Mitsubishi Electronics FX3G User Manual
335
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
Series
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
C3
C30
-FN
C3
9
R
ota
tion and
Shi
ft
ft
12
FN
C40-FN
C40-FN
C49
D
ata O
perati
perati
on
13
FNC
50-FNC
59
High-Speed
Proc
essing
14
FM
C60-FN
C60-FN
C69
H
andy
In
struction
15
FN
C70-FN
C70-FN
C79
E
xternal
F
X
I/O
De
vice
16
FNC
80-FNC
89
External
FX
Dev
ice
ice
17
FNC1
00-
FNC10
00-
FNC10
9
Dat
a
a
Transfer 2
18
FNC1
10-
FNC139
FNC139
Fl
oati
ng Poi
nt
19
FNC14
0-F
N
C
149
Da
ta
Operation 2
20
FNC1
50-
FNC159
FNC159
Pos
itioning
itioning
Control
12.9
FNC 48 – SQR / Square Root
Outline
This instruction obtains the square root.
The ESQR (FNC127) instruction obtains the square root in floating point operation.
The 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 ignored.
When the calculated value is ignored, M8021 (borrow flag) turns ON.
2) When the calculated value is true "0", M8020 (zero flag) turns ON.
Program example
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
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
DSQR
DSQRP
DSQRP
Mnemonic
Operation Condition
P
FNC 48
SQR
D
16-bit Instruction
5 steps SQR
SQRP
Mnemonic
Operation Condition
Continuous
Operation
Pulse (Single)
Pulse (Single)
Operation
32-bit Instruction
9 steps
Continuous
Operation
Pulse (Single)
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
X000
S
D
D 10
→ D 12
FNC 48
SQR
D 10
D 12
100
→ 10
=
The square root of D10 is stored to D12.
The value of D10 is "100".