Siemens SINUMERIK 828D Programming Manual

Flexible NC programming
1.10 Program jumps and branches
Job planning
Programming Manual, 07/2010, 6FC5398-2BP40-0BA0
89
Example 4: Jump with jump condition
Program code Comments
N40 R1=30 R2=60 R3=10 R4=11 R5=50 R6=20 ; Assignment of the initial values.
N41 LA1: G0 X=R2*COS(R1)+R5 Y=R2*SIN(R1)+R6 ; Jump marker LA1 set.
N42 R1=R1+R3 R4=R4-1
N43 IF R4>0 GOTOB LA1 ; If the jump condition is
fulfilled, then a jump in the
direction of the beginning of the
program to jump marker LA1.
N44 M30 ; End of program
1.10.3 Program branch (CASE ... OF ... DEFAULT ...)
Function
The CASE function provides the possibility of checking the actual value (type: INT) of a
variable or an arithmetic function and, depending on the result, to jump to different positions
in the program.
Syntax
CASE(<expression>) OF <constant_1> GOTOF <jump destination_1>
<constant_2> GOTOF <jump destination_2> ... DEFAULT GOTOF <jump
destination_n>
Significance
CASE: Jump statement
<expression>: Variable or arithmetic function
OF: Keyword to formulate conditional program branches.
First specify constant value for the variable or arithmetic function
<constant_1>:
Type: INT
Second specified constant value for the variable or arithmetic
function
<constant_2>:
Type: INT
DEFAULT: For the cases where the variable or arithmetic function does not
assume any of the specified constant values, the DEFAULT
instruction can be used to determine the branch destination.
Note:
If the DEFAULT instruction is not programmed, then in these
cases, the block following the CASE instruction is the jump
destination.

Siemens SINUMERIK 828D Specifications

General

Brand	Siemens
Model	SINUMERIK 828D
Category	Control Systems
Language	English