Code 701623: Error in NC program! Different T-output (background magazine)
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Error in NC program! Different T-output (background magazine) 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
The T output (tool call) is different in the NC program. Different tools cannot be preselected consecutively. (T-output without M6). A tool which is preselected must also be changed in with "M6". Read disable Tool change is not executed. 1. Check NC program. 2. Correctly set the T-output (tool preselection and change in tool). 3. Press [RESET] key. Message is cleared. Examples for correct programming: T2222 (preselect tool 2222) T2222 M6 (change in tool 2222) or T2222 M6 (change in tool 2222) T3333 M6 (change in tool 3333) Examples of faulty programming: T2222 (preselect tool 2222) T3333 M6 (change in tool 3333) or T2222 (preselect tool 2222) T3333 (preselect tool 3333)
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 701623 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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