IAI X-SEL

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INTELLIGENT ACTUATOR
Part 3 Controller Data Structure
3) Variables with “*” (asterisk) (indirect specification)
An “*” (asterisk) is used to specify a variable.
In the following example, the content of variable box 1 will be put in variable box 2. If variable
box 1 contains “1234,” then “1234” will be put in variable box 2.
Command Operand 1 Operand 2
LET 1 1234
Command Operand 1 Operand 2
LET 2 *1
The above use of variables is called “indirect specification.”
An “*” is also used when indirectly specifying a symbol variable (refer to 1.8, “Symbols”).
Command Operand 1 Operand 2
LET ABC 1 Put 1 in variable ABC.
LET BCD 2 Put 2 in variable BCD.
ADD ABC *BCD
Add the content of variable BCD, or 2, to
variable ABC.
(The content of variable ABC becomes 3.)
Variable
box 1
1 2 3 4
1 2 3 4
Put in.
Variable
box 1
Variable
box 2
1 2 3 4
1 2 3 4