FP_DIRECT_INPUT

Direct input refresh

This FP instruction reads the current value of the direct input memory specified by Slot and Offset independently from any IO refresh.

Parameters

Input

Slot (WORD, INT, UINT): Slot number
Offset (WORD, INT, UINT): Offset

Output

Value (BOOL, WORD, DWORD): Value of the direct input

Error flags

sys_bIsOperationErrorHold (turns to TRUE and remains TRUE)

if the area specified using the index modifier exceeds the limit.

sys_bIsOperationErrorNonHold (turns to TRUE for one scan)

if the area specified using the index modifier exceeds the limit.

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
		bTestBool: BOOL:=FALSE;
		bTestWord: BOOL:=FALSE;
		bTestDWord: BOOL:=FALSE;
		iOffset27: INT:=27;
		iSlot1: INT:=1;
		iIndex3: INT:=3;
		arrValuesBool: ARRAY [0..15] of BOOL:=[3(FALSE),TRUE,12(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 := 6 ;
        NETWORK_BODY
B(B_VARIN,,iSlot1,23,2,25,4,);
B(B_VARIN,,iOffset27,23,3,25,5,);
B(B_CONTACT,,bTestBool,5,1,7,3,);
B(B_CONTACT,,bTestWord,11,1,13,3,N);
B(B_CONTACT,,bTestDWord,17,1,19,3,N);
B(B_F,E_FP_DIRECT_INPUT!,,25,0,35,5,,?DEN?DSlot?DOffset?AENO?CValue);
B(B_VAROUT,,arrValuesBool[iIndex3],35,2,37,4,);
L(1,2,5,2);
L(7,2,11,2);
L(13,2,17,2);
L(19,2,25,2);
L(1,0,1,6);
        END_NETWORK_BODY
    END_NET_WORK
END_BODY

ST body

IF (bTestBool AND NOT bTestWord AND NOT bTestDWord) then
    arrValuesBool[iIndex3]:=FP_DIRECT_INPUT(iSlot1, iOffset27);
END_IF;