Fault possible causes Measures to remove the fault
F25 message:
Commutation er
-
ror
—
wrong cable
—
wrong phasing
—
check wiring
—
check resolver poles (RESPOLES) +
motor poles (MPOLES) + offset (MPHA
-
SE)
motor does not
rotate
—
servo amplifier not enabled
—
break in setpoint cable
—
motor phases swapped
—
brake not released
—
drive is mechanically blocked
—
no. of motor poles set incorrectly
—
feedback set up incorrectly
—
apply enable signal
—
check setpoint cable
—
correct motor phase sequence
—
check brake control
—
check mechanism
—
set no. of motor poles
—
set up feedback correctly
motor oscillates
—
gain too high (speed controller)
—
shielding in feedback cable has a break
—
AGND not wired up
—
reduce Kp (speed controller)
—
replace feedback cable
—
join AGND to CNC-GND
drive reports
following error
—
I
rms
or I
peak
is set to low
—
setpoint ramp is too long
—
increase I
rms
or I
peak
(keep within mo
-
tor data !)
—
shorten setpoint ramp +/-
motor overhea
-
ting
—
I
rms
/I
peak
set too high
—
reduce I
rms
/I
peak
drive too soft
— Kp (speed controller) too low
— Tn (speed controller) too high
— PID-T2 too high
— T-Tacho too high
— increase Kp (speed controller)
— use motor default value for Tn (speed
controller)
— reduce PID-T2
— reduce T-Tacho
drive runs
roughly
— Kp (speed controller) too high
— Tn (speed controller) too low
— PID-T2 too low
—
T-Tacho too low
— reduce Kp (speed controller)
— use motor default value for Tn (speed
controller)
— increase PID-T2
—
increase T-Tacho
axis drifts at
setpoint = 0V
—
offset not correctly adjusted for analog
setpoint provision
—
AGND not joined to the CNC-GND of
the controls
—
adjust setpoint-offset (analog I/O)
—
join AGND and CNC-GND
n12 message:
Motor default va
-
lues loaded
—
Motor number stored in sine encoders
EEPROM different than what drive is
configured for
—
If n12 is displayed, default values for the
motor are loaded. Motor number will be
automatically stored in EEPROM with
SAVE.
n14 message:
Wake & shake
active
—
Wake & shake not executed
—
Enable the drive
SERVOSTAR
®
400 Installation Manual 69
Kollmorgen 07/05 Appendix