Volvo Workshop Manuals
XC90 2.5T AWD L5-2.5L Turbo VIN 59 B5254T2 (2003)
Powertrain Management > Computers and Control Systems > Information Bus > Component Information > Description and Operation > The Controller Area Network (CAN) > Page 4862
A data frame consists of different parts. This consists of check data, asynchronous, synchronous and administrative data. A data frame on the MOST
1. synchronization of the clock on the MOST network, i.e. the frequency at which data is transmitted so that the data is sent at the correct intervals
16 data frames are required to form a block. One block is the minimum size of a MOST message.
All activations on the MOST network are control messages or MOST messages. The majority of the MOST messages are initiated by the infotainment
DeviceID - The ID number of one of more control modules in the network
FBlockID - The ID number of a function unit, for example the CD function in the CD module (MP2)
InstID - The ID number to differentiate between identical function units, for example two CD modules in the MOST network
FctID - The ID number of the function to be activated, for example play or stop
OPType - Specifies how the function is to be used, because a function can be used in different ways.
The message may appear as follows:
This means: play song number 10 on the CD player in the CD module (MP2).
Calculating the transfer rate
The number of "ones" and "zeros" transmitted per second determines the transfer rate.
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