Siemens SINUMERIK 840D sl Programming Manual page 142

Flexible NC programming
1.15 Axis replacement, spindle replacement (RELEASE, GET, GETD)
Requirements
Preconditions for axis replacement
● The axis must be defined in all channels that use the axis in the machine data.
● It is necessary to define to which channel the axis will be assigned after POWER ON in
Description
Release axis: RELEASE
When enabling the axis please note:
1. The axis must not be involved in a transformation.
2. All the axes involved in an axis link (tangential control) must be enabled.
3. A concurrent positioning axis cannot be replaced in this situation.
4. All the following axes of a gantry master axis are transferred with the master.
5. With coupled axes (coupled motion, master value coupling, electronic gear) only the
Accept axis: GET
The actual axis replacement is performed with this command. The channel for which the
command is programmed takes full responsibility for the axis.
Effects of GET:
Axis replacement with synchronization:
An axis always has to be synchronized if it has been assigned to another channel or the PLC
in the meantime and has not been resynchronized with "WAITP", G74 or delete distance-to-
go before GET.
● A preprocess stop follows (as for STOPRE).
● Execution is interrupted until the replacement has been completed.
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the axis-specific machine data.
leading axis of the group can be enabled.
Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
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