Siemens sinumerik 840d Programming Manual page 456

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Additional Functions

13.6 Link communication (SW 5.2 and higher)

Value ranges

The different data types have the following value

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.

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

–32768 to 32767

–2147483648 to 2147483647

–4.19e-308 to 4.19e-307

The 5th byte in the shared link memory is

assigned value 21.

SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition

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