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Siemens SINUMERIK Controller
Program/G-code · Intermediate · 30-120 minutes
Siemens 101155 - Path does not exist
Alarm 101155 occurs when the control system attempts to access a file path that does not exist in the system directory structure. This typically happens during file operations such as saving boot files, archiving data, or executing program commands that reference invalid directories. The issue can stem from corrupted path configurations, missing directories after system restore, or incorrect path syntax in NC programs or PLC code.
101155
Siemens 101155 - Path does not exist
Path does not exist
During a file function, e.g.saving boot files, an attempt was made to access a non-existent path
Root Cause Summary
Alarm 101155 occurs when the control system attempts to access a file path that does not exist in the system directory structure. This typically happens during file operations such as saving boot files, archiving data, or executing program commands that reference invalid directories. The issue can stem from corrupted path configurations, missing directories after system restore, or incorrect path syntax in NC programs or PLC code.
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
Access HMI in Service mode and navigate to Commissioning > System Data > Directory Structure to verify the path referenced in the alarm (check %1 parameter for specific path).
- 2
Using the integrated file manager or WinSCP via Ethernet, browse to the expected path location (typically under /user/, /oem/, or /addon/) to confirm if directory exists.
- 3
Recreate the missing directory with exact naming convention using HMI file browser or SSH/Telnet commands (mkdir command). Ensure proper capitalization as Linux file system is case-sensitive.
Do not create directories in protected system areas (/siemens/sinumerik/) without OEM documentation
- 4
Perform NCK Reset (Power ON in position 3) or complete control restart to reinitialize directory structure and clear alarm.
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Always verify with your machine manual or a certified technician before performing service procedures.