IMC CANSAS - Bus-Off Error - Change Baudrate; Racks; Racks, Slot Identification

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General notes on working with imc CANSAS modules 115

3.5.4 Bus-off error - Change baudrate

When configuring the imc CANSAS modules, their Baud rates must be known. When the imc CANSAS

software is exited, the last Baud rate to have been set is saved along with the database (mdb-file). This

ensures that upon any later measurement, the imc CANSAS hardware and the PC are both using the same

Baud rate.

If, however, an older database is loaded, it's possible for the database's Baud rate not to match the one

used by imc CANSAS. A Bus-off error occurs. Avoid Bus-off errors by observing the following:

Any change of Baud rate must be made simultaneously for all modules.

If different mdb-files are used to create the configurations, the same Baud rate must be used

absolutely always.

Whenever possible, a system should only use one single Baud rate value. Even if there are several

nodes, the probability of an error is reduced.

Consider using your option to order your imc CANSAS unit factory configured with the desired Baud

rate.

Use as the Master ID= 2 and the Slave ID= 3 (as with Standard Racks)

Note

imc CANSAS is using the slave ID plus seven following IDs. If ID = 2 and Slave ID = 3, then the IDs

4..10 will also be reserved and can’t be used for other purposes.

3.5.5 Racks

3.5.5.1 Racks, slot identification

In the 19" subracks or module cages produced by imc, there is an Eprom on the subrack's backplane for

each slot. If a imc CANSAS-module is inserted into the slot, it is connected to the power supply, the CAN-

Bus and to the slot's Eprom as soon as it docks in. The Eproms are factory-programmed to describe the

Positions 1 .. 10 (or another highest position depending on the width of the cage).

The imc CANSAS operating software can query the contents of this Eprom. To do this, select the module

in the tree on the left side of the user interface (the module's base entry), and on the right-hand side, the

index card Slot-Info. Then hit the Update button. The Eprom's contents are read out. Naturally, the

module must be connected in order for this to work, and must be in contact with the PC via the CAN-Bus

and be inserted into a rack having Eproms.

Other manuals for IMC CANSAS