RXDU issues

[indepthmarine]

I have a data logging process on a CJ1M CPU13 via RXDU command on port 2 of SCU41-V1

It has been working, but has stopped.  There are 2 identical machines.  Both Honeywell bar code readers work on 1 machine, while the "RD2" led stays lit on one machine, and wont complete the RXDU command.  On the working machine, it simply flashes quickly during data receive.  I have compared the program in both, and it is identical.

Cabling from both machines have been tested - works on one, not on the other.  Even swapped out SCU41-V1 with same results, so I am pretty certain it is a setting in the main processor of the non-working unit.  I did a compare of SCU settings and they are identical.

#0 is moved into C  #2213 is moved into C +1 on first cycle.  Unit number is 3

1594.06 never seems to complete, which is an open contact in series with A202.02 (N.O.) to trigger RXDU (255)

A202.02 is value 1

1594.06 stays at 0

when I trigger 1594.06 via laptop, it sends garbage data once.

 

 

Any ideas?