Start PI Services in the NCK
area
Address Signal Values
Result DB1200.DBB5000.0 Job completed 1
DB1200.DBX5000.1 Error in job 0
DB410x.DBX0.0 delivers an order to relocate the tool from the buffer. The target location in
magazine 1 is in
DB4100.DBW12. With it, the PLC user program can execute the necessary
sequence.
9.7.8 Example: Repeat "Prepare tool change" order
Sequence: Repeat the job
For a milling machine with toolboy and shifter, the asynchronous transfer message and job
can cross:
● The toolboy was acknowledged to the tool management as the target position for the old
tool with the end acknowledgment.
● The part program is continued with the new tool and after a very short time needs the
previous (old) tool once more.
● The tool management generates the next preparation job for the tool change with the
toolboy as the source position for what will then be the new tool.
● At the same time the PLC user program transferred the tool from the toolboy to the shifter.
● The PLC user program communicates the tool movement from the toolboy to the shifter
asynchronously and starts onward transport to the magazine.
● In the next cycle the PLC user program recognizes the new job to relocate the tool from
the toolboy to the spindle.
There is no longer any tool in the toolboy. The PLC user program must detect such a condition
(monitoring: does toolboy or shifter contain a tool?). It can now cancel the return of the tool
into the magazine. A repeat job (Status 7) can then be requested from the tool management:
● Meanwhile, the tool management has received the message that the tool is in the shifter.
● The tool management generates a new preparation job with the source position shifter for
the new tool.
Note
The acknowledgment to repeat the job "Prepare tool change" may only be issued before
the end acknowledgment of the "Prepare tool change" job!
Acknowledgment to tool management:
Acknowledgment
step
Acknowledgment bit Transfer step new
tool
Transfer step old
tool
Status
xxx DB4000.DBXx.x
0 0 7
Tool management
9.7 Application example for turning machine
CNC commissioning
Commissioning Manual, 10/2015, 6FC5397-3DP40-5BA3 315
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