Rockwell Automation FactoryTalk View Site Edition Users Guide - Manual (Page 154)

F ACTORY T ALK V IEW S ITE E DITION U SER ’ S G UIDE
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Adding a Tag Alarm and Event Server
Optionally, you can add FactoryTalk Tag Alarm and Event Servers to an application.
Tag Alarm and Event Servers use FactoryTalk Alarms and Events services to monitor and
control alarms for tags in programmable controllers (PLC-5 or SLC 500) and other
devices, that do not have built-in alarm detection.
For more information about Tag Alarm and Event Servers, see Chapter 12, Setting up
FactoryTalk alarms.
Providing HMI server names
The FactoryTalk Directory stores HMI server names and does not delete them, even if you
remove an HMI server from all the applications in which it is used, and then delete the
HMI server’s project files.
This means that every HMI server must have a unique name:
 You cannot re-use an HMI server’s name, even after you delete the HMI server from
an application.
 If multiple users share the same FactoryTalk Directory, the names of all HMI servers
created by all users must be unique.
Similarly, if multiple applications share the same FactoryTalk Directory, the name of
each HMI server in each application must be unique.
Monitoring disk space on HMI servers
After deploying a FactoryTalk View SE network station application, monitor disk space
on computers running HMI servers, to make sure that it does not fall below 500 MB.
To monitor disk space
1. In the HMI server’s Events editor, create an event that uses the free_bytes function, to
return the number of free bytes available on the HMI server’s hard disk.
2. Create an HMI analog or digital alarm tag.
To indicate when disk space drops below preset levels above 500 MB, set up alarm
conditions for an HMI analog tag. To indicate only when disk space drops below 500
MB, set up alarm conditions for an HMI digital tag.
For information about setting up events, see Chapter 24, Adding logic and control.