User Manual

XL7 User Manual
13.5 Ladder Based Screen Navigation
Ladder logic can use several techniques to control screen navigation. Coils can be tied to %D registers to
make them screen coils. These coils have two modes, switch and alarm. If the ladder program energizes
an alarm display coil, the screen associated with this coil is displayed and overrides the normal user
screens. This is designed to show alarm conditions or to display other ladder-detected events. When
the text coil is de-energized, the previous screen that was being viewed before the alarm is returned.
The switch display coil switches to the associated screen when it is energized. Once it is de-energized
the screen remains until it is switched by the user or ladder
Figure 13.4 – Force and Switch Coils in Ladder Programming
There is also a system register that can be used to for control based screen navigation. %SR1 can be
read to determine the current screen or written to change the current screen.
Refer to the on-line help in Cscape for more information on control-based screen navigation.
13.6 Beeper Acknowledgement
The XL7 contains an internal beeper that provides an audible acknowledgment when an operator
touches a graphic object that accepts touch input. When the graphic object is enabled, a short 5ms tone
is emitted. When the graphic object is disabled, a longer 100ms tone is emitted to enounce that
graphical object is not currently accepting the touch input.
If beep acknowledgement is not desired, the beeper function can be disabled from the system menu.
13.7 Touch (Slip) Sensitivity
Touch slip sensitivity is preset to meet most applications; however, adjustment is available to reduce the
sensitivity for touch release. That is, once a graphical object (button) is touched and held by a finger,
the default touch slip sensitivity allows for a slight slip of the finger on the graphical object before the
XL7 assumes touch has been released (equates to approximately a quarter inch of movement with a
stylus).
In some applications (such as jog buttons) where the operator is pushing a button for a period of time,
the amount of slip while holding a button pressed may exceed the default sensitivity. To increase the
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