Rockwell Automation 1901 SyncPro - Manual (Page 49)

Troubleshooting 7-3
1901-UM020C-EN-P – June 2013
NOTE: The phase angle transducer, as wired from the factory, is set up for
the customer to run his wiring with an ABC line orientation. If
this was not observed, the user has two options. First, the line
cables can be moved (switching any 2 incoming lines will do) so
that ABC now exists (BCA or CAB are also acceptable), OR the
current transformer leads to the transducer can be swapped at the
transducer.
Table 7.B – Troubleshooting Guide (cont.)
Problem or Trip
indicated
Indication of the following conditions Possible Solutions
Pulse Board Positive and
Negative Pulse Missing
[PULSE BOARD +’VE]
[PULSE BOARD –‘VE]
• The SyncPro is not seeing a pulse train being
supplied from the A/D board at the time of starting.
• The R F 1/R F 2 resistor selection is not correct. The
signal is too weak to provide the necessary pulse
train.
• Pulse train would be lost if either the A/D card
failed, the RF/RF2 selection is incorrect, or if the
connection is not made from the A/D board to
the SyncPro.
• Review the R F 1/R F 2 setup parameter and verify
the procedure performed (see ‘Commissioning’,
item 4, on page 4-7).
Contactor Feedback Lost
[MOTOR CONT. FDBK]
• The SyncPro monitors the status of the
synchronous motor stator contactor while running.
• The male/female connector of the vacuum
contactor is not matched properly.
• The SLC I/O card #4 input 8 is faulty.
• The main contactor coil has failed. Replace the
coil. The connection of the M auxiliary contact
has not been made. Check the wiring.
• The contact has failed. Replace.
• Ensure the connector is matched properly.
• Replace the I/O board.
Set Point Data Lost
[SETPT DATA LOST]
• The parameters entered into the SyncPro are
retained in battery backed up RAM memory.
These setpoints are not being retained by the
SyncPro unit.
• Check the battery located in the processor
module. The battery has either been depleted
or the plug-in connection has not been made.
Note:
This will occur when a new unit is
plugged in for the first time (see Chapter 4).
Halt Synch Relay • The key switch on the SLC 500 processor may be
in program mode.
• Turn the key switch to the «RUN» mode
position.