47
DMM Technology Corp.
DYN4 AC Servo Drive Instruction Manual
REV. ZM7-A10A
CT1
6 Maintenance
6.1
Alarm Specifications
The DYN4 servo drive is protected by 5 fault alarms. The S1 status indicator LED will flash to indicate
when an alarm is triggered. The specific alarm status can be read using the DMMDRV program.
♦ Internal Driver Status Readout
( 1 )
Connect the PC to the servo drive JP2 port using RS232 cable
( 2 )
Press Read on the Setting driver parameters and mode main screen.
( 3 )
The Driver Status box will display the current status of the Servo Drive.
Alarm
Cause
Recommended Correction
Over Voltage
The internal DC bus voltage has
exceeded the allowed maximum lev-
els. The input DC voltage is too high.
- Check and confirm the connections to
the servo motor.
- Check that the servo motor is driving a
mass appropriate to its size.
- Check for any mechanical irregularities
that might be preventing the motors to
move freely.
- Add an external regenerative resistor
Over Temperature
The servo drives protective thermal
resistor has detected an unusually
high temperature inside the drive.
The control power transistor tempera-
ture is too high.
- Check that the drives ventilation
openings and heat sink are not being
blocked.
- Consult the servo drives ambient
temperature specifications and check if
the operation conditions are met.
Lost Phase
The encoder has detected an
irresolvable position error in the mo-
tor relative to the command signal.
- Check that the encoder feedback cable
is securely plugged from the servo motor
to the JP3 port of the servo drive.
- Check for any mechanical irregularities
that might be preventing the motors to
move freely.
Over Power
The servo drive has experienced an
output power exceeding the rated
value relative to the average value.
- Check and confirm the connections to
the servo motor.
- Check that the servo motor is driving a
mass appropriate to its size.
- Check for any mechanical irregularities
that might be preventing the motors to
move freely.
Over Current
Servo drive internal current increased
above rated and protection levels.
- Check that the encoder feedback cable
is securely plugged from the servo motor
to the JP3 port of the servo drive.
- Check for any mechanical irregularities
that might be preventing the motors to
move freely.
