Code 701261: No acknowledgement mode possible in mode 1
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical No acknowledgement mode possible in mode 1 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
It was attempted to start an action with the [Door bypass button] on the control panel, of the manual pulse generator or on the magazine chain. Function is not possible in [Operating mode " Automatic mode"] The action is not executed. Activate [Operating mode "Set-up mode"] since the [Door bypass button] is only permissible in this operating mode. Error messages Safety technology No acknowledgement mode possible in mode 1
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 701261 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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