Firstly, the appearance design of products represented by Siemens PLC agents is more user-friendly, making it easier for on-site personnel to accept when selecting. The size of the S7-1500 module is slightly larger than that of the S7-300, and the rack is similar to the S7-300. When installing the front connector, there is a wiring position, and specialized power components, shielding brackets, and line cards are provided to make wiring more convenient and reliable; What particularly impresses engineering personnel is the LED display screen on the CPU, which can conveniently display CPU status and fault information.

Secondly, in terms of hardware, S7-1500PLC has faster processing speed, stronger networking capability, higher diagnostic ability and security. It not only saves costs and improves production efficiency, but also is safe, reliable, easy to maintain, and truly becomes the preferred controller for factory customers and on-site maintenance personnel. For example, compared to S7-300/400, S7-1500

PLC adopts a new type of backplane bus technology, using high baud rate and high transmission protocol to make its signal processing speed faster; All CPUs of S7-1500 are integrated with 1-3 PROFINET interfaces, which can achieve low-cost and fast configuration of on-site communication and company network communication. However, only a few CPU models of S7-300/400PLC are integrated with PROFINET interfaces; S7-1500

The module integration of PLC has diagnostic function, with a diagnostic level of channel level, without the need for additional programming. When a fault occurs, it can quickly and accurately identify the affected channel, reducing downtime, which is incomparable to S7-300/400PLC.

Compared to S7-300/400PLC, S7-1500PLC supports a wider range of data types. The basic data type of S7-1500PLC has a maximum length of 64 bits, while S7-300/400