CC%2 S input not equal 0

What does 231-E007 mean?

This error occurs during the dynamic test of the second emergency-stop loop in the Heidenhain TNC CNC Controller, specifically related to door contacts and key-operated switch inputs. The system expects these inputs to drop to 0V within 1.5 minutes during the test. A persistent 24V signal indicates a failure to open the safety circuit, which compromises machine safety.

• Incorrect or damaged wiring connecting to the door contacts or key-operated switches within the second emergency-stop loop.
• Malfunctioning door contacts or key-operated switches that fail to switch to an open state (0V) when activated.
• A short circuit in the wiring of the safety inputs, preventing the signal from dropping to 0V as required.

Click steps to track your progress.

1. 1

   Inspect and verify the wiring of all door contacts and key-operated switches connected to the second emergency-stop loop for correct termination, physical damage, or short circuits.

2. 2

   Manually test the functionality of each door contact and key-operated switch individually to ensure they reliably open the circuit (transition to 0V) when activated.

3. 3

   Measure the voltage at the relevant S inputs during the dynamic test; confirm that all inputs transition to 0V within the specified 1.5 minutes.

4. 4

   If all external components and wiring are verified as functional, consult a Heidenhain service agency to investigate potential internal defects within the safety monitoring hardware.