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Chapter 9 Troubleshooting
Overview
Potential problems have been divided into groups as follows:
1. Installation
2. Stability and Compensation
3. Operation
4. Error Light (Red LED)
The various symptoms along with the cause and the remedy are described in the following tables.
Installation
SYMPTOM
Motor runs away with no
connections from controller to
amplifier input.
MO
Motor is enabled even when
command is given
Unable to read main or auxiliary
encoder input.
Encoder Position Drifts
Encoder Position Drifts
Chapter 9 Troubleshooting ▫ 122
DIAGNOSIS
Adjusting offset causes the motor
to change speed.
SH
The
command disables the
motor
The encoder works correctly when
swapped with another encoder
input.
Swapping cables fixes the problem 1. Poor Connections /
Significant noise can be seen on
MA+ and / or MB+ encoder signals
CAUSE
1. Amplifier has an internal
offset.
2. Damaged amplifier.
1. The amplifier requires the a
different Amplifier Enable
setting on the Interconnect
Module
1. Wrong encoder connections.
2. Encoder configuration
incorrect.
3. Encoder input or controller is
damaged
intermittent cable
1. Noise
REMEDY
Adjust amplifier offset. Amplifier offset may
also be compensated by use of the offset
configuration on the controller (see the OF
command).
Replace amplifier.
Refer to Chapter 3 or contact Galil.
Check encoder wiring. For single ended
encoders (MA+ and MB+ only) do not make
any connections to the MA- and MB- inputs.
CE
Check
command
Contact Galil
Review all connections and connector
contacts.
Shield encoder cables
Avoid placing power cables near encoder
cables
Avoid Ground Loops
Use differential encoders
Use ±12V encoders
DMC-21x5 User Manual 1.0a1
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