Memory Configuration (S7); Brief Description - Siemens SINUMERIK 840D sl Function Manual

Memory Configuration (S7)

15.1

Brief description

Memory types
To store and manage data, the NC requires a static memory and a dynamic memory:
● Static NC memory
● Dynamic NC memory
Memory organization
The memory areas of the individual data groups in the static and dynamic NC memories
have defined sizes, which are fixed when the memory is configured.
This type of memory organization ensures the deterministic behavior of the control: The
reserved memory area is guaranteed throughout part program processing.
Memory configuration
When booted for the first time, the system enters default values in all other memory-
configuration machine data. This configuration is adequate in most cases. However, the
machine manufacturer/user can make changes at any time (Reconfiguration).
Extended Functions
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
In the static NC memory, the program data (part programs, cycles, etc.) and the current
system and user data (tool management, global user data, etc.) is saved to persistent
memory.
In the dynamic NC memory the data is saved to non-persistent memory. The data here
concerns information generated by the NC that is only required for a limited time (e.g.,
macros, local user data, interpolation buffer, etc.).
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