible to use the host
			computer programs without alteration as long
			as the same communications settings (e.g.,
			baud rate) are used. It may be necessary,
			however, to change programs to allow for
			different CQM1H command specifications.

Note The number of words that can be read and written per frame (i.e., the text lengths) when using C-mode Host Link commands is different for C-series Host Link Units and CQM1H-series Serial Communications Boards. A host computer program previously used for C-series Host Link Units may not function correctly if used for CQM1H-series PCs. Check the host computer program before using it and make any corrections required to handle different frame text lengths.

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