IIoT & Digital Transformation Forum - Recent Threads

OPC UA Concurrent Session Expectations in Production

Franz Valmonte — Thu, 12 Feb 2026 06:28:28 GMT

Hi all,

We are currently benchmarking OPC UA performance for the DeltaV Edge Environment. Since OPC UA is one of the supported data egress interfaces on DeltaV Edge, we are evaluating how many concurrent OPC UA sessions can be supported while maintaining optimal system performance.

To help guide our benchmarking assumptions, could you share:
How many concurrent OPC UA client sessions you typically run in production?
What types of clients are connected, for example historians, analytics platforms, dashboards, or custom applications?
Whether you have experienced any performance constraints tied to session count or monitored items?

Our goal is to align our internal performance targets with real-world deployment patterns. Appreciate any input you can provide.

VMware ESXi Versions in Use for Plant or Corporate Virtualization

Franz Valmonte — Thu, 12 Feb 2026 06:17:54 GMT

Hi Everyone,

We are evaluating support for deploying DeltaV Edge on a virtual machine, rather than requiring a dedicated Dell R660xs server. As part of this effort, we are starting qualification with VMware ESXi as the hypervisor.

To help us scope and prioritize validation, could you share:

What version of VMware ESXi you are currently running in production?
Whether that ESXi host is located within the plant environment or in a centralized corporate datacenter / cloud?
Who manages it, plant OT/IT or corporate IT?
Any plans to upgrade within the next 12 months, particularly to ESXi 9.0?

Our assumption is that many environments are currently on ESXi 8.0, but we want to validate this before finalizing our qualification approach.

Appreciate any input you can provide.

Initializing a Cascade across a DeltaV OPC UA Server

SteveB — Thu, 20 Feb 2025 16:29:34 GMT

Hi,

I want to create a traditional cascade between a server-based app and a DeltaV Regulator (e.g. PID). I am not that familiar with DeltaV or OPC UA so wanted to see if anyone could offer guidance.

To initialize a cascade between two DeltaV Regulators requires a secondary to send a BKCAL InitReq and BKCAL Value to its primary in the form of an 8-bit status word (ST) and a floating point value (CV). It seems as if the CV and ST must be coupled during transmission between two DeltaV regulators because the secondary's ST requests initialization, and the CV sent along with it contains an initial value for the primary's OUT parameter - to ensure bumpless transfer.

However, if one were to establish a cascade ACROSS a DeltaV OPC UA server, then it seems as if this InitReq/Value coupling is lost as both appear as separate and independent values in the OPC UA server. The concern here is that if a server-based app reads an BKCAL InitReq, but for whatever reason the BKCAL value has yet to update, then the server-based primary might initialize its OUT to a stale value (maybe only slightly old, but that lack of determinism could be problematic).

The traditional way that third-party app providers have solved this problem seems to be reading up the DeltaV regulator SP every cycle and then incrementing it before writing it back down, but I was wondering if there might be a more elegant solution where initialization only occurs when the cascade is closed.

So my question is: Is there a way to ensure that the correct BKCAL value is read from a DeltaV OPC UA server along with a BKCAL InitReq? I have thought of reading the InitReq first (ST) and then going back for the Value (CV), but I imagine that there are edge cases where the result is not deterministic. My back-up plan is just to initialize every execution cycle. Thanks.

Rosemount 1420 firmware Upgrade from 3.9 to 4.8

Cesar Marquez — Fri, 10 Jan 2025 13:16:44 GMT

Best regards, I have a problem with a 1420 since it has firmware 3.9 and only accepts tls 1.0 connections to be managed, and this has been deprecated by almost all browsers. I thought about updating it to the latest version, however I don't see a procedure to do so since the guide is made for firmwares 4.5 onwards. Is it possible to update a 1420 from version 3 to 4? MODEL:1420A3A3AN6WL2. greetings.

RE: Rosemount 1420 firmware Upgrade from 3.9 to 4.8

Steve Ward — Fri, 10 Jan 2025 13:25:58 GMT

This product is obsolete, see www.emerson.com/.../emerson-sku-wireless-1420-gateway. Please contact your Emerson representative for further advice.

SIS CHANNEL

shouy — Thu, 23 Feb 2023 05:41:19 GMT

does anyone know why Emerson limit the "Only 48 of the 96 LS CHARM slots can be configured as output LS CHARMs"?

