Siemens SINUMERIK codes
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Siemens SINUMERIK Controller

Servo/Axis · Basic · 10-20 minutes

Alarm 15300

Siemens 840D 15300 - Channel block invalid number-of-passed-blocks during block

In the function "Block search with calculation" a negative number of passes has been entered in column P (number of passes). The permissible range of values is P 1 - P 9 999.

Siemens SINUMERIKServo/AxisBasic10-20 minutes

15300

Siemens 840D 15300 - Channel block invalid number-of-passed-blocks during block

Channel block invalid number-of-passed-blocks during block

In the function "Block search with calculation" a negative number of passes has been entered in column P (number of passes). The permissible range of values is P 1 - P 9 999.

Safety

  • Refer to Siemens documentation
  • Ensure qualified technician performs repairs

Common Causes

  • Negative value entered in column P (number of passes) in block search function
  • Incorrect manual input of pass count during block search operation
  • Program editing error where P parameter received invalid syntax or negative sign
  • Memory corruption or data entry glitch affecting P parameter interpretation
  • Incompatible or outdated CAM post-processor generating invalid P values

Troubleshooting Steps

  1. 1Review the block search program at the indicated channel and block number; verify column P contains only positive integers between 1 and 9999
  2. 2Re-enter the number of passes manually in column P, ensuring no negative sign or special characters are present
  3. 3Check the CNC program source file and regenerate from CAM if applicable; verify post-processor settings output valid P parameter syntax
  4. 4Clear the block search function and restart the operation with corrected P value
  5. 5If error persists after correction, perform a soft reset of the control and reload the program

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