Operating Principle - Siemens SIMATIC ET 200SP Manual

LED display of configuration errors
Configuration errors of the ET 200SP distributed I/O system are output on the interface
module by the ERROR (red) and MAINT (yellow) LEDs.
The following configuration errors are signaled by the LEDs:
● No server module
● Interruptions or short-circuit on the backplane bus

Operating principle

The LED error display provides information on the cause of the error. After notification by the
flash signal, the error type is displayed followed by the error location/error code.
The LED error display
● is activated during POWER ON and during operation.
● has priority over all other states that are displayed by means of the ERROR and MAINT
LED.
● remains turned on until the cause of the error has been removed.
Table 5- 4
Sequence
1
2
3
4
5
6
IM 155-6 PN HF interface module (6ES7155-6AU00-0CN0)
Manual, 03/2015, A5E03915895-AF
Display of error type and error location
The ERROR and MAINT LEDs flash 3x
at 0.5 Hz
MAINT LED flashes at 1 Hz
The ERROR and MAINT LEDs flash 3x
at 2 Hz
The ERROR LED flashes at 1 Hz
The MAINT LED flashes at 1 Hz
Repeat steps 1 to 5 until the cause of the error has been removed.
Interrupts, error messages, diagnostics and system alarms
Description
Indication of the error type
Display of error type (decimal)
Indication 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
37