SIMATIC S7-200 PLC & SIMATIC S7-300 PLC &SIMATIC S7-400 PLC

1. SIMATIC S7-200 PLC is an ultra compact PLC that is suitable for automatic detection, monitoring, and control in various industries and occasions. The powerful functions of S7-200 PLC enable it to achieve complex control functions whether running alone or connected to a network. S7-200 PLC can provide 4 different basic models and 8 types of CPUs for selection.

2. SIMATIC S7-300 PLC S7-300 is a modular small PLC system that can meet applications with moderate performance requirements. Various individual modules can be widely combined to form systems with different requirements. Compared with S7-200 PLC, S7-300 PLC adopts a modular structure and has a high-speed (0.6~0.1 μ s) instruction operation speed; More complex arithmetic operations have been effectively implemented using floating-point operations; A software tool with a standard user interface that facilitates users to assign parameters to all modules; The convenient human-machine interface service has been integrated into the S7-300 operating system, greatly reducing the programming requirements for human-machine dialogue. The SIMATIC human-machine interface (HMI) retrieves data from S7-300, and S7-300 transmits this data at a user specified refresh rate. The S7-300 operating system automatically processes the transmission of data; The intelligent diagnostic system of the CPU continuously monitors whether the system's functions are normal, records errors and special system events (such as timeouts, module replacements, etc.); Multi level password protection can effectively protect users' technical secrets and prevent unauthorized copying and modification; The S7-300 PLC is equipped with an operation mode selection switch, which can be pulled out like a key. When the key is pulled out, the operation mode cannot be changed, which can prevent illegal deletion or rewriting of user programs. With powerful communication capabilities, the S7-300 PLC can provide communication configuration functions through the user interface of programming software Step 7, making configuration very easy and simple. The S7-300 PLC has multiple communication interfaces and connects to the AS-I bus interface and industrial Ethernet bus system through various communication processors; Serial communication processors are used to connect point-to-point communication systems; Multipoint Interface (MPI) is integrated into the CPU, used to simultaneously connect programmers, PCs, human-machine interface systems, and other SIMATIC S7/M7/C7 automation control systems.

3. SIMATIC S7-400 PLC is a programmable controller used in the mid to high performance range. The S7-400 PLC adopts a modular fanless design, which is reliable and durable. It can also use CPUs of multiple levels (with gradually upgraded functions) and is equipped with templates for various general functions, allowing users to combine them into different specialized systems according to their needs. When the scale of the control system is expanded or upgraded, as long as some templates are appropriately added, the system can be upgraded and fully meet the needs.