Siemens SINUMERIK 802D sl Function Manual page 195

Selection/activation
The block search is selected in AUTOMATIC mode on the user interface.
The search run can be activated with corresponding softkey for the following functions:
● Block search with calculation to contour
● Block search with calculation to block end point
● Block search without calculation.
Interface signal
In the PLC, the following interface signals are set according to a time sequence (see figure):
● "Block search active" (V3300 0001.4)
● "Action block active" (V3300 0001.3)
● "Approach block active" (V3300 0000.4)
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0
Is used in any circumstances in order to approach the contour. On NC Start, the start
position of the target block or the end position of the block before the target block is
approached. This is traversed up to the end position. Processing is true to contour.
Is used in any circumstances in order to approach a target position (e.g. tool change
position). The end position of the target block or the next programmed position is
approached using the type of interpolation valid in the target block. This is not true to
contour. Only the axes programmed in the target block are moved.
Is used for a quick search in the main program. No calculations are performed. The
internal controller values indicate the status valid before the search. Whether the program
can be executed subsequently depends on the program and must be decided by the
operator. This search run is suitable for a fast syntax check of a new program.
Note
The "Approach block active" is only enabled with "Block search with calculation on
contour" because a separate approach block is not generated with "Block search with
calculation at block end point" (the approach block is the same as the target block).
Operating Modes, Program Operation (K1)
10.4 Program test
195