Panasonic FP Series Programming Manual page 611

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Comparison instructions

Compares the 32-bit equivalent constant or 32-bit data specified by s1_In with the data band

specified by s2_Min and s3_Max if the trigger EN is in the ON-state. This instruction checks that

s1_In is in the data band between s2_Min (lower limit) and s3_Max (higher limit), larger than

s3_Max, or smaller than s2_Min. The compare operation considers +/- sign. Since the BCD data is

also treated as 32-bit data with sign, we recommend using BCD data within the range of 0 to

79999999 to avoid confusion. The compare operation result is stored in special internal relays

R9009, R900A to R900C.

Comparison between

s1, s2 and s3

s1_In < s2_Min

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 F63_DWIN (see page 1326)

The variables s1, s2 and s3 have to be of the same data type.

In this example the function has been programmed in ladder diagram (LD) and structured text

(ST).The same POU header is used for all programming languages.

32-bit data band compare

R900A (>flag)

32-bit area or 32-bit equivalent constant to be compared

lower limit, 32-bit area or 32-bit equivalent constant

upper limit, 32-bit area or 32-bit equivalent constant

R900C (<flag)

dec. or hex.