12710

Common Causes

• Use of unsupported G-code or M-code commands in external language mode that are not defined in Siemens syntax
• Attempt to use Lxx (label) language elements in external language mode where they are prohibited
• Mixing of language constructs or syntax from non-Siemens CNC programming formats
• Incorrect subprogram call syntax that does not conform to allowed external language elements
• Use of programming statements outside the permitted subset (subprogram calls and REPEAT/UNTIL constructs only)

Troubleshooting Steps

1. 1Review the part program at the specified channel and block number to identify the illegal language element causing the alarm
2. 2Verify that only subprogram call language elements and REPEAT (UNTIL) constructs are used in external language mode; remove any other G-code, M-code, or syntax elements
3. 3Check that Lxx label definitions and references are not present in the program, as these are not permitted in external language mode
4. 4Consult the machine's language reference documentation to confirm which language elements are allowed in external language mode for your specific control version
5. 5Correct the program syntax to conform to Siemens external language rules, recompile, and reload the part program before resuming operation