230-04F4

Access LogView for detailed error information

Power on control, press MOD key, navigate to System Information > LogView. Filter for error entries around the timestamp of alarm 230-04F4. Record the detailed exception message and memory addresses shown.

LogView entries for 230-series alarms often contain hexadecimal error codes that Heidenhain service can decode to identify the exact software module that failed.

Verify NC software version integrity

Press MOD > Software Versions. Check that NCK version, PLC version, and all listed components show identical build numbers with no asterisks or warning symbols. Mismatched versions indicate incomplete installation.

On iTNC 530 and TNC 620/640, the software version screen shows a checksum value; any 'INVALID' notation confirms corruption.

Reload NC software from recovery media

Obtain the correct NC software version from Heidenhain (matching your control model and configuration). Boot control into service mode (hold down Machine Key + Power On), insert USB recovery media, and perform complete software installation following the recovery screen prompts.

Complete software reload will reset all MOD parameters to default. Ensure you have a current TNCbackup archive before proceeding.

Restore machine configuration

After successful NC software installation, restore machine-specific configuration using TNCbackup archive from USB. Verify PLC program, machine parameters, and tool tables are correctly loaded before returning to operation.

Always restore from the most recent backup taken before the alarm first occurred, not from older archives that may contain pre-existing corruption.

Check all component firmware versions

Navigate to MOD > Software Versions and record all version numbers. Then access MOD > System Configuration > Drive Parameters to check inverter firmware versions. All major version numbers must match (e.g., all components at 340.49x-xx for TNC 640).

On controls with Heidenhain inverters, the drive firmware version is shown in the IPC 6x8x diagnostic screen under 'Axis Configuration'.

Update all components to matching versions

Download the complete software package from Heidenhain containing matched NC software, PLC runtime, and drive firmware. Install in this order: drive firmware first, then NC software with integrated PLC update.

Never mix software versions from different NC software generations. A TNC 640 running 340.49x software cannot use drives with 340.55x firmware.

Verify PLC program compatibility

If custom PLC programming exists, recompile the PLC source using the PLC development tools matching the new NC software version. Upload the recompiled PLC program via TNCopt or direct USB transfer.

OEM-supplied PLC programs often have version dependencies. Contact your machine builder for PLC programs compiled for your specific NC software version.

Run internal hardware diagnostics

Press MOD key, navigate to System Test > Memory Test and run complete RAM diagnostic (may take 15-30 minutes). Follow with CPU Test to verify processor integrity. Document any failures reported.

Memory testing requires control restart and will interrupt production. Schedule during planned downtime.

Check CompactFlash or SSD health

In MOD > System Information > Storage Media, review the health status and bad sector count for the main storage device. Values above 0 for 'Defective Sectors' or health percentage below 90% indicate failing storage media.

TNC 640 and newer use industrial SSD; older controls use CompactFlash. Both have finite write cycles and should be replaced every 5-7 years as preventive maintenance.

Inspect control hardware for physical issues

Power down and open the control cabinet. Inspect the main CPU board (MC or IPC board) for bulging capacitors, burn marks, or corrosion. Check that all memory modules and daughter boards are fully seated in their sockets.

Only qualified personnel should open the control cabinet. Ensure main power is locked out and wait 5 minutes for capacitor discharge before touching components.