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Siemens SINUMERIK Controller
Program/G-code · Intermediate · 30-120 minutes
Siemens 840D 100938 - Delete a connection in menu Start-up>>Log.drive>>Conn.
Alarm 100938 is an informational/instructional message indicating that a logical drive connection must be deleted through the Start-up menu before proceeding with a configuration change. This occurs when attempting to modify or reconfigure drive assignments while existing connections are still active in the system configuration.
Siemens 840D 100938 - Delete a connection in menu Start-up>>Log.drive>>Conn.
Delete a connection in menu Start-up>>Log.drive>>Conn.
Siemens SINUMERIK operator message 100938: Delete a connection in menu Start-up>>Log.drive>>Conn. This is an informational message from the SINUMERIK control indicating a system status or operation result that may require operator action.
Root Cause Summary
Alarm 100938 is an informational/instructional message indicating that a logical drive connection must be deleted through the Start-up menu before proceeding with a configuration change. This occurs when attempting to modify or reconfigure drive assignments while existing connections are still active in the system configuration.
Safety
Causes and Fixes
Navigate to Start-up >> Log.drive >> Conn. menu in the HMI interface
Identify the conflicting drive connection in the connection list that needs to be removed
Select the specific connection entry and use the Delete function to remove it
Ensure you are deleting the correct connection as this will remove the logical assignment between axis/spindle and drive
Confirm deletion and perform a power cycle (Power OFF/ON) to activate the configuration change
Save any critical machine data before power cycling the control
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