Siemens SINUMERIK Commissioning Manual page 128

Programming PLC Functions
4.5 Starting a block search across several channels
4.5 Starting a block search across several channels
Function
For this block search, the NCK is operated in the program test mode, so that interactions
between channel and synchronous actions and between multiple channels are possible
within an NCK.
During the "Block search in the program test mode" the NCK outputs all help (auxiliary)
functions to the PLC and the part program commands to coordinate the channels (WAITE,
WAITM, WAITMC, axis exchange, writing to variables) are executed by the NCK; this means
that during this block search, the PLC is brought up-to-date and processing sequences - that
comprise the interaction of several channels - are correctly executed within the scope of this
block search.
Activating the block search
The function is activated by the "Prog. test contour" softkey. The NCK then starts the block
search and switches the selected program in the current channel to "program test" mode:
● The auxiliary functions of the part program are output from the NCK to the PLC.
● No axis movements are executed.
If during the block search the NC finds one of the part program commands WAITE, WAITC
or WAITMC, the NCK waits for the specified partner channels, irrespective of the current
mode of these partner channels (e.g. normal program execution, program test, search via
program test, etc.).
When the NC reaches the specified target block in the current channel, the NC stops the
block search and deselects "program test" mode; the auxiliary functions of the target block
are no longer output.
A dialog message is output, which must be acknowledged as soon as all the channels
involved in the current search have exited "program test" mode.
The message indicates that, depending on the particular part program, REPOS offsets may
have been produced during the search operation in the channels involved in the block
search and will be retracted by the NC through interpolation the next time it starts. Any
REPOS offsets can be approached manually one by one in JOG mode, before program
execution is continued at the point in the program reached by the block search by pressing
the "NC Start" key.
Block search configurations
Block search in "program test" mode supports the following configurations:
1. Block search in the currently selected channel (the currently selected channel is the
2. Block search in the currently selected channel and in all channels in which the same
3. Block search in the currently selected channel and in all channels that are in the same
4. Block search in all channels of the NCK
122
channel selected by the HMI).
workpiece is selected as in the current channel.
mode group as the current channel.
Commissioning Manual, 03/2009, 6FC5397-0DP10-3BA0
HMI Advanced (IM4)