RSView Supervisory Edition Installation Guide

Setting up data server tags
To use data server tags:
1. Create the tag in the OPC server, or processor, or use an existing
tag in the processor.
For information about creating tags in OPC-DA servers that have
their own tag database, see the documentation provided with the
OPC-DA server.
For information about creating tags in a ControlLogix processor,
see the programming software documentation for ControlLogix.
2. Create a data server in RSView, if the application doesn’t already
have one.
3. Anywhere you need to access a tag’s value, map an application
component to the tag. For example, map a tag to a graphic object,
or add the tag to a data log model. At run time, the tag’s value is
passed to the component it is mapped to.
Using HMI tags
Use HMI tags for triggering alarms and where you need to manipulate
data or secure the values in a device.
Triggering alarms
In RSView, HMI tags provide the only method for triggering an alarm
when a tag has a certain value.
An alarm occurs when something goes wrong. It can signal that a
device or process has ceased operating within acceptable, predefined
limits or it can indicate breakdown, wear, or a process malfunction.
For more information about alarms, see Chapter 11, Creating alarms.
Working with tags 8–5