Siemens SINUMERIK 840D sl Function Manual page 458

K1: Mode group, channel, program operation, reset response
9.2 Mode group
A mode group is essentially characterized by the fact that all channels assigned to it are any
instant are always in the same mode (AUTOMATIC, JOG, MDI).
Note
This description continues on the assumption that there is 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)
Parameter assignment
A channel is assigned to a mode group in the machine data:
MD10010 $MN_ASSIGN_CHAN_TO_MODE_GROUP[<channel index>] = mode group
number
All channels with the same mode group number form one mode group.
Note
A NC always comprises one mode group with one channel by default. It is not possible to
parameterize an NC without a channel.
Mode-group-specific NC/PLC interface signals
The mode-group-specific NC/PLC interface signals are in data block DB11.
458
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions