# Request for information for re-engineering of the OPC DA (Data Access) communication protocol for control systems that are impacted by the Microsoft security changes for systems using the Windows operating system and have the OPC classic architecture infrastructure based on DCOM based communication (where OEM support is no longer available as they

> This tender closed on 2026-07-30.

- **Reference:** E2574GXMPGROR
- **Issuer:** [Eskom - Generation](https://za.bidwunder.com/tenders/issuer/eskom-generation.md)
- **Region:** Mpumalanga
- **Type:** Professional Services Contract
- **Published:** 2026-06-23
- **Closing date:** 2026-07-30 10:00 SAST
- **Sectors:** [Computer and electronic products](https://za.bidwunder.com/tenders/sector/C26.md), [Other professional services](https://za.bidwunder.com/tenders/sector/M74.md)

## Summary

#### Overview
**Request for information (RFI) to re-engineer the OPC DA (Data Access) communication protocol for Windows-based control systems using the OPC classic architecture with DCOM, in response to Microsoft security changes and the loss of OEM support.** The RFI seeks input from vendors/consultants with expertise in industrial automation, OPC DA/DCOM, and Windows security to help shape viable re-engineering approaches. Issued by Eskom - Generation for activity at Grootvlei Power Station.

#### How to Apply
- Submission deadline: 2026-07-30 08:00.
- Tender Office Location: Grootvlei Power Station.
- Submission method, required documents, pre-qualifications, and briefing details are not specified in the metadata. (No attached documents were provided in this package.)

## Description

Request for information for re-engineering of the OPC DA (Data Access) communication protocol for control systems that are impacted by the Microsoft security changes for systems using the Windows operating system and have the OPC classic architecture infrastructure based on DCOM based communication (where OEM support is no longer available as they

Request for information for re-engineering of the OPC DA (Data Access) communication protocol for control systems that are impacted by the Microsoft security changes for systems using the Windows operating system and have the OPC classic architecture infrastructure based on DCOM based communication (where OEM support is no longer available as they

Tender Office Location: Grootvlei Power Station

## Documents

- Tender documents (4 files).zip
- E-Tenderers E-Tendering Training Acknowledgement Form - 27 January 2025.docx..docx
- E-tendering Help Manual for supplier - 27 January 2025.docx..docx
- Re-engineering of OPC serves and Backup HMI RFI SOW signed.pdf..pdf
- EXPRES\~2.PDF..PDF
- E-tendering Help Manual for supplier - 27 January 2025.docx

Documents download with a free BidWunder account.

## Published on

- [Eskom Tender Bulletin](https://tenderbulletin.eskom.co.za/tender/95444)
- [eTenders OCDS API](https://www.etenders.gov.za/Home/opportunities?id=1)
- [eTenders.gov.za](https://www.etenders.gov.za)

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> Source: https://za.bidwunder.com/tenders/request-for-information-for-re-engineering-of-the-opc-da-data-access-communicati-cd4c8aad