231-81A3

Access oscilloscope configuration

Press MOD key, select 'Diagnosis' menu, then select 'Oscilloscope' to access the integrated oscilloscope function.

Check which axis is referenced in %1 parameter of the alarm message

Review channel assignments

In oscilloscope menu, check 'Channel Configuration' and count how many measurement channels are assigned to the affected encoder device.

Do not modify settings while machine is in automatic operation

Reduce active channels

Deactivate unnecessary measurement channels or redistribute channels across multiple encoder devices to stay within hardware limits.

Most Heidenhain encoders support maximum 4-6 simultaneous oscilloscope channels

Reset and verify

Clear the alarm with CE key and restart oscilloscope function to verify channel configuration is within limits.

Check encoder interface specifications

Access 'Machine Parameters' via MOD key, review encoder interface parameters to identify maximum supported channels per device.

Look for parameters in 1xxx series related to encoder interface limits

Verify hardware configuration

In 'Diagnosis' menu, select 'Hardware Info' to check encoder interface module specifications and current channel usage.

Ensure machine is in safe state before accessing diagnostic menus

Redistribute channel load

Move some oscilloscope channels to alternative encoder interfaces or reduce total active channels to match hardware capabilities.

Consider using multiple measurement sessions instead of simultaneous channel monitoring

Review trigger settings

In oscilloscope menu, access 'Trigger Configuration' and check if multiple trigger sources are defined for the same encoder.

Each trigger source may consume an additional encoder channel

Simplify trigger conditions

Reduce trigger complexity by using single trigger source or external trigger instead of multiple encoder-based triggers.

Document current trigger settings before making changes

Optimize measurement setup

Configure oscilloscope to use shared trigger across multiple channels rather than individual triggers per channel.

Check encoder parameters

Access machine parameters via MOD key, review 1xxx series parameters for encoder channel allocation and limits.

Look specifically for parameters defining maximum channels per encoder interface

Verify oscilloscope parameters

Check diagnostic-related parameters that may limit oscilloscope channel usage per encoder device.

Only modify parameters if you have proper documentation and backup

Reset to defaults if needed

If parameters appear corrupted, restore encoder and diagnostic parameters to factory defaults and reconfigure as needed.