Troubleshooting/Service
Procedure #10
Table 7-14 explains how to troubleshoot Auxiliary Proportional Output failure
symptoms.
Table 7-14 Troubleshooting Auxiliary Output Failure
Step What to do How to do it
1
Make sure the controller is
configured for Auxiliary Output
and the proper range (4 to 20 or
0 to 20) is configured.
Make Options Set Up group function prompt
AUX OUT any selection other than NONE. If
this prompt does not show up, check if DIG IN
2 is enabled. If so, then as Auxiliary Ouptut
and Digital Input 2 are mutually exclusive, you
must chose which one of these features you
wish to use.
Make the Options Set UP group function
prompt CRANGE = 4–20 or 0–20 per your
application.
Refer to Section 3 - Configuration.
2
Check the field wiring. Output impedance must be less than or equal
to 1000 ohms.
3
Installation instructions provided with new
board.
Check the output. Change the AUX OUT selection to OUTPUT.
Put the controller into Manual mode and
change the output from 0 % to 100 % (4-20
mA). Use a DC milliammeter at the rear
terminals to verify the output.
4
Recalibrate the Auxiliary output. Refer to Section 6 - Output Calibration for
details.
5
Change Auxiliary Output board.
6
Change Controller
12/04 UDC3200 Universal Digital Controller Product Manual 169
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