What is ABB Freelance DCS?
ABB Freelance is a scalable Distributed Control System (DCS) designed for process automation in small to medium-sized applications. It combines powerful control capabilities with intuitive engineering tools, making it one of the most trusted platforms in the industry.
Quick Answer
ABB Freelance DCS is a distributed control system that provides integrated control, I/O, and operator interface for process plants. It uses AC700F, AC800F, or AC900F controllers with DigiVis operator stations and Control Builder F engineering software. Freelance is ideal for applications requiring 50 to 5,000+ I/O points.
What Does DCS Stand For?
DCS stands for Distributed Control System. Unlike centralized control architectures, a DCS distributes control functions across multiple controllers throughout a plant. This provides:
- Improved reliability — failure of one controller doesn't stop the entire plant
- Scalability — add controllers as your plant grows
- Faster response — control logic runs close to the process
- Easier maintenance — troubleshoot individual sections independently
Freelance System Architecture
ABB Freelance consists of three main layers:
1. Control Layer (Controllers)
The AC700F, AC800F, and AC900F controllers execute control logic and manage I/O:
- AC700F — Compact controller for small applications (up to ~300 I/O)
- AC800F — Mid-range with modular I/O and optional redundancy (~1,000 I/O)
- AC900F — High-performance for larger applications (up to ~1,500 I/O)
2. Operator Layer (DigiVis)
DigiVis is the Human-Machine Interface (HMI) software that provides operator displays, trending, alarming, and reporting. It runs on standard Windows PCs and communicates with controllers over Ethernet.
3. Engineering Layer (Control Builder F)
Control Builder F is the integrated engineering environment for configuring controllers, creating control logic (IEC 61131-3), designing operator graphics, and managing the entire system from a single tool.
Key Features of ABB Freelance
Integrated Platform
Single engineering tool for control, HMI, and I/O configuration
Optional Redundancy
Controller, network, and power supply redundancy available
Fieldbus Support
PROFIBUS, HART, Modbus, Foundation Fieldbus integration
IEC 61131-3
Standard programming languages: FBD, LD, ST, SFC
Common Applications
ABB Freelance is deployed across a wide range of industries:
- Water & Wastewater Treatment
- Food & Beverage Processing
- Pharmaceutical Manufacturing
- Chemical Processing
- Oil & Gas (upstream/midstream)
- Mining & Minerals
- Pulp & Paper
- Power Generation (auxiliaries)
Freelance vs. System 800xA
Both are ABB DCS platforms, but they serve different market segments:
| Aspect | Freelance | System 800xA |
|---|---|---|
| Target Size | Small to medium plants | Medium to large/enterprise |
| I/O Range | 50 – 5,000+ | 1,000 – 100,000+ |
| Engineering Tool | Control Builder F | 800xA Engineering / CCB |
| Best For | Standalone plants, OEM packages | Enterprise integration, complex operations |
Need Help Choosing?
Our engineers can help you determine whether Freelance or System 800xA is the right fit for your application. We've implemented hundreds of both systems across various industries.
Read our detailed comparison guide →Getting Started with Freelance
Implementing ABB Freelance typically involves these steps:
- 1Requirements Definition
Define I/O count, control strategies, integration needs
- 2System Architecture
Select controllers, I/O modules, network topology
- 3Engineering & Configuration
Develop control logic and operator displays in Control Builder F
- 4FAT & Commissioning
Factory acceptance testing, installation, and startup
Ready to Implement ABB Freelance?
Our team has 35+ years of experience implementing ABB Freelance systems. Contact us for system design, integration, and support.
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