Example - Siemens SINUMERIK 840D sl Function Manual

Axis replacement by PLC
If the part program of the channel is in one of the following sections at the time the axis
replacement (PLC → channel or channel → PLC) is requested by the PLC, axis replacement
will only be performed after this machining section has been exited:
● Continuous-path mode (G64/G640)
● Thread cutting/tapping (G33/G331/G332)
Block search with calculation
On a block search with calculation, only the commands GET, GETD, and RELEASE, which do
not cancel each other out, are output in the action block.

Example

Block search with calculation to target block N700:
Program code
...
N100 RELEASE(AX1)
N110 GET(AX2)
...
N400 GET(AX1)
...
N700 ...
N710 RELEASE(AX2)
...
References
Basic Functions Function Manual; Section "K1: Mode Group, Channel, Program Operation,
Reset Response" > "Block search"
6.2.15 Example
Assumptions
● Channel 1: The following axes are channel axes: 1, 2, 3, 4
● Channel 2: The following axes are channel axes: 4, 5, 6
● Default assignment: Axis 4 (AX4) is assigned to channel 1 by default
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
K5: Channel synchronization, axis interchange
Comment
; RELEASE(AX1) is collected
; GET(AX2) is collected
; GET(AX1) cancels RELEASE(AX1) =>
; RELEASE(AX1) and GET(AX1) are not saved
; Target block output: GET(AX2)
6.2 Axis replacement
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