Code 16112: [Channel %1: ] Block %2 foll owing spindle %3 Impermissible programming
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical [Channel %1: ] Block %2 foll owing spindle %3 Impermissible programming 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 = Spindle Diagnostics Manual (DAsl), 03/2009 Definitions: With synchronous spindle-VV-coupl ing an additional motion for the following spindle can only be programmed with M3, M4, M5 and S... The paths creat ed by specified positi ons cannot be maintained safely for a velocity coupling, especially if a posit ion control is missing. If dimensional accuracy or reproducibility are not important, the alarm can be suppressed with MD11410 $MN_SUPPRESS_ALARM_MASK Bit27 = 1. Reaction: Correction block is reorganized. Interface signals are set. Alarm display. Remedy: Use synchronous spindle-DV-coupling or pr ogram direction of rotation and speed. 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 16112 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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