HBM SOMATXR, Руководство по эксплуатации

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QuantumX / SomatXR and CAN
16
A4461-2.0 HBM: public
CANBus
5 QuantumX / SomatXR and CAN
5.1 General information
The MX471B module provides four independent CAN
bus nodes that are all electrically isolated from each
other and power supply. Module MX840B provides an
electrically isolated CANbus node on channel 1.
Connected devices are not directly addressed during
data transmission on a CAN bus. A unique identifier de­
notes the contents of a message (e.g. rotational speed or
engine temperature).
The identifier also signifies the priority of the message.
Message = iden additional information
Device connected to the bus = node
Each node on the MX471B can be parameterized either
as a receiver or as transmitter (gateway). The online help
that comes with the respective software package
provides detailed information about parameterization.
Notice
To ensure normal operation, the CAN bus needs to be
terminated at both ends, and only there, using appropri­
ate termination resistors.
A 120-ohm termination resistor can be individually con­
nected in the module by software. Termination is also
required when short cables with low bit rates are used.
Please refer to the data sheet for the relation between bit
rate and maximum bus line length.