Multiple Devices Using a Single Serial or Modem Channel:

OPC Server Manager No Manager Time-outs are Managed Impact on other Devices Reduced Changes are Logged for Documentation No Operator Action Required Configuration Changes Automatically Comm. Errors or Configuration Changes can be Sent through E-mail to Pagers and Cell Phones Re-enable Off-line Devices at Timed Intervals Single Edition Does All This Network Edition Only Needed with Multiple OPC Servers or Remote Management One Device Times-out All Devices Updates Slower       No Documentation If Manual Changes Made Operator Must Make Changes to Configuration to Maintain Quality Communications Any Notification Requires Custom Client Scripting Not all clients have this ability.