Figure 15-20: Setting Of Minimum Load - Johnson Controls VSD Series User Manual

VSD Series Drives User Manual
716 Underload Protection
0
1
2
3
If tripping is set active the drive will stop and activate the fault stage. Deactivating the
protection by setting the parameter to 0 will reset the underload time counter to zero.
717 Underload Protection, Field Weakening Area Load
The torque limit can be set between 10.0 – 150.0% x T
This parameter gives the value for the minimum torque allowed when the output
frequency is above the field weakening point. See Figure 15-20.
If you change ID108 (motor nominal current), this parameter is automatically restored
to the default value.
718 Underload Protection, Zero Frequency Load
The torque limit can be set between 5.0 – 150.0% x T
This parameter gives the value for the minimum torque allowed with zero frequency.
See Figure 15-20.
If you change ID108 (motor nominal current), this parameter is automatically restored
to the default value.
15-24
No response
Warning
Fault, stop mode after fault according to ID402
Fault, stop mode after fault always by coasting
Torque
ID717
ID718
5 Hz

Figure 15-20: Setting of Minimum Load

For more information visit: www.johnsoncontrols.com
.
nMotor
Underload Area
f
Field Weakening
Point ID604
.
nMotor
Eaton Technology
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November 2009
LIT-1201828