About OPC communications

OPC is OLE for Process Control.
FactoryTalk View SE
 supports the OPC DA 2.05a, UA 1.02 and 1.03 specifications for exchanging data among automation or control applications, field systems or devices, and business or office applications.
OPC servers provide a way for
FactoryTalk View SE
 to retrieve tag values from:
  • All devices supported by RSLinx Classic.
  • All devices supported by
    FactoryTalk Linx
    .
    FactoryTalk Linx
     is optimized for use with all products in the
    Studio 5000
     controller family including ControlLogix, CompactLogix, FlexLogix, DriveLogix, SoftLogix, and GuardLogix controllers.
  • Third-party controller devices, such as Siemens or Modicon, using third-party OPC servers.
Using data server tags
  • Data server tags let you connect directly to controller tags through an OPC data server. For example, you can create an object on a graphic display and animate it using a direct reference to a data server tag in the OPC data server.
Using HMI tags
  • HMI tags can communicate with programmable logic controllers through OPC servers to non-Allen-Bradley and Allen-Bradley devices.
    TIP:
    Tip:
    • Use HMI tags when you need security, minimum and maximum values, units, or scale and offset.
    • When you use HMI or data server tags, you must add an OPC data server to the application.
    • RSLinx Classic is not installed automatically when you install
      FactoryTalk View
       Site Edition. For details about installing RSLinx, see the
      FactoryTalk View
       Site Edition Installation Guide
      .
    • To use
      FactoryTalk Linx
       after you install it, you must set it up and add a
      FactoryTalk Linx
       data server to the application. For details about setting up
      FactoryTalk Linx
      , see
      FactoryTalk Linx
       Help.
    • For information about setting up an OPC server, see FactoryTalk Help.
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