Code 700306: Check sensor: >Tool inserted correctly (loading position)<
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Check sensor: >Tool inserted correctly (loading position)< 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 magazine was moved with the keys at the tool loading position. During this process, the proximity switch "Tool inserted correctly" permanently indicated signal status (1). While the magazine is traversing, the switch is monitored for a signal switch from (1) to (0). It is no longer possible to start the program or change the tool. The direction keys at the loading position are blinking quickly. 1. Open the tool loading door and check the proximity switch "Tool inserted correctly". 2. Check the PLC input signal. 3. Once the malfunction has been remedied, press [RESET] key 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 700306 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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