Woodward GCP-30 Series User Manual

Manual 37365A GCP-30 Series Packages - Genset Control
Page 42/179 © Woodward
Parameter 49
Stepper sign.frq
(max.) 000%
BPQ, XPQ
Frequency controller: maximum value 0 to 100%
This parameter permits the operator to clamp or limit the upper limit of the analog
output signal.
Example:
A 1 to 4V analog output is needed for the voltage controller to operate
properly. A jumper is installed on terminals 8/9 as described above and the analog
output signal of 0 to 5V is selected. The number to be configured as the maximum
output signal in this parameter is determined by dividing the desired upper limit by
the range of the signal (4V/5V = 0.80 or 80%). 80% is the value to be configured in
this parameter.
Parameter 50
Freq.controller
gain Kpr 000
BPQ, XPQ
Frequency controller: P gain 1 to 240
The gain coefficient K
pr
specifies the Proportional portion of the PID control loop.
By increasing the gain, the response is increased to permit larger corrections to the
v
ariable 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 confi-
gured too high, the result is excessive overshoot/undershoot of the desired value.
Parameter 51
Freq.controller
reset Tn 00.0s
BPQ, XPQ
Frequency controller: reset time (integration) 0.0 to 60.0 s
The reset time T
n
identifies the Integral portion of the PID control loop. 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 out-
put requirements until the process variable and the set point are the same. This pa-
rameter 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 constant is too large, the engine will take an excessive amount of time to settle
at a steady state.
Parameter 52
Freq.controller
derivat.Tv 0.00s
BPQ, XPQ
Frequency controller: derivative-action time 0.00 to 6.00 s
The derivative-action time T
V
identifies the Derivative portion of the PID control
loop. By increasing this parameter, the stability of the system is increased. The con-
tro
ller will attempt to slow down the action of the actuator in an attempt to prevent
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.

Woodward GCP-30 Series Specifications

General

Brand	Woodward
Model	GCP-30 Series
Category	Controller
Language	English