Siemens SINUMERIK 880 SW 6 Planning Manual page 196

6 NC Channel/PLC Interface (DB 10 ... DB 25)
6.4.4 Program modification
NC STOP
0/1 transition: The current NC program is stopped immediately, the current block is not
concluded. Residual paths are not traversed until the next start. The axes are
brought to a standstill under control.
1/0 transition: No effect.
1
2
3
4
5
Signal chart
1: NC STOP signal
2: NC START signal
3: PROGRAM RUNNING signal
4: Axis running
5: Block executed
Notes:
• If the NC program has been interrupted, additional auxiliary functions can be stored, for
example. These will be executed after the next NC START.
• When the NC START signal is given, program execution recommences at the breakpoint.
If additional auxiliary functions were stored while the program was interrupted, only these
will be effective after the first Start. Program execution is then continued with the second
NC Start.
• The NC STOP signal must be active for at least one PLC cycle.
• If data were transferred to the NC after NC STOP (e. g. temperature compensation, tool
offset), these are taken into account immediately after NC START.
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6 16 ©
Siemens AG 1991 All Rights Reserved
05.91
DW 2, bit 1
6ZB5 410-0HE02
SINUMERIK 880 (PJ)