Siemens ET 200SP HA - Mt Led; Act Led

7.2.3 MT LED
De󹪝nition
The MT LED provides maintenance information.
Description
The MT LED indicates the following maintenance status:
MT LED Meaning
O󹪜
Maintenance is not required.
On
Maintenance is required, meaning that at least one maintenance event has occurred.
Note
Redundant interface modules (IM): Maintenance LED and ER LED are illuminated on both
IMs
If the station was con󹪝gured with V1.0 in HW Con󹪝g and both IMs have di󹪜erent 󹪝rmware
versions, the following behavior can occur:
Maintenance LED and ER LED are illuminated on both IMs.
The cause can be a 󹪝rmware update of a redundant interface module (IM) from V1.0.x to a
higher version or replacement of an IM.
Solution: Make sure that both IMs have the same 󹪝rmware version.
7.2.4 ACT LED
De󹪝nition
The ACT LED indicates the status of the IM. It is only relevant for IO devices with redundant IM.
Displays and interrupts
7.2 LEDs
IM 155-6 PN HA
30 Equipment Manual, 09/2021, A5E39262148-AE