Interrupts, diagnostics, error, and system messages
5.1 Status and error displays
IM 155-6 PN ST interface module (6ES7155-6AU01-0BN0)
Equipment Manual, 10/2020, A5E03576904-AE
27
RN/ER/MT LED on the interface module
Table 5- 1
RN/ER/MT status and error displays
LEDs
Meaning
Remedy
RN
(RUN)
ER
(ERROR)
MT
(MAINT)
Off
Off
Off
Missing or insufficient supply voltage
on interface module.
Check the supply voltage or turn in on
at the interface module. *
On
On
On
Test of LEDs during startup: The three
LEDs light up simultaneously for ap-
proximately 0.25 s.
-
Flashes
Off
Off
Interface module is deactivated.
Activate the interface module with the
configuration software or the user pro-
gram.
Interface module is not configured.
Configure the interface module with
the configuration software.
ET 200SP starts up.
-
ET 200SP is configured.
ET 200SP is reset to factory settings.
On
Not rele-
vant
Not rele-
vant
ET 200SP is currently exchanging data
with the IO controller.
Not rele-
vant
Flashes
Not rele-
vant
Group errors and group error channels. Evaluate the diagnostics data and rem-
edy the error.
The configured structure does not cor-
respond to the actual structure of the
ET 200SP .
Check the structure of the ET 200SP to
see whether a module is missing or
defective, or whether a non-configured
module is plugged.
Invalid configuration states.
See section Invalid configuration states
of the ET 200SP on PROFINET IO
(Page 37)
Parameter error in the I/O module.
Evaluate the display of the module
status in STEP 7 and eliminate the error
in the respective I/O module.
Not rele-
vant
Not rele-
vant
On
Maintenance
See section Maintenance events
(Page 32)
Flashes
Flashes
Flashes
The "Node flash test" is run (the LEDs
LK1 and LK2 of the PROFINET interface
also flash).
-
Hardware or firmware defective (the
LEDs LK1 and LK2 of the PROFINET
interface do not flash).
Run a firmware update. If the error
persists, contact Siemens Industry
Online Support.
Replace the interface module.
* PWR LED on (on the interface module): Check the backplane bus for a short circuit.
