Fanuc Focas 2 2021 [DIRECT]
FANUC FOCAS 2 (Fanuc Open CNC API Specifications) is a powerful communication protocol and library that bridges the gap between FANUC CNC controllers and external PC applications. It allows developers to "ask" a machine for real-time data or issue commands, making it a cornerstone of modern smart manufacturing and Industrial IoT (IIoT). Core Capabilities
- Licensing: The FANUC CNC must have the "Ethernet Board" (Data Server) option and the "FOCAS 2 Library" option enabled. These are paid options from FANUC. Without them, the Ethernet port is disabled or limited to file transfers only.
- Programming Complexity: FOCAS 2 uses C-style function calls with complex structures and pointer handling. While libraries exist for Python and C#, building a robust application requires low-level systems programming knowledge.
- Connection Limits: A single FANUC CNC typically supports only a limited number of simultaneous FOCAS 2 connections (often 2-4).
- Speed: For very high-speed data logging (e.g., 1000+ samples per second of servo data), FOCAS 2 may struggle. That requires the specialized High-Speed Option (HSSB or Fast Ethernet).
- CPU: Quad-core processor (up to 4 CPU cores)
- Memory: 4 GB RAM, 128 GB storage
- Display: 15-inch LCD display (1280 x 1024 pixels)
- Axes Control: Up to 32 axes of control
- Interpolation: 4-axis simultaneous interpolation
- Communication: Various communication protocols, including Ethernet, USB, and RS-232
centers—machines that didn't just cut metal; they whispered data. fanuc focas 2
- Inventory your Fanuc CNCs. Check if the "FOCAS / Ethernet" option is active.
- If not, quote the option from your local Fanuc distributor.
- Download a trial of a FOCAS 2 explorer tool (or write a quick C# script) to ping one machine.
- Start building your Real-Time Dashboard.
7. Troubleshooting Common Errors
| Error Code | Symbolic Name | Meaning & Fix |
|------------|---------------|----------------|
| -8 | EW_SOCKET | Network unreachable – check firewall, port, IP address. |
| -12 | EW_MAX_CONNECT | Max number of FOCAS clients already connected – close idle connections or increase CNC option limit. |
| -15 | EW_PROT | FOCAS protocol mismatch – update CNC firmware or FOCAS library version. |
| -106 | EW_FUNC | Requested function not available on this CNC – may need additional option license. | FANUC FOCAS 2 (Fanuc Open CNC API Specifications)
- Real-Time OEE (Overall Equipment Effectiveness): Software can automatically track Planned Production Time vs. Operating Time (Availability), part counts (Performance), and scrap counts (Quality)—all without operator data entry.
- Predictive Maintenance: By monitoring spindle load, axis torque, and alarm frequencies, algorithms can predict bearing failures or tool breakage before they happen.
- Paperless Manufacturing: A central server can push the correct CNC program to a machine just before a job starts, ensuring the operator always runs the latest revision.
- Remote Troubleshooting: A manager or applications engineer can view the exact alarm, program line, and machine state from an office PC, drastically reducing downtime.
- Data Historization: All machine data can be streamed to a SQL database for long-term trend analysis and quality traceability.
Tooling and Maintenance: Reading and writing tool life management data, tool offsets, and workpiece reference points. Licensing: The FANUC CNC must have the "Ethernet
❌ Avoid if:
You need quick setup, modern security, or cannot get the FOCAS option enabled on your machines. Consider MTConnect or an external PLC‑based data collection for simpler read‑only needs.