What is the difference between PLC Siemens S7-200smart and S7-1200?

Siemens S7-200 smart and S7-1200 are two PLC product series launched by Siemens for industrial automation control systems. Although they both belong to Siemens' S7 series, there are some differences in functions and performance. The following is an article that makes a detailed comparison between S7-200 smart and S7-1200.

First, let's compare the two PLCs in terms of appearance. S7-200 smart is a compact PLC with a small size, suitable for use in places with limited space. It has 14 digital input/output channels and 10 analog input/output channels, and has basic control functions. The S7-1200 is relatively large and has more I/O channels, including 14 basic digital input/output channels, 8 expandable digital input/output channels, and 2 analog input/output channels. In addition, the S7-1200 also has a communication interface that can be connected with other devices.

Next, let's compare the processing power and performance of these two PLCs. The S7-200 smart uses a 32-bit CPU with a maximum operating frequency of 40 MHz and a lower processing speed. The S7-1200 uses a higher-performance CPU with a maximum operating frequency of 500 MHz and a faster processing speed. This means that the S7-1200 can process control logic and data processing faster.

In terms of functionality, the S7-1200 offers more advanced features than the S7-200 smart. The S7-1200 supports multitasking and can perform multiple tasks at the same time, improving the efficiency of the system. In addition, the S7-1200 also supports functions such as PID control, high-speed counting, and pulse output, making it more flexible in more complex control applications.

In addition to the differences in functions and performance, there are some other differences between the two PLCs. For example, the S7-1200 has a larger memory capacity and can store more user programs and data. It also supports expansion modules, which can add additional I/O channels or special function modules as needed. The S7-200 smart does not have these expansion capabilities. In addition, S7-1200 also provides the visual programming software TIA Portal, which makes it easier to write and debug PLC programs.

In summary, although S7-200 smart and S7-1200 are both Siemens PLC products, they have some differences in appearance, processing power, functions and scalability. S7-200 smart is suitable for some simple control tasks, while S7-1200 can better meet the needs of complex control applications. When choosing a PLC, users can make a choice based on specific application requirements.