Error Diagnosis Due To Operating Status - Omron OMNUC W Series Manual

9 Troubleshooting

9.4 Error Diagnosis Due To Operating Status

Symptom
Servomotor does not start.
Servomotor does not run.
Servomotor moves instanta-
neously, then stops.
Servomotor speed unstable
Servomotor vibrates at ap-
9
proximately 200 to 400 Hz.
High rotation speed over-
shoot on starting and stop-
ping
Servomotor overheated
Refer to the tables below to identify the cause of a problem which causes no alarm display and
take the remedy described.
Turn OFF the servo system power supply before commencing the shaded procedures.
Table 9.3 Troubleshooting Table with No Alarm Display
Cause
Power not connected
Loose connection
Connectors (CN1, CN4, and CN6)
external wiring incorrect
Servomotor or encoder wiring dis-
connected
Overloaded.
Encoder type differs from parameter
setting.
POT and NOT inputs are turned OFF.
Software limit reached
Move commands have not been sent.
Servo ON Command has not been
sent.
Servomotor or encoder wiring incor-
rect.
Wiring connection to Servomotor is
defective.
Speed loop gain value is too high.
Speed loop gain value is too high.
Speed loop gain value too low com-
pared to position loop gain value.
Ambient temperature is too high.
Servomotor surface is dirty.
Overloaded
Inspection
Check voltage between
power supply terminals.
Check terminals of connec-
tors (CN1, CN2, CN4, and
CN6).
Check connectors (CN1,
CN4, and CN6) external
wiring.
−
Run under no load.
Check the type of encoder
being used.
Refer to 8.3.
Refer to 5.3.3.
Check using DeviceNet
communications or the
DeviceNet monitor.
−
Check connection of
phase-U, -V, and -W power
lines and encoder connec-
tors.
−
−
−
Measure Servomotor ambi-
ent temperature.
Visual check
Run under no load.
9-44
Remedy
Correct the power circuit.
Tighten any loose parts.
Refer to connection diagram
and correct wiring.
Reconnect wiring.
Reduce load or replace with
larger capacity Servomotor.
Set parameter Pn002.2 to the
encoder type being used.
Turn POT and NOT input sig-
nals ON.
Operate the Servomotor within
software limits.
Send the move commands.
Send Servo ON Command.
Refer to chapter 4 Connec-
tors and correct wiring.
Tighten any loose terminals or
connectors.
Reduce Speed Loop Gain
(Pn100) preset value.
Reduce Speed Loop Gain
(Pn100) preset value.
Increase Speed Loop Integra-
tion Constant (Pn101).
Increase Speed Loop Gain
(Pn100) preset value.
Reduce Speed Loop Integra-
tion Constant (Pn101).
Reduce ambient temperature to
°
40 C max.
Clean dust and oil from motor
surface.
Reduce load or replace with
larger capacity Servomotor.