PLC-Guided Machine Commissioning With Block Status Tracking
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Solution Overview
Problem
Current commissioning processes for complex machines in filling and packaging plants are prone to errors due to reliance on operator experience and lack of systematic logging, leading to potential safety issues and inefficiencies.
Innovation Solution
Implementing a programmable logic controller (PLC) with an input/output unit and edge device to manage a commissioning status flag (IBN flag) that tracks block operation, allowing for automated action instructions and documentation through a server, enabling operator-guided commissioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If commissioning is carried out based on operator experience, then the process can be completed quickly, but deviations from manufacturer recommendations occur and safety-related steps may be overlooked
Solution Approach 1:
The patent implements pre-defined commissioning sequences and checklists that are prepared in advance based on manufacturer recommendations. These sequences are stored in the control system and automatically guide operators through the commissioning process, ensuring that all necessary steps are covered before commissioning begins.
Solution Approach 2:
The system provides real-time feedback to operators during commissioning by comparing actual commissioning status against the predefined sequences. The control system monitors completion of each step and alerts operators to any deviations or missing actions, ensuring adherence to manufacturer recommendations throughout the process.
2Reliability
If extensive testing is performed to ensure proper installation and wiring, then commissioning reliability improves, but time consumption increases
Solution Approach 1:
The control system performs preliminary self-diagnostics and automated tests before formal commissioning begins. These preliminary actions include checking I/O configurations, verifying wiring integrity, and testing basic functionality, which reduces the extent of manual testing required later while maintaining high reliability.
Solution Approach 2:
The system enables self-testing capabilities where the control system automatically verifies its own configuration and functionality. The PLC and HMI perform automated checks of I/O modules, communication paths, and control logic without requiring extensive manual intervention, thereby reducing commissioning time while ensuring thorough testing.
3Loss of information
If detailed logging of the commissioning process is implemented, then traceability and error diagnosis improve, but system complexity increases
Solution Approach 1:
The logging functionality is merged with the existing HMI and control system infrastructure. Commissioning data is logged using the same communication protocols and data storage mechanisms already present in the system, avoiding the need for separate logging hardware or complex additional systems. The log data is integrated into the existing database structure of the control system.
4Productivity
If multiple commissioning engineers work simultaneously on different blocks, then commissioning productivity increases, but coordination complexity and potential duplication of work increase
Solution Approach 1:
The commissioning process is segmented into distinct blocks or modules, each with its own status tracking. The control system divides the overall commissioning task into manageable segments that can be independently assigned to different engineers. Each block has a unique identifier and status flag, allowing parallel work without interference while maintaining overall coordination through the centralized HMI interface.
Data Source
AI summary
The disclosure relates to a machine and a method for operator-guided commissioning of the machine, in particular a machine in a machine line for filling and packaging food and/or beverages. The disclosure reads out a commissioning status for blocks in a programmable logic controller of the machine. The commissioning status of a block is stored in the PLC and indicates whether or not the block has already been put into operation. The commissioning status for the block is transferred to a server and, if the commissioning status indicates that the block has not yet been put into operation, one or more action instructions are received from the server. The received action instruction can be output to a user. The commissioning status for the block is changed in the PLC based on a user action.