Siemens SINUMERIK 840D sl Function Manual page 262

K9: Collision avoidance - only 840D sl
7.1 Function description
Tool changes
The collision avoidance only updates the active machine model after a tool change without an
explicit request by PROTA if a tool offset is selected (output of the programmed tool offset
number Dx at the NC/PLC interface).
However, at the control, tool changes can be made, which are not associated with a tool offset
selection. However, for these changes the active machine model is not updated. These types
of tool changes include, for example:
● Loading/unloading a tool at the user interface.
SINUMERIK Operate: Operating area "Parameter" > "Tool list" > Vertical softkey: "Loading"
or "Unloading"
● Carrying out a tool change via the PLC user program
● Directly writing to the tool buffer memory using the system variable $TC_MPP6[9998,
<location>]
● SETMS(<spindle number>): Changing the master spindle in the channel
● TMMVTL: PI service "Prepare magazine location for loading, unload tool"
Reference Function Manual Basic Functions; Chapter: "P3: Basic PLC program for
SINUMERIK 840D sl" > "Component descriptions" > "PI services" > "PI service: TMMVTL"
● MVTOOL: Command to move a tool
Reference Function Manual Tool Management; Chapter "Programming > "NC language
commands" > "MVTOOL - language command to move a tool"
If such a change is carried out, then the machine manufacturer must be requested to update
the machine module via the PLC user program. Examples of options include:
● A new channel reset is requested if the channel is in the "reset" state. When the reset
response is appropriately set (MD20110 $MC_RESET_MODE_MASK), then the actual tool
offset number Dxis output again.
● Starting an ASUB or manufacturer's cycle, which includes the output of the tool offset
number Dx and the request to update the machine model (PROTA).
Tool wear
Minimal tool changes do not have to be taken into account in the machine model, as generally
they are far less than the collision clearance.
If a tool change occurs, which is relevant for collision avoidance, e.g. diameter changes for
grinding tools, then these must be taken into account by explicitly requesting that the machine
model is updated (PROTA).
No change to the machine model
The active machine model does not change if a fully modeled machine part with tools, e.g. a
tool magazine, is moved in the machine.
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Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Special functions