6ES7288-1ST20-0AA1 Siemens SIMATIC S7-200 SMART CPU ST20 Standard CPU

Product parameters

Power supply parameters: It adopts the DC/DC/DC power supply mode, and the power input range is 20.4-28.8V DC. The maximum output of the sensor power supply is 300mA (24V DC), and the maximum output of the backplane bus (5V DC) is 1.4A. The maximum power consumption is 14W.

Storage parameters: The program/data memory capacity is 20KB, and it supports microSDHC card expansion storage. Integrated maintenance-free real-time clock (RTC), buffer duration of 7 days, maximum daily deviation of 120 seconds at 25℃.

Computing performance: Typical processing time for bit operations is 150ns, for word operations 1.2μs, and for floating-point operations 3.6μs. It is equipped with 6 high-speed counters (HSCS), including 4 single-phase 200kHz and 2 single-phase 30kHz, or 2 A/B phase 100kHz and 2 A/B phase 20kHz.

I/O parameters: 12 channels of digital input (24V DC) and 8 channels of digital output (24V DC) on board; The digital input signal "0" corresponds to ≤5V DC (1mA), the signal "1" corresponds to ≥15V DC (2.5mA), and the input delay is 0.2-12.8ms (parameterizable). The maximum load current of the digital output is 2A, and the switching frequency is compatible with the control requirements of various industrial equipment.

Interface parameters: 1 PROFINET industrial Ethernet interface (RJ45), supporting 10/100Mbit/s adaptive, can be used as an IO controller (up to 8 IO devices can be connected) or a smart device; It features 1 RS485 interface with a maximum transmission rate of 187.5Mbps, supporting S7 communication and PROFIBUS DP protocol (requiring a CM DP module).

Mechanical and environmental parameters: It adopts a rail installation method, and its external dimensions are compatible with standard industrial control cabinets. Net weight approximately 0.39kg; The operating environment temperature is -20 ℃ to 60℃, and the storage temperature is -40 ℃ to 70℃. Relative humidity ≤95% (no condensation at 25℃), protection grade IP20; It complies with the IEC 61000-4 series anti-interference standards, with an anti-static voltage of 8kV for air discharge and 4kV for contact discharge.

Function

Logic and process control functions: Supports programming languages such as ladder diagrams and function block diagrams, and realizes complex logical operations through a rich instruction set, meeting the requirements of automated process control such as production line start-stop and equipment linkage. It integrates an 8-channel PID closed-loop control loop, supporting continuous output, binary output and automatic/manual mode switching, and can precisely adjust process parameters such as temperature and pressure.

Communication interaction function: High-speed data interaction is achieved through the PROFINET interface, with a minimum update time of 4ms, and it can be quickly networked with devices such as HMI and frequency converters. The RS485 interface supports S7 communication (as a server or client), and with the expansion module, it can be connected to the PROFIBUS DP network to achieve multi-device collaborative control.

Expansion and debugging functions: Supports the expansion of 1 signal board and 6 signal modules, and can flexibly add analog I/O, special function modules, etc. Combined with the STEP 7 Micro/WIN SMART programming software, it has the functions of program forcing and online diagnosis, and can quickly complete program download, parameter configuration and fault troubleshooting.

Web server function: Built-in Web server, supporting remote access to the device status page through a browser, real-time viewing of I/O point status, program operation data and fault information. Remote monitoring and simple parameter adjustment can be achieved without installing dedicated software.

Application scenarios

Industrial machinery and equipment control: In single-machine automation scenarios such as packaging machinery, printing equipment, and CNC machine tools, it controls the positioning of the movement axes of the equipment, the actions of actuators, and the collection of sensor signals. Through high-speed counters, precise positioning of workpieces is achieved, enhancing the operational accuracy and production efficiency of the equipment.

Automation of small-scale production lines: Applicable to small-scale production lines such as electronic component assembly lines and small household appliance production lines, it connects conveyor belts, sorters, inspection equipment, etc., to achieve automatic switching and coordinated operation between processes. Through PID control, it ensures the stability of parameters such as temperature and pressure during the production process.

New energy equipment monitoring: Compatible with new energy scenarios such as photovoltaic inverters and energy storage battery management systems, it collects equipment operation data (analog quantity modules need to be expanded), and uploads it to the monitoring platform through the PROFINET interface to achieve equipment status monitoring and fault early warning, ensuring the stable operation of the new energy system.

Intelligent warehousing equipment control: It is used for the control of stacker cranes, conveyor belts and other equipment in small stereoscopic warehouses. Through high-speed counters, the position of goods is accurately identified, and photoelectric sensors are linked to achieve automatic sorting and handling of goods, improving the efficiency of warehousing and logistics. Support communication with the warehouse Management system (WMS) to achieve order information interaction and task scheduling.

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