| 摘要 |
<p>In a more efficient distributed control or monitoring arrangement there are devices in control, monitoring and/or vehicle systems that comprise locally deployed module units that carry out one or more functions, and one or more links connecting the units. The respective module unit is connected to a link via a connection arrangement or a connection point and requisite communication device for the CAN protocol. A CAN control unit is arranged to receive indication of falling edges on the bus in question, and to carry out measurement of the time between falling edges using clock pulses in its clock function. Information from two or more such measurements forms the basis for calculation of a bit frequency currently used in communication on the bus by active module units connected to the same. The respective module unit comprises one or more communication devices that are free-standing or integrated in a microprocessor chip comprising at least a function performing microprocessor that is arranged with or interworks with at least one memory area. The content in the memory of a first module unit is readable and/or writable via the link from a second module unit in the system without significant assistance from the function performing microprocessor in the first module unit.</p> |
