Code 702217: System error tool management SIEMENS! T preselection <> T output
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical System error tool management SIEMENS! T preselection <> T output 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
A serious system error has occurred. This message is output because the tool changing cycle has to be interrupted. The tool change cycle is no longer executed since the tool data in the tool management can no longer be correctly implemented. Remedy: a ) The error occurs, for example, when an attempt is made to "transfer" a tool, but the job has not yet been executed. If this tool is now called up sometime, the target data is no longer correct. This means that "Z" would be written to a wrong place and the tool management system gets confused. The message appears, e.g. when the following data modules are different: DB72.DBW24 <> DB72.DBW48 DB72.DBW26 <> DB72.DBW50 This error can only be rectified with an "NCK Reset". Remedy: b) The error occurs, for example, when an attempt is made to transfer the spindle tool, although this is not possible. If another tool is now called, the target data is no longer correct. This means that "Z" would be written to a wrong place and the tool management system gets confused. The message appears, for example, when the wrong target place is in the following data modules: DB72.DBW28 Target magazine DB72.DBW30 Target place This error can only be rectified if the spindle tool is redefined.
Source: CHIRON Error Message Overview, all series (Siemens control, V2.0.6, 2012)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Chiron Siemens-Control CNC Alarms
Chiron controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 702217 on the Siemens-Control CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Chiron's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 545 Chiron Siemens-Control CNC codes.
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