Siemens SINUMERIK 840D sl Function Manual page 548

K1: Mode group, channel, program operation, reset response
9.9 Program operation
Figure 9-8 Signal sequence when activated by a channel reset
Interface signals DB21, ... DBX35.4 (program state interrupted) and DB21, ... DBX35.7
(channel state reset)
● The interface signals are only set if the activated, event-driven user program has already
been exited.
● The interface signals are not set between:
– end of program and the start of the event-driven user program
– Channel reset and the start of the event-driven user program
NC/PLC interface signals Initiating event
The initiating event is displayed using interface signals DB21, ... DBX376.0 ... 4:
Bit
0
1
2
3
4
If the event-driven user program is exited, or canceled with a reset, then the interface signals
are again deleted.
The interface signals are available as a minimum for the duration of a complete PLC cycle.
548
Value Event
1 Program start from channel state "Reset"
1 End of program
1 Channel reset
1 Powering-up of the NC
1 1. Program start after block search (see "Automatic Start of an ASUB after block
search (Page 485)")
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions