Omron CP1H CPU Operation Manual page 380

Serial Communications
346
This functionality is enabled when the serial communications mode is set to
Serial Gateway.
FINS message (on network or CPU bus)
FINS header 2803 CompoWay/F command
2804
FINS header
Modbus-RTU command
The serial gateway functionality is enabled when serial port 1 or 2 is set to
the Serial Gateway Mode.
Contents of FINS header
• Destination network address(DNA)
a) When the routing table for network control of serial communication
channel is developed:
It is the network address that corresponds to serial communication
port according to the routing table.
b) When the routing table for networking serial communication channel is
not developed:
It is the network address when actual destination PLC is specified.
• Destination node address (DA1)
a) When the routing table for network control of serial communication
channel is developed:
00Hex (means PLC internal communication)
b) When the routing table for network control of serial communication
channel is not developed:
It is the node address when actual destination PLC is specified.
• Destination model address (DA2)
It needs to be the model address of serial communication port.
Serial communication port of CP1H
Serial port 1
Serial port 2
Serial port 1 or
2 on CPU Unit
Serial port 2:0xFC
Serial port 1:0xFD
Model address of serial
communication port
FDHex (decimal 253)
FCHex (decimal 252)
Section 6-1
(Serial port 1 or 2)
CompoWay/F command
Modbus-RTU command