Siemens SINUMERIK 828D Programming Manual page 444

Other information
15.1 Axes
NCUs that are dependent on the leading link axis can utilize the following coupling
relationships with it:
● Master value (setpoint, actual master value, simulated master value)
● Coupled motion
● Tangential correction
● Electronic gear (ELG)
● Synchronous spindle
Programming
Master NCU:
Only the NCU, which is physically assigned to the master value axis can program travel
motions for this axis. The travel program must not contain any special functions or
operations.
NCUs of slave axes:
The travel program on the NCUs of the slave axes must not contain any travel commands for
the leading link axis (master value axis). Any violation of this rule triggers an alarm.
The leading link axis is addressed in the usual way via channel axis identifiers. The states of
the leading link axis can be accessed by means of selected system variables.
Further information
Conditions
● The dependent NCUs, i.e., NCU1 to NCU<n> (n equals max. of 8), must be
● The axis must be configured appropriately via machine data.
● The "Link axis" option must be installed.
● The same interpolation cycle must be configured for all NCUs connected to the leading
Restrictions
● A master axis which is a leading link axis cannot be a link axis, i.e. it cannot be traversed
● A master axis which is a leading link axis cannot be a container axis, i.e. it cannot be
● A leading link axis cannot be the programmed leading axis in a gantry grouping.
● Couplings with leading link axes cannot be cascaded.
● Axis replacement can only be implemented within the home NCU of the leading link axis.
444
interconnected via the link module for high-speed communication.
References:
Configuration Manual, NCU
link axis.
by NCUs other than its home NCU.
addressed alternately by different NCUs.
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
Fundamentals