Honeywell UDC2500 - Manual (Page 187)

Troubleshooting/Service
4/07 UDC2500 Universal Digital Controller Product Manual 173
Procedure #9
Table 7-13 explains how to troubleshoot a Communications failure
Table 7-13 Troubleshooting an Ethernet Communications Failure
Step What to do How to do it
1 Check the IP address, Subnet
Mask address and Gateway
address settings. See the PIE Tool Manual.
2 Check if the Ethernet Connection
is active. Looking into the instrument, there should be steady
green LED. If this is not present, then the
instrument is not seeing a valid Ethernet
connection. See Section 2.7 for wiring diagrams. A
second green LED will blink during actual Ethernet
transactions.
3 Change Ethernet
Communications board. Installation instructions provided with new
board.
4 Change Controller
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 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. Installation instructions provided with new
board.
6 Change Controller