Panasonic FP Series Programming Manual page 565

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Bit-shift instructions

The function rotates the value at output d to the left. The number of bits at output d to be shifted to

the left 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). Bits cleared because of the shift become 0. When input n = 0, no

shift takes place. A shifting distance larger than 32 does not make sense, since when n = 32 the

value at output d is already filled with zeros. The bit at position 31 - n (the last bit shifted out to the

left) is simultaneously stored in special internal relay R9009 (carry flag) so that it can be evaluated

accordingly. When n = 0 the content of the carry flag does not change.

The data in the nth

bit is transferred to

R9009 (carry flag).

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 F103_DSHL (see page 1320)

Left shift of 32-bit data in bit units

[n bits] starting from bit position 0

are filled with 0s.

number of bits to be shifted (range: 16#0 to 16#FF)

32-bit area to be shifted to the left

for an instant

 the bit at position 31 - n has the value 1.

dec. or hex.