Panasonic FP Series Programming Manual page 595

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Bit-shift instructions

The function rotates the value at output d 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). Right rotate means that the bits shifted out of bit position 0

(LSB) are shifted via bit position 31 (MSB) into the value at output d. When input n = 0, no rotation

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

32 produces the same result as when n = 0; n = 33 the same as n = 1. The bit at position n - 1 (the

last bit shifted out to the right) is simultaneously stored in special internal relay R9009 (carry flag)

so that it can be evaluated accordingly.

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 F125_DROR (see page 1320)

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.

All input and output variables used for programming this function have been declared in the POU

32-bit data right rotate

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

for an instant

 the bit at position n - 1 of d has the value

dec. or hex.