Programming Via Nc Part Program; Programming Via Plc; Programming Via Input Display; Default Settings Via Machine Data - Siemens SINUMERIK 840C Installation Instructions Manual

10.94
A gearbox chain must not be closed in the active state, i.e. if a chain is defined such that a
following drive at the end is also acting as the leading drive at the start of the chain, then it
is strictly illegal for all links to be active at the same time. The user must take measures
via the PLC, e.g. INTERLOCK LINK ON to ensure that this situation does not arise.
No system monitoring function is provided.
Note:
This function is replaced by the "Variable cascading" function with SW 4 and higher. If a
gearbox chain is incorrectly defined, the error message "NC timeout" is output.

12.18.12.1 Programming via NC part program

Function
Define/erase configuration
Switch link on/off
Switch on link with on-the-fly
synchronization
Switch off link
Axis synchronization
Please refer to the documentation entitled "NC Programming Guide" for further information.

12.18.12.2 Programming via PLC

The gearbox interpolation groupings can be influenced and checked via the interface signals of
DB29(following axes) and DB31(following spindle). ON and OFF commands for the gearbox
link can also be issued via the PLC. However, the PLC cannot be used to change a gearbox
link configuration.

12.18.12.3 Programming via input display

Please refer to the documentation entitled "Operator's Guide" for further information.

12.18.12.4 Default settings via machine data

Machine data can be used to set defaults for the link structures and to disable reconfiguration
and link factor switchover. These functions are particularly important for machines with forced-
linked drives (e.g. gantry or portal machines).
• NC MD 1456*/495*
• NC MD 1844*/525* bit0
• NC MD 1844*/525* bit1
• NC MD 1844*/525* bit2
• NC MD 1844*/525* bit3
© Siemens AG 1992 All Rights Reserved
SINUMERIK 840C (IA)
Default setting for link structure
Axis/spindle may be following axis/spindle
Reconfiguration permissible
Switchover of link factor permissible
Overwriting of synchronous position permissible
6FC5197- AA50
12 Functional Descriptions
12.18.12 Programming
G function
G401
G402
G403
G400
G200
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