I. Pre-Emergency Preparation
Immediately switch the hot runner system to manual temperature control mode to avoid temperature jumps and overheating caused by the failure of the default factory RC parameter filtering.
Retrieve the pre-backed-up RC reference parameter file and confirm that the original calibration resistance values, capacitance values, filter cutoff frequency, and other core parameters are complete.
Prepare an oscilloscope and a standard signal generator for subsequent quick verification of RC performance and to confirm that the hot runner is in a safe standby state.
II. 30-Minute Quick Recovery Operation
Enter the temperature controller's main menu, find the "Signal Filtering Settings" sub-option, and switch the factory default "Automatic Adaptation" mode to "Manual Configuration" mode.
According to the original RC parameters in the backup file, enter the corresponding resistance level, capacitance value, and set the target filter cutoff frequency.
After submitting the parameters, quickly verify with a standard signal generator: confirm that the target interference signal attenuation is ≥20dB and the total RC time constant is ≤200ms.
After confirming that the parameters meet the standards, directly activate the "hardware latch" function to fix the RC parameters at the current level, preventing accidental resets.
III. Rapid On-Site Closed-Loop Verification
Switch back to automatic temperature control mode and observe the temperature reading for 15 minutes to confirm no jumps or oscillations, and that the temperature control accuracy has returned to the process requirement range.
Simulate typical on-site interference conditions to verify the stable filtering effect and the absence of abnormal signal interference sampling.
Record the accidental reset event and the restored RC parameters in the process file, simultaneously investigate the cause of the reset, and complete the anti-reset configuration.
IV. Backup Solution
If the original backup parameters are lost, directly measure the current on-site interference frequency with an oscilloscope to quickly calculate the appropriate RC parameters: set the filter cutoff frequency to 1/5 to 1/10 of the interference frequency. New parameter configuration can be completed within 10 minutes, quickly restoring production.
