Woodward ProAct I, Product Manual

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Manual 04121 ProAct I/II
Woodward 27
Idle/Rated Contact
The Idle/Rated contact (open for Idle, closed for Rated) connects to terminal 17.
When the Idle/Rated contact is closed, the control immediately switches the fuel
limit to the maximum limit or torque limit (whichever is less) and ramps engine
speed to the rated speed set point (or the speed specified by the Remote Input
when the Remote Speed Setting input at terminal 21 is enabled). When the
Idle/Rated contact is opened, the control ramps engine speed to the idle speed
setting.
The idle set point cannot be set above the rated set point. The fuel limiters (start,
torque, and maximum) remain effective regardless of the Remote Reference
input.
Lower and Raise Speed Contacts
The Lower Speed contact connects to terminal 18. Raise and Lower inputs are
effective only if the control is in Rated. When the Lower Speed contact is closed,
the control lowers speed at a rate determined by the Lower Rate set point. When
the contact is open, speed remains at its current value. Closing the Lower Speed
contact will cancel the ramps started by the Idle/Rated contact.
The Raise Speed contact connects to terminal 19. When the Raise Speed
contact is closed, the control raises speed at a rate determined by the Raise
Rate set point. When the contact is open, speed remains at its current value.
Closing the Raise Speed contact will cancel the ramps started by the Idle/Rated
contact.
Closing both Raise and Lower contacts at the same time will disable Raise and
Lower speeds as long as both contacts are closed.
The Raise and Lower Speed contacts are disabled when the Remote Speed
Setting mode is selected.
Alternate Dynamics
The Alternate Dynamics contact connects to terminal 20. When this contact is
open, Dynamics set 1 is selected. When this contact is closed, Alternate
Dynamics is selected.
Remote Reference
When Remote Reference is selected by closing the contacts to terminal 18, the
Raise and Lower Speed inputs are disabled. The speed reference setting is
based on the value of current in the remote speed reference input. When the
contacts to terminal 21 are open and the Run/Stop switch is toggled, the Raise
Speed and Lower Speed inputs are enabled. The remote speed reference is a 4–
20 mA input. The remote speed reference range is tailored in menu 3.
A remote reference of less than 2 mA is considered failed, and the control will
remain at the last speed setting. To return to rated speed, the remote switch
must be open and the Run/Stop switch toggled.