Woodward 723PLUS Technical Manual page 65

Manual 26482
15 ACT CUR DEV EXCEEDED (T/F)—A "TRUE" displayed indicates that the
actuator current deviation between the engines has exceeded the maximum
deviation for the specified time limit.
16 RESET ALL ALARMS (T/F)—Toggle this value from "FALSE" to "TRUE" to
reset any of the alarms once they have been cleared. This will also reset any
major alarms.
E**DYNAMICS DE-CLUTCHED**
01 IDLE GAIN 1 (*0.01–500.0)—The gain is set to provide stable control of the
engine at low or idle speed conditions
02 RATED GAIN 1 (*0.01–500.0)—The gain is set to provide stable control of the
engine at rated speed conditions.
03 RESET 1 (*0.01–50.0 sec)—Reset compensates for the lag time of the
engine. It adjusts the time required for the control to return the speed to zero
error after a disturbance. Reset is adjusted to prevent slow hunting and to
minimize speed overshoot after a load disturbance.
04 ACT COMP 1 (*0.01–1.0 sec)—Set this value for the time constant of the
actuator and fuel system. Typical values are at 20–25% of the reset.
05 GAIN RATIO 1 (*1.0–20.0)—Set this value to the desired gain ratio multiplier
when the speed error is outside of the window width.
06 WINDOW WIDTH 1 (*0.01–150.0 rpm)—Set this value for the desired speed
error window (±) width.
07 GAIN SLOPE 1 (*0.01–20.0)—Set this value for the desired gain slope
beyond the gain break point.
08 GAIN BKPT 1 (*0.01–100.0%)—Set this value for the desired percent actuator
output above which Gain Slope becomes effective.
09 SPEED FILTER 1 HZ (*0.5–20.0 Hz)—Set this value to the cutoff frequency
found by using the formula in Chapter 3. This is the roll-off frequency for the firing
torsional filter. This filter is active when dynamics 1 is selected.
10 INITIATE BUMP—Tests the dynamics settings by temporarily applying a
decreased fuel demand transient to stimulate a control response. Both the
magnitude (ACT BUMP LEVEL) and duration (ACT BUMP DURATION) of the
transient may be set under service menu *RESPONSE TESTING*. To initiate an
actuator bump, toggle INITIATE BUMP to TRUE then back to FALSE while the
engine is operating in a normal steady state loaded or unloaded condition.
Woodward
Be prepared to change the dynamics settings since the actuator
bump transient may stimulate instability.
BUMP ENABLE must be set TRUE to enable the BUMP ACT function.
See service menu *RESPONSE TESTING.
723PLUS Digital Marine Control
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