Arc Cosine Operation - Mitsubishi Electric MELSEC iQ-F FX5 Programming Manual

19.10

Arc Cosine Operation

ACOS(_E)
These functions output the arc cosine value of an input value.
Ladder diagram, FBD/LD
[Without EN/ENO]
s d
Setting data
■Descriptions, types, and data types
Argument Description
EN Execution condition (TRUE: Execution, FALSE: Stop)
s(IN) Input
ENO Output status (TRUE: Normal, FALSE: Abnormal)
d(ACOS(_E)) Output
Processing details
■Operation processing
• These functions calculate the arc cosine of the REAL type data input to (s), and output from (d).
• These functions are expressed as follows when the input value is "A" and the output operation result is "B".
-1
B=COS A
• A value input to (s) is the REAL type data value and within the following range.
ACOS(_E): -1.0 to 1.0
• A value (angle) in radians (angle/180) is output from (d).
■Operation result
1.
Function without EN/ENO
The following table lists the operation results.
Operation result
No operation error occurred
An operation error occurred
2.
Function with EN/ENO
The following table lists the execution conditions and operation results.
Execution condition
EN
TRUE (Executes operation)
FALSE (Stops operation)
*1 When FALSE is output from ENO, data output from (d) is undefined. In that case, modify a program so that the data output from (d) is
not used.
Operation error
Error code Description
(SD0/SD8067)
3402H A negative value is input.
3405H A value input by these functions is other than -1.0 to 1.0.
[With EN/ENO]
EN ENO
s d
Operation result
ENO
TRUE (Operation error did not occur)
*1
FALSE
Structured text
[Without EN/ENO]
d:=ACOS(s);
[With EN/ENO]
d:=ACOS_E(EN,ENO,s);
Type
Input variable
Input variable
Output variable
Output variable
(d)
Operation output value
Indefinite value
(d)
Operation output value
Indefinite value
19 SINGLE NUMBER VARIABLE FUNCTIONS
Data type
BOOL
REAL
BOOL
REAL
19.10 Arc Cosine Operation
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