Specifications

15 – Configuring Distributed Server Architecture
348 R400
Working with a Distributed Server Architecture
For normal operation, a distributed server system works the same as a single
server system. From an operator’s perspective, the only difference between a
local and a remote point is that a remote point is assigned to an area configured
with the alias of a remote server (see “Defining and Enabling Areas” on page 92).
This section discusses the characteristics of a distributed server system for
engineering tasks.
Working with Algorithms
Point Algorithm displays use internal database references. This means that you
need to log on to the remote server, using standard Operator Station networking
facilities, to view point algorithm configuration from Station.
Configuring Hardware Items
The configuration summaries for hardware items only show items configured on
the local server. You need to log on to the remote server to view or work with the
configuration of the following items:
• Connections
• Channels
• Controllers
• Printers
• Redundant Servers
• Stations
• System Status displays
Performance Considerations
The accuracy of information and timeliness of control for remote servers depends
on the capacity and reliability of the networks and data links.
A local server issues an alarm if the response from a remote server takes longer
than the time specified in its configuration (see “Configuring the Remote Servers”
on page 353). Operators can also monitor the status of links and remote servers
from the System Configuration - Distributed Servers summary. Clicking a server in
the summary list displays more detailed status information.
plscpcg.book Page 348 Monday, May 28, 2001 10:11 AM