Code 17260: [Channel %1: ] Block %2 illegal magazine location definition
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical [Channel %1: ] Block %2 illegal magazine location definition 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: This alarm occurs if an attempt is made to change a magazine location dat a which would subsequently damage the data consistency or lead to a conflicting definition. Example: If parameter $TC_MPP1 (= type of locati on) is described with 'spi ndle/toolholder location', then this may conflict with the limiting MD18075 $MN_MM_NUM_TOOLHOLDERS. The remedy is then either - if permitted by the control model - to increase the value of MD18075 $MN_MM_NUM_TOOLHOLDERS or to correct the magazine definition. Reaction: Correction block is reorganized. Interface signals are set. Alarm display. Remedy: Correct the NC program. 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 17260 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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