Omron CP - PROGRAMMING MANUAL 05-2007 Programming Manual page 514

Floating-point Math Instructions
Description
Flags
Precautions
3-14-3 16-BIT TO FLOATING: FLT(452)
Purpose
Ladder Symbol
Variations
Applicable Program Areas
Operand Specifications
FIXL(451) converts the integer portion of the 32-bit floating-point number in
S+1 and S (IEEE754-format) to 32-bit signed binary data and places the
result in R+1 and R.
S+1 S
R+1 R
Only the integer portion of the floating-point data is converted, and the fraction
portion is truncated. (The integer portion of the floating-point data must be
within the range of –2,147,483,648 to 2,147,483,647.)
Example conversions:
A floating-point value of 2,147,483,640.5 is converted to 2,147,483,640.
A floating-point value of –214,748,340.5 is converted to –214,748,340.
Name Label
Error Flag ER
Equals Flag =
Negative Flag N
The content of S+1 and S must be floating-point data and the integer portion
must be in the range of –2,147,483,648 to 2,147,483,647.
Converts a 16-bit signed binary value to 32-bit floating-point data and places
the result in the specified result words.
FLT(452)
S
R
Variations Executed Each Cycle for ON Condition
Executed Once for Upward Differentiation
Executed Once for Downward Differentiation Not supported.
Immediate Refreshing Specification
Block program areas
OK OK
Area
CIO Area
Work Area
Floating-point data (32 bits)
Signed binary data (32 bits)
Operation
ON if the data in S+1 and S is not a number (NaN).
ON if the integer portion of S+1 and S is not within the
range of –2,147,483,648 to 2,147,483,647.
OFF in all other cases.
ON if the result is 0000 0000.
OFF in all other cases.
ON if bit 15 of R+1 is ON after execution.
OFF in all other cases.
S: Source word
R: First result word
Step program areas Subroutines
OK
S
CIO 0 to CIO 6143
W0 to W511
Section 3-14
FLT(452)
@FLT(452)
Not supported.
Interrupt tasks
OK
R
CIO 0 to CIO 6142
W0 to W510
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