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I was trying to use the Jazz PLC as a mod bus slave and forced the following System integers in my program:

SI 141 = #1

SI 142 = #100

SI 143 = #3

SI 144 = #2

SI 145 = #19200

SI 140 = #600

After I loaded my program to the PLC, I modified the program in the U90 Ladder and tried to reload it but it resulted in a communication failure. The comm parameters are perfectly matched and the cable does not seem to be at fault. Is this because of the program? If so is there any way I can delete the program via the keypad? I tried to stop the program using the Info button and tried to re-establish communications but that did not work. Is there any way to revert to Factory Settings? Is this step necessary in this case? I would appreciate it if someone could answer my questions.

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