Accelerated Block Search For Execution From External Source - Siemens SINUMERIK 840D Operator's Manual

4
Machine Operating Area
4.6 Automatic mode

4.6.5 Accelerated block search for execution from external source

Block
search
Search
position
4-110
Function
The block search function allows you to run the part program forward
until you reach the block you require.
In the "Search position" and "Search pointer" menus, you can use the
"External w/o calc." softkey to start an accelerated block search on
programs executed from an external device.
You can define the search destination
•
by directly positioning the cursor on the target block, or
•
by specifying a block number or a line number.
Block search sequence:
In certain circumstances, external program parts are not transferred or
are only partially transferred to the NC.
Only those programs and program parts which are needed in order to
reach the specified search target and to continue program execution
are transferred to the NC. This applies to the following:
•
"Execution from external source" function
•
Execution of EXTCALL instructions.
Notice
Since certain program parts may not have been transferred to the NC,
it must be assumed that modal functions such as feed and motion
commands are incorrect at the target block (main block).
Consequently, when using the variants "Without calculation" and
"External – without calculation", you will either need to make sure that
any information required for machining is available in the selected
target block (main block) and following blocks, or use the override to
complete the necessary settings.
Operating sequence
"Auto" is selected in the "Machine" operating area.
The channel is in the reset state.
The program in which the block search is to be performed is selected.
Switch to the "Search position" dialog.
Define search destination in program editor:
The current selected program level is displayed.
The block search via "Search position" is only possible for programs
which have been loaded onto the NC and not for programs executed
from the hard disk.
SINUMERIK 840D/810D Operator's Guide HMI Embedded (BEM) – 03.04 Edition
4
03.04
 Siemens AG, 2004. All rights reserved