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Introduction to the Enraf CIU communication unit: The Enraf CIU communication control unit is divided into two layers; the first layer is CIU Prime, and the second layer is CIU Plus. CIU Prime Prime – Collecting field data. CIU Prime Prime is primarily used for collecting data from the field; scanning all storage tanks takes only a few seconds. Prime provides two outputs: one can be used to send all the signals from the individual measurements to the CIU Plus, while the other can be connected to Enraf’s dedicated radar debugging software, which allows for the necessary adjustments to the radar’s operating parameters; this enables the generation of waveform diagrams for the entire storage tank. CIU Plus —— Independent calculation. CIU Plus is primarily used for independent hardware-based calculations. We can input all the tank capacity data into CIU Plus using Enraf’s Ensite Pro software. By combining the internationally standard ASTM and API petroleum measurement formulas, China’s national standards for petroleum measurement, as well as international standards suitable for various chemical products, the single measurement signal obtained from CIU Prime allows for real-time calculation of values such as the apparent volume, standard volume, standard density, and mass of the oil. It can have multiple independent outputs, allowing it to be connected to various different systems; for example, it can be connected to the Entis Pro inventory management system, PLC systems, DCS systems, etc., with each system operating independently of the others. The functions of the Entis Pro inventory management software allow the relevant data, calculated by the measurement software package within CIU Plus, to be displayed in real time on the Entis Pro software in the central control room. This includes information such as the product’s liquid level, temperature, apparent density (which can be entered manually or measured automatically), standard density, apparent volume, standard volume, and mass. The software also offers a variety of internationally recognized correction formulas for the volume and mass of chemical substances, enabling users to choose from them; automatic conversion between different units of measurement can be carried out as needed. l Redundancy capability: The Enraflo CIU Prime and CIU Plus can achieve a complete cross-redundancy architecture. l CIU Prime technical specifications: Fieldbus interfaces: up to 4, with each interface supporting 15 meters. Fieldbus protocol: Enraf BPM protocol. Maximum number of supported meters: 50. Field communication rate: 1200, 2400bps. Uplink communication interfaces: 2, RS-232C/485. Uplink communication protocol: ModBus. Uplink communication rate: 1200 to 19200 bps. Power supply: 220Vac. l CIU Plus technical specifications: Field interfaces: 2, RS-232C/485. Field communication protocol: ModBus protocol (for connection to CIU Prime). Maximum number of supported meters: 50. Field communication rate: 1200 to 19200 bps. Uplink communication interfaces: up to 4, RS-232C/485. Uplink communication protocol: ModBus. Uplink communication rate: 1200 to 38400 bps. Power supply: 220Vac. Last edited by 771207 on 2008-1-3 17:55.]