Difference between revisions of "Server Discovery3"

From UaCapabilities
Jump to: navigation, search
(Created page with "==Introduction== An OPC UA Client wishing to connect to an OPC UA Server needs the address of the Server. UA Discovery defines the means to find OPC UA Servers, their supporte...")
 
 
Line 16: Line 16:
  
 
== Required Discovery Capabilities ==
 
== Required Discovery Capabilities ==
* [[uacap:Discovery Core|Local Discovery}}
+
* [[uacap:Discovery Core|Local Discovery]]
 
== Advanced Discovery Capabilities ==
 
== Advanced Discovery Capabilities ==
 
* [[uacap:Discovery Subnet|Subnet Discovery]]
 
* [[uacap:Discovery Subnet|Subnet Discovery]]
 
* [[uacap:Discovery Global|Global Discovery]]
 
* [[uacap:Discovery Global|Global Discovery]]

Latest revision as of 16:20, 24 February 2015

Introduction

An OPC UA Client wishing to connect to an OPC UA Server needs the address of the Server. UA Discovery defines the means to find OPC UA Servers, their supported protocols, security policies and other capabilities.

UA fw Discovery.JPG

Discovery has to consider different configurations

  • Client and Server on the same host
  • on the same network or
  • on completely different locations in a system (a plant, an enterprise).

Furthermore, Servers may be installed on different types of host devices like a sensor, a control device, or a workstation. A single device may host more than one Server.


Servers may have multiple endpoints if they support multiple addresses, protocols, or multiple levels of security. Clients can discover these endpoints and choose the proper one based on a system-wide policy or based on manual selection.
Note - Discovery is specified in OPC UA Part 12, the Discovery Services are specified in OPC UA Part 4

Required Discovery Capabilities

Advanced Discovery Capabilities