CAN-Network (Controller Area Network): Configuration

Instructions for the following are downloaded when a system is configured:

• Which control modules are included in the system (for example central electronic module (CEM), and others.)
• Which control module should do what (for example "you are the control module for the driver's door - you are the control module for the passenger door")
• Which functions should be included (for example if the alarm function should be on or off)
• Which components are connected to the control modules (for example whether the inclination sensor is included in the alarm or not)
• Which messages a control module is to transmit and which it is to receive
• Where the different data should be stored.

In the central electronic module (CEM), information is stored on which control modules are installed in this particular vehicle. This information is stored and retrieved from Volvo's central database when software is downloaded. The central electronic module (CEM) also contains information on which primary signal configuration is to be used in the vehicle. Information on the vehicle's signal configuration must be stored in all control modules connected to the CAN network so that they can communicate in the first place.

The signal configuration is a part of the software downloaded after a control module is fitted or replaced. When software is loaded to a control module, the information in the control module indicating, for example, that a new accessory has been connected is updated automatically.

Once software has been downloaded, some values may be changed according to the customer's requirements, for example whether lamp indication upon locking or unlocking the vehicle should be active, or the dip degree of the interior rear view mirror. These settings may disappear when new software is downloaded.

Software is downloaded via the Software Manager.