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Code 14710: [Channel %1: ] Block %2 error in initialization sequence in function %3

Issue Description & Safety Warning

The Siemens SINUMERIK 840D CNC has triggered a critical [Channel %1: ] Block %2 error in initialization sequence in function %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 = Block number, label %3 = Identifier of the function which caused the error Definitions: Initialization blocks are generated (or not) after control power-up, (program) RESET and (program) START, depending on the settings in machine data MD20110 $MC_RESET_MODE_MASK and MD20112 $MC_START_MODE_MASK. Errors can occur because of incorrect machine data settings. The errors are output with the same error messages as would appear if the function had been incorrectly programmed in the part program. This alarm is also generated in order to indicate th at an error relates to the initialization sequence. Parameter %3 specifies which function triggers the alarm: Control power-up and (program) RESET: Value: 0: Error during synchronization preprocessing/main run 1: Error on selection of tool length compensation 2: Error on selection of transformation 3: Error on selection of work offset The macro definitions and cycle interfaces are also read in during the power-up procedure. If an error occurs here, this is indicated by value = 4, or value = 5 6: Error creating 2 1/2 D protection zones during power up. (Program) START: Value 100: Error during synchronization preprocessing/main run 101: Error on selection of tool length compensation 102: Error on selection of transformation 103: Error on selection of synchronized spindle 104: Error on selection of work offset Particularly when tool management is active, it is po ssible that a tool on the spindle or the toolholder is disabled but still needs to be activated. These tools are automatically activated on RESET. On START, machine data MD22562 $MC_TOOL_CHANGE_ERROR_ MODE can be used to specify whether an alarm is to be generated or an automatic bypass strategy selected. If the parameter contains 3 values from 200 to 203, this means that an insufficient number of NC blocks is available for NC block preparation on certain commands (ASUB start, overstore selection, teach-in). Remedy: Increase machine data MD28070 $MC_MM_NUM_BLOCKS_IN_PREP. Reaction: Interpreter stop Channel not ready. NC Start disable in this channel. Interface signals are set. Alarm display. Remedy: Please inform the authorized personnel/service department. If parameter %3= 0 -3: If the alarm or alarms occur on RESET: Check the settings of machine data MD20110 $MC_RESET_MODE_MASK, MD20120 $MC_TOOL_RESET_VALUE, MD2012 1 $MC_TOOL_PRESEL_RESET_VALUE, MD20122 $MC_TOOL_RESET_NAME (only if tool management is active), MD20130 $MC_CUTTING_EDGE_RESET_VALUE, MD20132 $MC_SUMCORR_RESET_VALUE, MD20126 $MC_TOOL_CARRIER_RESET_VALUE, MD20150 $MC_GCODE_RESET_VALUES, MD 20154 $MC_EXTERN_GCODE_RESET_VALUES, MD20140 $MC_TRAFO_RESET_VALUE, MD21330 $MC_COUPLE_RESET_MODE_1, MD24002 $MC_CHBFRAME_RESET_MASK If parameter %3= 100 - 104: Check the setting of MD20112 $MC_START_MODE _MASK and the machine data specified under '..._RESET_...'. If tool management is active, if nec essary remove the tool stated in the associated alarm from the toolholder/spindle and cancel the 'disabled' status. If parameter %3= 4 or 5: Check macro definitions in _N_DEF_DIR Check cycle directories _N_CST_DIR and _N_CUS_DIR If parameter %3= 6: Alarm 18002 or 18003 was also issued. This alarm co ntains the number of the incorrectly defined protection zone and an identifier of what is incorrect abo ut the protection zone. The system variables must be appropriately corrected. If Parameter %3= 200 bis 203: Increase MD28070 $MC_MM_NUM_BLOCKS_IN_PREP. Program Continuation: Clear alarm with the RESET key. Restart part 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 14710 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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