Opc server for ac 800M, Installation and Configuration

Section 2 Start-up and Configuration
Alarm and Event Settings
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Client Queue Size
Every OPC Alarm and Event client has a queue in the OPC Server to buffer event 
notifications. This number specifies the maximum number of items in every queue. 
Each queue has the same limitations. The default value is 2000, the minimum value 
is 1500 and maximum value is 5000.
Maximum Number of Alarms
The OPC Server contains a list of all alarms that are not idle (all condition states 
except the idle state 2) in the connected controllers. This means that you should use 
the Max number of Alarm variable to setup 'The number of alarms that can possible 
be active at the same time'. 
Do not confuse this with your total amount of alarms in the system!
The maximum number of alarms defines the maximum number of alarms in the list, 
the default value is 5000. 
On list overflow, the latest alarm is deleted and a system simple event is generated to 
announce the overflow. 
In some cases, in conjunction with large projects, the default value has proven to be 
too low. It is then recommended to increase the setting from 5000 to, for example, 
7500.
Other system variables part from those presented here in the AE Settings dialog 
box, can be configured in the System Variables dialog box (Settings > System 
Variables). See 
Setting System Variables
 on page 61.

Setting Cache Update Rate
Section 2 Start-up and Configuration
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