Siemens SINUMERIK 840D sl Function Manual page 501

Note
In the current ASUB, DB21, ... DBX31.4 (REPOSMODEEDGE) does not affect the final
REPOS unless this signal applies to the REPOS blocks.
In case 1, the signal is allowed only in the stopped state.
Response to RESET:
● NCK has acknowledged the PLC signal
DB21, ... DBX31.4 (REPOSMODEEDGE) == 1 AND
DB21, ... DBX319.0 (REPOSMODEEDGEACKN) == 1
If a RESET occurs in this situation, DB21, ... DBX319.1 - .3 (Repos Path Mode Ackn) is
deleted.
● NCK has not yet acknowledged the PLC signal:
DB21, ... DBX31. (REPOSMODEEDGE 4) == 1 AND
DB21, ... DBX319.0 (REPOSMODEEDGEACKN) == 0
If a RESET occurs in this situation, then:
DB21, ... DBX319.0 (REPOSMODEEDGEACKN) = 0
DB21, ... DBX319.1–319.3 (Repos Path Mode Ackn) = 0
Controlling SERUPRO approach with NC/PLC interface signals
The SERUPRO approach can be used with:
DB21, ... DBX31.4 (REPOSMODEEDGE)
and the associated signals in the following phases:
● Between "Search target found" and "Start SERUPRO ASUB"
● From "SERUPO-ASUB stops automatically before REPOS" to "Target block is executed"
While the SERUPRO ASUB is being executed, e.g. in the program section before the REPOS
operation, the interface signal does not affect the SERUPRO positioning
REPOS operations with NC/PLC interface signals
Control REPOS with NC/PLC interface signals
REPOS offsets can be positively influenced with the following channel-specific NC/PLC
interface signals from the PLC:
● DB21, ... DBX31.0-31.2 (REPOSPATHMODE0 to 2) channel-specific *
● DB21, ... DBX31.4 (REPOSMODEEDGE) channel-specific
● DB31, ... DBX10.0 (REPOSDELAY) *axis/spindle
(This axial interface does not affect machine axes that form a path.)
● DB31, ... DBX72.0 (REPOSDELAY) axis/spindle
* These signals are available in the respective DB of the HMI or PLC.
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
K1: Mode group, channel, program operation, reset response
9.8 Block search Type 5 (SERUPRO)
501