13
Additional Functions 12.98
13.6 Link communication
SW 5.2 and hi
her
13
840D
NCU 571
840D
NCU 572
NCU 573
FM-NC 810D 840Di
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13-456
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
Value ranges
The different data types have the following value
ranges:
BYTE: 0 to 255
WORD: –32768 to 32767
DWORD: –2147483648 to 2147483647
REAL: –4.19e-308 to 4.19e-307
The various NCU applications sharing access to the
link memory
at the same time
must use the link
memory in a
uniform manner
. When the process is
completely separate in time, the link memory can be
occupied differently.
Caution
A link variable write process is only then completed
when the written information is also available to all
the other NCUs. Approximately two interpolation
cycles are necessary for this process. Local writing
to the link memory is delayed by the same time for
purposes of consistency.
For more information, please refer to the Description
of Functions B3 (SW 5)
Programming example
$A_DLB[5]=21
The 5th byte in the shared link memory is
assigned value 21.
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