235-00A0

Access Machine Parameters

Press MOD key, select 'Machine Parameters' menu, navigate to MP7210.x series for HSCI device configuration.

Document current settings before making changes

Verify Drive Configuration

Check MP7210.0 through MP7210.15 for HSCI device types and compare with actual installed drives at the reported address %3.

Incorrect parameter changes can cause additional communication errors

Correct Configuration Mismatch

Set the appropriate MP7210.x parameter to match actual hardware or set to 0 if no drive is installed at that position.

Restart Control System

Perform a complete power cycle of the TNC control to reinitialize HSCI communication with new parameters.

Check HSCI Cable Connections

Inspect all HSCI cables at the reported device address %3, ensuring secure connection at both TNC control and drive unit ends.

Power down system before disconnecting HSCI cables

Verify Cable Integrity

Check HSCI cable for physical damage, proper shielding, and correct cable type (typically shielded twisted pair for HSCI communication).

Test Communication Path

Use TNC diagnostic menu 'Info' > 'HSCI Devices' to verify which devices are detected on the bus after reconnection.

Clear Alarm and Test

Press CE key to clear alarm, then cycle through machine modes to verify proper drive communication.

Check Drive Power Indicators

Verify LED status on the drive unit at address %3 - should show green power LED and proper status indicators.

Refer to drive unit manual for specific LED diagnostic codes

Measure Drive Supply Voltage

Use multimeter to verify proper DC bus voltage (typically 24VDC control voltage and appropriate motor voltage) at drive terminals.

Check Drive Fuses and Breakers

Inspect and test all fuses and circuit breakers in the drive power supply circuit, replace if blown.

Verify Drive Internal Status

If drive has local display, check for internal fault codes that might prevent HSCI communication.

Scan HSCI Device Addresses

Access TNC menu 'Diagnosis' > 'HSCI' to view all detected devices and their assigned addresses.

Document all found addresses before making changes

Check for Address Duplicates

Compare detected addresses with machine parameter MP7200.x series (HSCI address assignment) to identify conflicts.

Reassign Conflicting Addresses

Modify MP7200.x parameters to assign unique HSCI addresses to each drive unit, ensuring no duplicates exist.

Reinitialize HSCI Bus

Restart TNC control to reinitialize HSCI communication with corrected address assignments.

Test HSCI Interface Status

Check TNC diagnostic menu for HSCI interface status and error counters in 'Info' > 'System Info' > 'Interfaces'.

Swap HSCI Connections

If possible, temporarily connect a known working drive to the same HSCI port to isolate interface vs. drive issues.

Ensure proper system shutdown before swapping connections

Check Interface Module Seating

Power down and reseat HSCI interface cards in both TNC control and drive units, ensuring proper connector engagement.

Contact Heidenhain Service

If interface hardware failure is confirmed, contact authorized Heidenhain service for interface module replacement.