Manual 26727
VariStroke-I (VS-I) Electro-hydraulic Actuator
Woodward
73
Saving the Calibration Settings
To save the new “Offset at Minimum Position” and “Maximum Stop Position” settings, press the “Save
Calibration” button.
Press the “Cancel/Revert Calibration” button to discard the changed values and to exit the calibration.
Manual Operation
To prevent personal injury or death and damage to equipment, the
controlled prime mover must not be allowed to run or operate during
any of the following procedures. The main steam valve or main fuel
control must be turned off to prevent operation of the controlled
system.
To enable manual Operation the RUN ENABLE line must be low and/or the analog input demands must
be at less than 2 mA (0 mA recommended). The VS-I can be put into manual mode by pressing the
Manual Operation button. The VS-I can be returned to normal operation by pressing the Exit button, by
enabling Run Enable, or by supplying an analog input demand level.
When the VS-I is in manual mode, you can enter a desired position. The VS-I will move the final cylinder
to that position at a rate given on the Configuration page. If the VS-I is in normal operation, this page can
be used just to track that operation.
Press the “Start” button in the upper left hand corner of the graph to view trending data.
Manual Operation Page
Once the Manual Operation button is pressed, the following screen displays below the trend chart.
Monitor and view actuator movement using this trend chart. To do so, press “Start” at the top left corner of
the trend chart. To change the cylinder position, change the Position Request value (see below).
Figure 5-8. Manual Operation Screen
Released