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Advanced Function Instruction
7 -1 2 9
FUN 203
P
FSUB
FLOATING POINT NUMBER SUBTRACTION
FUN 203
P
FSUB
Sa: Minuend
Sb: Subtrahend
D : Destination register to store the results
of the subtraction
Sa, Sb, D may combine with V, Z, P0~P9 to
serve indirect addressing
HR
ROR
DR
K
XR
Range
Operand
R0
∣
R383
9
R5000
∣
R8071
D0
∣
D4095
Floating
point
number
V
、
Z
P0
~
P9
Sa
○
○
○
○
○
Sb
○
○
○
○
○
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
Performs the subtraction of the data specified at Sa and Sb and writes the results to a specified register D
when the subtract control input "EN" =1 or "EN
↑
" (
P
instruction) from 0 to 1. If the result exceed the range
that the floating point number can be expressed(
±
3.4* 10
3 8
)
then the error flag FO0 will be set to 1 and
the D register will be intact.
X0
Sa :
R0
Sb :
D :
ERR
203P.FSUB
EN
R4
R10