NC Commissioning with HMI Advanced
11.11 NC/PLC Diagnosis
Manual
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
489
Table 11-58 PLC operating state display by means of RUN/STOP evaluation
RUN
STOP
PLC operating state
On
off
RUN: The PLC program is being processed.
off
On
STOP: The PLC program is not being processed.
STOP can be triggered by the PLC program, an
error, or an operator input.
Flashes at 0.5 Hz
On
HALT: The PLC user program has been halted
(triggered by a test function)
Flashes at 2 Hz
On
RESTART: A PLC start is executed (transition from
STOP to RUN). Transition to STOP takes place if the
run is cancelled.
off
•
On
•
3 seconds
•
On
MEMORY RESET: A general reset is requested.
off
•
On
•
flashes at 2 Hz for
minimum 3
seconds
•
On
MEMORY RESET: A general reset is active
Group: NC latency time
The following information is grouped together in the NC latency group box:
●
NC latency time
The basis of the SINUMERIK 840Di sl real-time property is activation of the NC system
software cyclically in defined time intervals.
Because the NC and Windows XP share the available PCU processor power, delays
(latencies) may occur when invoking the NC. If latencies are longer than 200 μs they are
considered to be violation of real-time with which the NC functionality is now longer
ensured.
On the NC latency display it is possible to observe the NC's latency behavior
continuously for a period of 50 seconds. This can be used, for example, ascertaining to
what extent the real-time response of the NC has been affected after replacing or
expanding hardware and/or software components.
Note
For detailed information about the real-time-based reactions of the SINUMERIK 840Di,
see Chapter "Real-time-based reactions" (Page 23).
