Mitsubishi MELSEC F FX-40DU-E Handy Manual page 49

4.
USER SCREEN MODE
4.5
Changing Displayed Screens
Sections 4.1 through 4.4 have dealt with display formats for screens i n general. The following sections
deal with the procedure for selecting and displaying individual screens that have already been created
(maximum of 256).
4.5.1 Guide t o changing screens
The display of any screen i s specified by a [CHANGE SCREEN] object. This object sets both the
conditions under which a screen is changed and the screen that will be displayed after the change i s
executed. A [CHANGE SCREEN] object must be executed t o change the displayed screens.
This screen changing mechanism makes it possible to select and display one of many screens on the
basis of many conditions.
(1)
The [CHANGE SCREEN] object
The following is a brief guide to the [CHANGE SCREEN] change object; a more detailed
explanation with example screen changes is presented from page 47 onward. Setting a
[CHANGE SCREEN] object involves setting the [change conditions], [screen specification] and
[screen storage].
Change conditions:
The conditions under which the screen is displayed have to be set. It is possible to specify two types
of condition; input from FX-40DU-E operation keys and programmable controller device status.
[KEY1
: Operation key [O] to [9], [SHIFT]
+
[O] to [9], [ V
1,
[ A 1, [SHIFT]
(condition at FX-
+ [ V l , [SHIFT] + [ A ]
4ODU-E side)
External input 0 to 7 (10 to 17)
None
N o condition at FX-40DU-E side
[DEVICE] :
Programmable controller bit devices X, Y, M, S, T, C
(Condition at the
(normally-open contact or normally-closed contact)
programmable
controller side)
None
N o condition at the programmable controller side
*
When both the [KEY] and [DEVICE] conditions are met, the screen changes.
*
If both the [KEY] and [DEVICE] conditions are none, the [CHANGE SCREEN] object will
execute immediately.
DEST:
When the conditions for the change have been established, the destination screen (Screen to
be displayed next) is set.
One of the following three methods for specifying this screen should be selected; (1) direct
specification of the screen number ([NUMBER]), (2) specification from the programmable
controller ([PLC]), (3) specification of the screen in the internal memory ([MEMORY]).
[NUMBER] :
The user specifies the screen number of an individual user-created screen.
(For screen examples see page 47).
[PLC] :
The screen corresponding to the screen number specified by the programmable
controller is displayed. The screen number is specified in a control device
data register; set using the screen creation software. It i s possible t o display
up to three overlaid screens i n accordance with the ONIOFF status of control
devices (auxiliary relays). (Display examples on page 48)
(Screen overlay function)
[MEMORY] : The screen stored in the internal memory of the FX-4ODU-E is displayed.
(Display examples on page 54).
-
SAVED:
Set [YES] or [NO] to determine whether the screen number of the displayed screen is saved.
If [YES] is set the screen number is stored in the internal memory and the display changes to
the next screen. The screen number stored by this function becomes the display destination
for [MEMORY] specified screen changes.