PLCs are installed at different places. Read their PLC data through RS232 and show to HMI.
HMI to write data PLC.Support modbus RTU protocol.
Bothside communication and protocol same.
PLC is connected to RUT956 via RS232
HMI is connected to RUT956 via Rs232.
PLC and HMI are at the distance of more than 300mts.
How to read and write data wirelessly between two device?