What is the maximum number of networks allowed in a Step 7 program limited by?

In Siemens Step 7 programming, the maximum number of networks is primarily constrained by the memory size available in the PLC (Programmable Logic Controller). Each network in a Step 7 program requires a certain amount of memory for storage and execution. As the program grows in complexity and size, it consumes more memory. Therefore, the total number of networks that can be effectively utilized in a project is ultimately limited by the available memory resources of the device.

The other factors mentioned, such as the complexity of the program, size of the user interface, and the number of connected devices, do not have a direct or fixed limit on the number of networks. While these elements can affect program performance and management, the bottleneck for the maximum number of networks is fundamentally tied to the memory capacity of the PLC being used.