User´s Manual - I+ME ACTIA GmbH

CAN Setup
CAT supports normal "Dual Wire" CAN and additionally the Single Wire CAN. For easy Setup of CAT
to the users CAN bus application there are already three physical layers predefined: Single Wire CAN,
Dual Wire CAN (Mid Speed), Dual Wire CAN (High Speed).
The user can configure the Baud Rates for each of the layers as they are in his CAN applications. So the
user can easy change between Mid Speed and High Speed and does not need to define the Baud Rate
each time.
CAT allows the user to determine if CAN messages shall be acknowledged by CAT even if CAT is
Offline or in Diagnostic Offline. See CAT Diagnostic Setup for details how to set up.
For the Single Wire CAN the user can setup the Baud Rates for the Low Speed and the High Speed
mode (used only with the $A5-ProgrammingMode Service). The Baud Rate, defined as Low Speed,
will be used for the "normal" communication. If the CAN system foresees to switch between two
different baud rates the user has to define a High Speed baud rate.
Choose menu item Configurations | CAN Setup from the main window to open the CAN Setup...
window shown above.
Physical Layer:
Click on a radio button to select and mark one of the physical layers.
Baud Rate:
Select a predefined Baud Rate from the List assigned to the chosen physical layer.
BTR 0 + 1:
The Bit Timing Register (BTR) will be calculated and shown depending on the chosen Baud Rate.
Note: These are the BTR for the SJA 1000 CAN Controller used by CAT.
If the Baud Rate of ones CAN System is not listed in any of the Baud Rate Lists of the different layer, the Baud Rate
can be determined by setting the BTR manually.
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