Code 701618: Check sensor: >No tool present (tool gripper)<
Issue Description & Safety Warning
The Chiron Siemens-Control CNC has triggered a critical Check sensor: >No tool present (tool gripper)< 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
A tool has been deposited in the background magazine or in the magazine chain, but it was noticed that the PLC input signal “No tool available in the tool gripper“ is not indicating. After depositing a tool, the sensor is checked for the signal status (1) with opened tool gripper and the tool gripper in the home position. Error messages Tool change Check sensor: >No tool present (tool gripper)< The tool change procedure is stopped. 1. Check sensor and PLC input signal "No tool in the tool gripper". 2. As soon as the malfunction is remedied, press one of the following keys: [FEED START] [CYCLE START] Message is cleared. The diagnostic overview of the sensor signals 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 701618 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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