Flowserve SoftTools Suite 7.0 - Manual (Page 15)

VLAUG001-00 ©Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611 15 of 21
The Position indicator bar on the left side of the panel represents the position of the closure
member in percent of full stroke. The indicator tracks the closure member position as the
valve is stroked. If a large deviation exists between Command In and Control command (the
actual command the positioner is using to position the valve), check to see if Custom
characterization is active. If not, two options are available to correct it.
• Wait a few minutes. The positioner has an integrator built into its control algorithm
that will slowly take out any deviation between the Command In and Control
commands.
• Tune the positioner. Refer to “Positioner Tuning” in the Configurator tool for
detailed information and instruction.
Selecting a Command Source
The positioner operates using either an analog or a digital command source. Analog
command source indicates that the Control command originates from a 4-20 mA current
source. Digital command source indicates that the Control command originates from a
computer or other source that is capable of sending the command via the HART

communication connection. Select the command source as follows:
1. Click the combo box labeled Source.
2. Select
Digital or Analog as desired. The program indicates the success of the
source change.
Entering a Digital Command
For fine adjustments to the digital positioner, use the Command In spin button edit control.
1. Use the spin buttons within the control labeled Command In to
increment/decrement the current value.
2. Highlight the value in the control box. Type in a new digital command percentage
and press ENTER to transfer the new value to the positioner.
Selecting a Step Size
Set the step size as follows:
1. Click the combo box labeled Step Size.
2. Select the step size desired for the particular application. Sizes range from 10
through 1 to 0.1, as a percent of stroke. Press ENTER to transfer the new value
to the positioner.
The program uses the newly selected step size for all subsequent adjustments made to the
digital command percentage.
Viewing Individual Variables
To view individual variables, select the View Variables tab.
1. Choose a variable to view by alternately clicking on each button edit control
beneath the Variable # label.