Corrected from:
Inverter Drives 8400 StateLine V16.00.00
Inverter Drives 8400 HighLine V16.00.00
Inverter Drives 8400 TopLine V16.00.00
Inverter Drives 8400 protec HighLine V16.00.00
Response of the new version:
The flying restart circuit works properly, even after a short-time undervoltage.
What happens?
If a short-time undervoltage is detected, the flying restart circuit does not become active. As a result, the inverter is connected to a running motor without sychronisation. This may lead to a clamp disconnection.
When does this behaviour occur?
The behaviour occurs after a short-time undervoltage disconnection if the flying restart circuit is activated and the inverter is connected to a running machine. The auto-start function must be set to C0142/bit 3 = 0 ("Inhibit at undervoltage" is not active).
Which products are affected?
Inverter Drives 8400 StateLine FW < V16.00.00
Inverter Drives 8400 HighLine FW < V16.00.00
Inverter Drives 8400 TopLine FW < V16.00.00
Inverter Drives 8400 protec HighLine FW < V16.00.00
Short-term measures:
- After inhibiting the controller and enabling it again, the error has been corrected
The error can be removed by means of the following function block interconnection:
- Assign bMctrlUVDeteected of the LS_DeviceMonitor SB to the L_Transient_1* FB
- Select "Low edge" and a pulse duration of e.g. 0.5s for L_Transient_1
- Assign the L_Tansient output to bCinh LA_Ncrl
Evaluation/recommendations:
Connection to a running machine and the resulting clamp disconnections (OC1) may reduce the service life of the inverter.
