Door Drive Bus Safety Phase Protocol
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing door drive control systems with digital bus communication struggle to rapidly and reliably report safety-relevant events without disrupting regular data communication, leading to potential delays in responding to danger situations.
Innovation Solution
A cyclic safety phase is reserved within the bus protocol for reporting safety-relevant events, allowing safety components to transmit data without prior prompting, ensuring immediate recognition and maintaining regular bus communication without blocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a safety component interrupts all data communication on the digital data bus to report a safety-relevant event, then the safety event can be recognized without any time delay, but regular data communication between components is blocked and can only be restored after the bus blockage is cancelled
Solution Approach 1:
The data bus communication is segmented into different phases: a safety phase reserved for safety-relevant event reporting and a normal phase for regular data communication. This segmentation allows safety events to be reported immediately during the safety phase without blocking normal communications in other phases, thus resolving the contradiction between fast safety reporting and maintained communication reliability.
2Loss of time
If data is transmitted over the data bus during the safety phase, then a safety-relevant event can be reported immediately, but the specific manner of data transmission and its content becomes significant and complex to manage
Solution Approach 1:
The safety event reporting function is extracted from the normal data communication protocol. During the safety phase, any data transmission is interpreted as a safety event report, simplifying the management rules. The receiving component only needs to detect whether data transmission occurred during the safety phase, without needing to interpret complex transmission manners or content, thus reducing system complexity while maintaining fast response.
Data Source
AI summary
The invention relates to a method of controlling a door drive having a plurality of components which are communicatively connected to one another via a digital bus system, wherein at least one component is a safety component which reports the occurrence of a safety-relevant event over the data bus, and wherein the bus protocol reserves a cyclic safety phase for reporting a safety-relevant event and at least one component recognizes an undefined data transmission during the safety phase as a report of a safety-relevant event.