513
ACOS, ACOSP
1
2
3
4
4
6
7
8
7.12 Special function instructions
7.12.9 ACOS, ACOSP
: COS value of which the COS
-1
(inverse cosine) value is obtained or head number of the devices where the COS value is stored (real number)
: Head number of the devices where the operation result will be stored (real number)
*1: Applicable for the Universal model QCPU, LCPU.
Function
(1) Returns the COS
-1
angle of the COS value designated by , and stores operation result at word device designated by
.
(2) The COS value designated by can be in the range of from -1.0 to 1.0.
(3) The angle (operation result) stored at is stored in radian units.
For more information on the conversion between radian and angle data, see description of RAD and DEG instructions.
Operation Error
(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.
7.12.9 ACOS, ACOSP Arc cosine operation on floati ng-point data (Si ngle
precision)
7.12.9
ACOS, ACOSP
Setting
Data
Internal Devices
R, ZR
J\
U\G
Zn
Constants
E
Other
Bit Word Bit Word
–– ––
*1
––
–– ––
*1
–– ––
Error
code
Error details
Q00J/
Q00/
Q01
QnH QnPH QnPRH QnU LCPU
4100
The value specified in is not within the range between -1.0 and 1.0.
––
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 |
–– –– –– ––
Process
High
performance
Redundant
Universal
LCPU
Basic
Command
Command
ACOSP
ACOS
ACOSP
ACOS S D
S D
S
D
S
D
S
D
+1
+1
S
D
S
D
COS
-1
32-bit floating-point
real number
)
32-bit floating-point
real number
S
D
S
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