Kollmorgen MMC Smart Drive

256 Kollmorgen - December 2011
MMC Smart Drive Hardware Manual - MAINTENANCE AND TROUBLESHOOTING
4
Drive I*t Too High
•The product of the drives
output current multiplied
by time has exceeded
allowed limits.
•If current foldback is
enabled the drive peak
output current
automatically reduces to
0.67% of DIpeak. If
foldback is not enabled,
the drive will fault.
•Mechanically-jammed motor.
•Motion profile acceleration requires
peak current for too long of a time
duration.
•Machine load on the motor increased
by friction.
•Wiring problem between drive and
motor yielding improper motion.Motor
commutation error.
•Drive under-sized for application,
friction or load.
5
Motor I*I*t Too High
•Motor current amplitude
squared multiplied by time
has exceed allowed limits
•Mechanically-jammed motor.
•Motion profile acceleration requires
peak current for too long of a time
duration.
•Machine load on the motor increased
by friction.
•Motor commutation error.
•Motor under-sized for application,
friction or load.
6
Optional Battery low
•Optional fault used to
indicate SFD battery
supply voltage is low
•Battery low fault enabled and battery
is not installed.
•SFD Battery backup voltage is low.
7
Bus Over Voltage - Self Re-
setting
•The BUS voltage has
exceed the upper
threshold limit
•AC Line voltage is too high.
•Regenative energy during
deceleration is causing the BUS to
rise (possible remedy: add regen
resistor).
9
Motor l-l or l-n Short
•Line-to-Line, Line-to-
Neutral or Line-to-PE short
on the motor output
causing an instantaneous
over current.
•Motor power wiring short circuit - line-
to-ground /neutral.
•Motor cable short line-to-line.
•Motor power cable length exceeds the
data sheet specification causing
excessive motor line-to-earth ground/
neutral capacitance.
•Internal motor winding short circuit.
•Motor L too small.
•KIP set too large.
Table 10-3: Drive Status LED Fault Codes (Continued)
Fault
Code
Fault Possible Causes