Honeywell HVAC400x Applications Manual page 122

HVAC400X – APPLICATION MANUAL
In some processes, it may be necessary to avoid some frequencies because they cause mechanical resonance.
P3.7.4 PROHIBIT FREQUENCY RANGE 2 HIGH LIMIT (ID 512)
You can use this parameter to prevent the drive operating on the prohibited frequencies.
In some processes, it may be necessary to avoid some frequencies because they cause mechanical resonance.
P3.7.5 PROHIBIT FREQUENCY RANGE 3 LOW LIMIT (ID 513)
You can use this parameter to prevent the drive operating on the prohibited frequencies.
In some processes, it may be necessary to avoid some frequencies because they cause mechanical resonance.
P3.7.6 PROHIBIT FREQUENCY RANGE 3 HIGH LIMIT (ID 514)
You can use this parameter to prevent the drive operating on the prohibited frequencies.
In some processes, it may be necessary to avoid some frequencies because they cause mechanical resonance.
B
C
A. Actual Reference.
B. High Lim.
P3.7.7 RAMP TIME FACTOR (ID 518)
You can use this parameter to set the multiplier of the selected ramp times when the output frequency of the drive
is between the prohibited frequency limits.
The Ramp Time Factor sets the acceleration and the deceleration time when the output frequency is in a prohibited
frequency range. The value of the Ramp Time Factor is multiplied with the value of P3.4.2 (Acceleration Time 1) or
P3.4.3 (Deceleration Time 1). For example, the value 0.1 makes the acceleration/deceleration time ten times
shorter.
EN2B-0417GE51 R0719
A
C
Fig. 25. The prohibited frequencies
B
Legend
C. Low lim.
D. Requested Reference.
122
D