Woodward 2301E, Инструкция по установке и эксплуатации, Страница: 29 / 182

Manual 26641 2301E Digital Control
Woodward 19
The input switch or relay contact used to activate the Raise Speed/Load
command connects to terminal 38 (Discrete Input E). This discrete input changes
the control operation by increasing the speed reference ramp when the CB Aux
input is open, and by increasing the base load reference when in base load
mode. The speed reference ramp can increase only to a software adjusted
RAISE SPEED limit. The base load reference ramp can increase only to a
software adjusted BASE LOAD MAXIMUM limit. Both ramps increase at software
adjusted rates. De-selecting the Rated Speed command (described above) takes
command control away from the Raise Speed/Load input and effectively disables
the command.
With the contacts open (discrete input in the “FALSE” state), the control will stop
raising the speed or base load reference. Maintained simultaneous closure of this
Raise Speed/Load contact along with the Lower Speed/Load contact enables the
Remote Reference Input. The logic function of this input can be modified to be
normally open or normally closed.
Lower Speed/Load Contact (Terminal 39)
(Discrete Input F)
The input switch or relay contact used to activate the Lower Speed/Load
command connects to terminal 39 (Discrete Input F). This discrete input changes
the control operation by decreasing the speed reference ramp when the CB Aux
input is open, and by decreasing the base load reference when in base load
mode. The speed reference ramp can decrease only to a software adjusted
LOWER SPEED limit. The base load reference ramp can decrease only to a
software adjusted BASE LOAD MINIMUM limit. Both ramps decrease at a
software adjusted rate. De-selecting the Rated Speed command (described
above) takes command control away from Lower Speed/Load input and
effectively disables the command.
With the contacts open (discrete input in the “FALSE” state), the control will stop
lowering the speed or base load reference. Maintained simultaneous closure of
this Lower Speed/Load contact along with the Raise Speed/Load contact enables
the Remote Reference Input. The logic function of this input can be modified to
be normally open or normally closed.
Remote Speed Setting (Both Raise and Lower
Contacts; Terminals 38 and 39)
(Discrete Inputs E & F)
Close both the Raise Speed/Load discrete input (terminal 38) and the Lower
Speed/Load (terminal 39) to put the control into the remote speed setting input
mode. Analog input number one or number two must be set to *2, Remote Speed
Set Point or Baseload Setpoint. When the control is in remote droop or
isochronous mode the Remote Speed setpoint moves the Speed Ramp to the
same value as the Remote Speed setpoint.