What Is PLC Memory?
The portion of a programmable logic controller known as the PLC memory is responsible for storing data, information, and programmable instructions. It encompasses a variety of memory types, including random-access memory (RAM), read-only memory (ROM), and non-volatile memory.
The random-access memory (RAM) is used for the temporary storing of data, and it is deleted when the power is turned off. The firmware and the fundamental instructions are stored in the ROM.
EEPROM and flash memory are examples of non-volatile memory.
These types of memory save the user program and continue to store data even after the power is turned off. PLCs that have memory management systems that are effective ensure that automation processes run smoothly and dependably.
Memory Types Used in PLCs;
A PLC’s memory is an essential component for the storage of programs and data that is essential for control. It can be broken down into the respective types as follows:
1). Read-Only Memory (ROM)
2). Random Access Memory (RAM)
3). EEPROM (Electrically Erasable Programmable Read-Only Memory)
4). Flash Memory
5). Battery-Backed Memory
1). Read-Only Memory (ROM)
Read-Only Memory (ROM) is a type of memory is utilized to store firmware, which includes the operating system of the PLC. While the system is in operation, this memory cannot be altered.
2). Random Access Memory (RAM)
Random Access Memory (RAM) is a type of memory that is utilized to store temporary data while a program is being executed. In the event that power is lost, its contents are deleted.
3). EEPROM (Electrically Erasable Programmable Read-Only Memory)
EEPROM, which stands for “Electrically Erasable Programmable Read-Only Memory,” is a type of memory that stores data and programs that must be kept even if the power is turned off. It is open to changing.
4). Flash Memory
This type of memory is utilized for the storage of programs and can be found in modern PLCs. Similar to EEPROM, but with a greater capacity, it is a similar device.
5). Battery-Backed Memory
Battery-Backed Memory is a type of memory saves data even when the power goes out by utilizing an internal battery.
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