Code PS0456 / BG0456 / SR0456: ILLEGAL PARAMETER IN GRINDING
Issue Description & Safety Warning
The Fanuc 0i-D / 0i Mate-D Alarm List has triggered a critical ILLEGAL PARAMETER IN GRINDING alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Section: CNC alarm list Alarm group: Program/operation, background edit, communication (PS/BG/SR common alarm number) Original alarm number: 0456 Parameters related to grinding canned cycles are incorrectly set. Probable causes are given below. 1) The axis number of the grinding axis is incorrectly set (parameters Nos. 5176 to 5179). M 2) The axis number of the dressing axis is incorrectly set (parameters Nos. 5180 to 5183). 3) The axis numbers of the cut axis, grinding axis, and dressing axis (only for the M series) overlap.
Source: Fanuc B-64305EN/03 Appendix A Alarm List
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Fanuc 0i-D / 0i Mate-D Alarm List Alarms
Fanuc controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code PS0456 / BG0456 / SR0456 on the 0i-D / 0i Mate-D Alarm List identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Fanuc's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 769 Fanuc 0i-D / 0i Mate-D Alarm List codes.
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