Controlling The Mode - Siemens SIMATIC NET S7-400 Manual

Installation, connecting up, commissioning

5.5 Controlling the mode

5.5 Controlling the mode
You can change the mode of the CP between RUN and STOP using the STEP 7
configuration software or using STEP 7 special diagnostics.
Change from STOP to RUN:
The CP loads configured and/or downloaded data into the work memory and then changes
to RUN mode.
Change from RUN to STOP:
The CP changes to STOP (transitional phase with LED display "Stopping").
The reaction is as follows in STOP:
● Established connections (ISO transport, ISOonTCP, TCP, UDP connections) are
terminated
● The following the functions are disabled:
– Time-of-day synchronization
● The following functions remain enabled:
– The configuration and diagnostics of the CP (system connections for configuration,
– Web diagnostics
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diagnostics, and PG channel routing are retained);
CP 443-1 RNA
Manual, 03/2019, C79000-G8976-C299-04