Code 703104: Sensor monitoring! Tool identification system: Home position/ working position
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Sensor monitoring! Tool identification system: Home position/ working 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
Both sensors of the tool identification system, home position and working position, signalled at the same time. Tool loader functions are stopped immediately. 1. Check the sensors "Tool identification system, home position" and "Tool identification system, working position" and the PLC input signals. 2. As soon as the malfunction has been remedied, press [FEED START] or [CYCLE START]: Message is cleared. The menu can be found under: Chapter 2.2 ‘Tool changer diagnostics menu’ on page 11 Error messages Tool identification Sensor monitoring! Tool identification system: Home position/working position
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 703104 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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