Machine data
2.3 Channel-specific machine data
Parameter Manual
180
Operating Instructions, 08/2013, 6FC5397-8EP40-0BA0
Description:
This MD defines the amount of memory space available for LUD variables.
The maximum number of available LUDs is given by one of the limit values of
MD28020 $MC_MM_NUM_LUD_NAMES_TOTAL or MD28040 $MC_MM_LUD_VALUES_MEM.
The memory defined here is subdivided into (MD28040 $MC_MM_LUD_VALUES_MEM *
1024) / MD18242 $MN_MM_MAX_SIZE_OF_LUD_VALUE blocks, and allocated to part
programs which request memory. Each part program that contains at least one
definition of an LUD variable or call parameters uses at least one such
block.
It should be remembered that several part programs requiring memory can be
open simultaneously in the NCK. The number depends on the type of program-
ming, the program length, and the size of the internal NCK block memory
upwards of (MD28060 $MC_MM_IPO_BUFFER_SIZE, MD28070
$MC_MM_NUM_BLOCKS_IN_PREP).
Related to:
MD28020 $MC_MM_NUM_LUD_NAMES_TOTAL
(number of local user variables (DRAM))
Description: Defines the number of R variables available in the channel. This machine data
reserves 8 bytes of buffered user memory per R variable.
Description: Defines the number of NC blocks available for NC block preparation. This fig-
ure is determined mainly by the system software and is used largely for opti-
mization. Approximately 10 Kbytes of dynamic memory is reserved per NC block.
Related to:
MD28060 $MC_MM_IPO_BUFFER_SIZE
(number of NC blocks with IPO buffer)
28040 MM_LUD_VALUES_MEM C02 V2,K1
- Memory space for local user variables (DRAM) DWORD PowerOn
-
- - 125, 125, 125, 125,
125, 125, 125, 125...
125, 125, 125,
125, 125, 125,
125, 125...
32000 1/1
28050 MM_NUM_R_PARAM C02 K1
- Number of channel-specific R variables (SRAM) DWORD PowerOn
-
- - 300 0 32535 1/0
28070 MM_NUM_BLOCKS_IN_PREP EXP, C02 B1,K1
- Number of blocks for block preparation (DRAM) DWORD PowerOn
-
808d-me42 - 50 50 500 0/0
808d-me62 - 80 50 500 1/1
808d-te42 - 50 50 500 0/0
808d-te62 - 50 50 500 0/0
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