Code 16700: [Channel %1: ] Block %2 axis %3 invalid feed type
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical [Channel %1: ] Block %2 axis %3 invalid feed type 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 = Block number, label %3 = Axis name, spindle number Definitions: In a thread cutting function, the feed has b een programmed in a unit that is impermissible. G33 (thread with constant lead) and the f eed have not been programmed with G94 or G95. G33 (thread with constant lead) is active (modal) and G63 is progr ammed additionally in a following block. (Conflict situation! G63 is in the 2nd G group, G33, G331 and G332 are in the 1st G group). G331 or G332 (rigid tapping) and the feed have not been programmed with G94. Reaction: Correction block is reorganized. Interface signals are set. Alarm display. Remedy: Use only the feed type G94 or G95 in the thread cutting functions. After G33 and before G63, deselect t he thread cutting function with G01. Diagnostics Manual (DAsl), 03/2009 Program Continuation: Clear alarm with NC ST ART or RESET key and continue the program.
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 16700 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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