Link Grouping System Of Units - Siemens SINUMERIK 840D sl Function Manual

B3: Several operator panels connected to several NCUs, distributed systems - only 840D sl

2.13 Link grouping system of units

2.13 Link grouping system of units
2.13
Introduction
Cross-NCU interpolations are possible in the link grouping with:
● Link axes (see "Link axes")
● Lead link axes (see "Lead link axes")
● Link axes on NCUs with different interpolation cycles (see "NCU link with different
With all constellations, it is only possible to achieve a correct result if all the NCUs connected
via the NCU link are using the same system of units.
Link grouping, global setting
To ensure consistency across the configuration, the operator input switchover of system of
units (metric/inch) on the operator panel of one NCU affects the entire NCU grouping with
software version 5 and higher.
If the conditions:
● MD10260 $MN_CONVERT_SCALING_SYSTEM=1.
● Bit 0 of machine data:
● All channels in the reset state
● Axes are not being traversed via JOG, DRF or the PLC
● Constant grinding wheel peripheral speed (GWPS) is not active
are met on all connected NCUs, the switchover is valid for all NCUs. If one of the switchover
conditions for the system of units is not fulfilled on one or more NCUs, none of the NCUs will
switch to the other unit system.
Actions such as part program start or mode change are disabled for the duration of the
switchover.
Different systems of units
It is only possible to use different unit systems in time intervals where there are no cross-
NCU interpolations even though the link grouping is installed. The required settings as
described in
References: /FB1/ Function Manual, Basic Functions; Velocities, Setpoint/Actual Value
Systems, Control Loop Control (G2)
must be performed NCU-specifically by means of G codes.
196
interpolation cycles")
MD20110 $MC_RESET_MODE_MASK
set in every channel
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions