GT_ChangeBacklightBrightness

Changes the backlight brightness of a GT panel

This instruction changes the backlight brightness of the GT Panel using the variables described in the table for data types.

Parameters

Input

iBrightness (INT): Brightness value 0–15

Input/output

dutGTBitArea (GT_CommunicationBitArea_DUT): GT basic communication bit area

Output

bError (BOOL): Turns on if the brightness value is out of range

Example

POU header

All input and output variables used for programming this function have been declared in the POU header. The same POU header is used for all programming languages.

_VAR
	VAR 
		bActivateNewPage: BOOL:=FALSE;
		wNewPageNo: WORD:=0;
		g_bStartPage: BOOL:=FALSE;
		fbChangeScreen: GT_CtrlActivateScreen;
		bHoldPage: BOOL:=FALSE;
		iBrightness: INT:=0;
		bErrorBacklightBrightness: BOOL:=FALSE;
		bChangeBacklightBrightness: BOOL:=FALSE;
	END_VAR

LD body

BODY
    WORKSPACE
        NETWORK_LIST_TYPE := NWTYPELD ;
        ACTIVE_NETWORK := 0 ;
    END_WORKSPACE
    NET_WORK
        NETWORK_TYPE := NWTYPELD ;
        NETWORK_LABEL :=  ;
        NETWORK_TITLE :=  ;
        NETWORK_HEIGHT := 5 ;
        NETWORK_BODY
B(B_CONTACT,,bChangeBacklightBrightness,9,1,11,3,);
B(B_VARIN,,iBrightness,13,2,15,4,);
B(B_VARIN,,g_GT_BitArea,13,3,15,5,);
B(B_VAROUT,,bErrorBacklightBrightness,30,2,32,4,);
B(B_F,GT_ChangeBacklightBrightness!,,15,0,30,5,,?DEN?DiBrightness?DdutGTBitArea?AdutGTBitArea?AENO?AbError);
L(1,2,9,2);
L(11,2,15,2);
L(1,0,1,5);
        END_NETWORK_BODY
    END_NET_WORK
END_BODY

ST body

fb_GT_ChangeBacklightBrightness((* EN := TRUE, *) 
                    iBrightness := iBrightness,
                    dutGTBitArea := g_GT_BitArea,
                    bError => bErrorBacklightBrightness
                     (* , ENO => ?BOOL? *));