Rockwell Automation 57C403 115VAC High Power Output Module - Manual (Page 17)

5Ć1
5.0 DIAGNOSTICS AND
TROUBLESHOOTING
This section explains how to troubleshoot the module and field
connections.
5.1 Incorrect Data
Problem: The device connected to theoutput is either always off,
always on, or acting different than expected. The possible causes of
this are a module in the wrong slot, a programming error, or a
malfunctioning module. It is also possible that the output is either not
wired or wired to the wrong device. Use the following procedure to
isolate the problem:
Step 1.
Verify that the output module is in the correct slot and that
the I/O definitions are correct.
Refer to figure 3.2. Verify that the slot number being
referenced agrees with the slot number defined in the
configuration. Verify that the register number is 0. Verify
that the bit number refers to the proper bit. Note that the
bit number and the wire number are not the same.
For remote I/O installations, also verify that the master slot
and remote drop number are defined correctly.
Step 2. Verify that the power supply is functional.
Stop all tasks that may be running.
Confirm that all connections at the terminal strip are tight.
Connect a voltmeter to the power supply connections on
the terminal strip. Ifthe voltage is not correct, there is a
problem with the power supply or the wiring to the
terminal strip.
Check the cable for continuity between the faceplate
connector and the terminal strip.
Step 3. Verify that the module can be accessed.
Connect the programming terminal to the system and run
the ReSource Software.
Stop all tasks that may be running.
Use the I/O MONITOR function. Toggle the output device
and determine whether the bit is changing state by
observing the condition ofthe LED on the module. Ifthe
LED does not change state, the hardware is
malfunctioning.
WARNING
BE CAREFUL WHEN WRITING TO THE OUTPUTS TO INSURE THAT NO
UNEXPECTED MACHINE MOTION WILL RESULT. FAILURE TO OBSERVE THIS
PRECAUTION COULD RESULT IN BODILY INJURY OR DAMAGE TO EQUIPMENT.
Step 4. Verify that the output circuit on the module is working
correctly.