Title: DOCA0005EN-12.pdf
The control or function field of the telegram. It provides information about the telegram, such as the direction of data flow (master to slave or slave to master), the status of the data flow and the function of the message.CI-FieldThe control information field of the telegram. It defines the type and sequence of data to be transmitted.Fixed data headerContains device and manufacturer identification information.DIFData information field. The DIF contains information about the function of the data (for example, instantaneous versus maximum) and the data format (for example, 16-bit integer).DIFEData information field extension. A DIFE contain additional information about the data, such as tariff and subunit.MasterA device that issues commands and receives responses from slave devices. There can be only one master per serial network.SlaveA device that provides information or performs actions in response to requests from the master.VIF / VIFE