Advanced Function Instruction
7-139
FUN 212 P
FNEG
CHANGE SIGN OF THE FLOATING POINT NUMBER
FUN 212 P
FNEG
D : Register to be changed sign
D may combine with V, Z, P0~P9 to serve indirect
address application
HR ROR DR K XR
Range
Operand
R0
∣
R383
9
R5000
∣
R8071
D0
∣
D4095
Integer
16 Bit
number
V、Z
P0～P9
D ○ ○* ○ ○
Description
z The format of floating point number of Fatek-PLC follows the IEEE-754 standard. For detail explanation of the
format please refer to 5.3 (Numbering System) page 5-9.
z When operation control "EN" = 1 or "EN↑" ( P instruction) from 0 to 1, the sign of the floating point number
register specified by D will be toogled.
EN
X0
212P.
FNEG
R0
z The instruction at left negates the value of the
DR0 register, and stores it back to DR0.
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