eBus WIKI

The Get Device Configuration or Status command is used for requesting specific data from other eBus devices. It is used by vrDialog software to read and display device configuration and status data on the screen, or set device parameters. Each device has a number of parameters that can be read or set using this command.

[1] auroMATIC 620

The 0Dh command seems to be implemented by all Vaillant eBus devices. vrDialog application includes a file vrDIALOG810.mdb, that contains MS Access database used internally by vrDialog. This database can be accessed in order to read different configuration parameters for different supported types of Vaillant eBus devices. For example, using this database for VRT360, it the following command can be executed:

select SymList.name, type, address from ShowData , SymList where ShowData .page ='VRT360' and SymList.id = ShowData .varid and accesslevel < 50 order by ShowData .sortid=

This results in:

The Address column needs to be passed as P1 and P2 parameters to the 0Dh command. The Type column determines the type of the response from the device. The response length will depend on that (S2 byte in the response).

Here is a captured communication between vrDialog and VRT360:

FF 15 B5 09 03 0D 0F 00 67 00 03 57 01 00 3A 00

• FF - vrDialog Master address (vrDialog identifies itself as FFh)
• 15 - VR360 slave address
• B5 09 - Vaillant command B509
• 03 - data length
• 0D - command 0Dh
• 0F - requested address low byte (0F → 15 in the table above, which means „RaumtemperaturIst“ - actual room temperature)
• 00 - requested address high byte
• 67 - CRC
• 00 - slave ACK
• 03 - slave response length - 3 bytes
• 57 - response temperature low byte
• 01 - response temperature high byte. Actual reported temperature is 157h/16 → 21.43 Celsius
• 00 - temperature sensor status - 00h - OK. According to vrDialog810.mdb, sensor status is defined as follows: „struct {Data2c Temperature; State

SensorState } Sensor state is defined : State „Ok,Short circuit=85,cutoff=170“

  \\   \\  |

This command works in a similar way as 0Dh, but instead of returning configuration from the device, it sets device configuration.