List of Contributions

1769 controllers are notorious for this fault when placed in a mobile machine. basically, they don't do well with vibration the backplane slide connection is not very sturdy when mounted on din rail. First make sure the processor is in prog. You can get past this by physically moving the backplane slide ...

what is the environment hot or cold? how old are the cables some last 5 years others last 10 years? when the problem occurs push in on the rj45 connectors and see if you get immediate results like comm lights on a stratix pick up to normal. sometimes OEMs use home grade rj45 and they are notorious ...

Get a Allen Bradley 1784-U2DHP you can use this on ch1 of the 5/04 processor. ch0 should be rs232 by default, hoping that the OEM did not shutdown the port. Any major faults need cleared using rslogix 500.