Lenze SCD Series User Manual
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NOTE 3: If this parameter is changed while the drive is running, the change will not take effect until
the drive is stopped. Therefore, the allowable maximum frequency for drives with the High Output
Frequency option (see NOTE 1) will not change if the carrier frequency is changed while the drive is
running.
P03
START METHOD
01
NORMAL: The drive will start when the appropriate contact is closed on the terminal strip, or
by pressing the START key on the optional remote keypad. See Parameter 14.
02
START ON POWER UP: The drive will automatically start upon application of input power.
03
START WITH DC BRAKE: When a START command is given, the drive will apply DC
BRAKE VOLTAGE (Parameter 22) for the duration of DC BRAKE TIME (Parameter 21) prior
to starting the motor to ensure that the motor is not turning.
04
AUTO RESTART WITH DC BRAKING: Upon a START command, after a fault, or upon
application of power, the drive will apply DC BRAKE VOLTAGE (Parameter 22) for the duration
of DC BRAKE TIME (Parameter 21) prior to starting (or restarting) the motor.
05
FLYING RESTART 1: LOW performance. Slowest synchronization and lowest current level.
This setting results in the smoothest synchronization.
06
FLYING RESTART 2: MEDIUM performance. Faster synchronization and higher current
level. This setting allows faster synchronization while retaining smoothness.
07
FLYING RESTART 3: HIGH performance. Fastest synchronization and highest current level.
This setting allows the fastest synchronization, but sacrifices smoothness.
The FLYING RESTART 1 - 3 settings allow the drive to start into a spinning load after a fault or
upon application of input power. They differ in the time required to find the motor and the amount of
current required to synchronize with it. The faster the drive attempts to find the motor, the more
current is required.
When programmed for auto-restart, the drive will attempt three restarts after a fault. The interval
between restart attempts is 15 seconds for setting 04, and 2 seconds for settings 05, 06 and 07.
During the interval between restart attempts, the display will read “SP” to indicate Start Pending. If
all three restart attempts fail, the drive will trip into FAULT LOCKOUT (displayed “LC”) and require
a manual reset. Refer to Section 16.0 - TROUBLESHOOTING.
NOTE: Settings 02 and 04 - 07 require a two-wire start/stop circuit to operate. The RUN contact
must remain closed for the power-up start and auto-restart functions to operate.
WARNING!
Automatic starting of equipment may cause damage to equipment and/or injury to personnel!
Automatic start should only be used on equipment that is inaccessible to personnel.