Code 700247: Wrong tool in the spindle
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Wrong tool in the spindle 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
Message can appear during a block search run. Cause 1: The machining program can not be started. 1. Press [RESET] key. Message is cleared. 2. Before the block search run, program the tool in the spindle again. Txx M6 On entering the machining program, possibly with "Block search", no coincidence was found between the spindle tool and the current T output. Feed Stop Read-in enable missing. Check the "entering position" in the NC program to see if the tool which belongs to this NC block is also the current spindle tool. Enter the correct NC block (T** M6). Or, change the tool necessary. Entry with block search run is only possible with the [Calc. contour] key, since otherwise there is no T output.
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 700247 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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