Siemens SIMATIC PCS 7 Service Manual page 107

The following table includes information on the LEDs available for an initial diagnostics and
the meaning of the LED.
LED
BUSF
RX
TX
LINK
FO
Service Support and Diagnostics (V8.2)
Service Manual, 03/2016, A5E36200111-AA
Meaning for PROFINET IO
Lit up in red:
Bus error (no physical connection to a sub‐
net/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 can‐
not be addressed
Incorrect configuration
The PROFINET device is an IO device:
The watchdog time has expired.
Bus communication via PROFINET is inter‐
rupted.
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.
Lit up in yellow:
Data is sent via the interface.
The LED flickers when low data volumes
are transferred.
Lit up in green:
Another device (most often a switch) is con‐
nected and the physical connection exists.
Lit up in yellow:
The respective transmission path has to be
inspected.
Diagnostics in PCS 7
8.17 Diagnostics for hardware displays
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
Not available
Not available
Not available
End of form
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