PROGRAMMING15. CUSTOM MACRO
B–63604EN/01
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Specify a conditional expression after IF. IF [<conditional expression>]
GOTO n If the specified conditional expression is satisfied, a branch to
sequence number n occurs. If the specified condition is not satisfied, the
next block is executed.
IF [#1 GT 10] GOTO 2 ;
N2 G00 G91 X10.0 ;
:
If the value of variable #1 is greater than 10, a branch to sequence number
N2 occurs.
If the condition
is not satisfied
Processing If the condition is satisfied
If the specified conditional expression is satisfied, a predetermined macro
statement is executed. Only a single macro statement is executed.
If the values of #1 and #2 are the same, 0 is assigned to #3.
IF [#1 EQ #2] THEN #3=0;
A conditional expression must include an operator inserted between two
variables or between a variable and constant, and must be enclosed in
brackets ([, ]). An expression can be used instead of a variable.
Operators each consist of two letters and are used to compare two values
to determine whether they are equal or one value is smaller or greater than
the other value. Note that the inequality sign cannot be used.
Table 15.5.2 Operators
Operator Meaning
EQ
Equal to(=)
NE
Not equal to(0)
GT
Greater than(>)
GE
Greater than or equal to(y)
LT
Less than(<)
LE
Less than or equal to(x)
The sample program below finds the total of numbers 1 to 10.
O9500;
#1=0;Initial value of the variable to hold the sum
#2=1;Initial value of the variable as an addend
N1 IF[#2 GT 10] GOTO 2; Branch to N2 when the addend is greater than.
10
#1=#1+#2; Calculation to find the sum
#2=#2+1; Next addend
GOTO 1; Branch to N1
N2 M30;End of program
15.5.2
Conditional Branch
(IF Statement)
IF[<conditional
expression>]THEN
Explanations
D Conditional expression
D Operators
Sample program