Code 17510: [Channel %1: ] Block %2 invalid index for indexing axis %3
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical [Channel %1: ] Block %2 invalid index for indexing axis %3 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 %3 = Axis name, spindle number Definitions: The programmed index for the indexing ax is is beyond the position table range. Example: Perform an absolute approach of the 56th position in the list allocated via the axis-specific MD30500 $MA_INDEX_AX_ASSIGN_POS_TAB with the 1st positi oning axis, the number of positions is e.g. only 40 (MD10900 $MN_INDEX_AX_LENGTH_POS_TAB_1 = 40). N100 G.. U=CAC (56) Or, with equidistant distances, the pr ogrammed index is smaller or equal 0. Or, an attempt is made with a MOV movement to travel to a position outside the permitted area. Reaction: Interpreter stop NC Start disable in this channel. Interface signals are set. Alarm display. Remedy: Program the indexing axis position in the NC part progr am in accordance with the length of the current position table, or add the required value to the position table and adjust the length of the list. Diagnostics Manual (DAsl), 03/2009 Program Continuation: Clear alarm with the RESET key. Restart part 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 17510 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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