Once the components are arranged in the station window, the dialog (parameter or address) for changing the default properties is always opened in the following way:
· Double-click the component or select the menu command Edit > Object Properties.
· Right mouse button: Move the cursor over the component, press the right mouse button, and select the Object Properties command from the pop-up menu.
CPU properties
CPU attributes have special meaning for system characteristics. In the dialog box of the CPU, you can set the following items, such as: startup characteristics, local data area and priority for interrupts, memory area, retention performance, clock memory, protection level, and password - just a few examples . STEP 7 "Understand" what can be set and the range of settings.
In the "General" tab of the CPU, or via the CPU interface properties, you can assign parameters to the interface (for example, MPI or integrated PROFIBUS-DP interface). These dialogs also give you access to the properties dialog of the corresponding subnet to be connected to the CPU.
Other methods of assigning parameters For S7-300 and S7 400 programmable controllers, parameters can be set for certain modules in the user program (for example, analog modules). For this purpose, the system functions (SFC) WR_PARM, WR_DPARM and RM_MOD are called in the user program. These settings will be lost after a warm boot.
More detailed information on system functions can be found in the S7-300 and S7-400 System Software, System and Standard Function Reference Manuals. For M7-300 and M7-400 programmable control systems, signal modules can be set up in C programs. parameter. To do this, call the M7 API function "M7StoreRecord" in the C program. This function transfers the parameters to a signal module.
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