The device connected via LAN does not communicate after restarting the PC, it is necessary to perform autodetection again.
Clarity stores the IP address of the device detected during autodetection in the configuration and if it changes, it is unable to communicate with the device. Some devices use IP adress assigned by DHCP server in default settings.
If the system is connected directly to the computer or via a switch, it is necessary to set static IP addresses in the devices and in the LAN card in the computer (preferred solution). Refer to the device manual or contact device manufacturer/supplier for how to change the device setting to a static IP address.
If the system is connected directly to the computer via router, it is possible to use DHCP IP address assignment, but you must ensure that the assigned IP addresses do not change. The same applies for connections via an internal network, where the cooperation of the network administrator is required to set the IP address.