Kollmorgen Troubleshooting
SERVO
STAR
®
SP3 Power Block
23
TROUBLESHOOTING
DISPLAY
The 7-segment display on the front of the drive indicates the status of the drive. When the drive
is disabled and there are no faults, the display is blank. When the drive is enabled, the decimal
point is lit.
When a fault condition occurs, the drive is disabled. The LED displays the cause of the fault so
you can readily determine the source of the problem. Faults are cleared by removing the cause of
the fault, and then toggling the drive enable signal. The drive over-current fault (P1) can only be
cleared by cycling the drive power. The following table shows the display fault codes and fault
description. The PMAC code is discussed in the next section.
Display PMAC
Code
(FCA-FCB-FCC-FCD)
Fault Description
t1 1011
Over-current
shut-down
t2 1011
Motor
over-temperature
t3
1011
Power amplifier over-temperature
o
1101
Power amplifier over-voltage
u
1110
Power amplifier under-voltage
≡
Watch
dog
P1 1001
Drive
over-current
P
1001
Power amplifier over-current
F
1100
PWM fault frequency
A1 1010
+12V
under-voltage
A2 1010
-12V
under-voltage
A3 1010
+5V
under-voltage
A4 1010
Reference
under-voltage
The following provides a description of some of the more important faults that may be detected
by the SP3:
Motor Over-temperature:
The Motor’s External Thermostat input is monitored for an open
circuit condition.
Drive Over-temperature:
The internal heat sink temperature is monitored for an unsafe
condition. The fault may be reset only after the drive cools.
Bus Over-voltage:
This fault may occur during a regen operation where the BUS is raised to
higher values than that produced by the power supply.
Bus Under-voltage:
This fault may occur if the incoming line voltage droops or if a problem
occurs in the power supply.
Power Stage Fault (Over-current):
Hardware circuitry monitors load short-circuit, transistor
failure, and instantaneous over-current. A power stage fault cannot be reset by toggling the
enable line, but only by cycling the power.
Feedback Loss:
Hardware detects a wire-break condition in encoder-based systems.
Power Supply Under-voltage:
Hardware monitors the analog
±
12 VDC supply for out of
tolerance voltages.
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