Siemens SIMATIC ET 200eco PN M12-L Equipment Manual page 41

PROFINET IO
5.2 Interrupts/diagnostics alarms
RN/NS
(green)
Not rele-
flashes
LEDs P1 LK and P2 LK
The following table describes the behavior of LEDs that indicate the connection status with a
PROFINET IO controller or a PROFINET switch.
Table 5- 4
P1 LK
40
LED
ERR/MS
(red) (yellow)
Not rele-
vant vant
On (yellow)
flashes
Status displays of the LEDs P1 LK and P2 LK
LEDs Meaning
P2 LK
There is no Ethernet connection
between the communications
off
interface of your IO device and a
communication partner (e.g.
IO controller).
There is an Ethernet connection
between the communications
On (green)
interface of your IO device and a
communication partner (e.g.
IO controller).
The "Node flash test" is running
(the RN/NS, ER/MS and MT/IO LEDs
Flashes
also flash).
Communication error: A physical
connection exists but communica-
tion is not possible.
CM 8x IO-Link + DIQ 8x24VDC M12-L 8xM12 (6ES7148-6JJ00-0BB0) communications module
Meaning
MT/IO
Maintenance
The "Node flash test" is run-
ning (the P1 LK and P2 LK
flash
LEDs of the PROFINET inter-
face are also flashing).
Hardware or firmware faulty.
(The P1 LK and P2 LK LEDs of
the PROFINET interface are
not flashing).
Remedy
Evaluate the maintenance
events.
-
Replace the ET 200eco PN
I/O device.
Remedy
Check whether the bus cable to the
switch/communication partner is
interrupted.
-
-
Check the PROFINET IO settings.
Equipment Manual, 12/2022, A5E51718265-AB