Communication
FPΣ User's Manual
166
Station number
The station number must be set for MEWTOCOL-COM Master/Slave, Modbus RTU, and for
PLC Link.
MEWTOCOL-COM
Modbus RTU
The station number can be set within a range of 1 to 99.
PLC Link
The station number can be set within a range of 1 to 16.
Setting the station number setting switch to a value other than 0 enables the switch setting,
and the system register setting is ignored. In this case, the same station number is allocated
to all communication ports.
Setting the station number setting switch to 0 enables the SYS1 instruction and the system
register settings.
For detailed information, see "
Setting Station Numbers" on page 167.
Baud rate
The default baud rate for the various ports is 9600bit/s. Select a value from 2400 to
115200bit/s.
Lower baud rates of 300, 600, and 1200bit/s can be specified using the SYS1 instruction.
However, this will not change the setting value of the system register.
The setting must match the external device connected to the communication port.
PLC Link: The baud rate is fixed at 115200bit/s.
When the RS485 port (COM port 1) of FPG-COM4 is used, set the baud rate in the system
registers to either 19200bit/s or 115200bit/s. Set DIP switch SW1-2 of the cassette to the
same setting (see page
162).
Communication format setting
Default settings:
Data length:
8 bits
Parity:
Odd
Stop bit:
1 bit
End code:
CR
Start code:
No STX
The setting must match the external device connected to the communication port.
MEWTOCOL-COM
Modbus RTU
The communication format settings are fixed.
PLC Link
The communication format settings are fixed.
Receive buffer
For program controlled communication, a receive buffer must be specified in the system
registers. Set a value for receive buffer starting address and receive buffer capacity. See
"
Setting Communication Parameters" on page 188.
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