374 Fault tracing
71A5
Mechanical brake
opening not allowed
Open conditions of mechanical
brake cannot be fulfilled (for
example, brake has been
prevented from opening by
parameter
Check mechanical brake settings in
parameter group
).
Check that acknowledgement signal (if
used) matches actual status of brake.
In an encoderless application,
the brake is kept closed by a
brake close request (either
from parameter
FSO-xx safety functions
module) against a modulating
drive for longer than 5
seconds.
Check the source signal selected by
parameter
Check the safety circuits connected to
the FSO-xx safety functions module.
71B1
Motor fan
Programmable fault:
No feedback received from
external fan.
Check external fan (or other equipment
controlled) by the logic.
Check settings of parameters
.
7301
Motor speed feedback
No motor speed feedback
received.
See
).
7310
Overspeed
Motor is turning faster than
highest allowed speed due to
incorrectly set
minimum/maximum speed,
insufficient braking torque or
changes in load when using
torque reference.
Check minimum/maximum speed
settings, parameters
.
Check adequacy of motor braking torque.
Check applicability of torque control.
Check need for brake chopper and
resistor(s).
Incorrect estimated speed.
Check the status of motor current
measurement.
Perform a
or
ID run instead of, for
example, a
ID run.
(page
).
7380
Encoder internal
Internal fault.
Contact your local ABB representative.
7381
Encoder
Encoder feedback fault.
See
).
73A0
Speed feedback
configuration
Speed feedback configuration
incorrect.
See
(page
).
73A1
Load feedback
No load feedback received.
Check the auxiliary code (format XXYY
ZZZZ). “XX” specifies the number of the
encoder interface module (
01
:
02
:
/
), “YY”
specifies the encoder (
01:
). “ZZZZ” indicates the
problem (see actions for each code
below).
0001 Load gear definition invalid or
outside limits.
Check load gear settings (
and
Code
(hex)
Fault
Cause
What to do
Summary of Contents for ACS860
Page 1: ... ABB INDUSTRIAL DRIVES ACS860 primary control program Firmware manual ...
Page 4: ......
Page 10: ...10 Table of contents ...
Page 18: ...18 Using the control panel ...
Page 24: ...24 Control locations and operating modes ...
Page 54: ...54 Program features ...
Page 78: ...78 Program features ...
Page 90: ...90 Application macros ...
Page 342: ...342 Additional parameter data ...
Page 380: ...380 Fault tracing ...
Page 381: ...Fault tracing 381 ...
Page 382: ...382 Fault tracing ...
Page 436: ...436 Control chain diagrams ...