西门子400冗余程序，下载FC块是提示：
（D235）The block contains an incorrect checksum.
点击help后，提示如下：
Help on Message 33:53813
Des cription:
The CPU detected an error in the checksum of a block .
Remedy:
1.Create new blocks and load them to your CPU.
2.Contact the manufacturer if the error occurs again
我把现场的程序一改就提示这个,但如果在该块里复制同样的逻辑就不提示,现在想不让CPU停止,尽量少改动,这个错误如何解决呢?请各位大侠指点迷津!