SIS NET Repeater Link Status BAD

Ravi Chandra Penumarti — Sat, 07 Aug 2021 11:24:00 GMT

Hi Everyone

SIS NET Repeater with Hardware rev 9.18 and Software revision 2.1 are installed in our SIS Network. Under Repeater diagnostics - Repeater Connection List we found Link Status as BAD. All the parameters under diagnostics of individual repeaters is GOOD. Please suggest the probable cause.

Thank You

RE: SIS NET Repeater Link Status BAD

Ravi Chandra Penumarti — Fri, 25 Nov 2022 11:56:12 GMT

At last found the problem. Global Slot no 63 should be free. For publishing global parameters over SISNET network we should use global slots from 31 to 62 only. Once SLS publishing as global slot 63 is de-commissioned, link status became good in diagnostics.

Lotus Notes to Office 365 Migration Tool || Step-by-Step Guide

divyachauhan — Fri, 25 Nov 2022 08:06:42 GMT

Nowadays Lotus Notes came along with many drawbacks like as not being cost-effective, difficulty to maintain data consistency, et cetera, and because of these reasons users want to switch their Lotus Notes accounts to another emailing platform. Office 365 is the best platform to replace it with Lotus Notes. There are two ways to conduct the migration task; manual or professional is that two ways. Through manual method, users get uncertain data and the whole process is time-consuming as well. Moreover, using professional third-party tools like Shoviv Lotus Notes to Office 365 Migration Tool, users can effectively execute the task of migration from Lotus Notes to Office 365.

It can migrate multiple Lotus Notes files into Office 365 at a time without affecting the speed of the outcome. This tool maintains data integrity and folder hierarchy at the same time. It includes advanced features like incremental export, which helps to resume the task from the last ended point and prevent your data from duplicity. With the help of its filter option, users can filter desired items according to their choice. It can export Lotus Notes files into PST, EML, MSG, and HTML file formats. Users can download its free trial version to know its full working and functionality without investing in it.

virtual SZ & CSLS in SIS internal FAT

shouy — Mon, 21 Nov 2022 02:48:13 GMT

does anyone tall me how to use the Virtual CSLS tool with in my FAT system ,where can I download the "DeltaV Virtual studio" and open the studio?

SIS_PDS_Virtual_DeltaVSIS.pdf

1420 GW homepage does not load

AfzalSJ — Wed, 13 Apr 2022 23:57:42 GMT

Hi All,

A 1420 DVready gateway does not load the homepage completely. It gets stuck on the Emerson banner and goes no further.

Tried resetting with #2 dip-switch multiple times but no change. Also tried on both primary and secondary DV IP addresses and multiple browsers/machines.

I am unable to use this GW at all. Would appreciate any support please. Thank you and Regards.

RE: 1420 GW homepage does not load

Frances Tracy Pasicolan — Tue, 26 Apr 2022 11:55:56 GMT

Hi, ASJ,

Please submit your technical concern here: https://emr.sn/gc0abu0 so a local Emerson representative will contact you for technical support.

Thank you!

RE: SIS NET Repeater Link Status BAD

Ravi Chandra Penumarti — Thu, 02 Dec 2021 09:41:29 GMT

Thank you for your suggestion. We will inspect the same in plant shutdown.

RE: SIS NET Repeater Link Status BAD

Spencer wang — Wed, 03 Nov 2021 08:16:27 GMT

The terminal resistance of the coaxial cable on the Extender next to repeater was not connected or not properly.

RE: SIS NET Repeater Link Status BAD

Spencer wang — Wed, 03 Nov 2021 08:16:19 GMT

The terminal resistance of the coaxial cable on the Extender next to repeater was not connected or not properly.

RE: IC694PWR330 indicator sequence changed?

Jack.Zhang — Tue, 28 Sep 2021 08:39:55 GMT

Thank you Steve. Yes, I asked the customer to return the problematic module to me and started eRMA.

IC694PWR330 indicator sequence changed?

Jack.Zhang — Sun, 26 Sep 2021 04:15:41 GMT

Just look at the picture！

RE: IC694PWR330 indicator sequence changed?

Steve Ward — Mon, 27 Sep 2021 09:03:13 GMT

The one on the right is correct (green LED at the top). Green LED is used for normal conditions, the RED LED is used for fail situations. In legacy systems the red LED was used for battery status. If the customer is concerned they can raise a case on technical support and/or return the power supply under eRMA.

