10 NC Start-Up with HMI Advanced
10.4 Memory configuration
Axis-specific ($MA_ ...)
Machine data required to configure the SRAM
General ($MN_ ...)
Number of block elements for Compile cycles
Size of block memory for Compile cycles
Heap memory for compile cycle applications
Number of simultaneously active protection zones /FB/, A3
Stack size of preparation task
Stack size of IPO task
Available memory for internal blocks
Number of values for quadrant error
The free SRAM memory is displayed in machine data
MD18060: INFO_FREE_MEM_DYNAMIC (free static memory).
The free SRAM should not be less than 15,000 bytes to ensure that data (e.g.
tool offsets) can be read in at all times.
Modifying the machine data listed in Table 10-14 results in a reconfiguration of
the SRAM with a loss of all user data. Before the change comes into effect in
the NC, the following alarm message is output:
Alarm: "4400 MD change results in reorganization of the non–volatile
memory (loss of data!)"
When reconfiguring the SRAM memory, all user data are lost. To prevent data
loss, a series machine start-up file should be created prior to reconfiguration
(see Section 14.2, Page 14-451).
Display data of the free static memory
Screen form for reserving memory for the tool
Number of tools managed by NCK
Number of magazines managed by NCK
Number of magazine locations
Compile cycles of tool management: Number of
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SINUMERIK 840Di Manual (HBI) – 06.03 Edition