UR FAMILY – COMMUNICATIONS GUIDE 6-1UR FamilyChapter 6: IEC 60870-5-104 communicationIEC 60870-5-104 communicationThis chapter outlines the IEC 60870-5-104 communications protocol.6.1 Interoperability documentThis document is adapted from the IEC 60870-5-104 standard. The boxes indicate the following: – used in standard direction – not used – cannot be selected in IEC 60870-5-104 standard1. SYSTEM OR DEVICE System Definition Controlling Station Definition (Master) Controlled Station Definition (Slave)2. NETWORK CONFIGURATION Point-to-Point Multipoint Multiple Point-to-Point Multipoint StarThe protocol applies when ordered with the product. Check your order code.