Siemens SIMATIC ET 200pro Operating Instructions Manual page 118

Meaning of LINK RX/TX LED
X1 P1, X1 P2 and X2 P1 each have a LINK RX/TX LED (yellow/green LED). Port X1 P3 has
a LINK LED (green) and an RX/TX LED (yellow).
The table below shows the various "LED scenarios" of ports X1 P1, X1 P2 and X2 P1.
LINK RX/TX LED *
LED off
LED flashes green
LED lit green
LED flickers yellow
* At startup, the CPU does not perform an LED flash test. This means that the LEDs do not light up immediately.
The table below shows the various "LED scenarios" of port X1 P3.
LINK RX/TX LED *
Green LED and yellow LED
off
Green LED flashes green
Green LED lit green
Yellow LED flickers yellow
* At startup, the CPU does not perform an LED flash test. This means that the LEDs do not light up immediately.
Note
"LED" instruction
You can read the status (e.g. "On" or "Off") of LEDs of a CPU or a module using the "LED"
instruction. Note, however, that is not possible to read out the LED status of the
LINK RX/TX LEDs on the CPU 1516pro-2 PN.
You can find additional information on the "LED" instruction in the STEP 7 online help.
CPU 1516pro-2 PN (6ES7516-2PN00-0AB0)
Operating Instructions, 11/2019, A5E35873416-AC
There is no Ethernet connection between the PROFINET interface of the PROFINET device
and the communications partner.
No data is currently being sent/received via the PROFINET interface.
There is no LINK connection.
The "LED flashing test" is being performed.
There is an Ethernet connection between the PROFINET interface of your PROFINET de-
vice and a communication partner.
Data is currently being received from or sent to a communications partner on Ethernet via
the PROFINET interface of the PROFINET device.
There is no Ethernet connection between the PROFINET interface of the PROFINET device
and the communications partner.
No data is currently being sent/received via the PROFINET interface.
There is no LINK connection.
The "LED flashing test" is being performed.
There is an Ethernet connection between the PROFINET interface of your PROFINET de-
vice and a communication partner.
Data is currently being received from or sent to a communications partner on Ethernet via
the PROFINET interface of the PROFINET device.
Interrupts, diagnostics, error messages and system events
11.1 Status and error display of the CPU
Meaning
Meaning
117