4-point reason analysis that cannot be forced in the program during simulation

A: Why can't I force it in the program during simulation?
------------- This is a mandatory issue and has nothing to do with simulation.
The differences between PLCSIM and the actual PLC system are as follows:
1. Diagnostic buffer: All error messages written to the diagnostic buffer cannot be supported. For example, the CPU's low battery message or EEPRON error cannot be simulated. But most IO program errors can be simulated.
2. There is no safe state in the input and output of changing the operating mode.
3. FM function modules are not supported.
4, does not support peer-to-peer communication
5, PLCSIM and 400CPU support 4 accumulators. In some cases, the program running on PLCSIM runs differently than the actual 300 CPU with only 2 accumulators.

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