239-001E

Check Drive Supply Voltages

Navigate to MOD > Service > Drive Diagnosis and monitor the DC bus voltage and 24V supply for the affected axis drive.

DC bus should typically be 540-565V for 400V systems, 24V supply should be 22-26V

Verify Main Power Quality

Use multimeter to check incoming AC supply voltage stability and verify all three phases are balanced within 2% at the drive input terminals.

Ensure proper lockout/tagout procedures before accessing electrical panels

Inspect Power Connections

Check all power connections to the drive module for loose terminals, corrosion, or overheating signs at L1, L2, L3 inputs and DC bus connections.

Test Under Load Conditions

Run axis movement while monitoring voltage levels in Service > Drive Diagnosis to identify voltage drops during acceleration/deceleration.

Perform Drive Self-Test

Access MOD > Service > Drive Test and execute the internal diagnostics for the affected axis drive to identify hardware faults.

Document all error codes from the self-test for technician reference

Check Drive Firmware Version

Navigate to MOD > Service > Version Info and verify the drive firmware version matches the TNC control requirements and latest updates.

Swap Drive Module

If available, swap the suspected drive module with a known good module of the same type to isolate the fault to the drive electronics.

Power down system completely and wait 5 minutes for capacitor discharge before handling drive modules

Reset Drive Parameters

Backup current parameters, then reload factory defaults for the drive and reconfigure axis-specific parameters from backup.

Check HSCI Bus Status

Navigate to MOD > Service > HSCI Diagnosis and verify communication status and error counters for the affected drive connection.

Look for CRC errors or timeout counters that indicate communication issues

Inspect HSCI Cables

Visually inspect the HSCI communication cables between TNC and drive for damage, proper seating, and correct pin assignments.

Verify Bus Termination

Check that HSCI bus termination resistors are properly installed at the last drive in the chain and that bus topology is correct.

Test Communication Integrity

Use TNC diagnostic functions to perform communication loop tests and verify data integrity across the HSCI network.

Check Grounding System

Verify proper PE (protective earth) connections at drive mounting points and ensure ground impedance is less than 0.1 ohms to main ground point.

Inspect Cable Routing

Ensure power cables and signal cables are properly separated and that motor cables are routed away from sensitive control wiring.

Maintain minimum 200mm separation between power and signal cables

Verify EMC Compliance

Check that all motor cables have proper shielding connected to ground at both ends and that EMC filters are installed on drive inputs.

Test in Different Conditions

Monitor alarm occurrence during different machine operations to correlate with potential interference sources like welders or other high-power equipment.