Honeywell SmartVFD HVAC2 Applications Manual page 131

NOTE: You can select control place by pressing
Loc / Rem button or with par. 2.5(Local /
Remote), P2.1 will have no effect in local
mode.
Keyp ad is the control place
Local =
Control place determined by P2.1
Remote =
Start function
The user can select two start functions for
SmartVFD HVAC2 with this parameter:
0 = Ramp start
The frequency converter starts from 0 Hz
and accelerates to the set frequency ref-
erence within the set acceleration time
(See detailed description: ID103). (Load
inertia, torque or starting friction may
cause prolonged acceleration times).
1 = Flying start
The frequency converter is able to start
into a running motor by applying small
current pulses to motor and searching for
the frequency corresponding to the speed
the motor is running at. Searching starts
from the maximum frequency towards the
actual frequency until the correct value is
detected. Thereafter, the output fre-
quency will be increased/decreased to the
set reference value according to the set
acceleration/deceleration parameters.
Use this mode if the motor is coasting when the
start command is given. With the flying start it is
possible to start the motor from actual speed
without forcing the speed to zero before ramping
to reference.
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