Code 221-002F: Inconsistent configuration for implicit SQL access
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Inconsistent configuration for implicit SQL access 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
in the interpreter [Cause of error] The configuration data that determine how the interpreter implicitly accesses SQL tables are inconsistent. (These configuration data are accessible only to the control manufacturer) [Error correction] Correct the configuration data: - The tables (id50Table etc.) given in CfgChannelSysData for the corresponding channel must exist. - An entity CfgSysDataTable with the corresponding key must exist for the columns (id50Columns etc.). - For every entry in the Attribute column of the entity CfgSysDataTable, an entity CfgSysDataColumn with the corresponding key must exist. [278] 10/2023
Source: HEIDENHAIN NC Error Messages — TNC7/640/620/320/128, CNC PILOT 640, MANUALplus 620 (10/2023)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Heidenhain TNC Series CNC Alarms
Heidenhain controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 221-002F on the TNC Series CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Heidenhain's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 4497 Heidenhain TNC Series CNC codes.
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