75610

In the Siemens HMI, navigate to Diagnostics → Channel Status → RESU State to verify if RESU is still active and check the RTP (Return to Reference Point) status for the affected channel.

Wait for automatic return traveling to complete. Monitor the axis positions in Diagnostics → Axis Status until all axes have reached their reference positions (compare actual position to MD 30350 'CfgReturnParam[].RefPoint').

Do not force NC START during RTP execution as this will trigger 75610 repeatedly.

Once RTP completes, press RESU again to deactivate RESU mode, then attempt NC START. Verify RESU indicator is off in the HMI operator panel before proceeding.

If RTP appears stuck, check MD 30330 'RapidTravers' and MD 30320 'DynLimitParam' parameters to ensure return traveling velocity settings are valid and not zero.

Check the NCK program counter and current block in Diagnostics → Program Info. Identify if the last executed block contains G00 rapid motion or axis-synchronized commands that are still in-motion.

Press Feed Stop (or use HMI Feed Override = 0%) to halt all axis motion completely. Wait 2-3 seconds for deceleration to finish and verify all axis velocities in Diagnostics → Axis Status show 0 mm/min.

Once motion is confirmed stopped, deactivate RESU mode by pressing the RESU button again. Verify MD 20050 'StartupMode' is set to 0 (normal startup) if RESU was triggered by an unexpected reset or power cycle.

Clear any pending program blocks in the NCK buffer by selecting a different program or using Reset. Then attempt NC START again.

Navigate to Diagnostics → Alarms and examine the alarm stack for active or recently cleared alarms (check Alarm Memory). Note any servo-related alarms (700x-series) or safety alarms (500x-series) that may still be blocking machine restart.

Verify the safety gate/door interlock status in Diagnostics → Safety Logic or the PLC Variables screen. Ensure the machine safety gate is closed (typically signal '%I4.5' or equivalent on your machine). MD 28010 'SafetyInterlockMask' defines which safety signals are active.

Never bypass safety interlocks; they are designed to prevent injury.

If an Emergency Stop (E-Stop) was triggered, reset it by pressing the E-Stop reset button on the control panel, then deactivate RESU mode and retry NC START.

If outstanding alarms remain, acknowledge and clear them individually. Then power-cycle the control (warm restart via HMI System → Restart) to reinitialize the NCK state machine and clear residual RESU conditions.