Calculating The Arc Cosine - Mitsubishi Electric MELSEC iQ-R Series Programming Manual

26.10

Calculating the Arc Cosine

ACOS(_E)
RnPCPU
RnCPU RnENCPU
(Process)
These functions output the arc cosine (COS
Ladder, FBD/LD
[Without EN/ENO]
s d
Setting data
■Description, type, data type
Argument
EN
s (IN)
ENO
d
Processing details
■Operation processing
• These functions calculate the arc cosine (COS
from (d).
• When the input value is defined as A and the output value is defined as B, the relationship of A and B will be as follows:
-1
B=COS A
• Input a REAL data type value to (s) within the following range.
ACOS(_E): -1.0 to 1.0
• The value (angle) is output from (d) in radians (angle/180).
■Operation result
1.
Function without EN/ENO
The operation processing is performed. The operation result is output from (d).
2.
Function with EN/ENO
The execution conditions and operation results will be as follows.
Execution condition
EN
TRUE (executed)
FALSE (not executed)
*1 If the value FALSE is output from ENO, the output data from (d) will be undefined. Create a program so that the undefined value will not
be used in operations.
Operation error
Error code Description
(SD0)
3402H The input value is -0.
3405H The value input with ACOS(_E) is other than -1.0 to 1.0.
26 SINGLE VARIABLE FUNCTIONS
1904
26.10 Calculating the Arc Cosine
RnPCPU RnSFCPU RnSFCPU
(Redundant) (Standard) (Safety)
-1
) of an input value.
[With EN/ENO]
EN ENO
s
Description
Execution condition (TRUE: Executed, FALSE: Not executed)
Input
Output status (TRUE: Normal, FALSE: Abnormal)
Output
Operation result
ENO
TRUE
FALSE
Structured text
[Without EN/ENO]
d:=ACOS(s);
[With EN/ENO]
d:=ACOS_E(EN,ENO,s);
d
-1
) of the REAL data type value input to (s), and output the operation result
*1
Type Data type
Input variable BOOL
Input variable ANY_REAL
Output variable BOOL
Output variable ANY_REAL
(d)
Operation result output value
Undefined value