ExpansionUnitNumberToIOWordOffset_FP0

Function to calculate the I/O offset of an analog expansion unit connected directly to the CPU (without adapter).

I/O starting addresses vary, depending on the installation position of the expansion unit. The function block calculates the I/O word offset based on the unit position relative to the CPU.

Parameters

Input

iExpansionUnitNumber (INT)

Set the position of the FP0/FP0R expansion unit relative to the CPU.

Values: 1 to 3

Output

iIOWordOffset (INT): Returns the offset of the I/O word (WX/WY2, 4, or 6)

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
	Inst_FP0R_A21: Unit_AnalogInOut_FP0R_A21;
	iAnalogOut0: INT:=0;
	bIO_Config_done: BOOL:=FALSE;
	iAnalogIn0: INT:=0;
	iAnalogIn1: INT:=0;
END_VAR

POU body

The function converts the position number (1 to 3) of the FP0/FP0R expansion unit, where 0 is the CPU, to the corresponding I/O word offset 2, 4, or 6.

LD body

BODY
    WORKSPACE
        NETWORK_LIST_TYPE := NWTYPELD ;
    END_WORKSPACE
    NET_WORK
        NETWORK_TYPE := NWTYPELD ;
        NETWORK_LABEL :=  ;
        NETWORK_TITLE :=  ;
        NETWORK_HEIGHT := 8 ;
        NETWORK_BODY
B(B_VARIN,,1,9,2,11,4,);
B(B_F,ExpansionUnitNumberToIOWordOffset_FP0!,,11,1,31,4,,?DiExpansionUnitNumber?C);
B(B_FB,Unit_AnalogInOut_FP0R_A21!,Inst_FP0R_A21,35,1,50,8,,?BiIOWordOffset?BiOutChannel0?BiOutChannel0_Config?BiInChannel0_Config?BiInChannel1_Config?CbConfigIsDone?CiInChannel0?CiInChannel1);
B(B_VAROUT,,bIO_Config_done,50,2,52,4,);
B(B_VARIN,,iAnalogOut0,33,3,35,5,);
B(B_VAROUT,,iAnalogIn0,50,3,52,5,);
B(B_VARIN,,0,33,4,35,6,);
B(B_VAROUT,,iAnalogIn1,50,4,52,6,);
B(B_VARIN,,0,33,5,35,7,);
B(B_VARIN,,0,33,6,35,8,);
L(1,0,1,8);
L(31,3,35,3);
        END_NETWORK_BODY
    END_NET_WORK
END_BODY

ST body

Inst_FP0R_A21(iIOWordOffset := ExpansionUnitNumberToIOWordOffset_FP0(1),
	iOutChannel0 := iAnalogOut0,
	iOutChannel0_Config := 3,
	iInChannel0_Config := 0,
	iInChannel1_Config := 0,
	bConfigIsDone => bIO_Config_done,
	iInChannel0 => iAnalogIn0,
	iInChannel1 => iAnalogIn1);