Add an I/O Server Process

An I/O Server process is a dedicated communications server that exchanges data between I/O devices and control clients. No data processing is performed by the I/O server (except for its local display) process. Data is collected and passed to the control clients for display, or to another server for further processing. Data sent to an I/O device from any computer is also channelled through the I/O server. If data traffic is heavy, you can use several I/O servers to balance the load. The default server port numbers are listed in the topic Configure Servers.

To add an I/O Server process:

1. In the Topology activity, select Edit.
2. On the menu below the Command Bar, select I/O Server.
3. Add a new row to the grid.
4. Type the required information in each column, or in the Property Grid (see below for a description of the properties).
5. Click Save.

I/O Server Properties

General Properties

Property	Description
Server Name	The name of the server. The name needs to be unique to the project and any included projects, and not contain spaces.
Cluster Name	The name of the cluster to which this I/O Server will belong. If there is only one cluster defined in the project, you can leave this field blank. The I/O Server will default to the defined cluster.
Comment	Any useful comment. This property is optional and is not used at runtime.

Communication Properties

Property	Description
Network Addresses	The network address(es) of the server being configured. To specify dual network connections to the server, use a comma delimited list. See Network Redundancy.
Port	The port this server will listen on. You may leave this blank in which case the default port number will be used.
Legacy Port	Allows legacy connections to the server.

Note: Servers listen on legacy ports only if the INI parameter [LAN]EarliestLegacyVersion has been enabled.

Project Properties

Property	Description
Project	The project in which the I/O server is configured.

Published June 2018