Causes And Corrective Actions - Delta ASD-A2 Series User Manual

Chapter 12 Absolute System

12.7.1 Causes and Corrective Actions

AL028: Encoder voltage error or the internal of the encoder is in error
Causes
Battery voltage is too
high
The internal encoder is in
error.
AL029 : Gray code error
Causes
Absolute position is in
error
AL060: Absolute Position Lost
Causes
Battery under voltage
Change the battery
when the power is
OFF which is
controlled by the
servo drive
After activating the
absolute function, the
absolute coordinate
initialization has not
been completed.
Bad connection of the
battery power circuit
Revision February, 2017
Checking Method
1. Check if the charging circuit
exists in the servo drive.
2. Check if the battery is correctly
installed
1. Check if it is the absolute type
encoder.
2. Check if the servo is properly
grounded.
3. Check if the encoder cable
separates from the power supply
or the high-current circuit to avoid
the interference.
4. Check if the shielding cables are
used in the wiring of the encoder.
Checking Method
Re-power on to operate the motor and
check if the alarm will occur again.
Checking Method
Check if the voltage of the battery is lower
than 2.8V.
Do no change or remove the battery when
the power is OFF which is controlled by
the servo drive.
1. Install the battery.
2. Check the wiring between the battery
pack and the power cable of the servo
drive.
3. Check the wiring of the encoder.
1. Check the wiring of the encoder.
2. Check the wiring between the battery
pack and the power cable of the servo
drive.
Corrective Actions
According to the procedure of Over
voltage to check. When corrective
actions are done, AL.028 will be
cleared automatically.
1. If the situation is not improving,
please send the drive back to the
distributors or contact with Delta.
2. Please connect the UVW
connector (color green) to the
heat sink of the servo drive.
3. Please check if the encoder
cable separates from the power
supply or the high-current circuit.
4. Please use shielding mesh. If the
situation is not improving, please
send the drive back to the
distributors or contact with Delta.
Corrective Actions
If the alarm occurs again,
please change the encoder.
Corrective Actions
After change the battery,
conduct homing procedure
again. Please refer to the
description of absolute
coordinate initialization in
Chapter 12.
Conduct homing procedure
again. Please refer to the
description of absolute
coordinate initialization in
Chapter 12.
Conduct homing procedure.
Please refer to the description
of absolute coordinate
initialization in Chapter 12.
Connect or repair the wiring of
the battery so as to supply the
power to the encoder. Conduct
homing procedure again.
Please refer to the description
ASDA-A2
12-33