Siemens SINUMERIK codes
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Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 20-45 minutes

Alarm 12370

Siemens 840D 12370 - Channel block range of values not permissible

A variable has been initialized with a value range outside an initialization block. The definition of program-global variables is allowed only in special initialization blocks. These variables can be initialized with a value range.

Siemens SINUMERIKServo/AxisIntermediate20-45 minutes

12370

Siemens 840D 12370 - Channel block range of values not permissible

Channel block range of values not permissible

A variable has been initialized with a value range outside an initialization block. The definition of program-global variables is allowed only in special initialization blocks. These variables can be initialized with a value range.

Safety

  • Refer to Siemens documentation
  • Ensure qualified technician performs repairs

Common Causes

  • Variable declaration with value range attempted outside of initialization block in program structure
  • Incorrect syntax or placement of variable initialization statements in main program body
  • Missing or improperly defined initialization block header for program-global variable declarations
  • Value range syntax error in variable definition (incorrect brackets, operators, or formatting)
  • Mixing local and global variable declarations without proper block separation

Troubleshooting Steps

  1. 1Review the NC program syntax at the specified block location - verify all program-global variable declarations are contained within dedicated initialization blocks only
  2. 2Check initialization block structure and confirm proper block delimiters are used according to 840D/828D documentation standards
  3. 3Verify the value range syntax matches permissible format (e.g., MIN..MAX notation) and uses correct brackets and separators
  4. 4Separate any variable declarations found in the main program body and move them to the appropriate initialization section at program start
  5. 5Consult the program listing at channel %1, block %2 and compare against manufacturer syntax guidelines for variable range initialization

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