Memory Configuration: Heap Memory - Siemens SINUMERIK 840D sl Function Manual

15.3.4

Memory configuration: Heap memory

Memory requirements
RESU requires compile cycles heap memory for the following function-specific buffers:
• Block buffer
The larger the block buffer (see Fig. "RESU program structure") the more part program
blocks can be traversed in reverse.
32 bytes are required per part program block.
The block buffer can be parameterized directly.
• Block search buffer
The block search buffer contains the information required for processing subroutine
searches in the context of RESU.
180 bytes are required for each subroutine. The block search buffer requires at least 2880
bytes (16 subroutine calls with 180 bytes each).
The block search buffer cannot be parameterized directly.
The size of the block search buffer is displayed via a function-specific GUD variable (for
creation of GUD variables, please refer to the Chapter 'Function-specific Display Data /
Channel-specific GUD Variables").
Figure 15-5
Memory configuration
Size of the compile cycle heap memory
The size of the heap memory in KB that can be used by the user for compile cycles is defined
via the memory configuring channel-specific machine data:
MD28105 $MC_MM_NUM_CC_HEAP_MEM
Special Functions
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Division of the heap memory for compile cycles
TE7: Continue machining - retrace support
15.3 Startup
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