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I am busy implementing MODBUS function 11 (Get Comm Event Counter (Serial Line only)). Handling the function is no problem.
The only question i have is when i have to increase the event counter which is asked by this function.
The specification says....
The event counter is incremented once for each successful message completion. It is not incremented for exception responses, poll commands, or fetch event counter commands.
What is meant by Poll commands? Can someone of you explain this?
Thanks in advance,
Ivar
The only question i have is when i have to increase the event counter which is asked by this function.
The specification says....
The event counter is incremented once for each successful message completion. It is not incremented for exception responses, poll commands, or fetch event counter commands.
What is meant by Poll commands? Can someone of you explain this?
Thanks in advance,
Ivar