Kollmorgen MMC Smart Drive Series, Hardware Manual

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326 Kollmorgen - June 2014
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.
• Regenerative 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 11-3: Drive Status LED Fault Codes (Continued)
Fault
Code
Fault Possible Causes