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Process Calculations

OPCcalc is a vendor-neutral, process calculation framework for OPC Data that allows those with process knowledge to quickly create robust calculations based on real-time and historical process data. Generate engineering, performance, economic, environmental, regulatory compliance, or other calculated results from process inputs.

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Alarms & Notification

Exele’s TopView® software is a powerful yet easy-to-configure alarm management, alarm notification, and remote monitoring tool for process and automation data, databases, system performance & network ping response data.

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Emissions Reporting

PI-DAS provides flexible solutions for your data-intensive, process-related environmental compliance requirements whether they be driven by CFR 40, Parts 60 and 75, Title V with reasons/actions and EDR, MACT, Southern California RECLAIM and/or other similar regulations.

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EXELE is a consulting and software engineering company that provides value added applications used in real-time process control.

We provide software products, consulting, and software engineering for a variety of industries:


Data Center


Food Industry


Water / Waste Water




Oil & Gas








Metals & Mining

Exele's products and services are used to:
Increase reliability - Increase yield - Improve quality - Optimize energy usage
Provide effective alarming and notification - Achieve regulatory compliance
Optimize batch and continuous processing - Improve performance

EXELE is a consulting and software engineering company that provides value added applications used in real-time process control.

We provide software products, consulting, and software engineering for a variety of industries:

  • chemicals


  • food-industry

    Food Industry

  • metal-mining

    Metals & Mining

  • waste-water

    Water / Waste Water

  • data-center

    Data Center

  • Manufacturing


  • power


  • Pharmaceutical


  • oil-gas

    Oil & Gas

News & Updates

  • TopView® version 6.24.0 Release

    TopView Alarm and Notification Software v6.24.0 Release
    Version highlights:
    - Persist run-time user disable actions to configuration file
    - Persist alarm, acknowledge, and disable state during internal restart
    - Comment/annotation user and time
    Read More

  • New Exele PI-DAS RECLAIM System for LA Refinery

    We have recently installed a new PI-DAS RECLAIM environmental monitoring and reporting system in the Los Angeles area. This new installation is at one of the largest refineries in California with over 50 reportable sources. The existing system was approaching end of life and needed to be replaced.
    Read More

  • OPCcalc® and EDICTvb.Net (v.4.3.0)

    Exele Calculation Engines for OPC (DA/HDA) and OSIsoft PI
    Version 4.3 highlights:
    - Visual Studio 2015 and .Net Framework 4.6
    - Missing tag support
    - Completed execution count
    - Equation Server API updates
    Read More

  • Genentech discusses TopView® at PI UC 2015

    At the South San Francisco campus, the Genentech Facilities Data Technologies (FDT) need to address issues of aging facilities, better alarm management, site-wide energy management and other sustainability initiatives.
    Read More

  • TopView VOIP Call-out Alarm Notification

    With VOIP call-out support, TopView can deliver spoken alarm messages to phones over an Ethernet network. Calls are sent via data packets over the network instead of the traditional phone network. From the TopView computer, no copper phone lines or additional physical devices/modems are required.
    Read More

  • Environmental Compliance – Moving Beyond Spreadsheets

    Environmental Compliance - Moving Beyond Spreadsheets Streamlined Part 60 and other CEMS Based Compliance Enforcement of environmental regulations in process facilities with emissions sources is becoming increasingly prevalent.  Compliance is often based on data gathered from continuous emissions monitoring systems, or CEMS.  Penalties and fines associated with violations have made accurate monitoring, calculating, and reporting emissions Read More

  • Using TopView OPC with GE Proficy Historian

    With the 6.20 release of TopView Alarm Management and Alarm Notification Software, TopView can monitor current tag data in the GE Proficy Historian. This allows GE Proficy customers to benefit from the numerous features of TopView including:
    Detection and logging of abnormal events (with optional SQL Server event logging)
    Alarm logic and scripting
    Alarm notification: Audible alarms, Email, SMS/text, Voice callout, and SNMP Traps with alarm acknowlege through Email, SMS, and Voice call-out
    Desktop and Web-based alarm HMI’s
    Scheduled and ad-hoc alarm reporting
    Read More

  • Big data on small screens?

