OMG!!!! I have to ship a panel today. Last minute stuff and I have all the serial comms working just fine with my box of adapters, gender changers, etc.,etc. Serial monitoring the data and everything looks good. I grab the DB9 box of connectors and of course it is empty. So I just cut the end off a standard PM02 cable and use the flying leads from the 8 Pin mini dine to a breakout board. Trying to be complete in every way I test the 232 serial again. I can see the target node streaming out data like it should be but the PLC is doing nothing. SO I start checking wiring on the break out board vs the old db9 that I cut off. I am looking for jumpers or loopbacks. anything that could be causing me this problem with the PLC not talking.
35 minutes later I find that I didn't plug in the Cable to the PLC.
The moral of this story is SLOW DOWN.
35 minutes later I find that I didn't plug in the Cable to the PLC.
The moral of this story is SLOW DOWN.