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Serial Gateway Overview Section 6-1
Unifying to FINS Networks for Host Link Slave PLCs
■ Pre-Ver. 1.2 Units
Access to PLCs used as Host Link slaves from the PLC used as the Host Link
master by executing user-specified FINS commands is not supported. (The
PLC cannot be used as a Host Link master. Therefore, incorporation of a
communications sequence in the protocol macro is required.)
■ Unit Ver. 1.2 or Later
The Board/Unit’s Serial Gateway enables access to PLCs used as Host Link
slaves from devices on the network (personal computer, PT, and PLC’s CPU
Unit) using user-specified FINS commands. This enables use of the PLC as a
Host Link master while maintaining transparency on the network.
FINS
Network
Network
Modbus command
Network
CMND(490) instructions
Serial
FINS Network System
Serial
Serial Communications Unit/Board
with unit version 1.2 or later
Protocol
conversion
Modbus Slave-compatible
devices
Access to Modbus Slave-
compatible devices from
personal computers, PTs,
PLCs, and other devices
via the network is possible.
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