Horner APG XLt OCS - Manual (Page 64)

CH.12 MAN0878-04-EN
August 12, 2009 Page 64 of 100 ECN # 979
12.2
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 12-3 – 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.
12.3
Using Editable Screen Objects
When a screen contains editable objects, one of the objects will be selected by default. Selected objects
will be outlined with a dotted line. The arrow keys can be used to navigate the editable objects and allow
selection of an object to edit. When the object to be edited is selected press the Enter button. This
enters the objects editing mode.
The most common editable object is the numeric object.
XLe Specific:
When in edit mode, a cursor appears on one digit of the editable field. Use the direction keys Õ and
Ö to move the cursor to the desired position. Use the × and Ø keys to increment or decrement the
digit or enter the number/data with the alphanumeric keys.