Haas codes
AxisMD

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Haas Controller

System · Intermediate · 10-20 minutes

Alarm 250

Haas 250 - PROG DATA ERROR | Haas CNC Alarm

This alarm indicates the control detected a syntax error, invalid G-code command, or out-of-range parameter value while reading program data from memory or during file transfer. The MOCON board parses each line of G-code before execution and will halt if it encounters data it cannot interpret or values that violate machine limits. This typically occurs during program upload via RS-232, USB, or network transfer with corrupted data.

HaasSystemIntermediate10-20 minutes

250

Haas 250 - PROG DATA ERROR | Haas CNC Alarm

PROG DATA ERROR

This alarm indicates the control detected a syntax error, invalid G-code command, or out-of-range parameter value while reading program data from memory or during file transfer. The MOCON board parses each line of G-code before execution and will halt if it encounters data it cannot interpret or values that violate machine limits. This typically occurs during program upload via RS-232, USB, or network transfer with corrupted data.

Safety

  • Arc will not cut

Common Causes

  • Corrupted G-code file transfer due to bad RS-232 cable, incorrect baud rate settings, or communication errors during upload
  • Invalid characters or formatting introduced by editing programs on a PC with incompatible text editor that adds hidden control characters
  • Program line contains parameter values exceeding machine axis travel limits or spindle speed maximum defined in Settings
  • Memory corruption in the MOCON compact flash card or RAM storing program files due to improper shutdown or power loss during write operations
  • Attempt to run a program created for a different machine type with unsupported G-code commands or macro variables not recognized by the control

Troubleshooting Steps

  1. 1Step 1: Press RESET and review the program line number displayed with the alarm to identify the exact line containing the error in the G-code
  2. 2Step 2: Navigate to the Edit mode, cursor to the reported line number, and inspect for obvious syntax errors, missing decimal points, or out-of-range values
  3. 3Step 3: If the program was recently transferred, delete it from control memory and re-transfer using verified RS-232 settings or a different USB drive known to work
  4. 4Step 4: Open the program file on a PC using a plain text editor and check for unusual characters, ensure line endings are correct, and verify file is not corrupted
  5. 5Step 5: Compare the command causing the fault against the Haas Programming Manual to confirm it is valid and parameters are within documented ranges for your control software version
  6. 6Step 6: If multiple programs show random data errors and re-transfer does not resolve, backup all programs and perform a compact flash card check or replacement through Haas service

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