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As a policy of continual improvement, RMF reserves the right to alter the specification without prior notice.
201.028 REV 1
Date of Issue: 18 June 2018
J1939 and CanOpen are higher level protocols built on these basic standards. J1939 uses CAN2.0A, and CanOpen
uses CAN2.0B. The CMS does not implement either of these protocols. Instead it defines a few CAN-bus messages
to communicate data. However the message identifiers have been chosen so as to allow operation with both
J1939 and CanOpen. Generally it should be possible to use the CMS with either, as well as other CAN-bus systems.
6.4.2.1
Installation
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Perform a general installation and check of the CMS as detailed in section 6 earlier.
−
Perform a one-off general configuration check of the CMS using a PC running RMF-View e.g. set it to test
continuously and automatically start testing on power up. This procedure is described earlier in section 6.
You will need a suitable RS485 interface, such as the CMS-USBi.
−
Use the software to configure any CAN-bus specific parameters required by your CAN-bus network, for
example configure a CAN-bus message ID and baud rate
Figure 6.29
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Connect the CMS to your CAN-bus network and provide a 24VDC power supply, as per figure 6.29.
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The CMS automatically emits the test result message after each set test interval.
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Configure your CAN-bus controller to listen for the messages configured above.
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The CMS requires a DC power supply and the two CAN-bus signals CANL and CANH, as shown in Figure 1.
The numbers shown are the pin numbers of the circular connector that plugs into the CMS.
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CAN-bus requires the network to be terminated at each end. This must be done externally to the CMS.
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The CAN-bus signals CANL and CANH are referred to the system 0V supply. These should stay within the
common mode range allowed by the ISO-11898-4 CAN-bus standard relative to the CMS 0V connection.
This range is -2V to +7V. This can be normally be ensured by connecting together the CMS 0V and the 0V
of the CAN-
bus controller. The ``CAN 0V’’ wire shown indicates this link. (Not needed if both CAN
-bus
controller and CMS
are connected to a vehicle chassis or otherwise ``Earthed’’.)
−
There are other wires available for switched alarm and start signals (optional). These are documented
separately in section 6.1.2.
Содержание CMS 2
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