STEP AS380 Series User Manual

Shanghai STEP Electric Corporation
Chapter 9 Faults and Solutions
240
Code
Fault
Description
Possible Cause
Solution
Excessive forward load or
load mutation
Check the external causes for load mutations
88
Overspeed in
the reverse
direction (withi
n the
maximum allow
ed range)
Galloping in the field-loss
status of synchronous motor
Check motor
Incorrect self study in angle
of synchronous motor
Restart self study
Encoder parameter error
or interfered
Check encoder circuit
Excessive reverse load or
load mutation
Check the external causes for load mutations
89
Wrong phase
sequence
of UVW
encoder
Problem with
encoder connection or
wrong parameters
Check the connection or change the parameters
90
Encoder comm
unication
failure
Encoder fault
Check encoder wiring and try to do encoder self study
91
Abc over-curren
t (three-phase
Instantaneous v
alue)
Motor single-phase
ground short circuit
Check motor and the output wire circuit
Encoder fault
Check whether the encoder is damaged or the wiring is
correct
Encoder wrong phase
Check encoder phase
Motor wrong phase
Check encoder phase
Phase angle self-study
incorrect
Do phase angle self-study again
Insufficient current when do
phase self-study
Increase current gain of F247 as doing self-study
Error detected on circuit
driver board
Replace driver board
92
Brake detection
failure
No action of output relay
Check the relay control circuit
Relay action brake is not
activated
Check whether the brake power cable is loose or
disconnected
Feedback component fail to
detect signal
Regulate feedback component
93
Input
over-voltage
Incoming voltage is too high
Check whether incoming line voltage matches converter
Problems with switching
power supply voltage
detection circuit
Ask professional technical personnel for Ispection
94
UVW Encoder
disconnection
Problems with encoder
wiring circuit
Check whether the terminal is loose or the wire is broken
or damaged
96
Encoder is not
self study
Synchronous motor fails to
learn encoder angle
Make encoder self study
97
Output
over-current
(RMS)
Running under overload for
too long. The greater the
load, the shorter the time
Stop running for some time. If it occurs again after
re-start, check whether the load is within the allowable
range
Motor stall
Check motor or brake

STEP AS380 Series Specifications

General

Brand	STEP
Model	AS380 Series
Category	Controller
Language	English