GregoryAshmore
Member
I have two 1734-AENTR/B remote I/O racks attached to a 1769-L33ERM processor.
Both racks are communicating; the inputs update in the PLC as the sensor states change.
The problem is that when output bit states change in the PLC, the states of the output bits on the rack do not change.
However, if I force any bit on or off, all of the output bits on that rack are updated.
So I know that the output bits on the rack are accessible to the PLC.
It seems that the PLC is not sending output data under normal conditions—only in the event of a bit force.
Any suggestions on how to fix this?
Both racks are communicating; the inputs update in the PLC as the sensor states change.
The problem is that when output bit states change in the PLC, the states of the output bits on the rack do not change.
However, if I force any bit on or off, all of the output bits on that rack are updated.
So I know that the output bits on the rack are accessible to the PLC.
It seems that the PLC is not sending output data under normal conditions—only in the event of a bit force.
Any suggestions on how to fix this?