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CIU (Control Interface Unit)
The CIU is a ”translator” between the CAN bus and the customer’s own control panel. This unit has two serial communication links, one fast and one slow. The fast one is a CAN link that features a bus speed of 250 Kbit/s. All data regarding instruments, indicator lamps, contacts and potentiometers are controlled by this bus. The slower J1708/J1587 link handles diag- nostic information for, among other things, the flash- ing code. The diagnosis tool VODIA also uses the J1708/J1587 link to communicate with the system.