Bandwidth and Latency Issues with Network Applications

Network applications must always be concerned with bandwidth and latency:

• The bandwidth available to the RTU will determine how fast the scan loop can be completed.
• The scan time will be effected by baud rate, protocol overhead, network loading, can contention for specific nodes.
• The number of Catalyst channels that are scanned also contributes significantly.
• The latency for a channel is a measure of how long it has been since the value for that data point has been updated.
• This latency is a function of the channel scan time, the response time of the remote node, and any occurrence of a communication glitch.
• You can use Alarmware to determine scan time.
• • Just connect with Alarmware and select "Net Diagnostics -- Summary Reports" from the Diagnostics menu.
  • The value will be shown in the report, located in the "Messages for RTU" window.