6 - Parameter Descriptions
69
PFN 04 / P21
Under Current Level
LCD / LED
Displays
PFN: Undr Cur Lvl
04 Off
Range
Off, 5 – 100% (Default: Off)
Description
The Under Trip Current Level sets the low field current trip level. This parameter should be set to the lowest
continuously allowable field current. Consult the motor manufacturer if necessary.
A relay can be programmed to change state when an over current alarm condition is detected.
See Also
• Under Current Time (PFN 05 / P22) on Page 69.
PFN 05 / P22
Under Current Time
LCD / LED
Displays
PFN: Under Cur Tim
05 15%
Range
Off, 0.1 – 90.0 seconds (Default: 1.0)
Description
The Under Current Trip Time parameter sets the period of time that the motor field current must be less than
the Under Current Level (PFN 04) parameter before an under current fault and trip occurs.
If “Off” is selected, the over current timer does not operate and the controller does not trip. It energizes any
relay set to Under current until the current raises or the controller trips on an overload.
Under Current Time
PFN 05
Time
Under Cur Level
PFN 04
Current Setpoint
QST 01
% Current
Alarm
Condition
Fault
Trip
OFF
1
.0
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