Response of the new version: The holding brake is no longer released for a short time when the PLC is restarted.
What happens? The holding brake is accidentally released for approx. 0.5s. As a result, hoists (active loads) may be slightly sagging.
When does the problem occur? The problem occurs if the PLC is restarted and the brake mode in the project is unlike the Lenze setting set to 'Control via device state machine' (0x2820.1=[0]).
Which products are affected? - i700 servo inverter ≤ V01.04.00.9125
Short-term measures/recommendations: The unexpected behaviour does not occur if 'Control via control word from ext. controller' (0x2820.1=[1]) is selected as holding brake mode in the parameter set of the i700.
The 'L_SMC_BrakeControl' function block for holding brake control must be integrated in the PLC program of the higher level controller.
Evaluation: The described behaviour only occurs under certain conditions. In particular, the brake mode setting in the project must differ from the Lenze setting.
