Industrial Slave Network Enrollment via Commissioning Signal Addressing
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Solution Overview
Problem
Existing wired communication networks require manual assignment of addresses to slave devices, which is prone to errors and requires operator expertise, and there is a need for flexible scaling of slave devices in industrial applications.
Innovation Solution
A master device initiates an enrollment process using a commissioning signal to automatically assign unique addresses to slave devices through a Daisy chain configuration, utilizing a commission line and field bus line for enrollment and address configuration frames, with the ability to detect and troubleshoot faulty devices and integrate new modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual address assignment is used for slave devices, then operator control and device configuration is achieved, but the process is time-consuming, error-prone and requires operator expertise
Solution Approach 1:
The slave devices automatically assign addresses to themselves by detecting their position in the daisy chain through the commissioning signal propagation. Each slave device determines its address based on how many commissioning signals it receives before detecting a fault or end of chain, eliminating the need for manual operator intervention in address assignment.
Solution Approach 2:
The system performs preliminary fault detection and chain mapping during the commissioning phase before normal operation begins. The master device sends commissioning signals through the daisy chain to establish address assignments and detect faults in advance, so that the system is ready for operation without requiring subsequent manual configuration.
2Reliability
If manual address assignment is used for slave devices, then operator control is maintained, but operator expertise is required and input errors occur
Solution Approach 1:
Slave devices autonomously determine their own addresses by counting commissioning signals received during the commissioning phase, eliminating human error in address entry. The automatic self-configuration ensures accurate address assignment without requiring operator expertise or manual input.
3Adaptability or versatility
If the system uses fixed slave device deployment, then system stability is maintained, but flexibility for scaling up or down is limited
Solution Approach 1:
The system dynamically adapts to changes in the number of slave devices through automatic commissioning. When slave devices are added or removed from the daisy chain, the master device automatically sends new commissioning signals to re-establish address assignments, allowing the system to scale flexibly while maintaining operational stability through automated reconfiguration.
Solution Approach 2:
The commissioning signal propagation provides feedback about the current state of the daisy chain, allowing the system to automatically detect changes in device count and reconfigure addresses accordingly. This feedback mechanism enables the system to adapt to scaling while maintaining reliability through automated detection and reconfiguration.
Data Source
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AI summary
For configuring slave devices in a communication system comprising a master device (MD) and slave devices (SD), wherein the master device and the slave devices are connected in chain via a commission line (CL) and in parallel via a field bus line (FBL), wherein each slave device is indexed by an index greater than or equal to 1, the slave device of index 1 being connected to the master device, wherein, to enroll the slave device of index k, k being equal to or greater than 1, the master device is able to: send (2), in broadcast via the field bus line (FBL), an address configuration frame containing instructions for address configuration with a defined address (Add_k) of index k for the slave device of index k, send (S3), in broadcast via the field bus line (FBL), a request for device information, the request containing the defined address (Add_k), send (S4), in broadcast via the field bus line (FBL) after having received a reply containing device information and the defined address (Add_k), a command for sending a commissioning signal via the commission line (CL) to the slave device of index k+1, the command containing the defined address (Add_k), store (S5) the received device information in an information table, the device information containing an identifier of the slave device of index k and a type of the slave device of index k, wherein the slave devices have a common default address before being enrolled and only a slave device of index k, which has the common default address and detects a commissioning signal on the commission line (CL), accepts the address configuration frame to change the common default address of the slave device of index k to the defined address.