一个DO_ l0功能块执行时才被刷新。由于有这个延时，大部分使用DO_ l0和SUS_ 10的程序，把SUS_ 10功能块放在第一梯级，处理输入的DO_ _I0功能块放在下一个梯级，处理输出的DO_ l0功能块放在最后-一个梯级。DO_ 10功能块处理输出点的范围从%Q00001到%Q00030。如果在这个范围内的模块是一个32点的模块，DO_ l0功能块执行对整个模块的扫描，不会把/0模块从中间分开扫描。
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