Code 703140: Tool identification system not in working position
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Tool identification system not in 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
The command "Tool identification system to working position" was output, but this is not in the working position. The PLC input signal "Tool identification system, working position" is not registered. Operation is stopped. If the sensor registers in order again within a monitoring time of about 8 seconds, the machine continues on immediately. After the monitoring time has elapsed, the error must be acknowledged. 1. Check sensor and the PLC input signal "Tool identification system, working position". 2. Check actuation and valve "Tool identification system" to working position. 3. As soon as the malfunction has been remedied, press [FEED START] or [CYCLE START]: Message is cleared and the machining program is continued. 4. Switch to NC operating mode "Manual mode". 5. Press [TOOL CH HOME POS.] key. Tool gripper is moved to the home position. The menu can be found under: Chapter 2.2 ‘Tool changer diagnostics menu’ on page 11
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 703140 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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