Hi,
I'm thinking of using a Nano PLC to read some modbus slave data into the DM via the RS485 port.
Then use My Modbus TCP master access the PLC via the Ethernet port to read / write data back and forth to the slave device.
I need to ensure I don?t end up over writing values that are being read into the same location simultaneously, likewise I'm not sure how the PLC will respond to the TCP port reading a DM value at the same time the serial port is writing the data??
I was also thinking about request / response timing on both ports and if a buffer may be needed?
?
Do you guys have any words of advice before I commit too much time to this? do you think I would be better off purchasing an off the shelf serial to Ethernet server?
Any thoughts appreciated.