Panasonic FP-E Programming Manual page 263

Eplanation of example
When X0 turns on or if (DT0, DT1)
(DT0, DT1) with the real number value of data registers (DT100, DT101), the external output relay Y30 goes
on. If (DT0, DT1) < (DT100, DT101) and if X0 is in the off state, the external output relay Y30 goes off.
Description
Compares the real number data specified by S1 and S1 +1 with the real number data specified by S2 and
S2+1 according to the comparison condition.
The ORF instruction results in parallel connection as the liaison contact when the comparison result is a
specified status (=, >, <, etc.).
The result of the comparison operation is as follows:
Comparison Condition
instruction instruction
(S1+1, S1)<
(S2+1, S2)
ORF= off
ORF on
< >
ORF off
>
ORF off
> =
ORF on
<
ORF on
< =
When processing 32-bit data, the higher 16-bit areas (S1+1, S2+1) are automatically determined once the
lower 16-bit areas (S1, S2) are specified.
S1+1 S1
Comparison
S2+1 S2
Precautions concerning usage
The OR comparison instructions ORF =, ORF <>, ORF >, ORF >=, ORF <, and ORF <= are programmed from
the bus line.
Multiple OR comparison instructions ORF =, ORF <>, ORF >, ORF >=, ORF<, and ORF <= can be used
consecutively.
Specifying the integer device with [S1] and [S2], the integer data is internally converted to real numbers
before operations continue.
When the constant K is specified in S1 and S2, the operations are the same as when a integer device is
specified.
Flag conditions
・Error flag (R9007):
・Error flag (R9008):
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(DT100, DT101) by comparing the real number value of data registers
(S1+1, S1) = (S1+1, S1) >
(S2+1, S2) (S2+1, S2)
on off
off on
off on
on on
off off
on off
The specified data area and the following data area are handled
together as single precision real number data.
Turns on and stays on when:
Turns on for an instant when:
− The area specified using the index modifier exceeds the limit.
− If data other than real number data are specified in (S1+1, S1) and (S2+1,
S2).
Basic Instructions
< > indicates
>= indicates
<= indicates
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