Mitsubishi Electronics FX3G User Manual

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3S

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3G

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3GC

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3U

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3UC

 Series

Programming Manual - Basic & Applied Instruction Edition

18 Floating Point – FNC110 to FNC139

This instruction executes COS

−1

 (arc cosine) operation.

→ For handling of floating point, refer to Subsection 5.1.3.

An angle is obtained from the cosine value stored in [

+1, 

], and stored to [

+1, 

].

A real number can be directly specified as 

.

• The cosine value stored in [

+1, 

] can be set ranging from 

−1.0 to +1.0.

• The angle (operation result) stored in [

+1, 

] is expressed in radians (from 0 to 

π).

For conversion between radians and degrees, refer to the RAD (FNC136) and DEG (FNC137) instructions.

→ For the RAD (FNC136) instruction, refer to Section 18.24.
→ For the DEG (FNC137) instruction, refer to Section 18.25.

An operation error is caused in the following case; The error flag M8067 turns ON, and the error code is stored in
D8067.

• When a value specified in 

 is outside the range from 

−1.0 to +1.0 (error code: K6706)

Head device number storing a cosine value used in COS

−1

 (arc cosine) operation

Real number (binary)

Head device number storing the operation result

System User

Digit Specification

System User

Special 

Unit

Index

Con-
stant

Real 

Number

Charac-

ter String

Pointer

X Y M T C S D .b KnX KnY KnM KnS T C D R U \G

V Z Modify K H

E

" "

P

−
−

Mnemonic

Operation Condition

16-bit Instruction

DACOS

DACOSP

Mnemonic

Operation Condition

32-bit Instruction

9 steps

Continuous

Operation
Pulse (Single)

Operation

P

FNC 134

ACOS

D

  S

  D

  S

  D

   

S

   

S

   

D

   

D

   

S

Command

input

FNC134

DACOS

S 

D 

+1

Binary floating point

(real number)

+1

Binary floating point

(real number)

COS

−1

S 

S 

D 

D 

   

S

   

S

   

D

   

D

   

S