Woodward DSLC, Installation And Operation Manual, Page: 38 / 114

DSLC Digital Synchronizer and Load Control Manual 02007
32 Woodward
30. Reverse Pwr Level and Rev Pwr Time Delay are used to determine the
time delay before energizing the load switch output when the generator is
being motored, and the Reverse Power Trip is enabled.
Menu 3—Process Control
1.
Process Control Gain determines how fast the process control responds to
an error between the process variable and reference. The gain is set to
provide stable control of the process.
2.
Process Stability compensates for delay in the process control loop. It
prevents low frequency hunting and damping (overshoot or undershoot)
when a process disturbance occurs.
3.
Process Derivative adjusts the rate of change in speed bias output during
a process level transient.
4.
Process Deadband is the error window within which the process control
integrator is not updated. This is used for control of high noise processes.
Set to 0.0 mA for normal, non-deadband control.
5.
Process Droop is the load droop desired based on process level.
6.
Process Filter adjusts the bandwidth of the filter on the process input.
Higher frequency settings result in faster control response, but also more
response to process noise.
7.
Process Reference is the internal reference for the process control.
8.
Raise Reference Rate is the rate at which the process reference is
increased when the raise command input is activated.
9.
Lower Reference Rate is the rate at which the process is decreased when
the lower command input is activated.
10.
High Limit PU is the process input level where (if enabled) the High Limit
discrete output is energized and the high limit alarm is activated. The High
Limit PU set point also limits the maximum process reference setting.
11.
High Limit DO is the process input level where (if enabled) the High Limit
discrete output is de-energized and the high limit alarm deactivated.
12.
High Limit Alarm specifies if the process high limit alarm will activate (de-
energize) the alarm driver, terminal 28.
13.
Low Limit PU is the process input level where (if enabled) the Low Limit
discrete output is energized and the low limit alarm is activated. The Low
Limit PU set point is also the minimum process reference setting.
14.
Low Limit DO is the process input level where (if enabled) the Low Limit
discrete output is de-energized and the low limit alarm deactivated.
15.
Low Limit Alarm specifies if the low limit alarm will activate (de-energize)
the alarm driver, terminal 28.
16.
Process Switches specifies if the High and Low Limit discrete outputs,
terminals 26 and 27, will activate on high or low process alarm.