126-0135

Check current license status

Press 'MOD' key, navigate to 'TNCdiag' → 'License Information' → 'Feature Licenses'. Look for entries related to 'Probe Systems' or 'Measuring Cycles' and note the permitted quantity.

Document the feature code (FCL) number displayed - you'll need this when contacting Heidenhain for license upgrades.

Review actual connected devices

In MOD mode, go to 'System Settings' → 'Device Configuration' → 'Probe Devices'. The alarm parameters show current devices (%1) vs. permitted (%2). Compare this with your physical setup.

Take a screenshot of this screen before making changes - useful for service documentation.

Disconnect excess probe hardware

Power down the machine. Physically disconnect probe receivers or TE interfaces that exceed the license limit. Ensure only the required number of devices remain connected to PL/HSC inputs or wireless receivers.

Always power down the complete system before disconnecting probe hardware to prevent communication errors or damage.

Request license upgrade if needed

If additional probes are required, contact your Heidenhain distributor with your TNC NC software ID (found in MOD → TNCdiag → System Information) to purchase an upgraded license for additional MB/TE devices.

License upgrades are typically delivered as encrypted files (.lic) that are loaded via USB - no hardware changes required.

Identify all wireless receivers

Physically trace all cables connected to the TNC control. Check for multiple TT 140, TT 160, or KT 130 wireless receiver units connected to different PL inputs or USB ports.

Wireless receivers may be mounted in hard-to-see locations like the control cabinet door or rear panel - check thoroughly.

Review probe configuration table

In MOD mode, select 'Probing Systems' and review the table entries. Each row represents a configured probe device with its assigned input channel (PL1, PL2, HSC, etc.).

Active probe configurations show green status indicators - disabled entries show gray.

Disable or remove redundant receivers

Power down and disconnect wireless receivers that are not currently needed. If using multiple probes sequentially, configure only one active receiver and swap physical probe hardware as needed rather than maintaining multiple simultaneous connections.

Ensure the probe being disconnected is not currently in the spindle or active in a running program.

Reconfigure probe table

After removing hardware, access MOD → 'Probing Systems' and delete or deactivate table entries for removed devices. Save configuration and restart the control.

Use the 'Export Configuration' function before deleting entries - allows quick restoration if needed.

Access probe system configuration

Press MOD → 'Probing Systems'. Check for duplicate entries with the same hardware address or channel assignment (e.g., two entries both assigned to PL1).

Sort the table by 'Input Channel' to quickly spot duplicate assignments.

Verify unique device addressing

For each configured probe, verify that the 'Device Address' or 'Radio Channel' parameter is unique. No two MB/TE devices should share the same address on the same input channel.

Heidenhain wireless probes use radio channels 1-8. Document which channel each probe uses to avoid conflicts.

Reset probe configuration to defaults

If duplicate entries are unclear, delete all probe system entries in the configuration table. Power cycle the control, then reconfigure probes one at a time, allowing the TNC to auto-detect each device properly.

Deleting probe configurations will also remove custom calibration data - ensure you have backup calibration files before proceeding.