529
SQRD, SQRDP
1
2
3
4
4
6
7
8
7.12
Special function
instructions
7.12.2
0
SQR
D
, SQR
D
P
: Data of which the square root is obtained or head number of the devices where the data is stored (real number)
: Head number of the devices where the operation result will be stored (real number)
F
unct
i
on
(1) Returns the square root of the value designated at , and stores the operation result in the device number designated at
.
(2) Only positive values can be designated by . (Operation cannot be performed on negative numbers.)
(3) When the operation results in -0 or an underflow, the result is processed as 0.
Operat
i
on
E
rror
(1) In any of the following cases, an operation error occurs, the error flag (SM0) turns ON, and an error code is stored into
SD0.
Program
E
xamp
l
e
(1) The following program seeks the square root of the value set by the 4 BCD digits from X20 to X2F, and stores the result
as a 64-bit floating decimal point type real number at D0 to D3.
[Ladder Mode]
7.12.20 SQRD, SQRDP
Square root operation for floating-point data
(Double precision)
7.12.20
SQRD, SQRDP
Setting
Data
Internal Devices
R, ZR
J \
U \G
Zn
Constants
E
Other
Bit
Word
Bit
Word
––
––
––
––
––
––
––
Error
code
Error details
Q00J/
Q00/
Q01
QnH
QnPH QnPRH
QnU
LCPU
4100
The value specified in is negative.
––
––
––
––
4140
The specified device value is not within the following range:
0, 2
-1022
| Specified device value | < 2
1024
The specified device value is -0.
––
––
––
––
4141
The operation result exceeds the following range (when an overflow
occurs):
2
1024
| Operation result |
––
––
––
––
Universal
LCPU
Bas
i
c
Hi
gh
performance
Process
Redundant
Command
Command
S
Q
RDP
SQRD
SQRDP
S
Q
RD
S
D
S
D
S
D
S
D
S
D
(
)
6
4-
b
i
t
f
l
oat
i
ng
-
po
i
nt
rea
l
number
6
4-
b
i
t
f
l
oat
i
ng
-
po
i
nt
rea
l
number
+
3
S
+
2
S
S
+
1
S
+
3
D
+
2
D
D
+
1
D
S
S
I
nputs
data
used
for
square
root
operat
i
on
(
)
.
Con
v
erts
the
i
nput
data
i
nto
a
6
4-
b
i
t
f
l
oat
i
ng
-
po
i
nt
rea
l
number
(
)
.
E
xecutes
square
root
operat
i
on
(
)
.
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