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Components
Diagnostic repeaters
Switch for Ethernet
Status LEDs for PROFINET IO and PROFIBUS DP
Comparison of LEDs for diagnostics
The following table includes information on the LEDs available for an initial diagnostics and
the meaning of the LED.
LED
BUSF
RX
Service support and diagnostics (V8.0)
Service Manual, 03/2012, A5E02779775-02
You can find information about diagnostic options in the following manuals and
sections:
SIMATIC;
Manual
Diagnostic Repeater for PROFIBUS DP
● LED diagnostics
Operating Instructions
Industrial Ethernet Switches SCALANCE X-400
● LED
Commissioning manual
and SCALANCE X-200 Product Line
● SCALANCE X<...> displays (SCALANCE X208 displays, for example)
SIMATIC NET; Industrial Ethernet OSM/ESM
Manual
● Display and control elements
Meaning for PROFINET IO
Lit up in red:
Bus error (no physical connection to a
subnet/switch)
Incorrect transmission rate
Full duplex transmission is not activated
Flashing:
The PROFINET device is a controller:
Failure of a connected IO device
At least one of the assigned IO devices
cannot be addressed
Incorrect configuration
The PROFINET device is an IO device:
The watchdog time has expired.
Bus communication via PROFINET is
interrupted.
IP address is incorrect.
Incorrect configuration
Incorrect parameter assignment
Incorrect or missing device name
IO controller not available/turned off, but
Ethernet connection exists.
Lit up in yellow:
Data is received via the interface.
The LED flickers when low data volumes
are transferred.
7.17 Diagnostics for hardware displays
SIMATIC NET;
SIMATIC NET; Industrial Ethernet, SCALANCE X-100
Meaning for PROFIBUS DP
Lit up in red:
Bus error at interface (e.g. bus short-circuit)
Flashing:
The module is a DP master:
Failure of a connected station
At least one of the assigned slaves cannot
be addressed
Incorrect configuration
The module is a DP slave:
The watchdog time has expired.
Bus communication via PROFIBUS DP is
interrupted.
PROFIBUS address is incorrect.
Incorrect configuration
Not available
Diagnostics in PCS 7
89

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