GT_ChangeBacklightBrightness

更改GT面板的背光亮度

此指令使用数据类型表中描述的变量，来更改GT面板的背光亮度。

参数

输入

iBrightness (INT): 亮度值0-15

输入/输出

dutGTBitArea (GT_CommunicationBitArea_DUT): GT基本通信位区域

输出

bError (BOOL): 亮度值超出范围时打开

示例

POU头

所有用于编程此函数的输入和输出变量已在POU头中声明。所有编程语言使用相同的POU头。

_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本体

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本体

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