I want to make a program to communicate with a sinumerik 810d so that I can send/receive programs but I can't find the protocol used for communication. I hope someone can help me.
I don't know what do you mean with "communicate", if You mean as data acquitition then maybe I can help You.
To know how sinumerik 810d send its data, from RS232, You need to try to connect this hardware with PC using serial port, then in Your PC (if You're using Windows) run Hyperterminal (.exe) program which comes with Windows.
Before reading from serial port, You need to configure this program (Hyperterminal) on its options, do it by trial and error.
When configuration is correct, then the program (Hyperterminal) will display correct messages from Your hardware. Use the setting/configuration of Hyperterminal communication on Your program to "commnicate" between the hardware an PC.
Don't forget to activate you hardware and send some data to your PC while You change settings on Hyperterminal.
Well, I hope my interpretation on Your Message is not wrong.
