Omron CJ - PROGRAMMING MANUAL 12-2009 - Page 345

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Serial Communications Section 6-3
2. The contents of the CompoWay/F command enclosed in the FINS mes-
sage that is sent is as follows:
Node number + subaddress + SID + command text (ASCII must be used.)
STX, ETX+BCC are not required when sending FINS. They are added au-
tomatically for serial communications.
Sending FINS Messages
Using CMND(490) in CPU
Unit's Ladder Program
The CPU Unit converts the FINS messages to CompoWay/F protocol for
sending in this operation.
Access from CPU Unit (on the Same PLC)
Access from CPU Unit (PLC on the Network)
CPU Unit’s serial port Serial port’s unit address
Peripheral port FD hex (253 decimal)
RS-232C port FC hex (252 decimal)
Serial conversion Details Routing tables to
treat serial
communications path
as network
OMRON components
connected serially to
the CPU Unit’s RS-
232C port using Com-
poWay/F can be
accessed from a CPU
Unit in the same PLC.
Optional
2803
FINS header
FINS message
RS-485 (CompoWay/F)
CPU Unit with unit version 3.0 or later
CMND(490)
Protocol
conversion
CompoWay/F
command
CompoWay/F-compatible
OMRON component
RS-232C port
CompoWay/F
command
FINS message-to-serial Details Routing tables to
treat serial
communications path
as network
OMRON components
connected serially to
the CPU Unit’s RS-
232C port using Com-
poWay/F can be
accessed from a CPU
Unit in a PLC con-
nected to the network.
Optional
CPU Unit with unit
version 3.0 or later
RS-485 (CompoWay/F)
FINS header
CMND(490)
FINS message
2803
CompoWay/F
command
Network (Ethernet, Controller
Link, DeviceNet)
Protocol
conversion
CompoWay/F-compatible
OMRON component
CompoWay/F
command