Specifications

Graphic Operation Terminal GOT-F900 Changeover of Display Screen (GT Designer) 21

21-3

21.3 Changeover of base screen (changeover from PLC)

The number of a screen to be displayed can be specified using the current value of a word

device (D, T or C) in the PLC.

The word device can be set in "Switching Screen" in "Common" in the screen creation

software. By performing this setting only once, a screen to be displayed next can be specified

from the PLC for any screen as the setting is effective to all screens.

21.3.1 Outline of changeover of base screen

• Base screen changeover settings can be performed using the screen creation software.

Setting for screen changeover

Base screen : Specify the screen number to be displayed by the word device, D, C

and T. (initial value = D0)

Overlap window 1: Screen overlaying the base screen (initial value = none)

Overlap window 2: Screen overlaying the overlap window 1 (For screen overlay, refer to

Section 6.5.)

Example: When the word device D0 is used to change over the base screen

• When the display screen is changed over using a touch key as described in the next

section, a screen number specified by the touch key is stored as the current value of the

word device specified for "changeover of the base screen".

However, when a system screen (No. 1001 to No. 1030) is displayed using a touch key, the

screen number is not stored. For changeover to a system screen, refer to Section 20.5.

Important point

Initialization of a word device used to specify the base screen

If the current value of a word device used to specify the base screen is "0", the error message

"DISPLAY SCREEN IS NOT AVAILABLE." is displayed in the screen mode because the user

screens start from the screen No. 1. In the screen changeover setting in the GT Designer, it is

recommended to initialize a word device used to specify the base screen when the power of

the GOT is turned ON unless otherwise required.

This setting can be performed also on the system screen of the GOT. (Refer to 5.2.13.)

Screen No. 1 is displa

ed.

D0: Current val ue

1 10 20

Screen No. 10 is displa

ed. Screen No. 20 is displa

ed.