Rockwell Automation FactoryTalk Alarms and Events Quick Start - Manual (Page 184)

FactoryTalk Alarms and Events System Configuration Guide
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Tested system limits
For historical alarm logging, you must be able to log on to a Microsoft SQL Server
2005 Express (SP2), SQL Server 2000 (SP4), or SQL Server 2005 database.
When a controller becomes disconnected from alarm servers on the network, it might
take several minutes to reconnect, depending on the number of controllers and alarms
in the system.
Tested limit Value
Number of alarms per FactoryTalk
application 20,000
Number of Rockwell Automation Device
Servers per application 2
Number of alarms per Rockwell
Automation Device Server (RSLinx
Enterprise) 10,000
Number of Tag Alarm and Event Servers
per application 2
Number of alarms per Tag Alarm and
Event Server 10,000
Alarm burst (number of alarms occurring
at once) 2000
Simultaneous alarm operations (for
example, enabling, disabling,
acknowledging, or suppressing alarms) 2000
Number of alarms the alarm summary
can display at once 2000
Number of clients simultaneously
connected to the application 20