不管有几个累加器，对于累加器一和二来说，执行完push后结果是一样的。但是对于*I后就不一样了，你确定你的400有4个累加器吗？理论上PLCSIM是对的！
*I (multiply 16-bit integer numbers) multiplies the contents of ACCU 2-L by the contents of ACCU 1-L. The contents of ACCU 1-L and ACCU 2-L are interpreted as 16-bit integer numbers. The result is stored in accumulator 1 as a 32-bit integer number. If the status word bits are OV1 = 1 and OS = 1, the result is outside the range of a 16-bit integer number.

The instruction is executed without regard to, and without affecting, the RLO. The status word bits CC 1, CC 0, OS, and OV are set as a function of the result of the instruction.

The contents of accumulator 2 remain unchanged for CPUs with two ACCUs.

The contents of accumulator 3 are copied into accumulator 2, and the contents of accumulator 4 are copied into accumulator 3 for CPUs with four ACCUs.