HBM QuantumX MX1609, Руководство по эксплуатации, Страница: 102 / 181

102 Connection
HBM QuantumX
6.8 MX471 CAN module
6.8.1 General information
The MX471 module provides four independent CANbus nodes that are all electrically
isolated from each other and the mains.
MX471 busses that can be connected
Typ Connector sockets /
nodes
see page
CANbus (High-Speed CAN) 1 ... 4 143
Connected devices are not directly addressed during data transmission on a CANbus. A
unique identifier denotes the contents of a message (e.g. rotational speed or engine
temperature).
The identifier also signals the priority of the message.
Message = iden additional information
Devices connected to the bus = nodes
Every node on the MX471 can be parameterized either as receiver or as sender (gateway).
Parameterization as receiver is described in chapter 6.8.3. Parameterization as sender is
described in chapter 7. The online help coming with the respective software package
provides detailed information about parameterization.
Note
To ensure normal operation the CANbus needs to be terminated at both ends (and
only there) using appropriate termination resistors.
A 120 − ohm termination resistor can be individually connected 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.
The configuration of a node is retained after switching the modules off and on.
For decoding signals at a rate greater than 2000/s, please set up signal inputs 1 to 8 on the
MX471. The signal buffers of these signal inputs have been expanded accordingly.