311
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
12 Data Operation – FNC 40 to FNC 49
12.9 FNC 48 – SQR / Square Root
11
FN
C30-
FN
C39
R
o
ta
tion and
Sh
ift
12
FNC
4
0
-FNC49
D
a
ta
Op
e
ra
tio
n
13
FNC5
0
-FNC5
9
H
igh Speed
Pr
ocessi
ng
14
FM
C6
0
-F
NC6
9
H
and
y
In
st
ru
cti
o
n
15
FNC7
0
-FNC7
9
Ex
te
rn
a
l F
X
I
/O
D
evi
ce
16
FNC8
0
-FNC8
9
Ext
e
rnal
FX
D
evi
ce
17
F
N
C1
00
-F
NC
10
9
Da
ta
Tr
ansf
e
r 2
18
FN
C
110-FN
C
13
9
Fl
oat
ing P
o
in
t
19
FN
C
140-FN
C
149
Da
ta
O
per
at
io
n
2
20
FN
C
15
0-F
N
C
159
P
o
si
tioni
ng
C
ont
ro
l
12.9
FNC 48 – SQR / Square Root
Outline
This instruction obtains the square root.
As a related instruction, ESQR (FNC127) instruction obtains the square root in floating point operation.
→
For ESQR (FNC127) instruction, refer to Section 18.15.
1. Instruction format
2. Set data
: K0 to K32767 in 16-bit operation, K0 to K2,147,483,647 in 32-bit operation
3. Applicable devices
Explanation of function and operation
1. 16-bit operation (SQR and SQRP)
The square root of the data stored in
is calculated, and stored to
.
2. 32-bit operation (DSQR and DSQRP)
The square root of the data stored in [
+1,
] is calculated, and stored to [
+1,
].
Caution
1. Operation result
1) The obtained square root is an integer because the decimal point is rounded down.
When the calculated value is rounded down, M8021 (borrow flag) turns ON.
2) When the calculated value is true "0", M8020 (zero flag) turns ON.
Operand type
Description
Data type
Word device number storing data whose square root is obtained
16- or 32-bit binary
Data register number storing the square root operation result
16- or 32-bit binary
Oper-
and
Type
Bit Devices
Word Devices
Others
System User
Digit Specification
System User
Special
Unit
Index
Con-
stant
Real
Number
Charac-
ter String
Pointer
X Y M T C S D
.b KnX KnY KnM KnS
T
C
D
R U
\G
V
Z Modify K
H
E
"
"
P
3 3
3
3
3 3
3 3
3
3
DSQR
DSQRP
Mnemonic
Operation Condition
P
FNC 48
SQR
D
16-bit Instruction
5 steps
SQR
SQRP
Mnemonic
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
32-bit Instruction
9 steps
Continuous
Operation
Pulse (Single)
Operation
S
1
S
D
D
1
S
S
1
S
D
D
1
S
D
1
D
Command
input
→
FNC 48
SQR
S
D
S
D
D
1
S
D
1
S
D
1
D
D
1
D
Command
input
+ 1,
FNC 48
DSQR
S
D
S
D
S
→
+ 1, D
Содержание FX3U Series
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