Siemens SIMATIC ET 200eco PN M12-L Equipment Manual page 53

Behavior of the LEDs RN/NS (RUN/network status), ER/MS (ERROR/module status) and MT/IO
(MAINT/IO status) on modbus TCP
The LEDs display the status with the highest priority if there are different LED states due to
overlaid events. (0 = off, 1 = green flashing, 2 = green, 3 = yellow, 4 = red flashing, 5 = red)
The following table shows the meaning of the RN/NS, ER/MS LEDs and MT/IO LEDs for Modbus
TCP:
Table 6-3 Error display of the LEDs
RN/
NS
Off
Flashes
On
Flashes Flashes
On
On
Flashes Flashes
Flashes Flashes
Flashes Flashes
Flashes Flashes Flashes
Flashes Flashes Flashes
Flashes Flashes Flashes
I/O device digital inputs DI 16x24VDC M12-L 8xM12 (6ES7141-6BH00-0BB0)
Equipment Manual, 03/2023, A5E46570510-AD
LEDs
ER/ MT/
MS IO
Missing or insufficient supply voltage
Off Off
at the I/O device.
I/O device on, no data exchange
Off Off
The I/O device is exchanging data with
Off Off
any connection.
MultiFieldbus project is present in the
Off
I/O device, no data exchange
The I/O device exchanges data without
On Off
errors via a modbus TCP connection
The I/O device exchanges data. An
Off
error has occurred in the I/O device.
Flashes
The I/O device does not exchange data.
Off
An error has occurred in the I/O device.
An existing connection to modbus TCP
Off
was terminated by a timeout
An existing connection to Modbus TCP
Off
was terminated by a timeout.
Errors in the configuration or paramet­
er assignment.
Test of LEDs during startup: The three
LEDs light up simultaneously for
approximately 0.25 s in red. Then for
approximately 0.25 s in green.
Hardware or firmware defective.
The "Node flash test" is running (the
P1 LK and P2 LK LEDs are also
flashing).
Meaning
•
Check the following:
•
•
•
Check the following:
•
•
---
•
Modbus TCP
6.2 Diagnostics
Remedy
Check the supply voltage.
Configuration
Parameter settings
PNIO diagnostics
Configuration
Parameter assignment
You can read out the service data
with MFCT.
53