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7-273

ATAND(P)

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.12 Special function

 instructions

7

.12.12 TAN

 -1 oper

ation on floatin

g-point

 data (

D

ouble pre

cision)

 (ATAND

(P))

TAN 

-1

 operation on floating-point data (Double precision)

 (ATAND(P))

ATAND(P)

Function

(1) The angle is calculated from the TAN (tangent) value specified by 

 is and its result is 

stored into the device specified by 

.

(2) 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 
RADD and DEGD instructions.

(3) When the operation results in -0 or an underflow, the result is processed as 0.

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.
 • The value of the specified device is not in the following range:

(Error code: 4140)

0,2

-1022

 

 | value of specified device | < 2

1024

 • The value of the designated device is  0. 

(Error code: 4140)

 • The result exceeds the following range (Operation results in an overflow):

2

1024

 

 | Operation result | 

 (Error code: 4141)

: TAN value of which the TAN

-1

 (inverse tangent) value is obtained or head number of the devices where the 

TAN value is stored (real number)

: Head number of the devices where the operation result will be stored (real number)

Setting 

Data

Internal Devices 

R, ZR

J

\

U

\G

Zn

Constants

E

Other

Bit

Word

Bit

Word

––

––

––

––

––

––

––

Basic

Process

High

performance

Redundant

Command

Command

ATANDP

ATAND

ATANDP

ATAND

S

D

S

D

S

D

S

D

S

D

)

TAN   (

1

+3

S

+2

S

S

+1

S

+3

D

+2

D

D

+1

D

64-bit floating-point
real number

64-bit floating-point
real number

D