Q: My 400 CPU has a touch screen. I use the simulation operation, why can't I connect to the plc? Because I pressed the button on the emulation, I didn't respond to the program. Please help.
A: How to connect winccflexible to the STEP75.4 simulator for simulation test is as follows:
1. Set the DP interface address of the PLC to 4 in the hardware configuration of Step7. In the "Communication" - "Connection" of WinCCflexible, set the "Configuration File" to DP and the "Address" of "hmi Device" to 2, " The "address" of the PLC device is 4.
2. Open PLCSIMV5.4, the default setting is to select the corresponding CPU access node from the project, or select the DP interface of the CPU (address 4) in SelectCPUAccessNode in the File menu, confirm the status bar in the lower part of PLCSIM or DP= 4 information.
3. Check if the Step7 Manager--Option--SetPG/PCinterface S7Online (Step7) has pointed to PLCSIM (Profibus), if not, change it. Download the Step7 hardware configuration and program.
4. Run "Start Runtime" in WinCCflexible and start RT to link to PLCSIM.
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