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MELSEC-Q
11 INSTRUCTIONS AND FUNCTIONS
ON GOTO
Instruction
ON to GOTO
• Branches the program execution to one of several specified line numbers depending on
the value of the specified expression.
ON <expression> GOTO <line number>[,<line number>…]
expression
• • • •
Branches to the specified line number depending on
the value of the expression.
Syntax
line number
• • • •
Specify the line number to which the execution is
branched.
Examples
ON A GOTO 200, 300, 400
• • • •
Branches to line 200 if the value of A is 1, to line 300
if A is 2, and to line 400 if A is 3.
Description
• The ON to GOTO instruction branches the program execution to one of several specified
line numbers depending on the value of the specified expression.
• Digits after the decimal points are truncated if the value of <expression> is not an integer.
• The execution moves to the next instruction if the value of <expression> is 0 or greater
than the number of specified line numbers, which should be 255 or less.
• An “Illegal function call” error occurs if the value of <expression> is negative or greater than
255.
• A label name can be used instead of an actual line number for <line number>.
