发布于 2012-03-19 09:00:37
14楼
Des cription of instruction
CDB is used to exchange the shared data block and instance data block. The instruction swaps the data block registers. A shared data block becomes an instance data block and vice-versa.
从西门子的F1帮助来看,这两个命令是一样的。
PLCSIM模拟的效果来看也是一样的!有脱裤子放屁的感觉!
If anything can go wrong, it will.