Fanuc Focas Documentation 【Web Instant】

FOCAS is FANUC’s official library (DLLs/API) for reading/writing data from FANUC CNCs (Series 0i, 30i, 31i, 35i, etc.) over Ethernet or HSSB.

Furthermore, some functions are optional. For example, accessing the file system via the Data Server or using high-speed data sampling often requires specific software options to be purchased and installed on the CNC. Developers must cross-reference the "Option" requirements listed in the documentation with the actual configuration of the target machine. fanuc focas documentation

To begin developing custom applications (often in C# or C++): cnc_download (NC programs

B-64124EN – FOCAS1/FOCAS2 Library Manual (contains function reference, data types, error codes). etc.) over Ethernet or HSSB. Furthermore

There are two primary ways to connect a PC to a FANUC controller using FOCAS: Overview | General | Fanuc Focas Library - inventcom

| Chapter | Content | |---------|---------| | 1 | Overview – FOCAS2 architecture, DLL loading | | 2 | Connection functions – cnc_allclibhndl3 , cnc_startuptool | | 3 | Data read functions – macro variables ( cnc_rdmacro ), diagnostics, alarms, positions | | 4 | Write functions – macro write, offset setting, program selection | | 5 | File operations – cnc_upload , cnc_download (NC programs, parameters) | | 6 | High‑speed sampling – cnc_setsampling , cnc_getsampling | | Appendix A | Error codes (e.g., EW_OK=0, EW_HANDLE=1, EW_NODATA=10) | | Appendix B | Data structures (ODB* families) |