Rockwell Automation 1336VT AC DRIVE 5-300AMP (2-160KW) PROGRAMMING MANUAL - Manual (Page 24)

Local and Serial Port Parameters
Firmware Version 1.01-3.01
Chapter 3
3-10
Parameter 12 Ċ DC Hold Time
Freq P R
P R Enter Seconds
0
15
0
Read and Write
Units
Minimum Value
Maximum Value
Factory Setting
The time represented by this value affects drive stopping performance.
Parameter 10 determines how this parameter value is used.
When Parameter 10 is set to 0, Parameters 12 and 13 should also be set to
0. When the drive receives a Stop command, DC Hold Time represents
how long the last speed command value will be retained in memory. If the
drive is restarted within this time frame, the drive resumes its last speed
command without accelerating from zero speed. If the elapsed time
between a Stop and a Start command is longer than the DC Hold Time, the
drive will restart at zero speed and follow the standard start sequence.
When Parameter 10 is set to 1 and the drive receives a Stop command,
drive output frequency to the motor stops. A DC Hold Voltage is sent to
brake the motor for a time equal to the DC Hold Time. If a Start command
is received within the DC Hold Time, the drive will remove DC Hold
Voltage from the motor and re-accelerate back to set speed. If a Start
command is received after the DC Hold Time, the drive will follow the
standard start sequence.
When Parameter 10 is set to 2, the drive output frequency will
ramp-to-stop after which a DC Hold Voltage will be applied to the motor
for a time equal to the DC Hold Time. If a Start command is received
within the DC Hold Time, the drive will remove the DC Hold Voltage and
accelerate from 0 Hz to set speed. If a Start command is received after the
DC Hold Time, the drive will follow the standard start sequence.