Справочник Пользователя для Mitsubishi Electronics FXCPU
18 Applied Instructions (Floating Point)
18.15 DESQR / Floating Point Square Root
477
FXCPU Structured Programming Manual
[Basic & Applied Instruction]
11
Appl
ied
ied
In
stru
cti
cti
ons
(D
ata O
per
at
io
n)
12
Ap
plied
Instru
ctio
ns
Instru
ctio
ns
(High S
peed
Process
ing)
13
App
lied Instr
lied Instr
ucti
ons
(Handy
Instruction)
14
Ap
pl
ied In
struct
struct
ions
(External FX I/O
D
evice)
15
Appl
ied
ied
Instru
cti
cti
ons
(External
Dev
ice
ice
(op
tional
dev
ice)
)
tional
dev
ice)
)
16
App
lie
lie
d Instr
uction
s
s
(E
xter
nal
nal
Devi
ce)
17
Ap
pl
ied Inst
ruct
io
io
ns
(Dat
a T
ransf
er 2)
a T
ransf
er 2)
18
Appl
ied
ied
In
stru
cti
cti
ons
(Float
ing P
oin
oin
t)
19
App
lie
lie
d Instr
uction
s
s
(D
at
a Oper
at
ion 2)
20
App
lied Inst
lied Inst
ructi
ons
ons
(Pos
itioning
Control)
18.15 DESQR / Floating Point Square Root
Outline
This instruction executes the square root operation of binary floating decimal point.
→ As for handling of floating decimal point, refer to FX Structured Programming Manual [Device &
Common].
1. Format and operation, execution form
2. Set data
3. Applicable devices
S: Refer to "Cautions".
Function and operation explanation
1. 32-bit operation (DESQR, DESQRP)
The data in the device specified by
is operated by square root (binary floating decimal point), and the
result is transferred to the device specified by
.
Related devices
→ As for the manner of using the zero flag, refer to the FX Structured Programming Manual [Device &
Common].
FX
3U(C)
FX
3G(C)
FX
3S
FX
2N(C)
FX
1N(C)
FX
1S
FX
U
/FX
2C
FX
0N
FX
0(S)
Instruction
name
Operation
Execution
form
Expression in each language
Structured ladder/FBD
ST
DESQR
32 bits
Continuous
DESQR(EN, s, d);
DESQRP
32 bits
Pulse
DESQRP(EN, s, d);
Variable
Description
Data type
Input
variable
variable
EN
Execution condition
Bit
Device for storing binary floating decimal point data for square root
operation
operation
FLOAT(Single
Precision)
Precision)
Output
variable
variable
ENO
Execution state
Bit
Device for storing binary floating decimal point data after square root
operation
operation
FLOAT(Single
Precision)
Precision)
Operand
type
Bit Devices
Word Devices
Others
System user
Digit designation
System
user
Special
unit
Index
Cons
tant
Real
Number
Character
String
Pointer
X Y M T C S D
.b KnX KnY KnM KnS T C D
R
U
\G
V Z Modifier K H
E
"
"
P
z
S1
S2
z
S3
z
S1
S2
z
Device
Name
Content
M8020
Zero
To be turned ON when the operation result is true 0.
DESQR
EN
ENO
d
s
DESQRP
EN
ENO
d
s
Command
input
input
DESQR
EN
ENO
d
s
Binary floating
decimal point
decimal point
[ +1, ]
d
s
Binary floating
decimal point
decimal point
s
[ +1, ]
d
→
Device for storing binary floating decimal
point data for square root operation
point data for square root operation
Device for storing binary floating decimal
point data after square root operation
point data after square root operation