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BECKHOFF
Fault
F16 message:
mains BTB/RTO
F17 message:
A/D converter
F25 message:
Commutation
error
F27 message:
error AS-option
motor does not
rotate
motor oscillates
drive reports
following error
motor overheat-
ing
drive too soft
drive runs
roughly
axis drifts at
setpoint = 0V
n12 message:
Motor default val-
ues loaded
n14 message:
Wake & shake
active
AX2000 Installation manual
02/06
possible causes
— enable was applied, although the
supply voltage was not present.
— at least 2 supply phases are missing
— error in the analog-digital conversion,
usually caused by excessive EMI
— wrong cable
— wrong phasing
— input for AS-Enable and ENABLE
have been set at the same time
— 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
— gain too high (speed controller)
— shielding in feedback cable is broken
— AGND not wired up
— I
or I
is set to low
rms
peak
— setpoint ramp is too long
— I
/I
set too high
rms
peak
— Kp (speed controller) too low
— Tn (speed controller) too high
— PID-T2 too high
— T-Tacho too high
— Kp (speed controller) too high
— Tn (speed controller) too low
— PID-T2 too low
— T-Tacho too low
— offset not correctly adjusted for
analog setpoint provision
— AGND not joined to the CNC-GND
of the controls
— Motor number stored in sine
encoders EEPROM different than
what drive is configured for
— Wake & shake not executed
Appendix
Measures to remove the cause of
the fault
— only enable the servo amplifier
when the mains supply voltage
has been switched on
— check electrical supply
— reduce EMI,
check screening and grounding
— check wiring
— check RES poles (RESPOLES)
check motor poles (MPOLES)
check offset (MPHASE)
— check PLC programming and
wiring
— apply enable signal
— check setpoint cable
— correct motor phase sequence
— check brake control
— check mechanism
— set no. of motor poles
— set up feedback correctly
— reduce Kp (speed controller)
— replace feedback cable
— join AGND to CNC-GND
— increase I
or I
rms
peak
(keep within motor data !)
— shorten setpoint ramp +/-
— reduce I
/I
rms
peak
— increase Kp (speed controller)
— use motor default value for
Tn (speed controller)
— reduce PID-T2
— reduce T-Tacho
— reduce Kp (speed controller)
— use motor default value for
Tn (speed controller)
— increase PID-T2
— increase T-Tacho
— adjust setpoint-offset (analogI/O)
— join AGND and CNC-GND
— If n12 is displayed, default values
for the motor are loaded. Motor
number will be automatically
stored in EEPROM with SAVE.
— Enable the drive
93
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