Woodward AtlasPC, Hardware Manual

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Manual 85586V1 AtlasPC Digital Control, Vol. I
Woodward 41
Discrete Inputs
If a discrete input is not functioning properly, verify the following:
•
Measure the input voltage on the terminal block. It should be in the range of
18–28 Vdc.
•
Check the wiring, look for a loose connection at the terminal blocks and
disconnected or misconnected cables.
•
Check the software configuration to ensure that the input is configured
properly.
After verifying all of the above, the AtlasPC should be returned for service.
Serial I/O
If a serial port is not functioning properly, verify the following:
•
Check the wiring, look for a loose connection at the terminal blocks and
disconnected or misconnected cables.
•
Check to be sure that termination resistors are properly installed where
needed on the network.
•
Check the software configuration to ensure that the input is configured
properly.
•
Check that the cable is shielded and the shield is properly grounded per the
shields and grounding section in Chapter 2.
After verifying all of the above, the AtlasPC should be returned for service.