Siemens SIMATIC ET 200SP Manual page 37

LED display of configuration errors
Configuration errors of the ET 200SP distributed I/O system are output on the interface
module by the ER (red) and MT (yellow) LEDs.
The following configuration errors are indicated by the LEDs:
● Missing server module
● Interruptions or short circuit on the backplane bus
Principle of operation
You determine the information for cause of the error with the LED error display. After
notification by the flash signal, the error type is displayed followed by the error location/error
code.
The LED error display
● is active during POWER ON as well as during operation.
● Has priority over all other states that are displayed by means of the ER and MT LEDs.
● remains turned on until the cause of the error has been corrected.
Table 5- 4
Sequence
1 ER and MT LEDs flash 3x with 0.5 Hz
2 MT LED flashes with 1 Hz
3 ER and MT LEDs flash 3x with 2 Hz
4 ER LED flashes with 1 Hz
5 MT LED flashes with 1 Hz
6 Repeat steps 1 to 5 until the cause of the error has been corrected.
IM 155-6 PN HS interface module (6ES7155-6AU00-0DN0)
Manual, 09/2016, A5E34928647-AA
Display of error type and error location
Interrupts, diagnostics, error, and system messages
Description
Signaling of error type
Display of the error type (decimal)
Signaling of error location/error code
Display of tens digit (decimal) of the error loca-
tion/error code
Display of ones digit (decimal) of the error loca-
tion/error code
5.1 Status and error displays
37