I am using the P1AM-200 Automation Direct PLC and ETH module. The P1AM uses Arduino IDE for programming. I have reviewed the example code that Arduino provides for the ethernet library, but I have so far been unable to establish 2-way communication. I am able to set up a server on the PLC but I can only send or receive bytes over ethernet on the desktop computer that the PLC is directly connected to through over ethernet. I also have the Serial connection always connected. I would appreciate any help in understanding ethernet, I am not well versed. I am using a CAT6A ethernet cable.
I have tried to read the ASCII characters sent over ethernet from the PC on the PLC and that works, but when I try to send bytes back, I am unable to read them on the other end. If I write on one end, I cant write on then other. I have ensured that the ETH module initializes.