YASKAWA SIEMENS CNC Series, Руководство по обслуживанию, Руководство для служащего по обслуживанию

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Error and Troubleshooting
15-2
15.1 Errors without Alarm Display and Troubleshooting
The table below shows the causes and their countermeasures for the malfunctions accompanied
with no alarm generation.
Before you check or take a countermeasure for what is described in the half-tone meshing col-
umn, you must turn off the power supply of servo system.
If you cannot remedy the malfunction even with these measures, please contact our service
group without delay.
Table 15.1
Malfunction Cause Check point Countermeasure
Motor does not start. The power supply is not turned
on. Check the voltage between the
power source terminals. Correct the power turn-on cir-
cuit.
Connection is loose. Check the connector (CN2,
CN5) terminals. Correct the loose connection.
External wiring of connector
(CN2, CN5) is wrong. Check the external wiring for
CN2 and/or CN5. Wire correctly according to the
connection diagram.
The servo motor and the encoder
are unconnected. Connect the cable properly.
There generates overloading. Try the no-load running. Reduce the load, or replace with
a servo drive which has larger
capacity.
Speed/position reference is
missed. Check the input pin. Input the speed/position refer-
ence properly.
The type of encoder to use is not
the one which is set with the
user constant. Check the setting for whether an
incremental encoder or an abso-
lute value encoder. Set the user constant Pn 002.2
to match the encoder type to be
used.
Servo motor almost
activates but comes back
to and remains a standstill. The servo motor and the encoder
is improperly wired. Correct the wiring.
Servo motor suddenly
stops during operation and
then wouldn’t run. An emergency stop is activated. Check the emergency stop sig-
nal. Turn off the emergency stop sig-
nal.
The servo motor is cut off from
the power source. Check the power source. Properly turn on the power.
Servo motor rotates
unstablly. There is a malfunction on the
connection to the motor. Check the condition of connec-
tors of the power cable (U-, V-,
and W-phase) and encoder. Correct the loose connecting
parts of processing terminal or
connector.
Servo motor vibrates at the
frequency around 200 to
400 Hz. The speed loop gain is exces-
sively high. Decrease the setting value for
the user constant Pn100 (speed
loop gain).
The wiring for speed/position
reference input is excessively
long. Arrange the command input wir-
ing shortest. Reduce the imped-
ance to be equal or less than 100
Ω
.
The wiring for speed/position
reference input is bundled with
the power cable. Separate the wiring for reference
input from the power cable at
least 30 cm.
When the motor starts or
stops, the speed overshoot
is very large. The speed loop gain is exces-
sively high. Decrease the setting value for
user constant Pn100 (speed loop
gain). Increase the setting value
for user constant Pn101 (integral
time constant).