Modicon 984-785E series PLC

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Thread Starter

rizwan

We are unable to communicate with Modicon PLC 984-785E series PLC through laptop having Modsoft ver 2.2, the error comes out "Bad checksum error code 120". Can anybody help us?
 
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Robert Willis

You need to provide us some additional information such as the computer make and model, operating system, PLC communication cable pinout and serial port configuration. Modsoft is a DOS based programming package for the Modicon PLC. If you are attempting to use Modsoft running on a newer operating system then it will not be able to gain direct access to the required serial communication port.
 
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