I know this is strictly not an electrical engineering problem, but I think it's where it has a best chance of being answered.
I'm using a MOXA IOLogik (it's a Ethernet Micro RTU Controller) to monitor and control some security systems with digital IO and I want to modify a IOLokig internal register via TCP to send some commands to the controller from a server.
Anyone knows how to do this? how should the structure of the TCP message be?
UPDATE: It uses the modbus protocol for communication.
Thanks a lot