Gear Stage Change - Siemens SINUMERIK 840D sl Function Manual

Autonomous axis operations
Autonomous single-axis operations are axes controlled by the PLC that can also be simulated
on SERUPRO. During SERUPRO operation, as in normal operation, the PLC can take over
or give up control of an axis. If required, this axis can also be traversed using FC18. The PLC
takes over control of the axis before the approach block and is responsible for positioning this
axis. This is valid for all block search types.
For further information about autonomous single-axis operations, see:
References:
Function Manual, Extended Functions; Positioning Axes (P2)
Axis replacement
Problem: A program moves an axis and gives up control before the target block with WAITP(X).
X is thus not subject to REPOS and the axis is not taken into account in SERUPRO approach.
Via the machine data MD11470 $MN_REPOS_MODE_MASK, the following behavior can be
achieved for SERUPRO-REPOS:
The neutral axes are moved as "command axes" in the SERUPRO-REPOS. The axis
interpolates without a path context even if it was last programmed as a path axis. In this
scenario, the velocity results from MD32060 $MA_POS_AX_VELO. After SERUPRO
approach, this axis is again neutral.
Neutral axes that are however not allowed to be repositioned must receive the axial NC/PLC
interface signal "REPOSDELAY". This deletes the REPOS movement.
Example:
After SERUPRO, one axis is deliberately moved in the synchronized action via technology
cycles. The command axes are always moved in the approach block, never in the target block.
The target block can only be changed if all command axes have been moved to the end.
The PLC-controlled axis is not repositioned
Axes enabled by RELEASE(X) before the target block are not repositioned.
9.8.8.8

Gear stage change

Operational sequences
The gear stage change (GSC) requires physical motions from the NCK in order to be able to
engage a new gear.
In the SERUPRO operation, no gear stage change is required and is carried out as follows:
Some gears can only be changed when controlled by the NC, since either the axis must
oscillate or a certain position must be approached beforehand.
The gear stage change can be suppressed selectively for DryRun, program test, and
SERUPRO using bits 0 to 2 in MD35035 $MA_SPIND_FUNCTION_MASK.
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
CAUTION
K1: Mode group, channel, program operation, reset response
9.8 Block search Type 5 (SERUPRO)
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