F219_DUNI

The function combines the two values at inputs s1 and s2 bit-wise with the value at input s3_Mask. The result of the instruction is returned at output d. The data-unite is calculated as follows:

Parameters

Input

s1 (DWORD, DINT, UDINT, DATE, TOD, DT)

32-bit equivalent constant or 32-bit area

s2 (DWORD, DINT, UDINT, DATE, TOD, DT)

32-bit equivalent constant or 32-bit area

s3_Mask (DWORD, DINT, UDINT, DATE, TOD, DT)

32-bit area that stores master data for combination or 32-bit equivalent constant

Output

d (DWORD, DINT, UDINT, DATE, TOD, DT)

32-bit area for storing result

Remarks

• Instead of using this F instruction, we recommend using the corresponding FP7 instruction: FP_COMBINE

• The variables s1,s2,s3_Mask and d have to be of the same data type.

• [d] = ([s1] AND [s3_Mask]) OR ([s2] AND (NOT[s3_Mask]))

  • When the value at input s3_Mask = 16#0, then the value at input s2 is returned at output d.

  • When the value at input s3_Mask = 16#FFFFFFFF, then the value at input s1 is returned at output d.

Error flags

sys_bIsEqual (turns to TRUE for one scan)

if the result calculated (output d) is 0.