Errors in G-Code

Error reporting is also performed for G-Code. This reporting includes compile-time errors and runtime errors. Runtime error reporting includes invalid use of G-Code, e.g. like a bad definition for a circle.

Example:

In the following example the value of a string variable str is assigned to the address letter X of the G-Code block. As before the position of the error is precisely identified at ‘=str’ in the code. In addition, the programmed type and the expected type are reported.

FILE aaa.nc:

{
VAR
    str : string := 'Hello World';
END_VAR
}

G01 X=str F6000
G01 Y100
M02

Error message:

7.5-7.9: Invalid implicit conversion from type 'string[255]'
to 'lreal'

Example:

In the following example a sequence of circular arcs is processed by a FOR-loop. The radius of the arc is 4. The distance between the starting-point and endpoint of the arc is successively increased within each iteration. During the 9^th iteration the distance exceeds the circle diameter of 8. The reported error message identifies the origin G2 X=i*10+i U4 and gives information about the diameter and distance between starting-point and endpoint.

FILE aaa.nc:

{
VAR
    i : INT;
END_VAR

!G00 X0 Y0 Z0
FOR i := 1 TO 10 DO
    !G01 X=i*10 F6000
    !G02 X=i*10+i U4
END_FOR;
}
M02

Error Message:

aaa.nc: 9.4-10.1: Invalid definition of circle. Distance
between start-point and end-point (=9.000000) is larger than
diameter (=8.000000).