Sure you can. PcVue station will serve the mobility part and be connected as a client to the existing SCADA. You may use standard connection like OPC for instance to collect the data from your SCADA. However you may need to recreate mimics to be displayed in SnapVue.
Yes, in the project folder of the PC with the Instant Messaging Backend role (where the MSG server is running). Some messages are also cached on the client devices (in the TMP directory of PcVue, and in the local database for mobile app)
It depends a lot on the manufacturer. Some of them may work during 3+ year , some are wired and do not require battery at all. Accuracy is about 2 or 3 meters and could be sometimes up to 5m.
