Corrected from:
i700 servo inverter, V2: from V02.10.12.11906
i700 servo inverter, V1: from V01.10.12.11905
Response of the new version:
The motor overtemperature fault (0x4380) will no longer be triggered if an open circuit or a sensor error has been detected at around the same time.
If parameterised accordingly, in the case of class 2 faults, the controller will only be inhibited after the machine has been stopped via the QSP function.
What happens?
For so called 'class 2 faults', quick stop (QSP) can be optionally set as fault response. In this case, the controller shall not be inhibited immediately, but the machine shall be decelerated to standstill first.
In practical operation, this setting does, however, not have any effect because the encoder cable (open circuit) monitoring and the overtemperature monitoring in the motor respond at the same time and trigger a corresponding fault. The fault response leads to an immediate controller inhibit. In this way, the machine will not be decelerated via the QSP function first.
When does this behaviour occur?
The behaviour occurs if the open-circuit monitoring functions for the encoder and the temperature sensor respond.
Which products are affected?
i700 servo inverter, V2
i700 servo inverter, V1
Short-term measures:
None.
Evaluation/recommendations:
An open circuit/interruption of the temperature sensor cable frequently occurs in combination with an interruption of the encoder cable.
E.g. if the SubD plug has been removed or if the entire encoder cable has been cut.
If occurring, it will, however, be at any rate ensured that the controller is inhibited.
