General notes on working with imc CANSAS modules 119
imc CANSAS Users Manual - Doc. Version 1.9 - 05.12.2014© 2014 imc Meßsysteme GmbH
If it ever does occur that modules with different Baud rates are joined in a common CAN-Bus, there
will constantly be bus errors. imc CANSAS-modules will either not always show up during searches
or not at all, or configuration fails etc. The symptoms are the same as for a physically defective bus,
e.g., due to a line which is too long, or if there is too much interference or incorrect termination
(e.g. the 120 resistors needed at both ends of the CAN-line are missing). If you are certain that
the trouble is caused by different module Baud rates, you can remove the offending modules from
the system and set them to the correct Baud rate separately. Alternatively, you can use the Reset-
plug. There are two ways to do this:
The Reset-plug is inserted in every imc CANSAS-module.
A CAN-cable is used, to which Pins 3 and 4 of the 9-pin DSUB-plug are connected. In this case, a
Reset-plug on one module is sufficient.
The point of the Reset-plug is that Pins 3 and 4 are jumpered. If a module detects this short circuit upon
activation of its power supply, it starts with the standard Baud rate of 125 kbit/s. You can then find all
modules at once in the integrating process, set the new Baud rate for them and then configure them.
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