IsRequestComPortReset

评估请求的COM端口重置

此指令返回指定COM端口请求重置标志的值。

参数

输入

Port (WORD, INT, UINT)

根据PLC的类型指定通信端口：

COM端口，例如SYS_COM0_PORT
MCU/SCU，例如COM01中的16#xx01（xx = 插槽编号）

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
		fbResetComPort: ResetComPort;
		bResetComPort: BOOL:=FALSE;
		iPort: INT:=0;
		bComPortCannotBeUsed: BOOL:=FALSE;
		bIsResetRequested: 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_VARIN,,iPort,19,3,21,5,);
B(B_CONTACT,,bResetComPort,6,2,8,4,);
B(B_FB,ResetComPort!,fbResetComPort,21,1,29,5,,BbResetBPortAbIsDoneAbIsRequest);
L(1,3,6,3);
L(8,3,21,3);
L(1,0,1,5);
        END_NETWORK_BODY
    END_NET_WORK
    NET_WORK
        NETWORK_TYPE = NWTYPELD ;
        NETWORK_LABEL =  ;
        NETWORK_TITLE =  ;
        NETWORK_HEIGHT = 3 ;
        NETWORK_BODY
B(B_VARIN,,iPort,19,1,21,3,);
B(B_COIL,,bComPortCannotBeUsed,39,1,41,3,S);
B(B_F,IsRequestComPortReset!,,21,0,33,3,,DPortC);
L(1,0,1,3);
L(33,2,39,2);
        END_NETWORK_BODY
    END_NET_WORK
    NET_WORK
        NETWORK_TYPE = NWTYPELD ;
        NETWORK_LABEL =  ;
        NETWORK_TITLE =  ;
        NETWORK_HEIGHT = 3 ;
        NETWORK_BODY
B(B_VARIN,,iPort,19,1,21,3,);
B(B_COIL,,bComPortCannotBeUsed,39,1,41,3,E);
B(B_F,IsComPortResetDone!,,21,0,32,3,,DPortC);
L(32,2,39,2);
L(1,0,1,3);
        END_NETWORK_BODY
    END_NET_WORK
    NET_WORK
        NETWORK_TYPE = NWTYPELD ;
        NETWORK_LABEL =  ;
        NETWORK_TITLE =  ;
        NETWORK_HEIGHT = 6 ;
        NETWORK_BODY
B(B_COMMENT,,Valid numbers for iPort ø^      COM Ports on CPU unit                COM0~ COM1~ COM2~ ø^          COM Ports on SCU unit       16#xx01 ... 16#xx04 - xx = slotnumber 1...64,8,1,45,5,);
L(1,0,1,6);
        END_NETWORK_BODY
    END_NET_WORK
END_BODY

ST本体

If (bResetComPort) then
   fbResetComPort(bReset := bResetComPort,
   Port := iPort);
End_if;
If (IsRequestComPortReset(iPort)) then
    bComPortCannotBeUsed := TRUE;
Elsif (IsComPortResetDone(iPort)) then
    bComPortCannotBeUsed := FALSE;
End_if;