The con­nec­tion of the CANalarm for pro­gramming purposes

he CANalarm does not have a sepa­ra­te pro­gramming inter­face. Pro­gramming is done via the CAN bus its­elf. You must, the­r­e­fo­re, set up a func­tio­ning bus in order to be able to con­nect to the con­fi­gu­ra­ti­on software.

It is not suf­fi­ci­ent to con­nect the CANalarm to a CAN-2-USB inter­face. The mini­mum con­fi­gu­ra­ti­on con­sists of two ter­mi­na­ting resis­tors, a CAN-2-USB inter­face and the power sup­p­ly for the CANalarm. (in prac­ti­ce, a sin­gle ter­mi­na­ting resis­tor is usual­ly suf­fi­ci­ent wit­hout a cable)

The CANalarm is addres­sed via the soft­ware on two con­fi­gura­ble IDs. The default set­ting is 7A0h for the Set-ID and 7A1h for the Reply-ID.

If the addres­ses are unknown, the con­fi­gu­ra­ti­on menu via the keys on the CANalarm can help. Press the “Reset” and “Mode” but­tons tog­e­ther for one second. By repea­ted­ly pres­sing the “Mode” but­ton, the Set-ID and the Rep­ly-ID are also dis­play­ed. The­se ID’s must be ente­red in the con­fi­gu­ra­ti­on soft­ware in order to com­mu­ni­ca­te with the CANalarm. A chan­ge of the ID’s is only pos­si­ble via the software.

The con­fi­gu­red addres­ses must be free on a later bus. The con­fi­gu­ra­ti­on can also be car­ri­ed out later direct­ly in the run­ning bus.

In a bus with a power sup­p­ly, the CANalarm gets its power from there.

Fur­ther details on the con­fi­gu­ra­ti­on soft­ware can be found in the CANalarm manu­al in sec­tion 5.2.1.