Heidenhain codes
HeidenhainParameterIntermediate30-120 minutes

250-13A9

HEIDENHAIN 250-13A9 - Connection setup to DNC not possible

Connection setup to DNC not possible

The DNC connection cannot be established. TeleService parameters are improperly configured, blocking remote access.

Root Cause Summary

Alarm 250-13A9 occurs when the TNC control cannot establish a DNC (Distributed Numerical Control) connection due to misconfigured TeleService machine parameters. This typically involves incorrect network settings, communication protocol parameters, or TeleService configuration in the machine parameter tables.

Safety

  • Refer to Heidenhain service manual
  • Ensure qualified technician performs repairs

Causes and Fixes

  1. 1

    Access Machine Parameter Menu

    Press MOD key, select 'Machine Parameters', navigate to TeleService parameters MP7210-MP7219.

    Document current parameter values before making changes

  2. 2

    Verify IP Configuration

    Check MP7210 (TeleService IP address) and MP7211 (subnet mask) match your network configuration.

    Incorrect IP settings can cause network conflicts

  3. 3

    Validate Port Settings

    Verify MP7212 (TeleService port) is not blocked by firewall and matches DNC server configuration.

    Standard TeleService port is 19000, but may vary by installation

  4. 4

    Reset TeleService

    Set MP7219 (TeleService reset) to 1, then back to 0 to reinitialize the connection.

    This will temporarily disconnect all active TeleService sessions

DIY Feasiblehigh confidence

Call a technician if:

  • ·Network infrastructure changes required
  • ·TeleService license issues
  • ·Multiple parameter sets need coordination

Prevention

  • Document all network parameter changes
  • Regularly backup machine parameters
  • Monitor TeleService server status
  • Keep firewall exceptions updated

Common Mistakes

  • Forgetting to restart control after parameter changes
  • Not checking physical network connections first
  • Configuring wrong protocol type
  • Overlooking firewall blocking

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