Omron CQM1H-SCB41 operation manual Protocol Overview, Mounting Location

Basic Operating Procedure Section 1-2

1-1-5 Mounting Location

The Serial Communications Board can be installed in Inner Board slot 1 of a

CQM1H-series CPU Unit. The Board cannot be installed in slot 2.

Mount here	Not mountable
Slot 1:	Slot 2:

Serial Communications Board

1-2 Protocol Overview

The following six serial communications modes can be used as required for each serial communications port on the Serial Communications Board.

•Host Link:

For connections to host computers, personal computer peripheral devices, or Programmable Terminals

•Protocol Macros:

For communications with general-purpose external devices using protocols

•No-protocol:

For connections to general-purpose devices for no-protocol communications using TXD(––) and RXD(––) instructions

•1:1 Data Links:

For 1:1 data links with a C-series PC, including another CQM1H

•1:N-mode NT Link:

For communications with one or more Programmable Terminals (PTs)

•1:1-mode NT Link:

For communications with one PT

Communications Ports and Serial Communications Modes

Board	Port			Serial communications mode
		Peripheral	Host Link	Protocol	No-	1:1 Data	1:N-mode	1:1-mode
		bus or	(SYSMAC	macro	protocol	Link	NT Link	NT Link
		Programming	WAY)
		Console bus
Serial	RS-232C	No	OK	OK	OK	OK	OK (See	OK (See
Commu-	(port 1)						note 2)	note 2)
nications
	RS-422A/	No	OK (See	OK	OK (See	OK (See	OK (See	OK (See
Boards
	485 (port 2)		note 1)		note 1)	note 1)	note 2)	note 2)

Note 1. A 4-wire connection must be used when using Host Link, no-protocol, or 1:1 Data Link communications with an RS-422A/485 connector.

2. The PT Programming Control functions are not supported.

Connection examples for the serial communications modes are shown in the fol- lowing sections.

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