Siemens SINUMERIK 840Di Function Manual page 563

Block search
active (DB21, ...
DBX33.4)
Action block
active (DB21, ...
DBX32.3)
Last action block
active (DB21, ...
DBX32.6)
Channel status
Reset (DB21, ...
DBX35.7)
Channel status
interrupted
(DB21, ... DBX35.6)
Fig. 2-2
Interface signals
In the PLC, the following interface signals are set according to the time sequence shown in
the figure:
DB21, ... DBX33.4 (block search active)
DB21, ... DBX32.3 (action block active)
DB21, ... DBX32.4 (approach block active)
DB21, ... DBX32.6 (last action block active)
DB21, ... DBX1.6 (PLC action complete)
Continuation mode after block search
Following the block search, the program can be resumed via interface signal:
DB21, ... DBX7.1 (NC Start).
If an axis is first programmed after "Block search with calculation at block end point", the
incremental value can be added to the value accumulated up to the search target using
setting data
SD42444 $SC_TARGET_BLOCK_INCR_PROG.
Mode Group, Channel, Program Operation, Reset Response (K1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Block search Search target 1
starting found
Time sequence of interface signals
Block search Search target 2
starting found
Detailed Description
2.5 Block search
Last
NC Start
action block
action blocks
being output
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