General Information
Chapter Six: Operation in Tuning Mode
156
Tuning Mode is Used when Performing the Following Procedures
Tuning Mode Functions
Change the valve position
This feature is only functional if the [
MANUAL
] or
[
HOLD
] legend is displayed. The current valve position
becomes editable.
Adjust the Base parameter
Base is defined as the smallest user-defined value for the
valve control signal output. In effect, this limits how
closed the valve can become. Note: The Base parameter
can override the Softstart parameter.
Adjust the Start parameter
The Start value is used to set the initial position of the
valve when the
AUTO
feature is evoked in Control
Mode. The Start value only applies if the valve was at
full open or full close just prior to evoking the
AUTO
feature. Note: If Softstart is enabled, it can override the
Start parameter.
Adjust the Integral parameter
The Integral parameter selects the time constant used for
the integral term of the PID control.
Adjust the Preset parameter
The Preset value is used to set the position of the valve
when the
MANUAL
feature is evoked in Control Mode.
Adjust the Gain parameter
Gain can be adjusted, and is associated with the selected
recipe.
Adjust the Lead parameter
Lead can be adjusted, and is associated with the selected
recipe.
Adjust the Set Point parameter
Set Point can be adjusted, and is associated with the
selected recipe.
Edit Control Recipes
There can be up to four recipes, each with its own Set
Point, Gain, and Lead parameters. By switching the
active recipe (in Control Mode), and selecting the
AUTO
feature (also in Control Mode), one of these four multi-
parameter recipes can be used to position the valve.
Table 43: Tuning Mode Functions
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