6ES7953-8LL31-0AA0 Siemens SIMATIC S7 Micro Memory Card

Product parameters

Electrical and performance parameters: Operating voltage 3.3V, storage capacity 8MB, using MLC flash memory chip, with a lifespan of 100,000 erase/write cycles (10 times that of a regular SD card). The write speed is no less than 5MB/s, allowing for quick program download. The diagnostic buffer can store fault and interruption events, providing data support for equipment maintenance.

Environmental parameters: Adapted to harsh industrial environments, with a working temperature range of -40 ℃ to 85℃, it can operate stably in high or low temperature scenarios such as metallurgy and boilers. The seismic performance reaches 15g@11ms (semi-sine wave), which can adapt to the working conditions of equipment with frequent vibrations. The data can be stably maintained for at least 10 years under a 25℃ environment.

Function

Program and data storage: As the essential loading memory for the S7-300 series PLC (new cpus do not have built-in loading memory), it can store user programs (including symbols and comments), formula data and process data, and support the maximum storage requirements of models such as CPU 313 and CPU 314.

Power-off data protection: When the device is powered off, the CPU will automatically copy the retained data (such as DB block data) in the working memory to this memory card. After power-on, the data can be fully restored without additional maintenance, achieving data backup and reducing the risk of data loss.

Program transmission and debugging: Supports downloading programs via STEP 7 software. Programs can be written in various ways such as "overall download" and "copy RAM to ROM". When used in conjunction with a programmer, it can view the execution status of the program, modify process variables, and facilitate debugging and troubleshooting.

Passive formatting function: When the program download is interrupted, the hardware configuration does not match, or the data in the card is abnormal, the CPU's STOP light flashes slowly. At this time, the MRES button can be used to perform passive formatting to clear error messages and restore the function of the memory card.

Application scenarios

Heavy industry production line control: In high-temperature and high-vibration heavy industry scenarios such as metallurgy and steel, it works in conjunction with the S7-300 series PLC to store production line control programs (such as the action logic of rolling mill equipment, material transfer parameters, etc.), ensuring stable program storage with its wide temperature range and shock resistance characteristics.

Process industry monitoring system: Applicable to process industries such as petrochemicals and power, it stores signal acquisition and equipment control programs, saves process data such as pressure and temperature in real time, ensures the safety and controllability of the production process, and provides a basis for later data analysis and optimization.

Small and medium-sized automation equipment: Compatible with small and medium-sized PLCS such as CPU 313 and CPU 314, it is used for storing control programs of single machines or small production lines, such as the operation logic data storage of packaging machinery and injection molding equipment, meeting the storage requirements of medium-scale programs.

Intelligent warehousing and logistics system: In the context of automated warehousing, it stores the control programs and inventory data of logistics equipment (such as conveyor belts and stackers), facilitating intelligent inventory management and efficient logistics scheduling.

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