Debugging functions, diagnostics and troubleshooting
10.6 Diagnostics using status and error LEDs
S7-300, CPU 31xC and CPU 31x: Installation
10-16
Operating Instructions, Edition 08/2004, A5E00105492-05
10.6.6
Status displays: CPUs with PN Interface
Status and Error Indicators: PROFINET devices
Note
The RX and TX LEDs can be combined in one LED, same as on CPU 317-2 DP/PN or CP
343-1 The LED on this device is located, for example, behind the front cover.
LED status
Description of the status
LED
Not lit
Flashes
Lit
-
-
X
The Ethernet connection between the PROFINET
interface X2 of your PROFINET device and a
communication partner is up (for example, a switch).
-
X
-
Only with an IO device:
The user activated flashing from STEP 7.
LINK
X
-
-
The Ethernet connection between the PROFINET
interface of the PROFINET device and the
communication partner is down.
-
-
X
(flickers)
At the current time, data are being received from a
communication partner on Ethernet via PROFINET
interface of the PROFINET device.
RX
X
-
-
No data are currently received via the PROFINET
interface.
-
-
X
(flickers)
Data are currently sent to a communication partner on
Ethernet via the PROFINET interface of the PROFINET
device.
TX
X
-
-
No data are currently transmitted via the PROFINET
interface.
-
-
X
Error on the PROFINET interface, communication no
longer possible (for example, with a CPU as IO
controller, when the connection to the switch is down)
To correct or avoid error: See the table below
-
X
-
Error on the PROFINET interface (for example, due to
station failure of one or more IO devices)
To correct or avoid error: See the table below
BF2 or
BUSF
X
-
-
No error at the PROFINET interface