IsRequestComPortReset

Evaluate the COM port reset requested

This instruction returns the value of the reset requested flag of a specified COM port.

Parameters

Input

Port (WORD, INT, UINT)

Specifies the communication ports depending on the PLC type:

COM port e.g. SYS_COM0_PORT
MCU/SCU e.g. 16#xx01 (xx = slot number) in COM01

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
		fbResetComPort: ResetComPort;
		bResetComPort: BOOL:=FALSE;
		iPort: INT:=0;
		bComPortCannotBeUsed: BOOL:=FALSE;
		bIsResetRequested: 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_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 body

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