Siemens SINUMERIK 840D sl Function Manual page 604

Detailed description
2.5 Block search
2.5.5 Examples of block search with calculation
Selection
From the following examples, select the type of block search that corresponds to your task.
Type 4 block search with calculation at block end point
Example with automatic tool change after block search with active tool management:
1. Set machine data:
2. Select ASUB "BLOCK_SEARCH_END" from PLC via FB4.
3. Load and select part program "WORKPIECE_1".
4. Search to block end point, block number N220.
5. HMI signals "Search target found".
6. NC Start for output of action blocks.
7. With the PLC signal:
8. After the end of the ASUB (can be evaluated, e.g., via M function M90 to be defined, see
example for block N1110), the PLC sets signal:
DB21, ... DBX1.6 (PLC action ended).
Alternatively, the VDI interface signal:
DB21-DB30 DBB318 Bit 0 (ASUB is stopped)
can also be scanned.
As a result, Alarm 10208 is displayed, i.e., other actions can now be performed by the
operator.
9. Manual operator actions (JOG, JOGREPOS, overstoring)
10. Continue part program with NC Start.
46
MD11450 $MN_ SEARCH_RUN_MODE to 1
MD11602 $MN_ASUP_START_MASK Bit 0 = 1 (ASUB Start from stopped state)
Reference:
/FB1/ Function Manual, Basic Functions, Basic PLC Program (P3)
DB21... DB32.6 (last action block active)
the PLC starts ASUB "BLOCK_SEARCH_END" via FC9.
References:
/FB1/ Function Manual, Basic Function, Basic PLC Program (P3)
Basic logic functions: Mode group, channel, program operation, reset response (K1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0