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7-2 Troubleshooting MN1901
7.2 MintDrive
II
indicators
7.2.1 St atus display
The Status LED display indicates general MintDrive
II
status information.
Some characters will flash to indicate an error.
Drive / comms watchdog. Interprocessor communications failure.
This is potentially a severe problem if it occurs repeatedly. Communications failure
could indicate a process locking out the interprocessor communications. Clear the
error; if the problem persists then contact Baldor technical support.
Over volts. The DC Bus voltage has exceeded the powerbase overvolts level (see
DRIVEBUSOVERVOLTS). Check the DC Bus level being fed into the system (see Mint
keyword DRIVEBUSVOLTS). This should be close to the nominal voltage (see Mint
keyword DRIVEBUSNOMINALVOLTS). Ensure that your input voltage is relevant to the
voltage rating of your drive. If the input voltage is correct, then this error may be the
result of high deceleration rates. If it is not possible to reduce the harshness of the
deceleration rate, then a regeneration resistor should be used. To help you, use Mint
WorkBench capture facility to monitor the DC Bus level during moves.
Integrated Power Module (IPM) trip.
The unit’s powerbase has been overloaded. This should not happen in normal use if
limits have been configured correctly. See the Mint keyword CURRENTLIMIT and
related commands.
Current trip. Instantaneous over-current trip.
One or more of the 3 motor phases has exceeded 300% of Drive Rated Current.
Under volts. The DC Bus voltage has dropped below the powerbase undervolts level
(see DRIVEBUSUNDERVOLTS). This error will only be generated if the drive is in the
enabled state. As with the overvolts error, check the input voltage being fed into the
system. The error could also occur during high acceleration profiles.
Feedback trip. Can be enabled/disabled using FEEDBACKFAULTENABLE.Five
consecutive errors (or five errors in any 500 servo tick period) will cause the drive to
trip. This error indicates loss of encoder/resolver feedback and may indicate that the
feedback cable has become detached or one of the signals has broken. Check the
wiring in the Feedback cable; check for noise immunity; check the feedback device
fitted to the motor (if possible).
Motor or Drive trip. The motor I
2
T or the drive I.T current protection algorithms have
exceeded their limit and tripped the drive (disabled it). Check DRIVEERROR or the Error
Log to determine which error has occurred.
The motor and drive current limits are fixed according to the database parameters. The
drive can demand peak current for a short duration (see DRIVEPEAKDURATION),
thereafter it will trip or Foldback according to the setting of DRIVEOVERLOADMODE.The
same is true for the motor (see MOTORPEAKDURATION and MOTOROVERLOADAREA).
Use the Foldback option to automatically foldback the current to a level where the
drive/motor can recover.
(Symbol not flashing)
Motor I
2
T / It foldback. Motor I
2
T or Drive I.T algorithm has resulted in the demand
current being folded back to a level where the drive/motor can recover. The motor /
drive can run with demand currents greater than their rated value for a period of time;
after that time the drive will either trip or automatically foldback the demand current.
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