DALI Short Address Reallocation for Duplicate Slave Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In lighting systems using a digital addressable lighting interface (DALI), conflicts arise when a newly accessing slave device has a duplicated short address, leading to instruction sending failures and loss of configuration information during existing address reallocation methods.
Innovation Solution
A control device and method that scans and reallocates short addresses, distinguishing between new and old devices by comparing random addresses, reallocating only for new devices while preserving configuration information for old devices, using a control device with units for scanning, allocation, and duplicate address management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If short address reallocation is performed for all slave devices, then address conflicts are resolved, but configuration information is lost
Solution Approach 1:
The patent applies local quality by differentiating between new and old slave devices through random address comparison. Instead of uniformly reallocation for all devices, the system selectively reallocation only for new devices (those with random addresses not in the device list) while preserving configuration information for old devices (those with random addresses already in the device list). This targeted approach resolves address conflicts without unnecessary information loss.
2Loss of information
If duplicate short addresses are not reallocated, then configuration information is preserved, but instruction sending fails
Solution Approach 1:
The system applies local quality by selectively reallocation duplicate short addresses only for new slave devices while preserving them for old devices. The random address comparison enables the system to identify which devices need reallocation (new devices with duplicate addresses causing instruction failures) and which should retain their addresses (old devices with valid configurations).
Solution Approach 2:
The patent performs preliminary action by comparing random addresses against the device list before reallocation. This preliminary check identifies new devices that require reallocation, allowing the system to proactively resolve address conflicts before they cause instruction sending failures, while avoiding unnecessary reallocation for old devices.
3Reliability
If all slave devices are scanned and reallocated, then address conflicts are resolved, but system complexity increases
Solution Approach 1:
The patent performs preliminary action by comparing random addresses against the device list before reallocation. This preliminary check identifies new devices that require reallocation, allowing the system to proactively resolve address conflicts before they cause instruction sending failures, while avoiding unnecessary reallocation for old devices.
Solution Approach 2:
The system applies local quality by selectively reallocation duplicate short addresses only for new slave devices while preserving them for old devices. The random address comparison enables the system to identify which devices need reallocation (new devices with duplicate addresses causing instruction failures) and which should retain their addresses (old devices with valid configurations).
Data Source
AI summary
The present disclosure discloses a control method, a control device and a lighting system. The method includes: sequentially scanning short addresses of all slave devices accessing the master device; allocating a short address to a slave device that does not have a short address; and reallocating a duplicate short address determined in a process of sequentially scanning the short addresses of all the slave devices accessing the master device.