Process Data Communications with the Antaris FT-NIR Analyzers – Analog, Digital, OPC and LIMS

Significance of the topic

Near-infrared Fourier transform spectroscopy (FT-NIR) is increasingly used for real-time, in-line monitoring of chemical and physical properties in manufacturing. Integrating FT-NIR analyzers into process control and information systems enables immediate feed-forward and feedback actions that improve yield, ensure product quality and shorten response times to out-of-spec events. Practical requirements for such integration include reliable analog and digital I/O, standardized digital communication (OPC), and archival/enterprise interfacing (LIMS). The Thermo Scientific Antaris FT-NIR family with RESULT software exemplifies a solution that addresses these demands with configurable workflows and multiple communication protocols.

Objectives and overview of the technical note

The technical note documents methods for integrating Antaris FT-NIR process analyzers with process control systems and information management platforms. The primary objectives are to describe:

• How RESULT software implements OPC server functionality and workflow-based reporting.
• How analog and digital I/O are handled through the Antaris Process Communication Controller for PLC integration.
• How measurement data and events can be exchanged bi-directionally with LIMS and supervisory systems.

Case examples and workflow constructs are used to illustrate typical process loop implementations and use cases such as endpoint detection, in-line concentration reporting and alarm signaling.

Methodology and workflow architecture

The approach centers on RESULT software, which orchestrates instrument control, chemometric evaluation and communications via configurable workflow events. Key architectural elements include:

• Instrument acquisition: Antaris MX/EX FT-NIR analyzers acquire spectra in-line (e.g., via fiber-optic probes).
• Chemometric quantification: Spectra are processed by PLS or other calibration models within RESULT to produce scalar values (concentrations, ratios, pass/fail decisions).
• Workflow events: RESULT supports modular events such as Report to OPC, Write to IO, Read from IO, Report/Report to Text and Request, enabling automated reporting and two-way exchanges.
• OPC server/client model: RESULT can act as an OPC server; clients (process control/SCADA) subscribe to reported tags using standard DCOM over Ethernet.
• Analog/digital I/O: Antaris Process Communication Controller provides channelized 4-20 mA analog outputs and digital channels for binary signals (e.g., PASS/FAIL, alarms), wired to PLC or local indicators.
• LIMS interfacing: RESULT can export delimited text or HTML reports for LIMS ingestion and can import sample or job information via the Request event.

These modular operations permit deterministic, repeatable automation without custom programming other than configuring the workflow and mapping tags/channels.

Instrumentation used

The hardware and software components used and discussed in the note are:

• Antaris EX and Antaris MX FT-NIR Process Analyzers (Thermo Scientific).
• Thermo Scientific RESULT software—workflow engine, chemometric processing and OPC server capability.
• Antaris Process Communication Controller—Ethernet-linked controller with configurable analog and digital I/O modules for PLC-level wiring.
• Industry-standard networks and protocols—Ethernet, DCOM for OPC, optional XML over TCP/IP for remote connectivity.

Examples also reference conventional PLCs, analog gauges (4-20 mA), alarm indicators, and LIMS systems used for archival and downstream data handling.

Main results and discussion

The technical note demonstrates several practical outcomes from integrating Antaris FT-NIR analyzers into process environments:

• Seamless OPC integration: RESULT functioning as an OPC server enables standardized tag-based reporting to any OPC client, minimizing bespoke integration work.
• Configurable workflows: Users can build deterministic sequences that perform acquisition, chemometric evaluation and conditional reporting (e.g., send concentration to OPC, write analog output, trigger digital alarm) with no programming required.
• Analog and digital outputs: The Antaris controller maps chemometric outputs to analog (e.g., 4-20 mA) or digital channels facilitating local displays, PLC logic and actuator control (valves, solenoids).
• LIMS compatibility: RESULT can generate reports (HTML or delimited text) consumable by LIMS and can ingest job/sample metadata to support two-way process integration.
• Two-way control: Workflows can accept commands from clients enabling remote triggering of analyses or changing operational states.

These capabilities allow FT-NIR data to be used both for direct local control (fast corrective actions) and for enterprise-level process monitoring and archival. The note emphasizes flexibility: networks may be local or remote, and RESULT’s modular events can be tailored to different automation schemes.

Benefits and practical applications

Integrating FT-NIR with RESULT and the Antaris controller yields several practical advantages:

• Reduced integration complexity via OPC and prebuilt workflow events, lowering implementation time and engineering effort.
• Real-time decision support: Immediate pass/fail signaling and analog concentration outputs support closed-loop control and local operator awareness.
• Improved traceability: LIMS reporting and file-based archival allow long-term trending, root-cause analysis and regulatory compliance.
• Scalability: Ethernet/OPC and modular controller I/O permit connection to existing PLC infrastructure or newer process control systems.
• Operator independence: Workflow-driven automation ensures consistent execution regardless of operator variability.

Representative use cases cited include reaction endpoint detection in chemical manufacturing, quality control for polymer production and moisture measurement in pharmaceutical solid dosage forms.

Future trends and potential applications

Emerging directions that build on the presented integration approach include:

• Industry 4.0 convergence: Tighter coupling between FT-NIR analyzers, historians and advanced analytics platforms (cloud or edge) for predictive process control and continuous improvement.
• Enhanced cybersecurity and remote access: Secure OPC UA adoption and hardened communication channels enabling safe remote monitoring and troubleshooting.
• Advanced chemometrics and ML: On-line model adaptation, transfer learning and multivariate monitoring that reduce calibration maintenance and improve robustness across scale-up.
• Standardized data models: Broader use of self-describing metadata and semantic standards to ease interoperability among instruments, MES, LIMS and historians.
• Edge computing: Localized preprocessing and decision-making at the analyzer/controller to reduce network load and latency for critical control loops.

These trends will further enable FT-NIR to be a core element of autonomous, data-driven manufacturing systems.

Conclusion

The technical note shows that Antaris FT-NIR analyzers combined with RESULT software and the Antaris Process Communication Controller offer a practical, flexible solution for integrating spectral measurements into industrial process control and information systems. Through OPC, analog/digital I/O and LIMS interfaces, FT-NIR data can be delivered where it is needed—in real time for process control or to centralized historians for archival and analysis—without extensive custom coding. This reduces deployment time, supports regulatory and QA needs, and enables improved process understanding and control.

Reference

Technical Note 51241: Process Data Communications with the Antaris FT-NIR Analyzers – Analog, Digital, OPC and LIMS, Michelle A. Pressler, Ph.D., Jeffrey Hirsch, Ph.D., Thermo Fisher Scientific, Madison, WI, USA, Thermo Fisher Scientific technical note (2006, 2008).