This plugin, originated by @a-luker, allows you to look at the logs in Vera plus a variety of other useful pieces of information, including info about any attached Zwave devices.
Very useful additions were also written by user @gengen, in particular the "ZShark" Z-Wave protocol interpreter. Verbose logging needs to be enabled for this feature to work. Note that Verbose logging without logging to USB, is not recommended for ongoing operation.
More information here: