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ID
Parameter
CL
Setting range
[Default]
Description
This parameter permits the user
to adjust how quickly the reset
attempts to correct for any offset.
Notes
The integral gain constant must
be greater than the derivative
time constant. If the integral gain
constant is too large, the engine
will continually oscillate.
If the integral gain constant is too
small, the engine will take too
long to settle at a steady state.
This parameter is only visible if
frequency control (parameter
) is configured to "PID
analog".
5512
Derivative ratio
2
0.01 to 100.00
[0.01]
The derivative ratio identifies the
D part of the PID controller.
By increasing this parameter, the
stability of the system is
increased. The controller 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 unlike reset.
Notes
This parameter is only visible if
frequency control (parameter
) is configured to "PID
analog".
The default configured controller
acts like a PI controller what is the
valid D part setting for systems
with secondary controllers.
5550
Deadband
1
0.02 to 9.99 Hz
[0.08 Hz]
islanded operation
The generator frequency is
controlled in such a manner that
the measured frequency does not
deviate from the configured
setpoint by more than the value
configured in this parameter
without the controller issuing a
frequency raise/lower signal to the
frequency control.
This prevents unneeded wear on
the frequency bias output control
or the raise/lower relay contacts.
Example
• If the frequency setpoint is
•
50 Hz and a deadband of 0.5
Hz is configured, the
344
easYgen-3000XT Series
B37574
4 Configuration
4.4.4.4 Frequency Control
Released