Link Communication (Sw 5.2 And Higher) - Siemens sinumerik 840d Programming Manual
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Additional Functions
13
13.6 Link communication (SW 5.2 and higher)
840D
840D
NCU 571
NCU 572
NCU 573
• and dependent on EU synchronization monitoring (if e.g. Y is
defined as EU following axis and the maximum permissible
synchronization difference is to be 100 µm):
IDS=03 WHENEVER ABS($VA_EG_SYNCDIFF[Y])>0.1
13.6 Link communication (SW 5.2 and higher)
Function
The NCU link, which connects several NCU units
from an installation, is used in configurations with a
distributed system design. When there is a high
demand for axes and channels, e.g. with revolving
machines and multi-spindle machines, computing
capacity, configuration options and memory areas
can reach their limits when only one NCU is used.
Several networked NCUs connected by means of an
NCU link module represent an open, scalable
solution that meets all the requirements of this type
of machine tool. The NCU link module (hardware)
provides high-speed NCU-to-NCU communication.
Options providing this functionality can be ordered
separately.
Function
Several NCUs linked via link modules can have read
and write access to a global NCU memory area via
the system variables described in the following.
• Each NCU linked via a link module can use
global link variables. These link variables are
addressed in the same way by all connected
NCUs.
• Link variables can be programmed as system
variables.
As a rule, the machine manufacturer defines and
documents the meaning of these variables.
• Applications for link variables:
– Global machine states
– Workpiece clamping open/closed
– Etc.
13-454
FM-NC
810D
840Di
DO $AN_ESR_TRIGGER=1
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
12.98
13
Siemens AG 2000. All rights reserved
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