What causes Siemens SINUMERIK alarm 100916?

Part program contains an illegal or unsupported command for the current machine configuration. Parameter or machine data setting incompatible with the commanded operation. Required option or function not enabled on this SINUMERIK control. Incorrect axis assignment or configuration for the commanded function. Software version or compile cycle version mismatch.

How do I fix Siemens SINUMERIK alarm 100916?

1. Note the full alarm message including any parameter values shown (e.g., axis number, block number, channel). 2. Identify the program block or operation that triggered the alarm. 3. Review the SINUMERIK alarm manual for alarm 100916 to identify the specific cause and remedy. 4. Check the relevant machine data parameters referenced in the alarm. 5. If the alarm persists after correcting the program, contact Siemens technical support with the full alarm text and machine data backup.

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Siemens SINUMERIK Controller

Communication · Intermediate · 30-120 minutes

Alarm 100916

Siemens 840D 100916 - Remote diagnostics: Error 06 -synchronizeRemote()-

Alarm 100916 indicates a communication synchronization failure in the Siemens remote diagnostics system (VPN/Teleservice). This error occurs when the remote diagnostics client cannot properly synchronize data with the control system, typically due to network connectivity issues, firewall blockages, or incompatible software versions between the local control and remote diagnostic application.

Siemens SINUMERIKCommunicationIntermediate30-120 minutes

100916

Siemens 840D 100916 - Remote diagnostics: Error 06 -synchronizeRemote()-

Remote diagnostics: Error 06 -synchronizeRemote()-

Root Cause Summary

Alarm 100916 indicates a communication synchronization failure in the Siemens remote diagnostics system (VPN/Teleservice). This error occurs when the remote diagnostics client cannot properly synchronize data with the control system, typically due to network connectivity issues, firewall blockages, or incompatible software versions between the local control and remote diagnostic application.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Verify physical network connection (Ethernet cable, switch ports) and check link status LEDs on NCU/TCU and network equipment.
2
Check firewall settings on both local PC and customer network - ensure ports 102 (S7 communication), 5900 (VNC), and required Teleservice ports are open and bidirectional.
Coordinate with customer IT department before modifying firewall rules.
3
Test basic network connectivity using PING to the NCU IP address, then verify S7 communication using Siemens TIA Portal or STEP 7 online diagnostics.
4
If using VPN (Scalance SC or third-party), verify VPN tunnel is established and stable - check VPN gateway logs and re-establish connection if necessary.

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