text: <s>[INST] Documentation explanation Hello, Here is a copy of the PowerFlex 4 and 40 Technical Data.All communications looks to be present for the PF40, is that true ?I want to use a Modbus RTU link, is it possible without an additionnal board ? Many thanks. Serge. [/INST] Yes, this is true; see also this LINK for more infos. All the PF4x drives can be controlled through a Modbus RTU link,using the Integral RS-485 port, without additional boards (and costs! :smileytongue: ) See appendix C of the User Manual for supported Modbus functions and connections. You may also find some infos and hints in the Knowledgebase (for example in Aid 27558) Hope this helps… - fuzzy logic \\n </s>