Buffer Memory; Configuration Of The Buffer Memory - Mitsubishi Electric MELSEC-L SERIES Basic User Manual

3.5

Buffer Memory

This section describes the E71 buffer memory.
3.5.1

Configuration of the buffer memory

This section describes a buffer memory configuration.
(1) Buffer memory address configuration
A buffer memory area consists of 16 bits per address.
(2) Buffer memory area configuration
Buffer memory consists of user areas and system areas.
(a) User areas
A user area is an area where a user writes or reads data. A user area consists of a parameter area for the initial
process and data communications, an area for data communications, and an area to store communication
status and communication error data. Data communications may take long if user areas are used continually;
therefore, use them only when needed.
(b) System areas
A system area is an area used by a system.
Do not write any data to the "system area". Doing so may cause malfunction of the programmable controller system.
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