What causes Siemens SINUMERIK alarm 4632?

Machine data was changed requiring acknowledgment or power cycle. System configuration change notification. Commissioning or service operation generated this notice. Axis or drive configuration change affecting machine data.

How do I fix Siemens SINUMERIK alarm 4632?

1. Read the complete notice text on the SINUMERIK screen. 2. If a power cycle is indicated, perform a controlled machine power off and restart. 3. If machine data backup is indicated, save the current machine data. 4. Acknowledge the notice and verify the system is operating correctly after the change. 5. Consult the machine commissioning engineer if the notice is unexpected.

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Siemens SINUMERIK Controller

Communication · Intermediate · 30-120 minutes

Alarm 4632

Siemens 840D 4632 - Logical PROFIBUS handwheel slot base address for handwheel not

Alarm 4632 fires when the NCK cannot resolve the logical PROFIBUS handwheel slot base address for a configured handwheel module. This occurs because the address specified in $MN_HANDWHEEL_LOGIC_ADDRESS[] array does not correspond to an actual PROFIBUS slot allocation in the machine data configuration, breaking the communication path between the 840D controller and the handwheel interface.

Siemens SINUMERIKCommunicationIntermediate30-120 minutes

4632

Siemens 840D 4632 - Logical PROFIBUS handwheel slot base address for handwheel not

Logical PROFIBUS handwheel slot base address for handwheel not

Root Cause Summary

Alarm 4632 fires when the NCK cannot resolve the logical PROFIBUS handwheel slot base address for a configured handwheel module. This occurs because the address specified in $MN_HANDWHEEL_LOGIC_ADDRESS[] array does not correspond to an actual PROFIBUS slot allocation in the machine data configuration, breaking the communication path between the 840D controller and the handwheel interface.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Access Diagnostics > Machine Data > Handwheel Configuration. Locate $MN_HANDWHEEL_LOGIC_ADDRESS[%1] and note the logical base address value.
2
Navigate to Commissioning > PROFIBUS > IO Configuration and verify that a PROFIBUS slot with matching logical base address exists and is assigned to the handwheel module. Cross-reference against $MN_HANDWHEEL_MODULE index.
If no matching slot exists, the address in $MN_HANDWHEEL_LOGIC_ADDRESS must be corrected or a new PROFIBUS IO slot must be created.
3
Correct the logical address in machine data to match the actual PROFIBUS slot base address, then perform a cold restart (mode: Editor, press CTRL+SHIFT+DEL to clear NCK memory).
Improper restart may leave corrupted cache; use full power cycle if cold restart fails.
4
After restart, verify handwheel communication in Diagnostics > PROFIBUS > Module Status. Confirm the handwheel slot shows 'Ready' or 'Online' status.

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