Field Device Identification Using Wireless Access Tickets
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Solution Overview
Problem
In modern industrial plants, selecting the correct field device for operation among multiple devices with similar signal strength is time-consuming and prone to errors, especially when multiple devices are located in close proximity.
Innovation Solution
A method using digital order tickets with access authorizations to quickly identify field devices by establishing temporary communication connections, transmitting order tickets, and checking access validity, with successful devices signaling their presence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple field devices are located in close proximity and listed by name or signal strength, then the operator unit can display available devices, but the selection process becomes time-consuming and error-prone
Solution Approach 1:
The system performs preliminary actions by automatically establishing temporary communication connections with accessible field devices and validating access authorizations before the user needs to select a device. The operator unit proactively checks which devices the user is authorized to access and pre-processes connection attempts, so that when the user views the device list, the correct device is already identified and ready for selection, eliminating manual searching and reducing selection time.
2Measurement precision
If the operator unit manually searches for the correct field device name in a long list, then the desired device can be found, but the process is time-consuming and prone to errors
Solution Approach 1:
The system implements feedback by having field devices respond to access authorization checks and providing visual signaling feedback to the operator unit. When a field device successfully validates the access authorization from the order ticket, it sends a confirmation signal back to the operator unit, which then highlights or marks that device in the list. This automatic feedback mechanism eliminates manual searching and ensures accurate identification by clearly indicating which device has valid access rights.
3Reliability
If access rights are checked after field device selection, then authorization can be verified, but errors are only detected after selection and connection is rejected
Solution Approach 1:
The system applies preliminary anti-action by performing access authorization validation before the user finalizes device selection. The operator unit establishes temporary communication connections with field devices and validates access rights in advance, identifying which devices the user is authorized to access. This preliminary validation prevents unauthorized connection attempts, eliminating the need for post-selection error detection and avoiding connection rejection delays.
Data Source
AI summary
A method for identifying a field device for automation technology includes providing an operator unit, which includes at least one order ticket with an access authorization for at least one of the field devices. The method also includes searching for accessible field devices with the operator unit using a wireless communications protocol. For each of the field devices accessible from the operator unit, a temporary communication connection between the operator unit and the relevant field deices is established using a wireless communications protocol, the order ticket is transmitted to the relevant field device, the access authorization for validity is checked by the field device, and the field devices that were able to successfully carry out the check for the validity of the access authorization are signaled.