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LEDs and mode selector
2.1 LED displays
Table 2- 2
SF (red)
Startup and operating statuses
Updating firmware
Errors
30
LED display schemes
BUSF
RUN
STOP
(red)
(green)
(yellow)
CP operating mode
Starting up (STOP → RUN)
Running (RUN)
Stopping (RUN → STOP)
The time required for the signaled mode change
depends on the size of the STEP 7 project; this can
take up to 1 minute in large projects.
On completion of the mode change, the data
exchange with the DP slaves continues.
Stopped (STOP)
In STOP mode, configuring and performing
diagnostics on the CP remain possible.
Stopped (STOP) with error(s).
In this state, the CPU or intelligent modules in the
rack remain accessible using PG functions.
Running (RUN) with problems on PROFIBUS.
Running (RUN) with problems on the DP slaves.
•
Ready to begin loading firmware. (Operating
mode active for a period of 10 s)
or
•
CP is in DP slave mode and is not involved in
cyclic data exchange with the DP master.
Loading firmware.
Invalid firmware was loaded.
Cp waits for firmware update. (CP has incomplete
firmware)
Module fault / system error
(The two unlabeled LEDs also flash in this status.)
Equipment Manual, 01/2023, C79000-G8976-C146-11
CP 342-5
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