A2: Various NC/PLC interface signals and functions
1.2 NC/PLC interface signals
Basic Functions
38 Function Manual, 09/2011, 6FC5397-0BP40-2BA0
1.2.2 Ready signal to PLC
DB10 DBX104.7 (NC CPU Ready)
The NC CPU is ready and registers itself cyclically with the PLC.
DB10 DBX108.3 (HMI Ready)
SINUMERIK Operate is ready and registers itself cyclically with the NC.
DB10 DBX108.5 (drives in cyclic operation)
Precondition: For all machine axes of the NC, the corresponding drives are in the cyclic operation, i.e. they
cyclically exchange PROFIdrive telegrams with the NC.
DB10 DBX108.6 (drives ready)
Precondition: For all machine axes of the NC, the corresponding drives are ready:
DB31, ... DBX93.5 == 1 (Drive Ready)
DB10 DBX108.7 (NC Ready)
The NC is ready.
1.2.3 Status signals to PLC
DB10 DBX103.0 (remote diagnosis active)
The HMI component reports to the PLC that the remote diagnostics (option) is active i.e. the control is done via
an external PC.
DB10 DBX109.6 (ambient temperature alarm)
The ambient temperature or fan monitoring function has responded.
DB10 DBX109.7 (NCK battery alarm)
The battery voltage has dropped below the lower limit value. The control can still be operated. A control system
shutdown or failure of the supply voltage will lead to loss of data.
DB10 DBX109.0 (NCK alarm pending)
The NC signals that at least one NC alarm is pending. The channelspecific interface can be scanned to see
which channels are involved and whether this will cause a processing stop.
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