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Configuration
June 2017
D Pressure Tune Cutoff Lo defines the low cutoff point for the pressure in percent (%) of pre‐characterized setpoint.
Below this cutoff, the pressure target is set to -23%. A Pressure Tune Cutoff Lo of 0.5% is recommended to help
ensure maximum shutoff seat loading. Pressure Tune Cutoff Lo is deactivated by setting it to -25.0%.
D Pressure Range Hi is the high end of output pressure range. Enter the pressure that corresponds with 100% valve
travel when Zero Power Condition is closed, or 0% valve travel when Zero Power Condition is open. This pressure
must be greater than the Pressure Range Lo.
D Pressure Range Lo is the low end of the output pressure range. Enter the pressure that corresponds to 0% valve
travel when Zero Power Condition is closed, or 100% valve travel when Zero Power Condition is open. This pressure
must be less than the Pressure Range Hi.
Output Synchronize
Output Sync allows a bumpless transition from travel control mode to pressure control mode in the event of control
feedback switch.
D Bleed Rate is the time, in %/sec, for the transition to the user-specified setpoint. Select Enable or Disable.
Travel Deviation Fallback
D Travel Deviation Fallback occurs when a gross deviation exists between set point and actual travel. It switches to
Pressure Control and no longer uses the travel sensor to position the valve Select Enabled or Disabled.
D Fallback Point is the point, in percent (%) of travel, at which the instrument switches to Pressure Control.
D Fallback Time is the time, in seconds, that is required to reach the Travel Deviation Fallback Point.
D Deadband defines the Travel Deviation Fallback Deadband in percent (%).
D Minimum Supply is the minimum air supply, in psi or percent (%), required for the pressure control mode to activate
during Travel Deviation Fallback
Travel Tuning Set
WARNING
Changes to the tuning set may cause the valve/actuator assembly to stroke. To avoid personal injury or property damage
caused by moving parts, keep hands, tools, and other objects away from the valve/actuator assembly.
There are eleven Travel Tuning Sets to choose from. Each tuning set provides a preselected value for the digital valve
controller gain settings.
Tuning set C provides the slowest response and M provides the fastest response. Table 3‐2 lists the proportional gain,
velocity gain and minor loop feedback gain values for preselected tuning sets.
In addition, you can specify Expert tuning and individually set the proportional gain, velocity gain, and minor loop
feedback gain. Individually setting or changing any tuning parameter or running the Performance Tuner will
automatically change the tuning set to X (expert).
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Instruction Manual
D103563X012
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Table of Contents
Troubleshooting
