Device Recovery - Startup Considerations

In a site with many RTUs, it may be useful to consider port startup staggering to spread the load out. This is configured using the Citect.ini parameter [DNPR]StartupStaggerDelay.

It may also be a good idea to use the Citect.ini parameter [<unit>]PollPeriodOffset to stagger when polls are issued, especially where many units are coming through one port.

For example, unit 1 – 5, unit 2 – 10, unit 3 – 15, would send polls 5 seconds after the default time for unit 1, 10 seconds after unit 2, and 15 seconds after unit 3.

Note: The static polls, which are used to recover a device (after interrupted communications or system startup), will NOT be staggered. This is because the driver will try to bring the devices online as soon as possible and static (class 0) polls will not load the system too much. Subsequent periodic polls will be staggered using the parameter [<unit>] PollPeriodOffset.

See Also

Device Recovery