01/2007
11.4 Memory configuration
11-308
© Siemens AG 2007 All Rights Reserved
SINUMERIK 840Di sl Manual (HBIsl) – 01/2007 Edition
Number Refer-
ence
Name/remarksIdentifier
28040 MM_LUD_VALUES_MEM Memory size for local user variables
28060 MM_IPO_BUFFER_SIZE Number of NC blocks in the IPO buffer
28070 MM_NUM_BLOCKS_IN_PREP Number of blocks for block preparation
28090 MM_NUM_CC_BLOCK_ELEMENTS Number of block elements for Compile cycles
28100 MM_NUM_CC_BLOCK_USER_MEM Size of block memory for Compile cycles
28105 MM_NUM_CC_HEAP_MEM Heap memory for compile cycle applications
28210 MM_NUM_PROTECT_AREA_ACTIVE Number of simultaneously active protection zones /FB/, A3
28500 MM_PREP_TASK_STACK_SIZE Stack size of preparation task
28510 MM_IPO_TASK_STACK_SIZE Stack size of IPO task
28550 MM_PRSATZ_MEM_SIZE Available memory for internal blocks
Axis–specific ($MA_ ... )
38010 MM_QEC_MAX_POINTS Number of values for quadrant error
compensation
/FB/, K3
/IAD/
11.4.2 SRAM memory
The free SRAM memory is displayed in machine data
S MD18060: INFO_FREE_MEM_STATIC (free static memory)
The free SRAM should not be less than 15,000 bytes to ensure that data (e.g.
tool offsets) can be read in at all times.
Modifying the machine data listed in Table 11-14 results in a reconfiguration of
the SRAM with a loss of all user data. Before the change becomes effective in
the NCK, the following alarm message is generated:
S Interrupt: ”4400 MD change results in reorganization of the buffered memory
(loss of data!)”
Notice
When reconfiguring the SRAM memory, all user data are lost. To avoid data
loss, a series startup file should be created before reconfiguration (see Section
15.2, Page 15-460).
Table 11-14 Machine data required to configure the SRAM
Number Identifier Name/remarks Refer-
ence
General ($MN_ ... )
18060 INFO_FREE_MEM_STATIC Display data of the free static memory
18080 MM_TOOL_MANAGEMENT_MASK Screen form for reserving memory for the tool
management
/FBW/
18082 MM_NUM_TOOL Number of tools managed by NCK
Free memory
Reconfiguation of
the SRAM memory
Machine data
11 NCK Commissionin
with HMI Advanced
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