Siemens SINUMERIK 828D Function Manual page 580

K1: Mode group, channel, program operation, reset response
9.9 Program operation mode
Figure 9-10 Signal chart during activation through operator panel reset
Note
DB21, ... DBX35.4 ("Program status aborted") and DB21, ... DBX35.7 ("Channel status
reset") are only received if event-driven use program is complete. Between program end and
the start of the event-driven application program these states are not imported. This is also
the case between an operator panel reset and the start of the application program.
Display
The information about the triggering event is provided to the PLC via the NC/PLC interface byte DB21, ...
DBB376.
Bit Value Description
0 1 Part program start from the channel status reset
1 1 Part program end
2 1 Operator panel reset
3 1 Ramp-Up
4 1 1. Start after block search (see "Automatic start of an ASUB after a block search
[Page 510]")
The global query of DB21, ... DBB376 on 0 enables the determination, whether an event-driven application
program is active at all.
If the event-driven application program has expired or has been interrupted with RESET, then the related display
bit is deleted in the interface. For a very brief program, the corresponding bit remains for at least the duration of a
complete PLC cycle.
580
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions