Page 4–48
DURApulse GS4 AC Drive User Manual – 1st Ed, Rev A - 10/20/2017
Chapter 4: AC Drive Parameters
Type Hex Addr Dec Addr
P1.29 Deceleration Method
R/W 011D 40286
Range/Units (Format: 16-bit unsigned) Default
0: Normal Ramp Deceleration
1: OverFluxing Deceleration
2: Traction Energy Control
0
Setting 0: Normal Ramp Deceleration
Deceleration or stop will occur according to the deceleration method determined by the settings
of P1.00, P1.02, P1.04, P1.06, or P1.08.
Setting 1: OverFluxing Deceleration
The drive will control the deceleration time according to the Over-Voltage Stall Prevention Level
(P6.27) setting value and DC BUS voltage.
•
If the DC BUS > 95% of P6�27 Over-Voltage Stall Prevention setting value, the drive will enable
Over Fluxing Deceleration method only if P6�11=0 ((Enable Over-Voltage Stall Prevention)�
•
If the Over-Voltage Stall Prevention P6�11=0, the drive will enable Over Fluxing Deceleration
method according to the operating voltage and DC BUS regenerative voltage� This method will
use the Deceleration Time setting (P 1�02 or P1�04 or P1�06 or P1�08)� The actual deceleration time
will take longer than the deceleration time setting because of the Over-Voltage Stall Prevention
function�
•
When P1�29=1, use the parameter Over-Voltage Stall Prevention P6�12=1 to get a better over
voltage suppression effect during deceleration�
Setting 2: Traction Energy Control
This function is based on the ability of the drive to auto-adjust output frequency and voltage
in order to get faster DC BUS energy consumption, and the actual deceleration time will be as
consistent as possible with the deceleration parameter set-up time. If the real deceleration time is
longer than the programmed deceleration time (this can cause over-voltage faults), use P1.29=2 to
attempt to shorten the deceleration time.
Note – Comparison of Settings 1 & 2:
P1.29=1 (OverFluxing) limits deceleration by monitoring the DC bus level. This method is smoother
than Traction Energy Control.
P1.29=2 (TEC) will attempt to prevent an OV (Over-Voltage) fault with faster deceleration and higher
current. TEC controls limits decel by monitoring current (limiting output to Rated Current).
please also see Note at p6.12 (over-voltage stall preveNtioN).
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