I wrote a winform application that can send modbus commands to a PLC via RS232
cable connected, or via GSM modem.
If I'm locally connected to the PLC (RS232) I can read and write multiple
registers with the maximum buffer length without any problem (I set the
application maximum at 100 instead of 123 registers per request).
If I switch in GSM communication I can read the maximum registers number
without any problem (100) but the maximum registers number I can write falls
around 10 or less.
If I try writing more registers I get a timeout error.
I don't know what the issue can be about.
Can anyone help me?
Original issue reported on code.google.com by
faster.b...@gmail.comon 19 Mar 2015 at 7:53