Code 17820: [Channel %1: ] JOG to position not possible for axis %2, reason %3
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical [Channel %1: ] JOG to position not possible for axis %2, reason %3 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 = Channel number %2 = Axis name, spindle number %3 = Cause Definitions: A 'JOG to position' has been requested for an axis. This is not possible because: Reason 1: The axis is involv ed in the active transformation. Reason 2: The axis is a follow ing axis in an active coupling. The JOG to position will therefore not be executed. Reaction: Interface signals are set. Alarm display. Diagnostics Manual (DAsl), 03/2009 Remedy: Deselect 'JOG to position', or previously deselect the transform ation with TRAFOOF or disband the coupling. Program Continuation: Clear alarm with the Delete key or NC START.
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 17820 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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