Modbus Rtu Communication - Panasonic FP0R User Manual

Communication

7.8 Modbus RTU Communication

The Modbus RTU protocol enables the communication between the FP0R and other devices
(including the Panasonic FP-e PLCs, touch terminals of the GT series and KT temperature
controllers as well as Modbus devices by other manufacturers). The master station sends
instructions (command messages) to the slave stations and the slave stations respond (send
response messages) based on the instructions received. The master station has read and
write access to a maximum number of 99 slave stations.
1
Command message
Modbus RTU connection between the FP0R and an external device
NOTE
The Modbus protocol supports both ASCII mode and RTU binary mode.
However, the PLCs of the FP Series only support the RTU binary mode.
Modbus RTU master function
Write and read access to various slaves is possible using the F145_WRITE and F146_READ
instructions. Individual access to each slave as well as global transmission is possible.
FP0R
RS485
1 2
Master Slave
168
2
Response message