Rockwell Automation 1784-KTXD User Manual download pdf (Page 130)

Publication 1747-UM011F-EN-P - May 2007

130 Starting Up Your Control System

Output Troubleshooting Steps

1. Make sure the processor is in the Run mode.

2. Verify proper addressing of the output test rung from the

previous page.

3. Using a programming device, locate the output data file and bit

data file. See if the status of the associated bits between these

files match.

4. If the status of the bits match in step 3, and if the status of the

output status indicator match the status of the bits, but the status

of the output device is different, continue to step 5.

If the output status indicator does not match associated bit

status, check status file S:11 and S:12 I/O slot enables. Bits

S:11/0 through S:11/15 and S:12/0 through S:12/14 should all be

1 enabling all I/O slots for the modular system.

If the output slot enable was verified, try exchanging the output

module under test with identical hardware and retest. If the new

hardware works properly, replace the original.

5. Verify proper output voltage at the output terminal and then at

the output device.

6. De-energize the output circuit and check all output circuit

terminations and wire routes.

7. If proper output voltage does not exist at the output device and

the power source is adequate to drive the output device, test the

output device and replace it if necessary.

For more information on output troubleshooting, see page 167.

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Rockwell Automation 1784-KTXD User Manual Page 130