Code 701754: Protective doors not locked
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Protective doors not locked 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 right protective door is closed, but not locked. The secure input signals "Right protective door closed and locked" are not registered. Not all machine functions are executed. Error messages Protective equipment Protective doors not locked 1. Check the PLC output signal. 2. Check the PLC input signal. 3. Check the secure input signals "Right protective door closed and locked". 4. Check the mechanical locking magnet of the right protective door (possibly plunger or tongue jammed). 5. Close the right protective door. 6. Press [FEED START] key. Protective equipment is locked and the message is cleared.
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 701754 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.
Have a better solution?
Help the industrial community by sharing your repair experience for code 701754.
Need a searchable reference for more Chiron Siemens-Control CNC manuals?
We structure equipment manuals into searchable code, title, cause, solution, safety note, and source-reference data. Send a PDF and example searched codes when you need public pages, private search, or structured exports.
Space reserved for Google AdSense / Industrial Affiliate Links
Monetization target for 2026