Continued
• If the setpoint is entered via the keypad, the entered setpoint needs to be
recalculated as follows:
Entered Setpoint = Max Value (n023 ) – Desired Setpoint
This effectively inverts the reference input.
EXAMPLE: Desired Setpoint is 43.0 Hz, Max. Value (n023 ) = " 60.0 " Hz.
Therefore, the entered setpoint is:
Entered Setpoint = 60.0 Hz – 43.0 Hz = " 17.0 " Hz.
This setpoint should be entered as " 17.0 " Hz.
• If PID feedback loss detection is used, the inverse of the desired feedback loss
detection level should be entered in n091.
EXAMPLE: Desired Feedback Loss Level = 7%.
Desired Fdbk Loss Det. Level = 100% – 7% = " 93 " %.
E. n085 : Feedback Calibration Gain Factory setting: 1.00
(PID Fdbk Gain)
Range: 0.00 to 10.00
This parameter is used to adjust the Feedback Signal level.
F. Feedback Loss Detection
n090 : Feedback Loss Detection Selection
(PID Fdbk Loss Sel)
n091 : Feedback Loss Detection Level Factory setting: 0 %
(PID Fdbk Loss Lvl)
Range: 0 to 100 %
n092 : Feedback Loss Detection Delay Time Factory setting: 1.0 seconds
(PID Fdbk Loss Time)
Range: 0.0 to 25.5 seconds
When enabled (n090 = "MF Output Only" (" 1 "), the drive will sense if the Feedback Signal
falls below the n091 level for more than the n092 delay time.
G. PID Settings
n086 : Proportional Gain Factory setting: 1.0
(PID P Gain)
Range: 0.0 to 10.0
Proportional gain is the value by which the error signal is multiplied to generate the
new speed reference.
(continued on next page)
5-47
5.22 PID CONTROL
LED Setting LCD Setting
0* Disabled*
1 MF Output Only
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