Code 330-00BD: CC%2 error in cut-out channel STO.A.x (-STO.B.P.x) axis
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical CC%2 error in cut-out channel STO.A.x (-STO.B.P.x) axis 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
group A [Cause of error] The cutout channel test detected a fault: The CC-specific pulse release for the corresponding power modules of the NC axis group (A) over the A channel is defective. The ready signal RDY for one axis group is missing. The cutout channel STO.A.x was switched to inactive for the test of the cutout channel STO.B.x for all power modules. At least one of the acknowledgment signals for this cutout channel has the wrong condition, i.e. when - At least one power module reports “No readiness” (RDY.x=0), although “Readiness“ (RDY.x=1) is expected for all power modules of the axis group of the CC. [Error correction] - Check the wiring (e.g. pulse release X72 of the supply module, X73 Heidenhain interface PCB, PWM cable is defective) - Exchange defective hardware (power module) - Inform your service agency 10/2023 [1175]
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 330-00BD 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.
Have a better solution?
Help the industrial community by sharing your repair experience for code 330-00BD.
Need a searchable reference for more Heidenhain TNC Series CNC manuals?
We structure equipment manuals into searchable code, title, cause, solution, safety note, and source-reference data. Send a PDF and example searched codes when you need public pages, private search, or structured exports.
Space reserved for Google AdSense / Industrial Affiliate Links
Monetization target for 2026