Overview

This plugin provides instructions to read and write from/to EPICS process variables and a single instruction to call functions that are hosted by an EPICS RPC server.

EPICS Instructions

Instruction	Description
ChannelAccessRead	Read a ChannelAccess process variable and store the result in a workspace variable
ChannelAccessWrite	Read a workspace variable and write its value to a ChannelAccess process variable
PvAccessRead	Read a PvAccess process variable and store the result in a workspace variable
PvAccessWrite	Read a workspace variable and write its value to a PvAccess process variable
RPCClient	Execute a Remote Procedure Call to an EPICS RPC server

All these instructions will establish a network connection each time they are called and will close that connection immediately afterwards. For process variables, whose value is continuously being monitored or just repeatedly used, this involves a considerable overhead. For that reason, the plugin offers specific types of workspace variables that will keep their connection alive and can be read or written like any other workspace variable:

EPICS variables

Variable	Description
ChannelAccessClient	This workspace variable connects to an EPICS ChannelAccess process variable as a client
PvAccessClient	This workspace variable connects to an EPICS PvAccess process variable as a client
PvAccessServer	This workspace variable publishes its value on the network as an EPICS PvAccess process variable