OPC UA is a platform, vendor, and language independent technology that can be used at all levels of an organization. It helps to set up secure, standardized, and high-performance communication channels across the enterprise. The open architecture design supports a wide range of hardware and software applications from different vendors, thus ensuring enterprise wide interoperability. OPC UA enables implementation of IIoT and AI-based solutions to bring your organization into the industrial 4.0 fold.

Utthunga offers comprehensive and standardized OPC UA application development services for process/factory/power/building domains, machine builders, and industrial software companies. Our OPC UA Stack is specifically platform independent, minimizes development cost, time to market and bill of materials cost for OEMs and end users who want to add OPC UA Server functionality to their products.

Why OPC UA application development is essential for industries?

Industries, irrespective of their domain, are aggressively adopting OPC UA Stack applications for industrial interoperability. Some of the ways in which industries benefit from using OPC UA based solutions are:

  • The standardized interface enables easy OPC UA integration and enterprise-wide data visibility and access
  • Secured and direct communication across all automation levels
  • When used with industry communication protocols like HART, Modbus, Ethernet/IP, PROFIBUS, PROFINET, etc, OPC UA integration enables easy integration of legacy systems into mainstream
  • Allows for contextual interpretation of data at each layer from shop floor to enterprise level

OPC UA Application Development Services Provided by Utthunga

Our enterprise-ready and IoT friendly OPC suite helps you realize state-of-the-art solutions for OPC-based data sharing, tailored to individual requirements, both in brownfield applications and new systems.

Our OPC UA StackApplication Development services include:

  • Mobile/Tablet HMI application development
  • OPC UA integration with production, operations, and enterprise applications
  • Connectivity to varied database
  • Comprehensive set of functionalities, including Extended Security, Data Access, Complex Data, Events, Alarms & Conditions and Historical Access
  • FDT/FDI Host integration with OPC
  • FDI Communication Server integration to host system

The OPC UA integration process for an enterprise includes the following steps:

Step 1: Building the Initial framework

Our team will work with you closely to define the project scope, plan budget, and establish the timeline. Once all the details are finalized, we will sign on the project. 

Step 2: Planning and Design

We will do a feasibility study and plan the project. We will also develop strategies that are tailored to your business requirements and goals. Quality assurance is designed as an integral part of every step of the development process.

Step 3: Implementation

During the implementation process, we will conduct regular review meetings to assess the project development. Our experts will also do risk assessment and mitigation simultaneously.

Step 4: Project Closure

The final step of our OPC application development process is project closure and handover. We will also take care of maintenance and support.

opc ua integration

Why Utthunga for OPC UA Enterprise Integration?

Utthunga can be your trusted partner in digital transformation using OPC UA solutions. We have an expert team with the technical skills, operational knowledge, and experience in both communication protocols and diverse automation systems. Utthunga is proud to be one of the major contributors to various OPC working groups. We have over 13 years of expertise with major focus in process/factory/power/building domains. You get the following assured benefits by collaborating with Utthunga:

  • Reliable and quality deliverables
  • Extended and increased bandwidth
  • Reduced time to market
  • Flexible and scalable OPC UA solutions

Speed up the digitization of your organization with our OPC UA application development services. Contact Utthunga for customized OPC UA integration services.


The standards suggest you to use FIPS 140-2 based compliant algorithms so and so, but the standard will not suggest how to implement it. Also, there is a document released by foundation “Practical Security Recommendations for building OPC UA Applications” you can referee that to get some idea.

There is a limitation and dependencies in OPC classic. Especially, concerned with DCOM and COM configurations. OPC UA is built and being improved keeping security in mind, but it is not the case with classic

If the client is OPC Classic, then it can only connect to OPC Classic DA Server. However, if you have OPC UA server, then you can use it to convert to OPC DA data and then be able to connect using OPC Client.

The certificates are created by both server and client. It follows the x509certificate format.

There are no separate tools available in the market to manage the security certificates. It’s up to OPC Pub/Sub development vendor to provide the tool required to generate the certificate keys. The user shall be able to select the tool that works best for them if it is compliant with the OPC specifications.

“Thank you for your interest in approaching Utthunga for implementing an OPC UA solution for your Windows application. The simplest approach is to have a COTS solution that allows you to customize your OPC UA application based on your business requirements and needs. In case, you need assistance in the stack selection and implementation of different OPC UA applications, we can help you as our Industrial Connectivity solutions leverages the domain and technical expertise of our competent team of developers. We’ll also help you determine the scan times and tag limitations based on the target machine’s hardware and software configurations. We are a vendor neutral supplier of certified OPC UA and OPC based data interoperability products for control automation, to ensure secure, authenticated, and encrypted communications across various network topologies. “

Yes, Device Security and OPC UA security (or any protocol/application level security) are two totally different features.

Device security includes communication security along with data security, identifying vulnerabilities to setup protection mechanisms, monitoring, notification and configurability. The scope of OPC UA security covers only communication security.

For OPC UA security, usually the OPC UA stacks depend on other security stacks like OpenSSL, mbedTLS etc.

Due to the inherent features of the device security, it can’t be provided with a stack. However, it will be provided as a service. This is because the security aspects of every device vary from device to device based on hardware, form factor, firmware design, how the device is going to be used by the end customer, etc.,

To answer your question of whether to purchase a separate stack or opt for a service, we can collaborate for a suitable engagement model that involves a security consultant, developer and tester along with your product development team throughout the product development lifecycle including maintenance (as new types of security threats being discovered, to keep the product up to date from security aspects).

Thank you for reaching out for our help with your OPC related issue. To enable you to collect all the OPC data in one server in a central location, please follow the below steps.

  • Install Server side component in the 7 independent DCS network which shall all expose data over OPC UA
  • In Firewall settings, enable the port which is used by OPC UA Server in the Server side component
  • In Central location, install Client side component and configure such that it shall connect all OPC UA Server (Server side component(s)) running in 7 independent DCS network
  • Now, the Client side component will act as a central server, which shall collect all the OPC data from different locations in a secure manner

You can directly reach out to our OPC experts for a more detailed understanding of our OPC capabilities and services that meets your specific requirements.

Usually the certificates are generated in their trusted path. But, whenever the application tries to connect, the certificates are moved to rejected folder path and the end-user need to manually copy that certificate to the trusted location. This procedure is applied for both Client end and the server end.

To answer your question

  • On server side, it shall be using port 636.
  • On client side, it depends on OPC UA Server port configuration However, for machine discovery it uses port 4840.

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