Remote Procedure Call (rpc)

A remote procedure call is a special logic table with the special rpc bit set.

The call will be triggered from a remote communication partner.

Rpc can contain many parameters. They always hace a trigger condition which becomes true if the partner calls it.

A rpc has a result.The result can offer one or multiple parameters. The trigger always exists.

A rpc call should not run for a long time. If the result will need time a second rpc for polling the result is needed. Often this call is the result of an event which triggers this.

In OPC UA the rpc declarations are coming from XML files. This files mostly come from companion specifications as Euromap, TMC and others.