Code 10750: [Channel %1: ] Block %2 tool radius compensation activated without tool number
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical [Channel %1: ] Block %2 tool radius compensation activated without tool number 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 Diagnostics Manual (DAsl), 03/2009 Definitions: A tool T... must be selected so that the control can make allowance for the associated compensation values. A correction data block (D1) containing the correction values (parameter P1 - P25) is automatically assigned to each tool (T number). Up to 9 correc tion data blocks can be assi gned to a tool by specifying the required data block with the D number (D1 - D9). The cutter radius compensation (CRC) is allowed fo r if function G41 or G42 is programmed. The correction values are contained in parameter P6 (geomet ry value) and P15 (wear value) of the active correction data block Dx. Reaction: Correction block is reorganized. Interpreter stop Local alarm reaction. Interface signals are set. Alarm display. Remedy: Before calling the CRC with G41/G42, program a tool number under the address T... 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 10750 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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