Siemens SINUMERIK codes
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Siemens SINUMERIK Controller

Program/G-code · Intermediate · 15-30 minutes

Alarm 16000

Siemens 16000 - Block invalid value for lifting direction

SIEMENS alarm 16000 'Channel Not Ready' occurs when the NC kernel cannot establish proper communication with essential system components during startup or after reset. This critical fault typically stems from hardware communication failures, corrupted system data, or improper channel configuration preventing the NC from reaching operational state.

Siemens SINUMERIKProgram/G-codeIntermediate15-30 minutes

16000

Siemens 16000 - Block invalid value for lifting direction

Block invalid value for lifting direction

During the "rapid lift from contour" (keyword: LIFTFAST), a code value for the lifting direction (keyword: ALF=.) which lies outside the permissible range (permissible value range: 0 to 8) was programmed. With active cutter radius compensation: Code numbers 2, 3 and 4 cannot be used in G41 Code numbers 6, 7 and 8 cannot be used in G42 because they code the direction to the contour Control reaction: Correction block is reorganized. Interface signals are set. Alarm display.

Root Cause Summary

SIEMENS alarm 16000 'Channel Not Ready' occurs when the NC kernel cannot establish proper communication with essential system components during startup or after reset. This critical fault typically stems from hardware communication failures, corrupted system data, or improper channel configuration preventing the NC from reaching operational state.

Safety

  • Only qualified personnel should diagnose and clear control alarms; follow the machine builder's safety procedures and lockout/tagout where hardware work is required.

Causes and Fixes

  1. 1

    Check PLC Connection Status

    Navigate to Diagnostics > Hardware > PLC Status and verify PLC communication state. Check for red status indicators or timeout messages.

    Use diagnostic buffer DB31 to check for PLC communication error codes

  2. 2

    Verify System Bus Parameters

    Access Service > System Data > Communication and check parameters MD10000 (NCK_PLC_COMM_MODE) and MD10010 (PLC_COMM_TIMEOUT). Reset to default if corrupted.

    Backup system data before modifying communication parameters

  3. 3

    Perform Communication Reset

    Execute 'Reset NCK-PLC Communication' from Service menu, then perform NC Start sequence to reinitialize channel communication.

    Monitor alarm buffer during reset to identify specific communication failure points

DIY Feasiblemedium confidence

Call a technician if:

  • ·Hardware LED indicators show red fault status
  • ·Multiple drive systems simultaneously fault
  • ·File system corruption cannot be repaired
  • ·Safety system integration issues

Prevention

  • Perform regular system data backups
  • Monitor drive communication quality weekly
  • Keep NCK memory usage below 80%
  • Schedule periodic file system maintenance

Common Mistakes

  • Modifying communication parameters without backup
  • Ignoring drive ready status during startup
  • Clearing alarms without addressing root cause
  • Operating with insufficient NCK memory

Related Alarms

16001160102500025010380001

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Always verify with your machine manual or a certified technician before performing service procedures.