If a label value equals expression, execute its accompanying statementlist.
如果标记的值等于表达式,则执行其相伴的语句列表。
2
If the condition evaluates to TRUE, the statementlist is executed, then control resumes at the top of the loop.
如果条件的求值结果为TRUE,那么就将执行语句列表,在循环的顶部恢复控制。
3
The "write down" programme was to make the instruction programme of statementlist written down into the random of subscriber programme of PLC processor.