Manual 26727
VariStroke-I (VS-I) Electro-hydraulic Actuator
Woodward
64
Shutdown LED:
When this LED indicator is illuminated, this invokes a shutdown condition. The unit
receives a command to shut down or has detected an operating condition, which
adversely affects the unit’s ability to operate reliably and predictably. Refer to Chapter
7 for a list of shutdown conditions.
Alarm LED:
When this LED indicator is illuminated, the unit has detected an operating condition,
which is outside of recommended operating parameters, but the VS-I is still operating.
The cause of alarm conditions should be determined and corrected to prevent damage
to the turbine, VS-I, or other auxiliary equipment. Refer to Chapter 7 for a list of Alarm
conditions.
Operating Mode:
Shows the status of the driver. Possible states are:
STARTUP - Initialization is in progress
SPRING_CHK - Initialization of the system is currently testing the spring.
ANALOG_DMD - Normal operating mode when the cylinder position is selected by the analog input
demand signals(s). There is an option of one or two demand signals on the Input configuration page.
SHUTDOWN - This “smart” button only appears when the VS-I is running and can be shut down. This
state may have occurred because the analog inputs are not in the 4–20 mA range, or the Run Enable
discrete input is selected and not on, or the Shutdown button has been pressed. After checking that the
analog demands and the Run Enable are OK, refer to Chapter 7 for a list of Shut down conditions if the
problem persists.
CONFIGURATION - The system is ready to receive the configuration or calibration information. When this
process is completed and saved, turn on the input signals to re-enable normal operation.
CSD_FETS -This means the system is shut down due to a critical error. Please check your input power
and connections and then reset the system. If the problem persists, service may be required.
CSD_CURR - The system is shut down due to a critical error. Please reset the system. If the problem
persists, service may be required.
CSD_SERVO - The system is shut down due to a critical error. Please check the connections to the final
cylinder feedback and then reset the system. If the problem persists, service may be required.
Demand and Feedback:
The Demand and Feedback indicators show the current demanded position and
measured feedback position of the final cylinder.
Shutdown Button:
Pressing this button will invoke a shutdown condition.
Navigation Buttons:
Pressing these buttons will navigate you to the most commonly used pages of the VS-I
Service Tool. You may access pages by using the dropdown menu at the top of the
Toolkit Window.
Released