Siemens SINUMERIK 808D Function Manual page 233

Tag identifier
FOR
Function Manual
01/2017
Meaning
For loop
for (initialization; test; continuation) instruction(s)
Syntax:
<FOR>
<INIT>...</INIT>
<CONDITION>...</CONDITION>
<INCREMENT>...</INCREMENT>
Instructions
...
</FOR>
The For loop is executed as follows:
1. Evaluation of the expression initialization (INIT).
2. Evaluation of the expression test (CONDITION) as a Boolean expression.
If the value is false, the For loop is exited.
3. Execution of the following instructions.
4. Evaluation of the expression continuation (INCREMENT).
5. Continue with 2.
All the variables within the INIT, CONDITION, and INCREMENT branches are declared
and initialized outside the FOR loop.
Example:
<LET name = "count">0</LET>
<FOR>
<INIT>
<OP> count = 0</OP>
</INIT>
<CONDITION> count <= 7 </CONDITION>
<INCREMENT>
<OP> count = count + 1 </OP>
</INCREMENT>
<OP> "plc/qb10" = 1+ count </OP>
</FOR>
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