Manual 26727
VariStroke-I (VS-I) Electro-hydraulic Actuator
Woodward
79
Linearization
This table is used to linearize steam flow to actuator position. It can only be modified when the actuator is
shut down.
Figure 6-4. Linearization Screen
Enabled / Disabled:
Enables or Disables the demand curve (linearization) functionality.
Linearization Table Order Incorrect:
This Alarm will activate if the Analog Position values are not set in
numerically increasing order (from top to bottom)
Analog Position (%):
These are analog demand positions that will be converted to the Scaled Analog
Position when the Linearization Curve is enabled.
Scaled Analog Position (%):
These are the cylinder output positions (steam valve position) that will
result when the demand is equal to the values put in to the Analog Position column.
Alarms/Shutdown
Alarms/Shutdown Page
This page displays the diagnostic information on the most typical Alarms and Shutdowns. These
diagnostics as well as more advanced diagnostics are shown on the “System Status” page. Some of the
Alarms and shut downs are configurable.
Logged errors contained in non-volatile memory until you reset the log.
Illuminated Alarm/Shutdown LEDs show the active state. You can reset the error system to clear the
current flags, but any that are still active will remain set.
Chapter 7: Troubleshooting describes these errors and their remedies.
Released