CPU在线指出错误：
Area length error when reading
Internal error,incoming event

帮助文档指出:
Causes:

?The value addressed using the access address is outside or not completely within the permitted address range (the range varies depending on the particular CPU).

?Due to a faulty address calculation, the value addressed is > 65535. For indirect addressing, an address value greater than 65535 can occur due to faulty calculation. This value cannot be correctly entered in the detailed information for the event. In this case, a 0 will be entered an displayed as the access address for S7-300, and for the S7-400, the calculated value modulo 65535 will be displayed and entered as the access address.

To correct or avoid errors:

?Select the access address so that the addressed value is completely within the permitted address range.

?Check your user program.

另外：
step 7在线监测显示模拟量：这个地址不能被检测。


请大家多多指教!!!万分感谢!!!