GT10/GT30

7.1 Switching Screens

 

 

7.1Switching Screens

There are three ways to switch screens registered in the GT main unit.

7.1.1Switching the Screen from the PLC

GT main unit screens can be switched from the PLC ladder program, by writing the number of the screen to be displayed in hexadecimal format to the initial word of the word device in the basic communication area.

At the same time that the screen is switched, the GT main unit writes the number of the screen to which the display was switched in the first to third words of the basic communication area, in hexadecimal format.

How communication is carried out between the GT main unit and the PLC (screen switching)

 

 

 

Basic communication area / word device

 

 

 

 

 

 

Ongoing

First word (specifies screen no. from PLC)

 

 

 

 

 

 

 

Second word (usage prohibited area)

 

 

communication

 

 

 

Third word (no. of screen currently displayed)

 

GT main unit

 

Internal PLC device

PLC

How screens are switched

 

 

 

 

Basic communication area / word device

 

Screen No. 1

 

 

First word, HEX 2

 

 

When Screen No. 2

Second word (usage prohibited area)

 

 

 

Third word, HEX 1

 

 

 

is specified by the

 

GT main unit

PLC

 

PLC

the screen switches to No. 2

and the PLC is notified that the screen has been switched.

Screen No. 2

GT main unit

Basic communication area / word device

First word, HEX 2

Second word (usage prohibited area)

Third word, HEX 2

PLC

Example of ladder programs

Following are basic screen display programs in FPWIN Pro and FPWIN GR.

When the PLC directs the display unit to switch screens, indicate as shown in the programs both:

the screen to be displayed using a hexadecimal number

the destination of the screen as defined in the basic communication area

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