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Siemens SINUMERIK Controller
Program/G-code · Intermediate · 30-120 minutes
Siemens 840D 104238 - Empty location found
Alarm 104238 indicates that the control system has detected an empty or undefined memory location during program execution or data access. This typically occurs when the NC program references a variable, parameter, or memory address that has not been initialized or contains no valid data. The alarm serves as an informational message to alert the operator that a referenced location lacks expected content.
104238
Siemens 840D 104238 - Empty location found
Empty location found
Siemens SINUMERIK operator message 104238: Empty location found. This is an informational message from the SINUMERIK control indicating a system status or operation result that may require operator action.
Root Cause Summary
Alarm 104238 indicates that the control system has detected an empty or undefined memory location during program execution or data access. This typically occurs when the NC program references a variable, parameter, or memory address that has not been initialized or contains no valid data. The alarm serves as an informational message to alert the operator that a referenced location lacks expected content.
Safety
- Refer to Siemens documentation
- Ensure qualified technician performs repairs
Causes and Fixes
- 1
Check the alarm detail for parameter %1 to identify which memory location or variable number is empty.
- 2
Review the NC program at the line where the alarm occurred and identify all R-parameters or variables being referenced.
- 3
Add initialization statements (e.g., R10=0) at the program start or before first use of the identified variable.
- 4
Reset the alarm, restart the program, and verify that all variables are properly initialized before use.
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