Lenze MC3000 Series - Manual (Page 57)

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POWER UP and AUTO 1 - 3 settings are only active when the drive is in REMOTE mode
(refer to Parameter 30 - CONTROL) .
When set for AUTO 1, 2, or 3, the drive will attempt five restarts after a fault . During the
interval between restart attempts, the drive will display START PENDING to indicate that
the equipment will automatically restart . If all five restart attempts are unsuccessful, the
drive will trip into FAULT LOCkOUT, which requires a manual reset . Every 15 minutes that
passes will decrement the restart counter by one . Therefore, 75 minutes after a successful
restart, the restart counter is fully reset, and the drive can once again attempt five restarts .
NOTE 1:
When set for AUTO 1, 2, or 3, only the first two restart attempts will perform
a speed search to start into a spinning load . The last three restart attempts
will apply DC braking (at the voltage level programmed into Parameter 12
- DC BRAkE) for 15 seconds and then start from zero speed .
NOTE 2: The drive WILL NOT restart after a CONTROL or PWR SAG fault . Also, if an
OUTPUT fault occurs below 1 .5 Hz, only one restart will be attempted, after
a 30 second delay . If unsuccessful, it will then trip into FAULT LOCkOUT,
which requires a manual reset . This is done to protect the drive in case of
a shorted motor .
26 STOP (STOP MODE)
This parameter selects whether the motor will COAST to a stop, or RAMP to a stop, when
the drive is given a stop command .
COAST
When a stop command is given, the drive shuts off the output to the motor,
allowing it to coast to a stop . In this mode, the time it takes the motor to
stop is governed by the inertia of the driven load .
RAMP When a stop command is given, the drive will decelerate the motor to a
stop over a period of time according to Parameter 9 - DECEL . Once the
output frequency reaches 0 .0 Hz, there will be a 200 ms delay before the
drive can be started again .
RAMP 2 Same as RAMP, but without the 200 ms start delay . This allows faster start/
stop cycles for applications that require it .
28 AUTO / MAN (AUTO / MANUAL SPEED CONTROL)
This parameter determines how AUTOMATIC and MANUAL speed control is selected,
and affects the functionality of the AUTO/MAN key on the keypad .
A/M LOC
The AUTO/MAN key on the keypad is active only when the drive is in LOCAL
mode . In REMOTE mode, the AUTO/MAN key is disabled .
AUTO The drive will respond to a 0-10 VDC signal, 4-20 mA signal, or one of the
four PRESET SPEEDS, depending on the programming of terminals TB-
13A, TB-13B and/or TB-13C . The AUTO/MAN key is disabled .
NOTE: If no AUTO reference is selected using TB-13A, TB-13B or TB-13C,
speed control defaults to the keypad .
MANUAL The drive will respond to the p and q keys on the keypad . The AUTO/
MAN key is disabled .
A/M SPD The AUTO/MAN key is always active .
NOTE: If the drive is switched from LOCAL to REMOTE mode, speed
control will switch to AUTO . If the drive is switched from REMOTE
to LOCAL mode, speed control will switch to MANUAL mode . The
AUTO/MAN key can then be used to select the desired mode .