SKEPS-OPC
Server
OPC is a published industrial standard for system interconnectivity. The OPC Foundation maintains all the OPC specifications. OPC stands for OLE for Process Control. It uses Microsoft's COM and DCOM technology to enable applications to exchange data on one or more computers using client/server architecture. OPC defines a common set of interfaces. So applications retrieve data in exactly the same format regardless of whether the data source is a PLC, DCS, gauge, analyzer, software application or anything else. As a result, OPC is as an out-of-the-box, plug and play communication solution.
Smartkey, member of OPC Foundation, USA
Smartkey becomes a member of OPC Foundation, USA on January, 2007. Only a member is eligible to advertised using the OPC logo.
Advantages of OPC
OPC allow client to receive underlying data. It provides benefits as stated...
1. Minimizes devices drivers. Hardware manufacturer need to developed only one software package.
2. Software developers need not to rewrite driver to facilitate hardware parameters changes and firmware updates.
3. Customer has a wider choice to decide which hardware to use, thus can develop world-class integrated system.
OPC has eased the integration of different
type of system as shown on diagram…
Expression
Expression：Device Name + Delimiter （“.”）+ Item Name
E.g.：
a) Door Name: MainDoor，Access doors status
Item Name：MainDoor.Close_Open
Legend
0: Not in use
1: Door Close
2: Door Open
b) Controller Name: SK800-1, Controller status
Item Name: SK800-1.N_CommFail
Legend:
0: Not Used
1: Normal
2: Communication error
SKEPS-OPC Interface
