Is there a possibility to read parameters when the network is lost. Is there a memory of last parameters after switching off?
When the communication drops you can read parameters by the HMI port (port on left side). You can read by an HMI, SoMove or PLC different parameters on the left port like register 466 (current), 451, 452, 453 (registers of fault).
When the product even if you switch off the product, the product stores the parameters and you can read last diagnostic on the product. On powersuite for example you have a menu historic when you are online to know what are the last faults on the product.