    Big data on small screens? Designing an application for the modern mobile web James Sconfitto, Exele The computer is still young Maybe I sound old saying this, but I remember a world before desktop computers were ubiquitous. When I was a kid, my dad had a Commodore 64 and an old IBM around the house, Read More

  • TopView assists Power Load Balancing in the UK

    Balancing the supply and demand of electricity is a dynamic challenge and a mandatory requirement for electricity providers on the grid. In the UK, Endeco Technologies provides CashBack from National Grid and energy savings from energy bill optimisation. EXELE TopView alarm monitoring and notification software is used as a user facing tool in the Network Operations Read More

  • Free OPC Test Tool update

    OPC Test Tool. The Exele OPC Test Tool can be used to test local and remote OPCDA and OPCHDA. Servers Functions include: OPCDA and OPCHDA Connection/disconnection test (local and remote OPC Servers), OPCDA Tag/item browsing and tag properties. Read current tag/item values, qualities, and timestamps (Cache or Device read). Write tag/item values OPDHDA. Read More


  • “TopView has been a pivotal and robust tool that has contributed to the continued success of the Remote Monitoring Center. Installation, setup and configuration are straightforward with comprehensive embedded documentation and customer support that is second to none. This allows for fast implementation without downtime that would detract from the value of monitoring real time Read More



    RMC Control Systems Specialist
    Mitsubishi Power Systems Americas, Inc

  • We examined a number of options, including email notification, SMS text message notification, voice notification and pager message notification. TopView provides comprehensive features to ensure that notifications reach their intended destination, with configurable retries and alternative contact telephone numbers. All notifications and errors are logged, providing complete visibility of all actions. The flexible configuration, the Read More



    Senior Consultant, Process & Control Systems

  • “TopView” is providing an entirely new spectrum of alarm option for our wastewater treatment plant; e-mail, telephone, text pager and mill radio system. The bulk configuration provides easy set-up of tags, limits, messages delivery options and customizable message text. Exele has provided excellent technical support that has been readily available by telephone.”




  • “I wish I had bought this months before I did. I was attempting to configure another vendor’s software for 2 months and never could get it to do what I wanted. TopView was easy to configure, does more, and ended up costing less. ”



    Evergreen Packaging, Inc.

  • “TopView has added tremendous benefit to our Pawnee power plant by automatically contacting the appropriate personnel for operational alarms, approaching potential problems, and required tasks based on conditions. Besides being easy to install and configure, TopView has improved Pawnee’s availability by warning of events before they get beyond help. This is especially valuable with environmental Read More



    Xcel Energy

  • “We evaluated the available alternatives and found that for process notification and alarm management, “TopView” works best out of the box. Configuration and setup is intuitive and product support is very good. A variety of receiving devices and output formats are available and well integrated. The product is actively being developed to keep pace with Read More



    MWRA (Massachusetts Water Resources Authority)

  • “TopView has paid for itself many times over in our fermentation pilot plant by increasing efficiency and decreasing lost batches. The interface is intuitive and easy to use. Customer support is outstanding. We have even seen some of our suggestions incorporated in updated versions of the software.”



    Igene Biotechnology, Inc.

  • As a crucial part of Flakeboard’s Award winning Energy management System, TopView provides constant monitoring of the networked equipment that feeds data into our system. Device and communication failure reports are automatically generated and mailed to key contacts to address the problem to avoid large loss of data.



    Electrical Systems Coordinator

  • “I realized I needed a way to automatically get notified when something stopped working or was in alarm, so I could begin responding or even correct the problem before it impacted plant operations (or was noticed by plant management). I was told about Exele and the TopView software and with just a couple of quick Read More



    Engineer, NRG Energy

  • “I’ve looked at several OPC alarm systems including the one from our SCADA OEM. The functionality of TopView fulfills all my needs and then some. You guys did a great job!”



    Trent Wind Farm

  • TopView has added tremendous benefit to City of Calgary Water Services by sending Sanitary Lift Stations, Storm Water Lift Stations, and Retention Ponds alarms to Field Services Asset Operations group. TopView has been providing reliable alarm monitoring and notification for the last four years daily on 24 hours. Easy and flexible to configure, scalable, redundancy, Read More



    Control Systems Services Coordinator
    City of Calgary Water Services

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