230-04F6

Check Following Error Status

Access MOD function, select 'Diagnosis' and check 'Servo diagnosis' to view current following errors for all axes.

Following errors typically increase with higher feed rates or worn mechanical components

Review Warning Threshold Parameters

Check MP1715 (following error warning limit) and compare with MP1710 (following error limit) to verify threshold settings are appropriate for your application.

Do not increase error limits without understanding root cause of following errors

Analyze Servo Performance

Use TNCopt or servo trace function to monitor actual vs. commanded position during programmed moves to identify mechanical binding or servo tuning issues.

Enable trace recording during typical machining operations to capture intermittent following error spikes

Verify Mechanical Condition

Check for mechanical binding, worn ball screws, or coupling issues that could cause increased following errors during motion.

Ensure machine is powered down and locked out before performing mechanical inspections

Check Spindle Speed Deviation

Access MOD > Diagnosis > Spindle diagnosis to view actual vs. commanded spindle speeds and deviation values.

Speed deviations often occur during heavy cutting loads or with worn spindle bearings

Review Spindle Monitoring Parameters

Check MP3411 (spindle speed warning threshold) and MP3410 (spindle speed error limit) to verify appropriate settings for your spindle configuration.

Increasing thresholds may mask developing spindle problems

Analyze Spindle Load Conditions

Monitor spindle load percentage during machining operations and correlate with speed deviation occurrences to identify cutting parameter issues.

Use spindle load monitoring in conjunction with speed monitoring to optimize cutting parameters

Verify Spindle Drive Status

Check spindle drive parameters and encoder feedback signals for proper operation and signal integrity.

Spindle encoder problems can cause erratic speed feedback and false warnings

Check Temperature Status

Access MOD > Diagnosis > Temperature monitoring to view current temperatures of all monitored components including drives and motors.

Temperature warnings often precede thermal shutdowns by 10-15 minutes

Review Temperature Thresholds

Check MP7210 (drive temperature warning) and MP7220 (motor temperature warning) to verify threshold settings match component specifications.

Never increase temperature thresholds beyond manufacturer specifications

Inspect Cooling Systems

Verify proper operation of cooling fans, heat exchangers, and air filtration systems for control cabinet and motor cooling.

Clean air filters monthly in dusty environments to maintain proper cooling airflow

Monitor Ambient Conditions

Check shop ambient temperature and humidity levels, ensure adequate clearance around electrical cabinets for proper ventilation.

High ambient temperatures above 40°C can cause frequent temperature warnings

Check Position Monitoring Status

Access MOD > Diagnosis > Position monitoring to view encoder position differences and reference point status for all axes.

Position monitoring warnings often indicate developing encoder or reference switch problems

Verify Reference Point Settings

Check MP1025 (reference point monitoring) and ensure reference switches are properly adjusted and functioning correctly.

Faulty reference switches can cause position monitoring errors and loss of machine reference

Test Encoder Signal Quality

Use encoder test function in service menu to verify signal amplitude, frequency response, and noise levels on position feedback systems.

Encoder signal degradation often shows as intermittent position monitoring warnings before complete failure

Perform Reference Point Calibration

Execute reference point procedure and verify repeatability within specified tolerances, typically ±0.001mm for linear axes.

Always perform reference point procedure after any encoder or reference switch maintenance

Access PLC Program

Enter PLC programming mode and review monitoring task functions to identify which specific condition triggered the warning.

Look for custom monitoring functions using system variables $A_DBB, $A_DLB, or $A_DWB

Check System Variables

Monitor relevant system variables in PLC program that interface with monitoring tasks to identify the specific warning condition.

Modifying PLC monitoring functions requires thorough understanding of machine safety systems

Review Machine Documentation

Consult machine builder documentation for custom monitoring task implementation and warning condition definitions.

Machine builders often implement custom monitoring for hydraulic pressure, coolant flow, or tool condition monitoring