517
ATAN, ATANP
1
2
3
4
4
6
7
8
7.12
Special function
instructions
7.12.1
1
ATAN, ATA
N
P
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.
*2:
There are CPU modules that will not result in an operation error if -0 is specified.
For details, refer to Page 88, Section 3.2.4.
Program
E
xamp
l
e
(1) The following program seeks the inverse tangent of the 32-bit floating decimal point real number at D0 and D1, and
outputs the angle to the 4 BCD digits at Y40 to Y4F.
[Ladder Mode]
[List Mode]
[Operations involved when D0 and D1 value is 1]
Error
code
Error details
Q00J/
Q00/
Q01
QnH
QnPH QnPRH
QnU
LCPU
4100
The specified device value is -0.
*2
––
––
––
4140
The specified device value is not within the following range:
0, 2
-126
| Specified device value | < 2
128
The specified device value is -0, unnormalized number, nonnumeric,
and ±
.
––
––
––
––
4141
The operation result exceeds the following range (when an overflow
occurs):
2
128
| Operation result |
––
––
––
––
Calculates an angle (radian
v
alue)
by TAN
-1
operation ( )
Con
v
erts the radian
v
alue
into an angle ( )
Con
v
erts the angle in
32-bit floating-point real
number into an integer ( )
Outputs the integer-con
v
erted
angle to a display de
v
ice ( )
1
2
3
4
Step
I
nstruct
i
on
De
vi
ce
Con
v
ersion to BIN
32-bit floating-point
real number
D21
D20
INT
BCD operation
BCD
ATAN
Con
v
ersion to angle
DEG
Y4F
BCD
v
alue
0 0 4 5
Y40
D30
b15
b0
BIN
v
alue
45
32-bit floating-point
real number
D1
1
D0
32-bit floating-point
real number
D11
D10
TAN
-1
operation
0 . 7 8 5 3 9 8
4 5