This documentation is for older software versions (up to 3.1.29). If you have software version 3.1.30 or higher, go to MODERN Home |
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(Classic) Light Sensor is sending too many commands - overloaded DALI bus
- Katarzyna Stodolny
Improperly configured light sensors send multiple DALI commands in a short time. While other DALI equipment sends commands too, you can notice an overloaded DALI bus. The most obvious result of this is a system slowdown. In this case, you should check if the Hysteresis parameter is either disabled or its value is too low.
Software versions of 3.1.0 - 3.1.14 need a Deadtime Timer to be disabled.
For the software version of 3.1.15 and newer Hysteresis parameter has to be adjusted to 0%.
Starting from software version 3.1.16 this issue is being solved by automatically adjusting these parameters for a newly found devices.
Instructions
Go to the Node-RED and debug the message coming from the DALI2 Devs common node. Use the debug node for that.
You should do it like in the picture below:Open the debug window in the Node-RED. Analyse the traffic on the DALI bus and look at the times when the message is sent.
If the messages are sent every second or faster, then you need to adjust parameter in the DALI-2 device’s light sensor instance. Follow the next steps to disable that and resolve the problem.
3. Go to the Vertex GUI and select the Devices/Groups tab.
4. Select Settings and using Filters check the DALI-2 multi sensors which are the source of problems (you know that after Node-RED debugging).
5. Select the Change properties option from the Actions panel at the bottom of the GUI.
6. Select the register as Light sensor and select the instance as 2, set the Hysteresis to 0 and check the send checkbox. Then, confirm your changes by clicking Run.
In this picture, you have settings that should be changed: