231-9310

Access Machine Parameters

Press MOD key, select 'Machine parameters' from setup menu, navigate to encoder configuration section.

Use parameter search function (GOTO) to quickly find posEncoderInput parameters

Verify posEncoderInput Values

Check each axis posEncoderInput parameter value against physical encoder cable connections (X51-X56 correspond to channels 1-6).

Document original parameter values before making changes

Correct Parameter Assignment

Set posEncoderInput to match physical connection: X51=1, X52=2, X53=3, X54=4, X55=5, X56=6.

Cross-reference with machine documentation to ensure proper axis-to-connector mapping

Save and Restart Control

Save parameters with END key, perform control restart to activate new encoder input configuration.

Power Down System

Perform proper TNC shutdown sequence, turn off main power, and verify all motion has stopped.

Always follow LOTO procedures before accessing electrical connections

Trace Encoder Cables

Follow each axis encoder cable from motor/scale to CC61xx card, noting current X5x connector positions.

Use machine electrical drawings to verify correct cable routing and connector assignments

Verify Connector Assignments

Match encoder cable connections to posEncoderInput parameter values: ensure X-axis encoder connects to X51 if posEncoderInput=1.

Encoder connectors may look similar - verify pin assignments match encoder type

Reconnect and Test

Secure all encoder connections, power up system, and verify encoder signals in TNC diagnostic screens.

Access Encoder Diagnostics

Navigate to TNC diagnostic menu, select 'Encoder signals' to view real-time encoder input status for all channels.

Look for missing or erratic signal patterns on specific input channels

Perform Channel Swap Test

Temporarily move suspected faulty encoder to known good X5x input, update posEncoderInput parameter accordingly.

Document original configuration before making test changes

Verify Signal Quality

Use TNC encoder signal display to check amplitude, frequency, and phase relationships of encoder signals on test channel.

Healthy encoder signals should show consistent amplitude and 90-degree phase shift between A/B channels

Replace CC61xx if Confirmed

If encoder works on different channel, CC61xx card requires replacement - contact Heidenhain service for proper card configuration.

Check Software Version History

Access TNC system information to verify recent software changes, note any parameter compatibility issues.

Compare current TNC software version with machine documentation requirements

Restore Parameter Backup

Load known good parameter backup from before software update, ensuring encoder configuration matches hardware setup.

Verify backup date and compatibility with current TNC software version

Reconfigure Encoder Parameters

If no backup available, manually reconfigure all posEncoderInput parameters based on machine electrical documentation.

Create new parameter backup after successful configuration for future reference