The APIPool maximum limit should be set so that there are always API-connections available, if needed. The APIPools limit depend on the number of concurrent API-connections used in IEC which in turn, depend on the number of processing threads and the depth of API-loop levels inside the maps.

The maximum value can be calculated by multiplying the number of process threads by 3.

Note: The maximum value limit is 1000.

APIPool settings:

MvxAPI.Pool.Connection.Max=3 * Runtime.ProcessWorker.MaxWorkers