--- title: "VSD system optimization | Citia" description: "This project restores normal operation of the distribution pumps and VSD by separating the control system. The system was first centralized on one…" url: https://citia-engineering.com/en/projects/vsd-system-optimization language: en updated: 2026-08-24 type: project site: Citia Engineering Indonesia --- # VSD system optimization This project restores normal operation of the distribution pumps and VSD by separating the control system. The system was first centralized on one Allen-Bradley (AB) PLC. | Field | Value | | --- | --- | | Year | 2022 | | Status | Finished | | Work types | Instrumentation, HMI, SCADA, Motor, VFD | | Updated | 2026-08-24 | ## About this work **Overview** This project restores normal operation of the distribution pump and VSD system so it works properly. Before, all field logic was controlled centrally by an Allen-Bradley (AB) PLC. To improve performance and operational focus, the team modified the system by separating a dedicated control panel for distribution/pumps and VSD from the main system. **Challenges** - **Migrating a live system:** Separate the pump and VSD control logic from the existing central (AB) PLC program without disturbing other functions that remain on that PLC. - **Multi-vendor integration:** Make sure the existing AB PLC, the new Siemens S7-1200 PLC and the Vijeo Citect v7 SCADA communicate and stay in sync. **Solutions** - **Added a dedicated panel:** Installed a new PLC panel with a Siemens S7-1200, dedicated to the distribution system workload (pumps & VSD). - **Reprogramming across platforms:** Modified the AB PLC program to release the pump functions, and wrote new control logic on the Siemens 1200 PLC. - **SCADA update:** Reconfigured the *tags*, communication and HMI graphics in the Vijeo Citect v7 SCADA so operators can control this decentralized architecture smoothly. **Lessons learned** Decentralizing the control of critical systems (such as pumps and VSD) into separate panels (*dedicated controller*) proved very effective for restoring the system. It reduces the processing load on the main PLC and makes *troubleshooting* and *maintenance* much easier later. Devices from different *brands* (AB and Siemens) can work well together if the network design and the SCADA configuration are done correctly. ## Contact - Company: PT Citia Engineering Indonesia - Email: services@citiaengineering.com - Telephone: +62 21 278 20286 - Office: Jl. Kaimun Jaya No. 1, Cilandak Barat, Jakarta Selatan, DKI Jakarta 12430, Indonesia [Contact Citia](https://citia-engineering.com/en/contact.md) ## Structured data (JSON-LD) ```json { "@context": "https://schema.org", "@graph": [ { "@type": "Organization", "@id": "https://citia-engineering.com/#organization", "name": "Citia Engineering Indonesia", "legalName": "PT Citia Engineering Indonesia", "alternateName": "Citia", "url": "https://citia-engineering.com", "logo": { "@type": "ImageObject", "url": "https://citia-engineering.com/media/citia-logo.png", "width": 950, "height": 328 }, "description": "Citia is an engineering and system integration company in Jakarta. We connect field devices, PLC and SCADA, terminal software and enterprise systems, then install, test and maintain them.", "email": "services@citiaengineering.com", "telephone": "+62 21 278 20286", "address": { "@type": "PostalAddress", "streetAddress": "Jl. 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