Hyperterminal is one program which will display RS232 protocol.
It is sometimes found in the Windows menu under Start>Programs>Windows Accessories>Communications.
If not it can be downloaded.
Another is TeraTerm.
You will need a PC with a serial port or for newer PC's use a USB virtual serial port adapter.
For longer distances a converter to and from RS485 with RS232 at both ends works well.
You didn't say the baud rate in use.
Others will have more info as well.
Norm





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