Siemens SINUMERIK 828D Function Manual page 535

Repositioning with RMN
Like RMI, RMB and RME, RMN (REPOS Mode Next) is redefined for SUREPRO approach. After an interruption,
RMN is used not to complete an already started repositioning, but to process from the next path point:
At the time REPOSA is interpreted, position (B) is referenced in order to find point C at the interruption block with
the shortest distance to B. The repositioning block moves from B to C to the end position.
Figure 9-7 SUREPRO approach under RMN
Application and procedure
SUREPRO approach with RMN offers the oppotunity of using the application shown in the figure: If a program
abort is forced by RESET at any point when the program is advancing from block 2 to 3,
• RMN is used to approach the abort location by the shortest route in order to process just the distance to go
from C-3 and 3-4. The user starts a SERUPRO operation at the interruption block and uses the JOG keys to
move in front of the problem component of the target block.
• RMI and RMB are always approached with RMI and RMB and the target block thus repeated once completely.
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
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
K1: Mode group, channel, program operation, reset response
9.8 Block search Type 5 SERUPRO
535