Section 14 • Slide Calibration Overview; Capacity Slide Valve Potentiometer - Emerson Vilter Vission 20/20 Operation And Service Manual

Section 14 • Slide Calibration
Overview
The Slide Calibration screen is used for calibration of the
slide actuators and to establish Vission 20/20 control
parameters. It is important that the operator uses cau-
tion while operating in this screen, see Figure 14-1. The
normal safety checks that prevent the slide from collid-
ing with the mechanical stops are overridden. When the
calibration process is completed and the operator exits
the screen, both actuators will return the slides back to
their minimum positions.

Capacity Slide Valve Potentiometer

This section provides critical information and control pa-
rameters related to the capacity slide actuator. The "%
cap" display shows the actual value in percent of the ca-
pacity slide without any conditioning that might be ap-
plied to the other capacity position displays. In addition,
Vission 20/20 • Operation and Service Manual • Emerson • 35391SC 2.7
Figure 14-1. Slide Calibration Screen
this section displays the value of the actuator's signal in
millivolts in the "input Value" display box.
"-" Button:
• When the operator presses and holds this button,
the output associated with capacity slide decrease
is energized. If the actuator does not turn in the cor-
rect direction when this button is pressed, then the
operator will have to alter how the actuator is wired
to the panel.
"+" Button:
• When the operator presses and holds this button,
the output associated with capacity slide increase is
energized. If the actuator does not turn in the cor-
rect direction when this button is pressed, then the
operator will have to alter how the actuator is wired
to the panel.
Software limit setpoint:
• The Vission 20/20 uses the "Min Limit" and "Max
Limit" setpoints to define an area within the
14 – 1