Parameter Assignment: Response To Faults - Siemens SINUMERIK 840D Function Manual

G1: Gantry axes

9.5 Parameter assignment: Response to faults

Special cases
If individual axes have to be activated, the gantry groups must be temporarily canceled. As the
second axis no longer travels in synchronism with the first axis, the activated axis must not be
allowed to traverse beyond the positional tolerance.
If the gantry grouping is canceled, the following points must be noted:
● Always activate the traversing range limits and set them to the lowest possible values
(position tolerance).
● Synchronize the gantry grouping first if possible and then execute a POWER-ON-
RESET without referencing the axes again. This ensures that the traversing range limits
always refer to the same position (i.e. that which was valid on power ON).
● Avoid using the step-change function. Position step changes are only permissible if they
stay within the permitted tolerance.
● Always use an offset of 0 for the function generator and measuring function in contrast to the
recommendations for normal axes.
● Set the amplitudes for function generator and measuring function to such low values that the
activated axis traverses a shorter distance than the position tolerance allows. Always
activate the traversing range limits as a check (see above).
Further information
Function Manual Drive Functions SINAMICS S120; Speed control loop (DD2)
Start-up support for gantry groupings
The start-up functions of the function generator and measuring are parameterized via the PI
service. The traversing movement starts for all parameterized axes with NC start in JOG mode.
A window is displayed in the "Measuring function and function generator in gantry grouping"
user interface. Two amplitude values, each with an offset and bandwidth, must be entered in
this window. The first amplitude value applies to the measuring axis and the second to the other
coupled axes.
See also
G2: Velocities, setpoint / actual value systems, closed-loop control (Page 31)
9.5 Parameter assignment: Response to faults
Pulse suppression
The behavior of the gantry grouping with regard to faults that trigger pulse suppression can be
set with the following axis-specific machine data:
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Axes and spindles
Function Manual, 06/2019, A5E47437747B AA