Siemens SIMATIC ET 200AL System Manual page 324

Interrupts, error messages, diagnostics and system alarms
5.1 Status and error displays
Meaning of the LEDs
The following tables set out the meaning of the status and error displays. Corrective
measures for diagnostics alarms can be found in the section Diagnostics alarms (Page 32).
LED RUN, LED ERROR, LED MAINT
Table 5- 1 Status and error displays of the LEDs RUN, ERROR, MAINT
LEDs
RUN ERROR
Off Off
On On
Off
Flashes
Not rele-
vant
On
Not rele-
vant
Flashes
Not rele- Not rele-
vant vant
Flashes Flashes
Not rele-
vant
Flashes
28
MAINT
Missing or insufficient supply voltage on
interface module.
Off
Test of LEDs during startup: The three
LEDs light up simultaneously for approxi-
On
mately 0.25 s.
Interface module is deactivated.
Off
Interface module is not configured.
ET 200AL starts up.
ET 200AL is being assigned parameters.
Not rele- ET 200AL is currently exchanging data
vant with the IO controller.
Not rele- Group error
vant
The preset configuration does not corre-
spond to the actual configuration of the
ET 200AL.
Parameter assignment error in the I/O
module
Maintenance
On
The "Node flash test" is run (the LEDs
P1 LINK and P2 LINK of the PROFINET
Flashes
interface also flash).
Hardware or firmware defective (The LEDs
P1 LINK and P2 LINK of the PROFINET
interface do not flash).
Not rele- Firmware is loading
vant
(all LEDs remain in their current state
while the firmware update is being writ-
ten)
Meaning Solution
Check the supply voltage or switch it on
on the interface module.
---
Activate the interface module with the
configuration software or the user pro-
gram.
Configure the interface module with the
configuration software.
---
---
Evaluate the diagnostics and eliminate the
error.
Check the configuration of the ET 200AL
to see whether a module is missing, de-
fective or if a module that is not config-
ured is connected to ET-CON1 or ET-CON2
.
Evaluate the display of the module status
in STEP 7 or in STEP 7 (TIA portal) and
correct the errors in the I/O module.
See section Maintenance events (Page 33)
---
Replace the interface module.
---
IM 157-1 PN (6ES7157-1AB00-0AB0)
Equipment Manual, 05/2021, A5E32347036-AE