Hello everyone! I'm having a similar problem. I'm trying to configure a profibus i/o distributor without any success. I'm using in my controller the X20IF1061 profibus master and slave. As a master, I'm using a SIEMENS SIMATIC S7-300 CPU. As a slave, I'm using a robotic arm COMAU. I am trying to connect comau robot With s7-300. The X20IF1061 is configured but it didn't recognize the CLP. It keeps indicating a error bus. Could someone help me. Is there a manual guide to setup it all. I don't even have a manual guide with all the steps and a memory map to establish communication thru the bus.