Changing Registers Sequence ModBus

Dmitrii Kapitonov — Thu, 09 Sep 2021 06:37:46 GMT

Hi there!

DeltaV 13.3.1

I'm using a device having a non-standard Modbus register sequence, I need to get Float Value. Assume there is temperature 61.2°С It means registers I must receive are 250 204 116 66, but the used device has register sequence such as 116 66 250 204, so I have to change the register sequence. Currently I get incorrect value such as -4.234+012 or similar. After describing problem, I have two ways for solution.

First, I can change the sequence using custom FB in ControlStudio and receive two16bit integer instead of float, example at the picture below. This way is easier for me, but I want to find more flexible way to solve the problem without using additional FB.

Second, I can reconfigure Standard SI Module to programmable SI Module and use SampleCustomProtocol ModBus by Mynah , I hope someone used it somewhen, but I have a problem when I full textbox up in the Special Data Tab the necessary value as sown at the picture below and download ProgSI Module, Registers don't change sequence. Maybe someone can help me to find a way to solve the problem.

If someone knows others ways to change registers sequence, I'll be glad to read them.

Thanks!

Communication of DeltaV Database like Event Chronicle with External BigData

Hassan Akhtar — Sat, 13 Feb 2021 07:05:18 GMT

I am trying to link up DeltaV Database with our BigData service out of DeltaV system. I think DeltaV continous historican is not a structured database therefore we can only access within DeltaV System. But DeltaV e Event Chronicle is somehow available out of DeltaV system. What you people think about the DeltaV database while comparing with other Distributed Database systems? Because in smart industrial system databases are being connected with central BigData systems.

RE: Communication of DeltaV Database like Event Chronicle with External BigData

hasit_patel — Mon, 15 Feb 2021 19:22:56 GMT

Hi Hassan, you can use our Optics Data Lake to collect and contextualize data from DeltaV's. Data Lake will interface to DeltaV and bring process variables (OPC-DA), Event Journal (OPC A&E), Historian (OPC-HDA) and batch (Web services or ODBC). Contextualization could be using industry standard data models like ISA/S95. It can also bring data from other OT sources like SCADA, PLC's, Asset health, AMS-Device Manager, etc, as well. Would be glad to discuss more details with you. More info on our web site at: www.emerson.com/.../data-lake-and-historian.
www.emerson.com/.../product-data-sheet-plantweb-optics-data-lake-plantweb-en-7191562.pdf

RE: Profibus Communication Between Delta V Controller and Siemens S7 300 CPU

Leo Mennen — Sun, 11 Oct 2020 10:00:30 GMT

use an Profibus DP to DP gateway, that is the most easy way to get this to work

Profibus Communication Between Delta V Controller and Siemens S7 300 CPU

Goktug Duman — Sun, 11 Oct 2020 06:40:36 GMT

Hi,
I want to make a profibus connection between CPU 315-2DP and a Emerson Delta V controller and read data from S7 system. I installed a Profibus DP card to emerson system and it is master as default ithink. So CPU 315 must be slave i think. I installed gsd file of CPU315 to emerson system. But I couldn't establish the connection. Can anyone tell me how to make the connection? I made the adjustments on emerson, like gsd file, creating device, port, channel, baud-rate etc. But I dont know what to make on siemens side. Is there anything to do on siemens side?

5 competencies of digital transformation

Emerson Exchange News — Wed, 25 Sep 2019 00:06:19 GMT

Jim Montague

Responding to floods, earthquakes or other natural disasters requires everyone to pitch in and help. This all-hands-on-deck approach is also needed to handle most upheavals or other huge changes, including successfully achieving digital transformation in process control and automation applications. These epic challenges are likewise where neighbors, responders and other partners can provide the most assistance and value, which is why Emerson unveiled its Digital Transformation business at Emerson Global Users Exchange 2019 in Nashville, Tennessee.

"There's a lot of hype and confusion surrounding digital transformation, its impact and how it's progressing. People want to know what's real and how to get started. They need clarification to develop practical solutions, so we define digital transformation as smart, connected technologies used to solve problems, usually involving changes in business practices," said Stuart Harris, group president, digital transformation with Emerson’s Automation Solutions business. "Digital transformation must be guided by specific problems, but it won't work unless people are engaged and appropriate technologies are adopted."

Harris reported the five essential competencies of digital transformation that can unlock performance and enable employees to perform at their best. They include automated workflows, decision support, workforce upskilling, mobility and change management. Meanwhile, the three critical success factors of digital transformation are technology decisions driven by business outcomes; scalable approach, guided by vision, instead of doing it all at once; and technology investments that are also seen as investments in people.

"However, we're still at a critical stage because, even though many companies have gained the vision to pursue digital transformations, they don't know where to start and can get frustrated," added Harris. "Other companies are doing pilot programs, and some are seeing early benefits, but everyone needs to connect their businesses and digital transformation strategies with practical applications. Strategy and business cases are what come first with digital transformation—not the technology. Once return on investment (ROI) is captured for a solution, it can be scaled across the whole enterprise."

Combined tools = easier digitalization

The $650-million Digital Transformation business consists of a dedicated organization focused on related, digitalized technologies and programs, and it brings together resources to help manufacturers develop and implement practical digital-transformation strategies and achieve industry-leading or top-quartile performance and measurable results. It also includes:

operational certainty consulting with facility- and enterprise-level roadmap strategies and implementation to improve reliability, safety, production and energy utilization metrics
operational analytics with a comprehensive portfolio of predictive diagnostics and advanced analytics, providing insights on health and performance of operational assets
industry solutions with deep, industry-specific expertise on solutions to drive key performance indicators
pervasive sensing with the industry’s largest portfolio of smart, easy-to-deploy, connected devices, including wireless instruments
project management with best practices, tools and resources to confidently implement digital-transformation projects.

Harris reported users can employ Emerson's digital transformation capabilities to accomplish projects, such as reliability of equipment and systems, process safety, production optimization, energy monitoring, maintenance, corrosion monitoring and others. "Our Digital Transformation business provides customers with the engineering and solutions to solve known problems," explained Harris. "The initial problem for many users is they try to take a big-bang approach to digital transformation that tries to solve everything at once, invest in technology without considering specific problems or objectives first and often end up lacking ROI and becoming frustrated."

Pilots help scale-ups take off

Once digital-transformation initiatives define their problems/solutions and goals, they must develop proofs of concept and pilot projects that can demonstrate some of that much-needed ROI, Harris reported. This not only encourages further commitment and investment, but helps participants to scale up their solutions to many more applications that can achieve similar advantages and benefits.

"Many digital transformation pilots can get started for $50,000 to $100,000 in one or a few processes, prove themselves and then scale up to many processes and save millions or tens of millions of dollars," said Harris. "Emerson benchmarks many industries, and we've learned that digital transformation is urgent because it can help users achieve top-quartile performance, add two weeks of uptime, cut maintenance incidents in half or reduce safety incidents by 30%."

“Digital transformation is urgent because it can help users achieve top-quartile performance, add two weeks of uptime, cut maintenance incidents in half or reduce safety incidents by 30%." Emerson’s Stuart Harris explains the benefits of digital transformation at Emerson Global Users Exchange.

People crucial to transformation

Beyond specifying problems, goals and technologies, digital transformation can't happen without the deep and continuous engagement of people, especially those on the plant floor, Harris explained. "Executive support is essential, and IT has to be involved; but it's most important for the operations folks to be engaged because they have the domain knowledge about where it's best to apply digital transformation," he added. "Every functional group can contribute and take on new roles. They can serve as bridges connecting lines of stakeholders or develop internal academies to train colleagues how to use new analytics tools. We provide technical resources and curriculum development to more than 350 educational institutions to help people develop the skills that employers need.

"Customers are looking for a partner that can help them on their digital-transformation journeys, and establishing our Digital Transformation business puts Emerson in a better position to be that credible partner that can help customers achieve measurable business impacts."

RE: 5 competencies of digital transformation

Jonas Berge — Sat, 19 Sep 2020 13:33:43 GMT

Think Big, but Start Small, to Scale Fast. World Economic Forum / McKinsey found Digital Transformation as multiple small projects (not a big bang) is the fastest way to scale across the plant.

I have also found that starting with the existing historian platform, ready-made software, established I&C standards, and the NAMUR Open Architecture (NOA) helps accelerate digital transformation. Then you scale out the data platform and application framework from there.

Learn how plants that are successful digitizing are doing their digitalization from this essay:
www.linkedin.com/.../