235-0043

Check HSCI buffer status

Navigate to MOD function → System Info → Communication → HSCI Status and verify buffer utilization levels.

Buffer utilization above 85% indicates potential overflow conditions

Reset HSCI interface

Access Setup → Machine Parameters → Communication → MP7210 HSCI_RESET and set to 1, then back to 0 after 5 seconds.

Ensure no active machining operations before resetting HSCI interface

Verify communication timing

Check MP7211 HSCI_TIMEOUT parameter and increase value by 50ms if currently below 200ms.

Slower networks may require timeout values up to 500ms

Clear communication buffers

Execute PLC function M_HSCI_CLEAR through Setup → PLC → Function Test to flush all HSCI buffers.

Perform HSCI hardware test

Navigate to Test → Hardware Test → Communication Interfaces → HSCI Test and run complete diagnostic cycle.

Hardware test should complete within 30 seconds for healthy interface

Check interface card connections

Power down system and verify all connectors on HSCI card are properly seated, check for corrosion or damage.

Always follow proper lockout/tagout procedures before opening electrical panels

Verify card LED status

Observe HSCI card LED indicators during startup - should show green steady state after initialization sequence.

Flashing red LED indicates hardware fault requiring card replacement

Test with spare interface card

If available, swap HSCI interface card with known good spare and test watchdog deletion functionality.

Verify HSCI protocol settings

Check Setup → Machine Parameters → Communication → MP7200-MP7220 series for correct protocol configuration matching connected devices.

Document current settings before making changes for easy rollback

Reset to factory defaults

Set MP7200 HSCI_PROTOCOL to 0 (default), then reconfigure based on actual hardware requirements.

Resetting protocol parameters will interrupt all active communications

Adjust handshaking parameters

Verify MP7215 HSCI_HANDSHAKE matches connected device requirements - typically set to 1 for hardware handshaking.

Software handshaking (value 2) may be required for older interface devices

Test watchdog functionality

Execute controlled communication reset through PLC program to verify watchdog can be properly created and deleted.

Check system software integrity

Navigate to MOD function → System Info → Software → Check System Files and run complete integrity verification.

Integrity check may take 10-15 minutes depending on system configuration

Reload communication drivers

Access Setup → Software Options → Communication Drivers and perform reload operation for HSCI module.

Driver reload requires system restart and will interrupt all operations

Restore from backup

If available, restore system configuration from known good backup using Setup → Backup/Restore → System Restore.

Always create current backup before restoring previous configuration

Contact Heidenhain support

If software corruption persists, contact Heidenhain technical support for system software reinstallation procedures.