Siemens SINUMERIK 840D sl Function Manual page 629

Selecting REPOS mode
With the channel-specific VDI signal (PLC→NCK)
DB21, ... DBX31.0-31.2 (REPOSPATHMODE0-2) the concerned function RMB, RMI, RME or
RMN can be selected with the 3 bits.
Repositioning point
RMNOTDEF REPOS Mode is not redefined
RMB Repositioning of block start point or last end point
RMI Repositioning interruption point
RME Repositioning end-of-block point
RMN Repositioning to next path point
DB21, ... DBX31.0-31.2 (REPOSPATHMODE)=0 corresponds to RMNOTDEF
DB21, ... DBX31.0-31.2 (REPOSPATHMODE)=1 corresponds to RMB
DB21, ... DBX31.0-31.2 (REPOSPATHMODE)=2 corresponds to RMI
DB21, ... DBX31.0-31.2 (REPOSPATHMODE)=3 corresponds to RME
DB21, ... DBX31.0-31.2 (REPOSPATHMODE)=4 corresponds to RMN
With DB21, ... DBX31.0-31.2 (REPOSPATHMODE0 to 2) = 0, no settings are overwritten
and the current program is valid. The interface signal responds to the level of the
corresponding mode.
Note
RMN is a general REPOS extension and it is not restricted to SERUPRO. For SERUPRO RMI
and RMB are identical.
With DB21, ... DBX31.0–31.2 (REPOSPATHMODE0 to 2), the path as a whole is controlled.
The path axes cannot be changed individually.
The behavior of the other axis types can be changed individually using interface signal
DB31, ... DBX10.0 (REPOSDELAY). This REPOS offset is not applied immediately, but only
when it is next programmed.
For further information on the programming of repositioning point, please refer to
References:
/PGA/ Job Planning Programming Manual; "Path Behavior" repositioning on Contour
Read REPOS mode in synchronized actions
The valid REPOS mode of the interrupted block can be read via synchronized actions using
system variable $AC_REPOS_PATH_MODE=
0: not defined
1: RMB
2: RMI
3: RME
4: RMN
Basic logic functions: Mode group, channel, program operation, reset response (K1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Repositioning not defined
Repositioning to beginning
Repositioning to point of interruption
Repositioning to block end point
Repositioning to next geometric path point of interrupted block
Detailed description
2.6 Block search Type 5 SERUPRO
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