Honeywell SmartVFD HVAC2 Applications Manual page 147

Acceleration time 1
Deceleration time 1
Ramp S-shape 2
Acceleration time 2
Deceleration time 2
These limits correspond to the time required for
the output frequency to accelerate from the zero
frequency to the set maximum frequency, or to
decelerate from the set maximum frequency to
zero frequency.
The user can set two different
acceleration/deceleration time and set two
different ramp s-shape for one application.The
active set can be selected with the selected digital
input (par. 5.11).
Flux braking
Instead of DC braking, flux braking is a useful
form of braking with motors of max. 15 kW.
When braking is needed, the frequency is reduced
and the flux in the motor is increased, which in
turn increases the motor's capability to brake.
Unlike DC braking, the motor speed remains
controlled during braking.
0 =
Off
1 =
Deceleration
2 =
Chopper
3 =
Full Mode
NOTE: Flux braking converts the energy into
heat at the motor, and should be used
intermittently to avoid motor damage.
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