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Serial Gateway Overview Section 3-6
3-6 Serial Gateway Overview
3-6-1 Overview
FINS messages (commands) that are received are automatically converted
into the corresponding protocol and then sent via serial communications. The
responses are also automatically converted. FINS messages can be con-
verted into the following protocols.
• CompoWay/F
• Modbus-RTU
• Modbus-ASCII
• Host Link FINS (FINS commands enclosed in Host Link header and ter-
minator)
Note Serial Communications Boards/Units can receive FINS commands
via a FINS network (including Host Link FINS) or via the CPU bus.
Applicable Units and Serial Communications Ports
Note Not possible when a CP1E CPU unit is used.
Using the CPU Unit
Command after
conversion
Applicable Units and serial communications
ports
CompoWay/F CS/CJ-series CPU Unit with unit version 3.0 or later,
serial port C on the Controller Section of an NSJ
Controller, or serial port 1 or 2 on Option Board of
CP-series CPU Unit (See note)
Serial communications port on Serial Communica-
tions Board/Unit with unit version 1.2 or later
Modbus-RTU Serial communications port on Serial Communica-
tions Board/Unit with unit version 1.2 or later or serial
port 1 or 2 on Option Board of CP-series CPU Unit
(See note)
Modbus-ASCII Serial communications port on Serial Communica-
tions Board/Unit with unit version 1.2 or later
Host Link FINS
2803
FINS header
FINS message (on network or CPU bus)
FINS header
RS-232C or
peripheral port
on CPU Unit
CompoWay/F command
Serial gateway is enabled when the serial communications mode of
the RS-232C or peripheral port is set to Serial Gateway Mode.
RS-232C or peripheral port
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