Honeywell UDC3500 - Procedure #3 - Position Proportional; Table 7-7 Troubleshooting Position Proportional Output Failure

Troubleshooting/Service
320 UDC3500 Universal Digital Controller Product Manual 3/07
7.7.3 Procedure #3 – Position Proportional
Table 7-7 explains how to troubleshoot Position Proportional Output failure symptoms.
Table 7-7 Troubleshooting Position Proportional Output Failure
Step What to do How to do it
1
Make certain that the controller
is configured properly for
Position Proportional output.
Make Output Algorithm Set Up group function
prompt OUT ALG = POSPROP.
Make Input 3 Set Up group function prompt
IN3 TYPE = SLIDEW or EU SLIDE (depending
upon slidewire type)
Refer to Section
3 – Configuration.
If the “CAL MTR” diagnostic prompt is flashing
on the lower display, then this means that the
instrument was never calibrated for your
application. See the Position Proportional field
calibration procedure in Section
1 – Output
Calibration for motor slidewire calibration
procedure.
2
Check the field wiring. Refer to Section 2 – Installation for details.
3
Check whether the motor
drives in both directions.
Put the controller into Manual mode. Vary the
output above and below the present value.
Observe “OUT” indicators and the output value
(“OUT”) on the lower display. When the “OUT
1” indicator is on and the “OUT 2” indicator is
off, then the motor should be opening and the
output value shown on the lower display
should be increasing. When the “OUT 1”
indicator is off and the “OUT 2” indicator is on,
then the motor should be closing and the
output value on the lower display should be
decreasing. Listen for a click from a relay
when the OUT1 and OUT 2 indicators change
state.
a) Motor moves in both directions but the
displayed Output value does not change or
does not have a decimal point – Go to Step 4
b) Motor does not move in one or both
directions – Go to Step 5
c) Motor moves in both directions but the
displayed Output value moves in the wrong
direction: This means that the motor or the
slidewire or both are incorrectly wired. Check
the motor manufacturer’s wiring diagram and
then refer to Section
2 – Installation to rewire
the controller.