Hi Praveen,
For 1 question?
Yes its possible, MII can be integrate with another MII system.
Method 1. Suppose you want implement MII in two plants, then install MII in two place and make one overall Backend DB (i.e. MSSQL or MaxDB, Sybase etc.,) for both of it. Through Data services, you can connect Database.
Method 2. You can connect one to another MII with Virtual server Configuration. For more information go through below link
SAP Library - SAP Manufacturing Integration and Intelligence
For 2 Question:
MII is the one which bring real time data from shop floor with number of additional features. SAP MII has a feature Data Services which allow to connect any third party system to fetch data.
A connector can be thought of as the programmatic interface to a back-end data source such as a plant historian, an HMI or SCADA system, an I/O device, an MES or ERP system, or a relational database. The connectors included in your system will vary, but fall into one of the following
Categories:
Tag- Used to access historian, human-machine interface (HMI, SCADA, and I/O systems)
SQL- Used to access relational data in a wide range of database sources
Alarm- Used to access alarm/event management systems (HMI, building automation, network management, etc.)
XML- Used to access static or dynamic XML content (typical interface to ERP and related systems)
Aggregate- used to take data from multiple queries and combine them into a single document.
OLAP- used to query data from data warehouse, or cubed data, using MDX query syntax
SAP MII Business Logic Services- used to run an SAP MII Business Logic Services query and return the results to an SAP MII visual component.
For 3 Question: go through link
http://scn.sap.com/thread/1673540
Regards,
Praveen Reddy
