How can process data from mixing plants be integrated into MES/ERP systems?
Integration should not be planned as a direct connection between the mixer and enterprise software, but as a controlled data chain from sensors and control system, via a historian or an edge system, through to the Manufacturing Execution System and Enterprise Resource Planning system. A Manufacturing Execution System, or MES, controls and documents operational production. An Enterprise Resource Planning system, or ERP system, manages orders, materials, inventory, planning and logistics.
Architecture and data model
For batch processes, a structure oriented on ISA-88 is sensible. ISA-88 describes recipes, plant modules, process phases and batch data. ISA-95, or IEC 62264, describes the interface between the production level and the enterprise level. These models help to link process data with batch ID, recipe version, plant, timestamp and process phase.
At the mixer, the control system records relevant values such as weighed-in quantities, mixing time, rotational speed, torque, temperature, moisture, pressure, energy consumption, status, alarms and operator interventions. Only data relevant to process control, quality, traceability, maintenance or key figures should be passed on. High-frequency data, such as vibration or detailed torque profiles, are frequently stored and pre-processed in a historian or edge system. Condensed key figures, trends, events or limit-value violations are then passed to the MES.
Interfaces and data flow
OPC Unified Architecture, or OPC UA, is suitable as a platform-independent standard for secure, structured exchange between control systems, sensors, MES, ERP and cloud applications. OPC UA offers information models as well as functions for authentication, encryption and integrity protection.
Other interfaces have specific roles: PROFINET, EtherNet/IP, Modbus TCP and IO-Link typically connect field devices and control systems. Message Queuing Telemetry Transport, or MQTT, can be useful for event-oriented data transmission or Industrial Internet of Things applications. REST interfaces, short for Representational State Transfer, are frequently used between MES, ERP and integration platforms. In brownfield plants, gateways can convert proprietary or older interfaces into standardised data models. However, these gateways must reliably handle data quality, timestamps, cybersecurity and failure behaviour.
Typically, the ERP system passes production orders, bills of materials, master data and material specifications to the MES. The MES turns these into concrete execution: it provides recipes, coordinates batches, manages process steps and creates electronic batch records. Feedback on actual consumption, quantity produced, scrap, rework, status and quality data flows back from the MES to the ERP. The mixer control system should not be used directly as the leading system for material postings or batch releases.
Batches and compliance
For traceability, raw-material batches, target and actual weighed-in quantities, recipe version, process parameters, times, alarms, deviations, operator interventions and releases must be assigned to a unique end-product batch. An Electronic Batch Record, or EBR, can bring this information together in an electronic batch record.
In regulated applications, user rights, audit trails, electronic signatures, data archiving, backups and readability throughout the retention period must be taken into account. 21 CFR Part 11 is relevant where electronic records or signatures are maintained under other applicable FDA regulations. Exporting data from a PLC (programmable logic controller) is not sufficient; the data chain, including interfaces, time base and correction processes, must be controlled.
Time synchronisation across the control system, historian, MES and ERP is particularly important. Network Time Protocol, or NTP, is often sufficient for batch and OEE evaluations. Precision Time Protocol, or PTP, may be required for higher demands on temporal accuracy. What matters is that deviations are monitored and events from different systems can be correctly correlated.
Security and implementation
Integration should begin with a clear data and interface matrix: which data arise where, which system is authoritative, who may read or write, how are errors detected and how does restart occur after communication failures? Uniform naming conventions for plants, tags, batches and recipes are equally important.
Cybersecurity must be an integral part of the architecture. The security model under IEC 62443 divides industrial automation and control systems into zones with comparable protection requirements and controlled communication paths, known as conduits. MES or ERP access should therefore not reach down to the control level in an uncontrolled way. Network segmentation, restrictive firewall rules, unique user accounts, secure remote access, patch management and controlled changes are central measures.
MES and ERP connectivity at amixon®
amixon® integrates process data project-specifically into the operator's existing automation and IT landscape. The starting point is the User Requirement Specification, or URS. It establishes which data are captured, how they are assigned to a batch and via which interfaces they are passed to the process control system, Manufacturing Execution System or Enterprise Resource Planning system. A Manufacturing Execution System, or MES, supports production control and batch documentation; an Enterprise Resource Planning system, or ERP system, manages, among other things, orders, materials and logistics.
The mixing plant can be equipped with a programmable logic controller, or PLC. Recipes with mixing time, rotational speed, dosing sequence, temperature profile and further parameters can be executed there on a batch basis. Depending on the mixing task, torque, temperature, moisture, pressure, vacuum, dosing quantities, run times, cycles, alarm messages and operator interventions, among other things, can be recorded. amixon® does not fix the data scope as a rigid standard package but matches it to the process, product, quality requirement and existing system landscape.
Barcode-supported identification can link raw materials, containers, recipe versions and production batches. This makes target and actual values, batch numbers and selected process data available for traceability, electronic batch records and OEE evaluations. Overall Equipment Effectiveness, or OEE, assesses availability, performance and quality. Its meaningfulness requires that timestamps, downtime reasons, batch assignment and data ownership are clearly regulated across all systems involved.
In regulated applications, amixon® can align the automation with the requirements for documentation, user roles, audit trails and electronic data. amixon® supports Design Qualification, Installation Qualification and Operational Qualification, or DQ, IQ and OQ. According to the company, documentation and execution can be aligned with EU GMP and FDA 21 CFR Part 11. Responsibility for the validation of the complete data chain, for data integrity and for regulatory release remains with the operator.
Operating data from the mixer can also support condition-based maintenance. Run times, switching cycles, torque profiles, motor current, temperature and faults can indicate changes to the drive, bearings, seals or discharge elements. amixon® combines this data basis with maintenance-friendly design, including a mixing tool mounted above the mixing chamber. Whether predictive maintenance makes sense depends on measurable failure mechanisms, data quality and the operator's maintenance organisation.
The technical design of the data capture can be prepared in the pilot plant with the original product. According to amixon®, more than 35 test units are available in Paderborn; supplementary pilot plants exist in the USA and several countries in Asia. Trials can show which process variables are relevant for mixing quality, product protection, energy input, discharge or cleanability. They thereby provide a basis for selecting suitable sensor technology and structuring recipe and process data.
amixon® states that it develops and manufactures centrally in Paderborn. The high depth of manufacture facilitates the coordination of mixer, sensor nozzles, automation, documentation and later retrofits. Maintenance, modernisation, spare-parts supply and project-specific interface adaptations can be accompanied over the plant life cycle.