B3: Distributed systems - 840D sl only
2.2 NCU link
Extended Functions
118 Function Manual, 03/2013, 6FC5397-1BP40-3BA1
2.2.5 Lead link axes
2.2.5.1 General information
If, for an axis coupling, the the machine axes of the leading and following axes are not
connected to the same NCU, the coupling must be established using a link axis of the NCU
of the following axis. In this case, the link axis is designated as lead-link axis.
The setpoints of the master axis are transferred synchronously in the interpolator cycle via
the NCU link to the lead-link axis. Similarly, in the opposite direction, the actual values and
the status data of the lead-link and the following axis are transferred to the leading axis.
The lead-link axis is parameterized as local leading axis of the following axis.
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Figure 2-20 Lead-link axis
Coupled axes
Lead link axes can be used in conjunction with following axis couplings:
● Master value coupling
● Coupled motion
● Tangential tracking
● Electronic gear (ELG)
● Synchronous spindle
Requirement
The NCU must communicate via the NCU link. See Section "Link communication (Page 79)"
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