Applicable Systems
TwinCAT NC
Symptoms
No valid TwinCAT license is available. The system operates in restricted mode or stops.
Possible Causes
- License not installed or has expired
- License hardware dongle not connected
Troubleshooting Steps
- Step 1: Check the TwinCAT license status in the System Manager
No valid license found - Step 2: Install or renew the TwinCAT license
License is valid after installation
How to Reset
To reset: Install a valid TwinCAT license and restart the system service.
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Source: Beckhoff TwinCAT System Manual, Beckhoff Automation
Category: PLC & VFD
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