Siemens Sinumerik 840DiE sl - Page 409

01/2007
11.11NCK/PLC diagnostics
11-409
© Siemens AG 2007 All Rights Reserved
SINUMERIK 840Di sl Manual (HBIsl) – 01/2007 Edition
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 pro-
cessed. STOP can be triggered by the PLC pro-
gram, 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–up is performed (transi-
tion from STOP to RUN). Transition to STOP
occurs on start–up abort.
Off – lit
– 3 sec off
– lit
MEMORY RESET: A general reset is requested.
Off – lit
– flashing at 2 Hz
for at least 3 sec
– lit
MEMORY RESET: A general reset is active
The following information is grouped together in the NCK latency group box:
S NCK latency
The basis of the SINUMERIK 840Di sl real–time property is activation of the
NCK system software cyclically in defined time intervals.
Because the NCK and Windows XP share the available PCU processor
power, delays (latencies) may occur when invoking the NCK. If latencies are
longer than 200µ
s, they are considered real–time violations, as a result of
which the NCK functionality can no longer be guaranteed.
On the NCK latency display it is possible to observe the NCK’s latency be-
havior continuously for a period of 50 seconds. This can be used, for exam-
ple, ascertaining to what extent the real–time response of the NCK has been
affected after replacing or expanding hardware and/or software components.
Note
For detailed information about the real–time properties of the SINUMERIK
840Di sl, see Section 1.1.5, Page 1-26.
Group box:
NCK latency
11 NCK Commissionin
g
with HMI Advanced