Siemens simatic ET 200MP - Meaning of the LED Displays; RUN and ERROR LED; CHx LED

Parameter
4.3 Configuration control (option handling)
IM 155-5 PN HF Interface Module (6ES7155-5AA00-0AC0)
32 Manual, 10/2018, A5E32840985-AB
4.3.4
Extending the configuration
Operating principle
You can add modules at the end of the configuration with this procedure. The configured
configuration can also be extended from the center based on freely selectable slot
assignment.
Figure 4-2 Extending the configuration