Honeywell SmartVFD HVAC2 Applications Manual page 166

UNDERLOAD PROTECTION: FIELD
WEAKENING AREA LOAD
The torque limit can be set between 10.0-150.0 %
x T .
nMotor
This parameter gives the value for the minimum
torque allowed when the output frequency is
above the field weakening point. If you change
parameter P1.4 (Motor nominal current) this
parameter is automatically restored to the default
value.
UNDERLOAD PROTECTION: TIME
LIMIT
This time can be set between 2.0 and 600.0 s.
This is the maximum time allowed for an
underload state to exist. An internal up/down
counter counts the accumulated underload time.
If the underload counter value goes above this
limit the protection will cause a trip according to
parameter P12.6). If the drive is stopped the
underload counter is reset to zero. See Figure
"underload counter" on page 166.
Par .12.16
Underload
No underl.
Fig. 64. underload counter
Input phase fault
0:
No action
1:
Alarm
2:
Fault: Stop function
3:
Fault: Coast
166
Underload time counter
Trip area
Trip/warning
Par .12.6
Time
31-00108—07