Omron CJ1G/H-CPU series Operation Manual page 147

Expanded System Configuration
Note
No-protocol (Custom)
Communications System
114
Host computer
FINS commands sent via
SEND/RECV/CMND
instructions from the PLC
RS-232C
Host Link commands
or FINS commands
1. Set pin 4 of the DIP switch on the front panel of the CPU Unit to ON, and
set the serial communications mode in the PLC Setup to Host Link.
2. Set pin 5 of the DIP switch on the front panel of the CPU Unit to OFF, and
set the serial communications mode in the PLC Setup to Host Link.
3. Host Link master functions can be performed by sending the CMND(490)
instruction via the Serial Gateway when using Serial Communications
Boards/Units with unit version 1.2 or later.
PLC (Host Link Master)
Serial Communications
Board/Unit
Serial
Gateway
FINS
Host Link
header
No-protocol communications allow simple data transmissions, such as input-
ting bar code data and outputting printer data using communications port I/O
instructions TXD(236) and RXD(235). The start and completion codes can be
set and, RS and CS signal control is also possible with no-protocol communi-
cations.
RXD(235) instruction
RS-232C
TXD(236)
instruction
Applicable port
CPU Unit
Peripheral port
Yes
(See note 1.)
FINS command sent
CMND(490)
FINS
Host Link
terminator
PLC Host Link slave)
Applicable port
CPU Unit
Peripheral port
No
General-purpose external device
Section 2-5
Serial
Communi-
cations
Unit
RS-232C port
Yes
Yes
(See note 2.)
Serial
Communi-
cations
Unit
RS-232C port
Yes
Yes
(See note 2.)
(See note 1.)