Panasonic FP Series Programming Manual page 535

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Bitwise Boolean instructions

The function performs a bit-wise exclusive NOR operation on two 32-bit data items at inputs s1 and

s2. The result of the function is returned at output d.

Using this instruction you can check how many bits in the two 32-bit data items are the same. At

each position in which the bits at inputs s1 and s2 match, a 1 is produced in the result.

This instruction also exists as a P instruction (for FP2/2SH, FP3/5, FP10/10SH PLC types), which

is only executed at the rising edge of the EN trigger. Select [Insert P instruction] from the

"Instructions" pane if you require a P instruction. To facilitate reuse, the instruction then appears

under "Recently used" in the pop-up menu. Press <Ctrl>+<Shift>+<v> within the programming

area to open the list of recently used elements.

Availability of F218_DXNR (see page 1323)

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

In this example, the same POU header is used for all programming languages. For an example

using IL (instruction list), please refer to the online help.

32-bit data XNR

32-bit equivalent constant or 32-bit area

32-bit area for storing XNR operation result

for an instant

 the result calculated (output d) is 0.

dec. or hex.