Thank you I made it work! But now I encountered another problem... When I tried a flow in node red with only the PAC3220 it worked and I got readable values but as soon as the iot2050 connects no values are shown. Where does the iot2050 store the values? Do I need to locate specific registers?

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Split from Cant establish connection between iot2050 and PAC3220.

Yes Im sorry, I'm a little confused on what is my actual problem as well xD. But Im trying to read data from a Siemens energy meter PAC3220 to a Siemens IOT2050 using Modbus TCP. When I connect my PC directly to the PAC3220 I can read values from a flex-getter node in node red, but when i connect the PAC3220 to my IOT2050 and then have an ethernet connection between IOT2050 and my PC I can't read anything. The error messages I get from the modbus flex getter is "Port Not Open" and "TypeError: Cannot read property 'readFloatBE' of undefined". 

My quess is either that I'm looking at the wrong registers on the IOT2050, or that I have the wrong version of node.js & node-red installed. the node.js version on the IOT2050 is v12.22.12 and node-red is v2.0.6. My PC has node-red v.3.

Hope this helps!