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4/00 UDC 3300 Controller Product Manual 255
Procedure #3
Table 9-10 explains how to troubleshoot Position Proportional Output
failure symptoms.
Table 9-10 Troubleshooting Position Proportional Output Failure
Step What to do How to do it
1
Make sure the controller is
configured for Position Proportional
output.
Make Output Algorithm Set Up group
function prompt OUT ALG = POSITN.
Refer to Section 3 - Configuration.
2
Check the field wiring. Refer to Section 2 - Installation for
Position Proportional Wiring
information.
3
Check the output. Put the controller into Manual mode
and change the output from 0 % to
100 %.
4
Check whether the motor drives in
both directions. If it does go to Step
6.
See the Position Proportional
calibration procedure in Section 8 for
motor slidewire calibration.
5
Check whether the motor drives in
either direction. If the motor drives
in one direction, check the
slidewire. If the motor does not
drive in either direction, check the
motor.
Refer to the motor instructions.
6
Check the output voltage to the
slidewire.
Should equal from 1.3 to 1.0 volts.
See wiring in the installation section
for terminal designations. The
feedback slidewire output voltage
must vary with the valve position.
7
Make sure the output relays are
actuating properly.
Put the controller into Manual mode.
Vary the output above and below the
present value. Observe “OUT”
indicator on the operator interface.
If they are not working properly, check
the field wiring, then go to Step 5.
If they are, go to Step 8.
8
Recalibrate the controller. Refer to Section 8 - Output
Calibration.
9
Change MCU/Output board. Refer to Table 9-23.