Panasonic FP Series Programming Manual page 599

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Bit-shift instructions

The function rotates the value at output d via the carry flag to the right. The number of bits at output

d to be rotated to the right is specified by the value assigned at input n. This shift can lie between 0

and 255 (only the lower value byte of n is effective).

The bit value at bit position n - 1 is stored in the carry flag. The function shifts out n bits from bit 0

to the right, and then along with the inverted carry flag first, continues via bit 31 into the higher bit

positions. Position 32 - n now has the inverted value of the carry flag.

When input n = 0, no rotation occurs and the carry flag remains unchanged.

When at input n > 32, the same result is achieved as with a number n < 32: e.g. n = 33 produces

the same result as when n = 0; n = 34 the same as n = 1.

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 F127_DRCR (see page 1321)

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 right rotate with carry flag data

32-bit data area

number of bits to be rotated (range: 0 to 255)

for an instant

 the bit at position n - 1 has the value 1.

dec. or hex.