100351

Check Current Protection Level

Navigate to Diagnostics > Service > Protection Level and verify current access level. Display MDs typically require protection level 2 (SIEMENS) or higher.

Use password 'SUNRISE' for protection level 2 access on most SINUMERIK systems

Verify MD Protection Status

In Commissioning > Machine Data, locate the specific display MD and check its protection level indicator. Look for lock symbols or protection level numbers.

Never attempt to bypass protection levels without proper authorization

Access with Proper Authorization

Enter correct password for required protection level via Settings > Protection Level, then retry the MD modification.

Protection level changes are logged in the system logbook for audit purposes

Check NCK Operating State

Verify NCK state in Diagnostics > NCK > Operating State. Ensure system is in STOP or RESET mode, not in automatic operation or program execution.

Use NC Stop button to safely transition to compatible operating state

Clear Active Programs

Cancel any running programs via Program > Reset or press RESET key. Ensure no background processes are active in any channels.

Ensure workpiece and tooling are in safe position before resetting

Verify Channel States

Check all channel states in Diagnostics > Channels. All channels must be inactive or in reset state before display MD modifications.

Multi-channel systems require all channels to be in compatible states

Validate Parameter Range

Check the display MD value against acceptable ranges in Commissioning > Machine Data. Verify values like $MN_DISPLAY_RESOLUTION are within supported limits.

Use F1 help in MD editor to view acceptable value ranges and data types

Check Data Type Compatibility

Ensure entered value matches required data type (INTEGER, REAL, STRING). Display MDs often require specific formats for resolution and timing parameters.

Incorrect data types can cause system instability

Verify Hardware Compatibility

Confirm display MD values are compatible with installed HMI hardware. Check PCU type and display capabilities in Diagnostics > Hardware Configuration.

Different PCU versions support different display resolutions and refresh rates

Check System Memory Usage

Navigate to Diagnostics > System > Memory Usage and verify available NCK memory. Display MDs may require additional memory allocation.

Clear unnecessary user programs and data to free up NCK memory

Review Active Display Configurations

Check existing display configurations in Commissioning > HMI > Display Settings for conflicts with new MD values.

Multiple high-resolution displays can exceed system capabilities

Restart NCK Services

Perform controlled NCK restart via Startup > NCK > Restart to clear resource conflicts and reinitialize display subsystem.

Save all work and ensure safe machine state before NCK restart