Code 700123: Check limit switch or locking magnets of protect. doors
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Check limit switch or locking magnets of protect. doors 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
Both inputs of a locking switch signal "locked" and "test" at the same time. Feed Stop Spindle Stop 1. Check the limit switch and inputs "Locking switch" and "Safety relay. 2. Once the malfunction has been eliminated, switch off the control with the [Control OFF] key 3. Turn on the control with the key [Control ON] Message is cleared. Depending on the machine model, the construction makes a difference between the "Locking switches“. In the PLC – diagnosis in DB94.DBB1015 it will be displayed at which switch the fault has occurred. DB94.DBX1015.0 Protective doors front (with W machine) DB94.DBX1015.1 Locking switch protective door left (with W machine side door) DB94.DBX1015.2 Locking switch protective door right Cause 2:
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 700123 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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