Code 703105: PLC MD incorrect! (Tool identification system)
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical PLC MD incorrect! (Tool identification system) 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
PLC machine parameter 14512[22]Bit1 is set to 0. ( "Without positioning cylinder for the tool identification system".) Monitoring responds if at least one PLC input signal of the tool identification system (home position / working position) is registered. Feed Stop for the background magazine. Tool gripper function not possible. 1. Set the PLC machine parameter according to the machine equipment. 2. Check input in the PLC machine parameter. 3. If the error persists, check the PLC input signals from the tool identification system (home position / working position) for faulty wiring. 4. As soon as the machine parameter has been changed, an NCK Reset must be carried out. 5. 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 703105 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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