Manual 37615C
SPM-D2-10 - Synchronizing Unit
Page 46/68
© Woodward
Parameter 5209
f control output
(max.) 000%
X
&
XN
Packages only:
'ANALOG' or 'PWM' setting '
Maximal value frequency controller
0 to 100%
This parameter permits the user to tailor the controller to their specific needs. This
value specifies the upper limit of the analog frequency controller output.
Example: The frequency controller requires a +/-4 volt input. The user would con-
figure a +/-5 volt signal in
and configure 90% here to limit the output to
+4 volts.
Parameter 5208
f control output
(min.) 000%
X
&
XN
Packages only:
'ANALOG' or 'PWM' setting
Minimal value frequency controller
0 to 100%
This parameter permits the user to tailor the controller to their specific needs. This
value specifies the lower limit of the analog frequency controller output.
Example: The frequency controller requires a +/-4 volt input. The user would con-
figure a +/-5 volt signal in
and configure 10% here to limit the output to
-4 volts.
Parameter 5510
Freq. controller
Gain Kp 000
X
&
XN
Packages only:
'ANALOG' or 'PWM' setting
P gain of the frequency controller
1 to 240
The proportional-action coefficient K
PR
indicates the closed-loop control system
gain. By increasing the gain, the response is increased to permit larger corrections to
the variable to be controlled. The farther out of tolerance the process is the larger the
response action is to return the process to the tolerance band. If the gain is config-
ured too high, the result is excessive overshoot/undershoot of the desired value (refer
to"Analog Controller Outputs" on page 28).
Parameter 5511
Freq. controller
Reset Tn 00.0s
X
&
XN
Packages only:
'ANALOG' or 'PWM' setting
Reset time load frequency controller
0.0 to 60.0 s
The reset time T
n
represents the Integral component of the PID controller. The reset
time corrects for any offset (between set point and process variable) automatically
over time by shifting the proportioning band. Reset automatically changes the output
requirements until the process variable and the set point are the same. This parame-
ter permits the user to adjust how quickly the reset attempts to correct for any offset.
The reset time constant must be greater than the derivative time constant. If the reset
time constant is too small, the engine will continually oscillate. If the reset time con-
stant is too large, the engine will take to long to settle at a steady state. The integral
is disabled when T
n
=0.00 s is configured here (refer to "Analog Controller Outputs"
on page 28).
Parameter 5512
Freq. controller
Derivat.Tv 0.00s
X
&
XN
Packages only:
'ANALOG' or 'PWM' setting
Derivative-action time frequency controller
0.00 to 6.00 s
The derivative-action time T
V
represents the Derivative component of the PID con-
troller. By increasing this parameter, the stability of the system is increased. The
controller will attempt to slow down the action of the throttle in an attempt to pre-
vent excessive overshoot
or undershoot. Essentially this is the brake for the process.
This portion of the PID loop operates anywhere within the range of the process un-
like reset. The derivative is disabled when T
V
=0.00 s is configured here (refer to
"Analog Controller Outputs" on page 28).
