6ES7953-8LL20-0AA0 Siemens SIMATIC S7 MICRO MEMORY CARD

Product parameters

Basic parameters: The storage type is 3.3V Nflash, and the storage capacity is 512KByte. It is specially designed for Siemens S7-300/C7/ET200 series devices and is an essential accessory for CPU operation.

Environmental parameters: Adapted to complex industrial working conditions, referring to the characteristics of the same series of products, it can usually operate stably within a temperature range of -25 ℃ to 85℃ and in a relatively high humidity environment. The protection level complies with the conventional standards of industrial equipment and can operate normally in a cabinet with an IP20 protection level.

Performance parameters: Supports power-off data backup and can store up to 64KB of retention data. The diagnostic buffer can store 500 error and interrupt events, among which 100 events can be retained for a long time. The data transmission and read-write speeds are adapted to the operational requirements of the S7-300 series cpus, enabling rapid program downloading and data storage.

Function

Program and data storage: As the loading memory of the PLC, it can store user programs (including symbols and comments) as well as formula data and process data generated during operation, providing core data support for CPU operation and meeting the storage requirements of medium-scale programs.

Security protection and data backup: Supports password protection for user programs to prevent illegal access and modification; When power is cut off, the CPU will automatically write all retained data to the memory card. After power is restored, the data remains unchanged, achieving maintenance-free data backup and reducing the risk of data loss.

Diagnosis and debugging assistance: By storing faults and interrupt events in the diagnostic buffer, it provides a basis for fault detection. When used in conjunction with a programmer, it can display the signal status during the program execution process, support modifying process variables and outputting stack contents, which is convenient for program debugging and testing.

Parameter configuration and communication adaptation: Parameters such as the MPI multi-point interface address, cycle time, and hold range can be configured through the STEP 7 software. It supports communication with programming devices (PG) and operation panels (OP), and can also achieve global data exchange among multiple cpus and basic S7 communication functions.

Application scenarios

Industrial automation production line: Compatible with equipment such as CPU 314 that has high requirements for processing capacity and response speed, it stores production line control programs, such as the action logic of mechanical arms and the control of conveyor belt operation parameters, to achieve automated monitoring and precise control of the production process, ensuring the continuous and stable operation of the production line.

Process industry control: In process industries such as petrochemicals and power systems, it is used in conjunction with the S7-300 series PLC to store signal acquisition and equipment control programs, transmitting and storing a large amount of production process data in real time to ensure the safety and controllability of the production process.

Small and medium-sized automation systems: Suitable for small-scale applications with medium process performance requirements, such as the control scenarios of single-machine non-networked equipment, they can connect I/O devices through centralized configuration to achieve integrated communication, data management and other functions, meeting the needs of simple automation tasks.

Building and infrastructure automation: Control systems for lighting, air conditioning, etc. in smart buildings, storing device control programs and energy consumption data, helping to enhance the efficiency of building automation management and optimize energy allocation.

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