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Code 10860: [Channel %1: ] Block %2 feedrate not programmed

Issue Description & Safety Warning

The Siemens SINUMERIK 840D CNC has triggered a critical [Channel %1: ] Block %2 feedrate not programmed 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

Parameters: %1 = Channel number %2 = Block number, label Definitions: Cause: A traversing velocity has not been progra mmed for the displayed traversing block. Feed F or FZ: With the traversing velocity defined by feed F or FZ, F or FZ was not reprogrammed after the feed type changed, for example linear feed G94 after revolutional feedrate G95 F or G95 FZ. Modal feed FRCM: With modal traversing velocity FRCM defined fo r rounding RND or chamfering CHF, feed FRCM was not reprogrammed after the feed type changed, for exam ple linear feed G94 after revolutional feedrate G95, or revolutional feedrate G95 F after tooth feedrate G95 FZ. Note: Feed FRCM also has to be reprogrammed when the feed type changes if the current traversing block does not contain chamfering CHF or rounding RND, but the feed FRCM was programmed active, that is unequal to 0, before the feed type changed. Reaction: Correction block is reorganized. Local alarm reaction. Interface signals are set. Alarm display. Remedy: Program feedrate in accordance with the interpolation type. - G93: The feedrate is specified as a time -reciprocal value under address F in [rev/min]. - G94 and G97: The feedrate is programmed under address F in [mm/min] or [m/min]. - G95: The feedrate is programmed as revolutional feedrate under address F in [mm/revolution] or under the address FZ in [mm/tooth]. - G96: The feedrate is programmed as cutting rate under address S in [m/min]. It is derived from the current spindle speed. Program Continuation: Clear alarm with NC ST ART or RESET key and continue the program.

Source: SINUMERIK 840D sl / 840Di sl / SINAMICS S120 Diagnostics Manual (DAsl, 03/2009)

Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.

About Siemens SINUMERIK 840D CNC Alarms

Siemens controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 10860 on the SINUMERIK 840D CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Siemens's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.

Complete Alarm List: 4014 Siemens SINUMERIK 840D CNC codes.

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