Protocol Overview; Mounting Location - Omron CQM1H-SCB41 Operation Manual

Protocol Overview

1-1-5

Mounting Location

1-2

Protocol Overview

Communications Ports and Serial Communications Modes
Board Port
Serial RS-232C
Communi- (port 1)
cations
RS-422A/
Boards
485 (port 2)
4
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.
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 proto-
cols
• No-protocol:
For connections to general-purpose devices for no-protocol communica-
tions 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
Peripheral bus Host Link
or (SYSMAC
Programming WAY)
Console bus
No OK
No OK (See
note 1.)
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
following sections.
Serial Communications Board
Serial communications mode
Protocol No-
macro protocol
OK OK OK
OK OK (See OK (See
note 1.) note 1.)
Section 1-2
1:1 Data 1:N-mode 1:1-mode
Link NT Link
OK (See OK (See
note 2.) note 2.)
OK (See OK (See
note 2.) note 2.)
NT Link