Data transfer via communication ports
715
Part III FP Instructions
Communication mode
Select a communication mode. The factory setting for the communication mode is "MEWTOCOL-COM
Master/Slave".
Station number
The station number must be set for MEWTOCOL-COM Master/Slave, Modbus RTU, and for PLC Link.
MEWTOCOL-COM and 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.
For detailed information on setting the station number with the station number setting switch, please refer to the
hardware manuals of the corresponding units.
Baud rate
The setting must match the external device connected to the communication port.
Communication format setting
Default settings:
Data length: 8 bits
Parity: Odd
Stop bit: 1 bit
Start code No STX
End code: CR
The setting must match the external device connected to the communication port.
MEWTOCOL-COM and Modbus RTU: The end code setting must always be "CR", and the start code setting
must be "No STX".
PLC Link: The communication format settings are fixed.
For details on the format of the data in the send buffer and in the receive buffer, please see "Format of send and
re
ceive data" on page 745.
Receive buffer
For pr
ogram controlled communication, a receive buffer must be specified in the system registers. Set a value
for receive buffer starting address and receive buffer capacity.
22.2.1.2 Setting the CPU's COM Ports in PROG Mode via DIP Switches (FP10SH)
1.
2.
3.
Procedure
1. Set the communication format
Default settings:
Data length: 8 bits
Parity: Odd
Stop bit: 1 bit
Start code No STX