Siemens SINUMERIK 840D sl Function Manual page 81

B3: Several operator panels connected to several NCUs, distributed systems - only 840D sl
M: N
Assignment of several control units (M) to several NCUs (N):
● Bus addresses, bus type
● Properties of the control units:
● Dynamic switchover from PCUs/MCPs or HT6s to other NCUs
Actions are required for the use of M:N during:
● Hardware configuration
● File parameterization
● Design of the PLC program
● Operation
For applications/configurations matching the examples described, the notation examples can
be copied directly or modified slightly. The aspects file parameterization, PLC programming
and operation are described as an aid to quick commissioning in each case.
NCU link
The functions for the NCU link are based on additional communication between NCUs in the
interpolation cycle.
The NCU link allows:
● Subordination of a physical axis to several different NCUs
● Cross-NCU interpolation
● An increase in the number of usable axes for an NCU grouping
● An increase in the number of channels for an NCU grouping
● Provision of axis data and signals on the NCU to which a non-local axis is temporarily
● User communication via the NCU grouping by means of link variables
Lead link axes
Following axes can be traversed by an NCU if the associated leading axis is being traversed
by another NCU. The NCU link communication handles the necessary exchange of axis
data.
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
– Main control panel/secondary control panel
Reference:
Guidelines for Machine Configuration
Reference:
Function Manual Basic Functions; PLC Basic Program (P3)
Reference:
Operating Manual
assigned
2.1 Brief description
81