Siemens SIMATIC ET 200SP Manual page 27

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 before all other states displayed by the ERROR and MAINT LED.
● remains turned on until the cause of the error has been corrected.
Table 5- 4
Sequence
1 The ERROR and MAINT LEDs flash 3x at
2 MAINT LED flashes at 1 Hz
3 The ERROR and MAINT LEDs flash 3x at 2 Hz
4 The ERROR LED flashes at 1 Hz
5 The MAINT LED flashes at 1 Hz
6 Repeat steps 1 to 5 until the cause of the error has been corrected.
IM 155-6 PN ST interface module (6ES7155-6AU00-0BN0)
Manual, 12/2014, A5E03576904-AC
Display of error type and error location
0.5 Hz
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
location/error code
Display of ones digit (decimal) of the error
location/error code
5.1 Status and error displays
27