Siemens SINUMERIK 840D sl Programming Manual page 136

Flexible NC programming
1.15 Axis replacement, spindle replacement (RELEASE, GET, GETD)
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.
Automatic "GET"
If an axis is in principle available in a channel but is not currently defined as a "channel axis",
GET is executed automatically. If the axis/axes is/are already synchronized no preprocess
stop is generated.
Varying the axis replacement behavior
The transfer point of axes can be set as follows using machine data:
● Automatic axis replacement between two channels then also takes place when the axis
● When requesting an axis container rotation, all axes of the axis container which can be
● When an intermediate block is inserted in the main run, a check will be made to
● Instead of a GET block with preprocessing stop and synchronization between
For more information about how axis or spindle replacement works, see
Function Manual, Extended Functions, Mode Groups, Channels, Axis Replacement (K5).
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has been brought to a neutral state by WAITP (response as before)
assigned to the executing channel are brought into the channel using implicit GET or
GETD. A subsequent axle replacement is only permitted again once the axis container
rotation has been completed.
determine whether or not reorganization is required. Reorganization is only necessary if
the axis states of this block do not match the current axis states.
preprocessing and main run, axes can be replaced without a preprocessing stop. In this
case, an intermediate block is simply generated with the GET request. In the main run,
when this block is executed, the system checks whether the states of the axes in the
block match the current axis states.
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
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