Mode Group (Mg) - Siemens SINUMERIK 828D Function Manual

K1: Mode group, channel, program operation, reset response

9.2 Mode group (MG)

9.2 Mode group (MG)
Mode group
A mode group combines NC channels with axes and spindles to form a machining unit.
A mode group contains the channels that are required to run simultaneously in the same mode from the point of
view of the machining sequence.
The configuration of a mode group defines which channels are to be included in the group.
Note
This description assumes one mode group and one channel.
Functions that need several channels (e.g. "Axis replacement" function), are described in:
References:
Function Manual Extension functions; Mode Groups, Channels, Axis replacement (K5)
Assignment: Channel - Mode group
Axes and/or spindles are assigned to one channel.
The channel, in turn, is assigned to a mode group with the following machine data:
MD10010 $MN_ASSIGN_CHAN_TO_MODE_GROUP (channel valid in mode group)
If the same mode group is addressed in several channels, these channels together form a mode group.
Note
The control system does not recognize mode group-specific data. However, it is possible to
make some channel­specific settings that pertain to the mode group.
Channel­specific assignments
Axes can be assigned to multiple channels that, in turn, are allocated to different mode groups. The axes can
then be interchanged between these channels (axis replacement). Axis replacement functions independently of
the mode group.
Machine axes and spindles are assigned to a channel. They differ as follows:
• Geometry axes can be operated in the path grouping.
Using the master spindle, they can perform functions such as G96, G961, G331, G332, etc.
• Channel axes that are not defined as geometry axes can be moved as path axes, synchronous axes,
positioning axes, PLC axes, and command axes.
• Special axes have no geometric relationship with one another.
• Master spindle geometry axes can perform functions using the master spindle.
• Auxiliary spindles are all other spindles/axes in the channel apart from the master spindle.
The GEOAX replacement command can be programmed to declare a channel axis as a geometry axis and define
its geometry axis number. It is defined with SETMS, which spindle in the channel should be the master spindle.
480
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions