What causes Heidenhain alarm 250-13A7?

Machine configuration parameter error related to the alarm function. Hardware component failure on the TNC control or connected module. Part program command or sequence not compatible with current machine state. Communication or interface fault between TNC and machine components. Machine tool builder specific configuration issue.

How do I fix Heidenhain alarm 250-13A7?

1. Note the complete alarm text displayed on the TNC screen including any parameter values. 2. Check the Heidenhain NC error message manual for alarm 250-13A7 for the specific remedy. 3. Power cycle the machine to clear transient faults. 4. Check for related alarms active simultaneously that may indicate the root cause. 5. Contact Heidenhain service or the machine tool builder if the alarm persists.

axismd.ai

Heidenhain Controller

Communication · Intermediate · 30-120 minutes

Alarm 250-13A7

Heidenhain 250-13A7 - Connection setup to DNC not possible

HEIDENHAIN alarm 250-13A7 occurs when the TNC control cannot establish a connection to the DNC (Distributed Numerical Control) system for file transfer operations. This is typically caused by network configuration issues, incorrect DNC settings in the TNC parameters, or communication protocol mismatches.

HeidenhainCommunicationIntermediate30-120 minutes

250-13A7

Heidenhain 250-13A7 - Connection setup to DNC not possible

Connection setup to DNC not possible

Root Cause Summary

HEIDENHAIN alarm 250-13A7 occurs when the TNC control cannot establish a connection to the DNC (Distributed Numerical Control) system for file transfer operations. This is typically caused by network configuration issues, incorrect DNC settings in the TNC parameters, or communication protocol mismatches.

Safety

Refer to Heidenhain service manual
Ensure qualified technician performs repairs

Causes and Fixes

1
Access Machine Parameters
Press MOD key, select 'Machine Parameters', navigate to MP7210 series (DNC Interface parameters).
Always backup current parameters before making changes
2
Verify DNC Protocol Settings
Check MP7210 (DNC protocol type) - should match DNC server configuration (0=LSV-2, 1=FTP, 2=SFTP).
Incorrect protocol selection will prevent all DNC communication
3
Validate Port Configuration
Verify MP7211 (DNC port number) matches the port configured on DNC server (typically 19000 for LSV-2).
4
Test Connection
Use PGM MGT > DNC > Test Connection to verify parameter changes resolve the alarm.

DIY Feasiblehigh confidence

Call a technician if:

·Network infrastructure changes required
·TNC hardware network interface failure suspected
·Complex enterprise DNC system integration needed

Prevention

Document all DNC parameter settings
Regularly test DNC connectivity
Coordinate with IT before network changes
Keep DNC server credentials updated

Common Mistakes

Forgetting to save parameters after changes
Mixing up LSV-2 and FTP protocol settings
Not checking both TNC and server-side configurations
Ignoring case sensitivity in usernames/passwords

Related Alarms

250-13A6 250-13A8 250-13A9

Seeing Multiple Alarms?

Seeing another alarm with this one? Enter the code.

Get machine-aware diagnosis

AxisMD logs alarms against your actual machines, tracks patterns, and gives AI context your manual doesn't have.

Start free

Was this guide helpful?

Always verify with your machine manual or a certified technician before performing service procedures.