Honeywell SmartVFD HVAC MR4 User Manual page 141

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• 69
NOTE: The ramp time optimizer only affects the settings of Ramp 1. Ramp 2 will not be modi-
fied.
Output frequency
Maximum
frequency
M3.4.16 F
LUX BRAKING
Instead of DC braking, flux braking is a useful way to raise the braking capacity in cases where
additional brake resistors are not needed.
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.
The flux braking can be set ON or OFF.
NOTE: Flux braking converts the energy into heat at the motor, and should be used intermit-
tently to avoid motor damage.
M3.5.1.10 R
UN ENABLE
Contact open: Start of motor disabled
Contact closed: Start of motor enabled
The drive is stopped according to the selected function at M3.2.5. The follower drive will always
coast to stop.
M3.5.1.11 R
UN INTERLOCK
M3.5.1.12 R
UN INTERLOCK
The drive cannot be started if any of the interlocks are open.
The function could be used for a damper interlock, preventing the drive to start with damper
closed.
M3.5.1.16 P
RESET FREQUENCY SELECTION
M3.5.1.17 P
RESET FREQUENCY SELECTION
M3.5.1.18 P
RESET FREQUENCY SELECTION
Connect a digital input to these functions with the programming method presented in chapter
3.5.2) to be able to apply Preset frequencies 1 to 7 (see Table 53 and pages 37, 40 and 68).
HW100 K29.fh11
Figure 11.
1
2
New deceleration time
(Old optimizing percentage)
Old deceleration
time
0
1
2
HVAC A
PPLICATION
Time