Pump-Flex Decel Mode - Toshiba TE2 Series Instruction Manual

Stop Command
(Bypass Contactor Opens)
F025: Begin Decel Level
(Immediate step down)
Full Speed
F026: Stop Level
(VMX Output Off)
F027: Decel Ramp Time
(Determines slope)
Time
Figure 5.6.5:
Pump-Flex Decel Ramp Settings
Caution!
Deceleration is THE OPPOSITE of braking. Enabling the Deceleration feature will make the
motor take LONGER to stop than if it were simply turned off.
TE2 Series Digital Solid State Soft Starter User Manual

5.6.5 Pump-Flex Decel Mode (F025 through F028)

Pump-Flex deceleration is a feature of the TE2 Series Soft Starter that
slowly decreases the applied voltage to the motor when a stop
command is given, resulting in a gentle decrease in motor torque.
Deceleration provides a way to extend the stopping time so that abrupt
stopping does not occur. Deceleration is useful with centrifugal pumps,
material handlers, and conveyors where abrupt stopping could be
damaging to the equipment and/or load.
SEE APPENDIX 2 AT THE END OF THIS MANUAL for typical Pump-

Flex Decel feature applications and more detailed descriptions of the
following functions.
F024 = Deceleration Ramp
Factory Setting = 0 (Disabled)
Range = 0 - 2
When F024 = 0, the deceleration feature is disabled.
When F024 = 1, the deceleration feature is enabled AND the overload
protection feature (F003 - F005) remains active (power off on
OL trip).
When F024 = 2, the deceleration feature is enabled and deceleration
will continue even when an overload condition trips.
WARNING!
Setting F024 = 2 presents significant risk of over-heating the
motor beyond its design limits which could result in motor
damage and fire hazard. Do this only in circumstances where
the potential for mechanical damage outweighs the risk of
motor damage.
F025 = Begin Decel Level (BDL)
Factory Setting = 60%
Range = 0 - 100% of line voltage
Used to drop voltage to a level where there is a noticeable
effect on motor torque during initial Decel mode.
F026 = Decel Shut Off Voltage
Factory Setting = 30%
Range = 0 to (BDL -1)%
Sets the level where the starter is turned off, corresponding to
where motor torque during Decel is no longer effective.
F027 = Decel Ramp Time
Factory Setting = 10 seconds
Range = 1 - 60 seconds
Sets the maximum time for the deceleration ramp to go from the
Begin Decel Level setting (F025) to the Decel Shut Off Voltage
(F026).
Note:
When using the Decel function, count these cycles as additional
"starts" when determining maximum starts-per-hour of the motor.
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