Trouble-Shooting - Beckhoff AX2000 Setup Manual

BECKHOFF
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Trouble-Shooting

The following table should be understood as a "First-aid" box. There may be a wide variety of causes of any
fault that occurs, depending on the conditions in your system. In multi-axis systems there may be further hidden
causes of a fault.
Our applications department can give you further assistance with problems.
Fault
Fault message
communication fault
Motor doesn't rotate
Motor oscillates
Motor runs too soft
Motor runs roughly
Setup Software
Possible causes
— wrong cable used
— cable plugged into wrong socket of
the servo amplifier or PC
— wrong PC interface selected
— amplifier disabled
— analog setpoint failed
— Motor phases swapped
— Brake not released
— drive is mechanically blocked
— Motor pole number set incorrectly
— Feedback set up incorrectly
— current limit activated (analog or digital I/O)
— Gain KP too high
— Interference in feedback system
— Analog-GND (AGND) is not
connected with the analog setpoint sources
— Integral time Tn too high
— Gain KP too low
— PID-T2 too high
— T-Tacho too high
— Integral time Tn too low
— Gain KP too high
— PID-T2 too low
— T-Tacho too low
07/03
Measures to remove the cause of the fault
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Trouble-Shooting
use a null-modem cable
plug the cable into the correct
socket of the servo amplifier or PC
select the correct interface
apply enable signal
check PLC-program and cable
correct motor phase sequence
check cable and inverse diode
check drive
correct setting
correct feedback setting
correct current limitation
reduce KP (speed contr.)
replace the feedback cable
connect AGND with setpoint
source
reduce Tn (speed contr.)
increase KP (speed contr.)
reduce PID-T2
reduce T-Tacho
increase Tn (speed contr.)
reduce KP (speed contr.)
increase PID-T2
increase T-Tacho
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