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Code 22068: [Channel %1: ] Block %2 tool management: no tool available in tool group %3

Issue Description & Safety Warning

The Siemens SINUMERIK 840D CNC has triggered a critical [Channel %1: ] Block %2 tool management: no tool available in tool group %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 = String (identifier) Definitions: The specified tool group does not contain a tool wh ich is ready for use and could be used for tool change. It is possible that all of the tools in question have been set to the 'Disabled' state by the tool monitoring function. The alarm c an occur for example in conjuncti on with the alarm 14710 (error on INIT block generation). In this specific situation, NCK attempts to replace the disabled tool located on the spindle with an available re placement tool (which does not exist in this error condition). The user must resolve this confli ct, for example, by removing the t ool located on the spindle from the spindle by issuing a movement command (e.g. through MMC operation). Reaction: Correction block is reorganized. Interface signals are set. Alarm display. Remedy: - Ensure that the specified tool group contains a tool that is ready for use when tool change is requested. - This can be achieved, for exampl e, by replacing disabled tools, or - by releasing a dis abled tool manually. - If an alarm occurs on programming TCA: Has the duplo number been programmed >0? - Check whether the tool data are correctly def ined. Have all intended tools in the group been defined/loaded with the specified identifier? Program Continuation: Clear alarm with NC ST ART or RESET key and continue the program. Diagnostics Manual (DAsl), 03/2009

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 22068 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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