Code 4632: Logical PROFIBUS handwheel slot base address for handwheel %1 not found
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical Logical PROFIBUS handwheel slot base address for handwheel %1 not found alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Parameters: %1 = Handwheel number Definitions: For PROFIBUS/PROFINET only: The logical basic address of the PROFIB US handwheel slot in machine data array $MN_HANDWHEEL_LOGIC_ADDRESS[] indexed in machine data $MN_HANDWHEEL_MODULE was not found in the current STEP 7 hardware configuration. Reaction: Interface signals are set. Alarm display. Remedy: Check if MD11351 $MN_HANDWHEEL_MODULE of the corresponding handwheel is correct. Check if indexed logical base address of PROFIB US handwheel slot in machine date array MD11353 $MN_HANDWHEEL_LOGIC_ADDRESS[] is correct. Program Continuation: Switch control OFF - ON.
Source: SINUMERIK 840D sl / 840Di sl / SINAMICS S120 Diagnostics Manual (DAsl, 03/2009)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Siemens SINUMERIK 840D CNC Alarms
Siemens controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 4632 on the SINUMERIK 840D CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Siemens's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 4014 Siemens SINUMERIK 840D CNC codes.
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