Code 605-0358: Starting block of channel <%2> cannot be reached because
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Starting block of channel <%2> cannot be reached because 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
other channels are already waiting at the sync. point %1 [Cause of error] The starting blocks were set on the individual channels in such a manner that, because of sync. points, they cannot be reached. [Error correction] Cancel the mid-program startup, and set the starting block before the sync. point. 10/2023 [1235]
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 605-0358 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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