Fanuc Ot 900 - Parameter List

Below are the primary option parameters for the 0-T control. Each parameter consists of 8 bits (labeled 7 to 0 from left to right). Description Canned Cycle (Basic) G10 Program Input of Offset Inch / Metric Conversion Special G Code Tape Memory Addition (120m) Chamfering / Corner Radius Multiple Repetitive Canned Cycles (G70-G76) Constant Surface Speed Control Stored Pitch Error Compensation Custom Macro A Actual Spindle Speed Output Number of Programs (Set to 125) Soft Keys Below CRT

At a minimum, manually write down or photograph every 900‑series parameter displayed on the screen. Store this information in multiple locations: a physical notebook stored near the machine, a digital file on a company server, and potentially even off‑site or in cloud storage.

For anyone who owns or operates a CNC machine with a Fanuc 0T (Zero-T) control, few things are as critical—or as notoriously tricky—as the 900 series option parameters. These parameters, typically ranging from 900 to 939, act as the "DNA" of your machine tool, determining which features and functions are enabled. This comprehensive guide will explain everything you need to know about the Fanuc OT 900 parameter list, from basic definitions to advanced access methods and essential safety precautions.

On certain FANUC 0T control screens, these values must be entered as a two-digit hexadecimal code rather than a string of ones and zeros. Binary to Hexadecimal Conversion Table 1000 0001 1001 0010 1010 0011 1011 0100 1100 0101 1101 0110 1110 0111 1111

The exact allocation of 900 parameters can vary slightly depending on your control master board generation (FANUC 0T-A, 0T-B, or 0T-C). Below is a comprehensive reference list of the most common 900-series parameter bit assignments for the FANUC 0T lathe control. Parameter 900: Axis and Basic Control Options Tool life management function.

Allows switching between metric (G21) and imperial (G20). Bit 6 (Special G Code): Enables special G-codes. Parameter 901: Memory & Interpolation

In the high-precision world of CNC machining, the stands as a legendary workhorse of the industry. While operators interact daily with G-codes and tool offsets, a deeper layer of "silent architecture" exists within the system: the 900 series parameters . Often referred to as "option parameters," this specific range serves as the master switchboard for the machine’s DNA, determining not just how the machine moves, but what it is fundamentally capable of doing. The Role of the 900 Series

(Reading from right to left: bit 0 is the rightmost number)

The is the master key to the control’s firmware identity. While intimidating, it is completely readable and manageable if approached with respect and a solid backup.

your existing 900-939 parameters before changing anything.