Siemens SIMATIC ET 200MP Manual page 28

Interrupts and diagnostic, error, and system alarms
5.1 Status and error displays
Meaning of the LEDs P1 LINK/TX/RX, P2 LINK/TX/RX
Table 5- 2 Meaning of the LEDs P1 LINK/TX/RX, P2 LINK/TX/RX
LEDs
P1 LINK/TX/RX,
P2 LINK/TX/RX
There is no Ethernet connection between the
PROFINET interface of your PROFINET device
Off
and a communication partner (e.g. IO controller).
There is an Ethernet connection between the
PROFINET interface of your PROFINET device
On
and a communication partner (e.g., IO controller).
There is active data traffic (sending/receiving) via
the Ethernet connection.
flickers
"Node flash test" is performed. (The LEDs
RUN/ERROR/MAINT are also flashing.)
Flashes
28
Meaning Remedy
Check whether the bus cable to the switch/IO
controller is interrupted.
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Interface module IM 155-5 PN ST (6ES7155-5AA01-0AB0)
Manual, 11/2017, A5E03612323-AC