Rockwell Automation 1757-SWKIT5000 ProcessLogix R500.1 Installation and Upgrade Guide - Manual (Page 249)

Publication 1757-IN500A-EN-P - September 2002
Performance and Capacity Specifications 11-9
Client/Server Communication Capacity
Server Notifications
Table 11.G Server communication NetBIOS session capacity
Session type or activity Comment/example
Time Sync Active once every configured Time Sync period.
Shared Drives/ Displays Active continuously, if Station Client get displays from
central Server.
Shared printer Active continuously if linked to a network printer for
Reports, etc.
Server Redundancy Uses from 1-3 Server Sessions based upon User/Login
Configuration settings. (Also requires Time-Sync)
ER Server Active during replication on Redundant Servers.
Multi-User CB Active during Point Build (uses shared drive)
Snap-Shot Save & Restore Active during this operation (uses shared drive)
Server Type Simultaneous NetBIOS sessions available
ProcessLogix Server on Windows
2000 Server Unlimited (See Microsoft license restrictions)
Table 11.H
Server Notifications Value
Maximum number of events (burst condition)
(1)
(1) Event Burst Handling
The ProcessLogix Server Alarm System will handle an event burst of up to 1000 events, with a
minimum time between consecutive bursts. An “event burst” will be defined as a group of
events greater than 40/sec, received from all connected Event Servers in a period of less than 3
seconds. The time period required between consecutive bursts, to allow for event processing,
can be calculated using the following formula:
T = BS/(40-ER)
Where:
T = # of seconds required between bursts
BS = Burst Size (number of events in the burst)
ER = Event Rate between bursts
Examples:
1) 1000 Event burst and no events between bursts: T = 1000/40 = 25 seconds
2) 500 Event burst with 30 events/sec between: T = 500/10 = 50 seconds
1000 events
Maximum number of events/second (sustained) 40/sec
Maximum number of alarms/second (sustained) (2)
(2) Up to two events are also generated for every alarm, including one event for entering the alarm
condition and one for return to normal.
20/sec
Maximum number of remote OPC A&E Servers
subscribed to by the ProcessLogix Server
(3)
Maximum number of remote OPC A&E Clients supported
by the ProcessLogix OPC A&E Server 5