Yaskawa MotionWorks IEC Toolboxes - Manual (Page 326)

Math Toolbox
MotionWorks IEC61131-3 Toolboxes: 2013-09-13 313
Function Blocks
ATAN2
The ATAN2 function is useful in many applications involving vectors, such as finding the direction from one point
to another. This two argument function is a variation of the ATAN function. For any LREAL arguments x and y,
atan2(y, x) is the angle between the positive x-axis of a plane and the point given by the coordinates (x, y) on
it.
Parameters
* Parameter Data
Type Description
VAR_INPUT Default
B EN BOOL
This function will continue to calculate the ATAN2
result while EN is held high.
FALSE
V X LREAL X coordinate LREAL#0.0
V Y LREAL Y coordinate LREAL#0.0
V Output_Format INT
Format of the output value.
0: radians (-pi, pi]
1: radians [0, 2*pi)
2: degrees [0°, 360°)
INT#0
VAR_OUTPUT
B ENO BOOL
ENO will be high is EN is high and this function can calculate the
Angle
V Angle LREAL The result of the ATAN2 calculation
Notes