orange cirlce means 'no license activated' - so if you use a CODESYS SL (single license) plc from the CODESYS store
you need to buy:https://store.codesys.com/catalogsearch ... /?q=EL6900
and activate this license into the plc.
If it is a plc from any manufaturer you need to check if the plc is 'single license capabale' this means if it does support
to activate a license to the plc. Therefore a runtime USB key is needed. (https://store.codesys.com/accessories/c ... mpakt.html
Either check this by using this Project with a connected runtime key:https://store.codesys.com/device-reader.html
or maybe better to be sure ask the manufacturer of the plc if they support it.(single licensing in the device)
Here is the first steps clip/video how to setup a project with EL6900.https://youtu.be/y5c-ZxtCc0o
Do not forget to set the Hardware DIP Switches on each module (unique) and this Setting should fit to the setting FSOE address.
(if everything is green, think this is well done)