User`s manual

A-16 Motion Mate™ DSM314 for Series 90™-30 PLCs User's Manual – January 2001 GFK-1742A
A
2. The motor may be operating in violation of duty cycle restrictions. Calculate the amount of
cooling time needed based on the duty cycle curves published for the particular motor.
3. The motor may be over loaded. Check for excessive friction or binding in the machine.
4. For all the above problems, allow ten minutes cooling of the amplifier with minimum or no
motor loading then cycle amplifier power to reset.
FAL (Fan Alarm):
The cooling fan has failed.
1. Check the fan for obstructions or debris. With amplifier power removed attempt to manually
rotate the fan.
2. For SVM type amplifier systems the power supply module (PSM) and the servo amplifier
module each include a cooling fan. The alarm code will indicate which unit failed.
3. Some amplifiers have field replaceable fan units. If a replacement fan unit is not available,
replace the amplifier.
HC, HCL, etc. (High Current Alarm):
Motor current is excessive. For
α
Series amplifiers the
suffix (L, M, N, etc.) indicates which axis is in alarm
1. Motor power wiring (U, V and W) may be shorted to ground or connected with improper
phase connections. Check the wiring and connections. Check the servomotor for shorts to
motor frame. Replace the motor if shorted.
2. Improper motor type code may be configured or excessive values for tuning parameters.
Confirm that the proper motor is configured and lower gain values.
3. The amplifier maintenance manual will describe the procedure for monitoring motor current
signals (IR and IS). If the waveforms are abnormal replace the amplifier. If excessive noise is
observed check grounds and especially the cable shield grounds for the command cable (K1)
to the amplifier.
4. The motor may be operating in violation of duty cycle restrictions. Calculate the amount of
cooling time needed based on the duty cycle curves published for the particular motor.
5. The motor may be over loaded. Check for excessive friction or binding in the machine.
6. For all the above problems, allow ten minutes cooling of the amplifier with minimum or no
motor loading then cycle amplifier power to reset.
LV (Low Voltage Control Power Alarm):
The control voltage used to operate the low-voltage
circuitry in the amplifier is too low.
1.
α
Series SVU type amplifiers will be shipped with default jumpers to use a single phase of
the 220 VAC power to the amplifier. Optionally the user may remove the jumpers and
connect 220 VAC control power separately. Check that a minimum 200VAC is available on
terminals L1C and L2C for default installation or on connector CX3 (Y Key) for separate
control power.
2. Check the amplifier fuse. If the fuse is open replace with a new fuse after checking control
power voltage. If the second fuse blows open, replace the amplifier.
DBRLY (Dynamic Brake Relay Failure):
This alarm indicates that the contacts of the braking
relay are welded together. Replace amplifier immediately.
IPML, IPMM, etc. (IPM Alarm):
The Intelligent Power Module (IPM) is the high current
switching device in the amplifier. The IPM can detect over-current, over-heat or low-voltage
conditions in the power switching circuitry. The suffix (L, M, N, etc.) indicates which axis is in
alarm