Omron SYSMAC CJ - REFERENCE MANUAL 08-2008 - 16-Bit to Floating: Flt(452)

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Floating-point Math Instructions Section 3-15
Description 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.
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.
Flags
Precautions 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.
3-15-3 16-BIT TO FLOATING: FLT(452)
Purpose Converts a 16-bit signed binary value to 32-bit floating-point data and places
the result in the specified result words.
Ladder Symbol
Indirect DM/EM
addresses in BCD
*D00000 to *D32767
*E00000 to *E32767
*En_00000 to *En_32767
(n = 0 to C)
Constants #00000000 to #FFFFFFFF
(binary)
---
Data Registers ---
Index Registers ---
Indirect addressing
using Index Registers
,IR0 to ,IR15
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –()IR15
Area S R
S+1 S
R+1 R
Floating-point data (32 bits)
Signed binary data (32 bits)
Name Label Operation
Error Flag ER 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.
Equals Flag = ON if the result is 0000 0000.
OFF in all other cases.
Negative Flag N ON if bit 15 of R+1 is ON after execution.
OFF in all other cases.
FLT(452)
S
R
S: Source word
R: First result word