210 Section 10 Governor Adjustments TP-6356 4/12
i. Make small Derivative value changes to
dampen out ringing in response to load
transients.
j. Increase the Integral to eliminate any steady-
state error in the engine’s speed and help
decrease error recovery time.
k. Increase the Overall Gain to improve response
time while keeping the ratios of the PID values
relative to each other constant.
2. Droop Calibration Procedure (load share model
only).
If droop calibration is required, go to step 2.a.
If droop calibration is not required, go to step 3.
Use this calibration procedure when droop is
required.
After droop calibration, the difference between the
No Load Cal and the Full Load Cal parameter
values should be greater than 100 for best
operation of droop. The droop function may still
work for smaller differences but with less
accuracy.
a. Open the line circuit breaker to disconnect the
load from the generator set.
b. Place the generator set master switch in the
RUN position to start the generator set.
c. Set the Set Speed A to 1800 rpm for 60 Hz
models and 1500 rpm for 50 Hz models if not
already completed.
d. Enter a value of 41 in the Password parameter
allowing editing of the droop related
parameters.
e. Select the % Droop parameter and adjust the
value to:
Selected Set Speed / [(1000 -- Value of % Droop) / 1000]
f. Allow the engine to stabilize at the No Load
droop speed and then press the governor
controller’s Enter key to set the percent droop.
No Load Calibration is now complete.
g. Select the Full Load Calibration procedure.
The engine speed will return to the selected set
speed.
h. Apply full load to the engine and allow the
speed to stabilize.
i. Wait 5 seconds and then press the governor
controller’s Enter key to record the calibration
value. Full Load Calibration is now complete.
j. Remove the load from the generator set. The
engine speed will increase to the no load droop
speed. Droop calibration is now complete.
k. Place the generator set master switch in the
OFF position to stop the generator set.
3. Update the governor controller and save the files.
a. Select WRITE ALL. The updated program is
then sent to the governor controller.
b. Save and store this modified PST file on your
PC hard drive, floppy disk, and/or CD-ROM for
future reference.
c. In an effort to help us build a more complete
data base, we request you share your
calibration values by filling out the Governor
Parameter Detail form. E--mail or fax the
completed form to us and after our review, we
will include the data in the Governor Parameter
Summary.
E-mail: generatorfieldservice@Kohler.com
Fax number: 920-803-4977.
4. Disconnect the governor controller from the user-
supplied PC.
a. Check that the generator set master switch is in
the OFF position.
b. Move the white lead/70A from the normally
closed K5 contact back to the normally open K5
contact. See Figure 10-16.
c. Disconnect the supplied cable included in the
kit from the user-supplied PC 9-pin RS-232
serial port and the governor controller RJ11
connector (phone jack).
d. Store the cable and CD-ROM together for later
use as needed.
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