Siemens SINUMERIK 840C - Manual (Page 188)

09.95 6 NC Machine Data (NC MD), NC Setting Data (NC SD)
6.1.3 Configuring information
6.1.3 Configuring information
Two 1) mode groups and four 1) channels can be implemented on the SINUMERIK 840C. The
channels are allocated to the mode groups via machine data, i.e. the channels are subordinate
to the mode groups. The available axes are also allocated to the mode groups via machine
data.
Basically, each channel is comparable to a separate machine. Each channel can execute its
own program under PLC control. All channels allocated to one and the same mode group must
all be operated in the same mode, while channels assigned to different mode groups via
machine data can be operated in different modes simultaneously. However, a channel can only
be assigned to one mode group.
The axes are allocated to the channels in the part program rather than via machine data. This
means that an axis can operate in different channels within a mode group, but not
simultaneously.
In order to prevent collisions based on programming errors, it is possible to prohibit operation
of a particular axis in a specific channel (NC machine data). The operator can select the
various mode groups and channels via the operator panel keyboard. Each mode group must
be assigned at least one channel and one axis. Mode groups without spindles are allowed.
Gaps in the channels are not allowed.
A channel can traverse only the axes in the mode group assigned to it. An axis can be
traversed only in its assigned mode group. The warm restart function can be used to modify
the configuration (mode group assignments) without having to reapproach the reference points
(for a detailed description of the warm restart function, refer to Section Functional
Descriptions).
DB10-13
DL 3
NC part
program
DB31
DL k + 2
NC MD 104*
NC
configuration
NC MD 360*
NC MD 453*
Spindle 1 to 6
Channel 1 to 4 1)
TO area 1 to 4
Axis 1 to 30
Mode group 1 to 2 1)
NC MD 200*
NC MD 384*
Meas. circuit 1 to 15
NC MD 400*
NC MD 460*
Note:
Up to SW 4: The limitation to max. 15 real axes or spindles (axes/spindles with servo
loops) for analog drives still applies.
SW 5 and higher: Up to 30 servo loops can be defined (611D).
Example: 30 axes or 24 axes plus 6 spindles/C axes
No fictitious axes can be defined in addition to the 30 "Axes".
_______
1) As from SW 4: 6 channels, 6 mode groups
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50 6–3
SINUMERIK 840C (IA)