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System 300S
9.13.5
Diagnostics via status LEDs
LEDs PROFINET IO con-
troller X8
MT (Maintenance)
yellow
X
X
4Hz
2Hz
not relevant: X
L/A (Link/Activity)
green
flickers
not relevant: X
HB140 | CPU | 315-4PN23 | en | 18-02
BF (Bus error)
Meaning
red
n
n
n
n
n
2Hz
n
X
Maintenance event is pending.
The alternate blinking indicates that a firmware update of the
PROFINET IO controller is executed.
4Hz
Firmware update of the PROFINET IO controller is finished
without error.
X
With a suited configuration tool you can cause the MT LED to
blink by means of the function 'Member blink test' . This can be
useful for e.g. identification of the module.
S (Speed)
Meaning
green
X
The PROFINET IO controller is physically connected to the
Ethernet interface.
X
There is no physical connection.
X
Shows Ethernet activity of the PROFINET IO controller.
The Ethernet interface of the PROFINET IO controller has a
transfer rate of 100Mbit.
The Ethernet interface of the PROFINET IO controller has a
transfer rate of 10Mbit.
Deployment Ethernet communication - PROFINET
PROFINET diagnostics > Diagnostics via status LEDs
Bus error, no connection to sub net/switch
wrong transfer rate
Full-duplex-transmission is not activated
Failure of a connected IO device
At least one IO device is not access-able
Faulty configuration
139
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