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Protocol Conversion Section 6-5
6-5 Protocol Conversion
6-5-1 Types of Protocol Conversion
Note For details on FINS response end codes, refer to Troubleshooting Using FINS
End Codes
in 11-3-2 Serial Gateway (Serial Gateway or Protocol Macro
Mode)
.
6-5-2 Converting FINS to CompoWay/F
OMRON Components connected serially to a PLC via CompoWay/F can be
accessed from the CPU Unit or PT using CompoWay/F commands enclosed
in FINS messages.
• Sent FINS message: FINS header + FINS command code 2803 hex +
CompoWay/F command
• Message after conversion: CompoWay/F command
Type of
conversion
(from FINS)
Frame before conversion Processing at
Board/Unit
Protocol after
conversion
(using serial
communica-
tions)
Target (commu-
nications part-
ner)
Destination
address
FINS
command
FINS data
Converting to
CompoWay/F
Serial port
number on
Board/Unit
2803 hex CompoWay/F
command
CompoWay/F
command with
FINS header
removed sent to
serial port.
CompoWay/F
command
OMRON Compo-
nent (e.g., Tem-
perature
Controller, Digital
Panel Meter, or
Smart Sensor)
Converting to
Modbus-RTU
2804 hex Modbus-RTU
command
Modbus-RTU
command with
FINS header
removed sent to
serial port.
Modbus-RTU
command
Modbus-RTU
Slave-compatible
device (including
OMRON 3G3JV,
3G3MV, and
3G3RV Inverters)
Converting to
Modbus-ASCII
2805 hex Modbus-ASCII
command
Modbus-ASCII
command with
FINS header
removed sent to
serial port.
Modbus-ASCII
command
Modbus-ASCII
Slave-compatible
device (e.g., tem-
perature control-
ler, indicator, or
power monitor)
Converting to
Host Link FINS
Any address
except Board/
Unit’s serial
port number.
User-speci-
fied
User-specified Transfers FINS
command inside
Host Link header
and terminator.
FINS com-
mand for Host
Link communi-
cations
OMRON PLC
(CS/CJ Series, or
CVM1/CV
Series)
FINS message
FINS header
CompoWay/F command
2803
(Via network or CPU bus)
CompoWay/F command
CompoWay/F command
(RS-232C or RS-422A/485)
CPU Unit
(CMND(490)
instruction) or
PT (Program-
mable Termi-
nal)
CompoWay/F command encapsulated
using FINS command 2803 hex
Serial Com-
munications
Unit/Board
CompoWay/F-
compatible
OMRON
Component
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