OPC for PM800 load
we plan to install new controllers and I would like to know how much loaded my OPC servers for PM800 controllers and what is maximum limit.
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The recommended maximum total number of OPC DA item (DA Subscriptions) is 20000 per connectivity server. In PG2, the display call-up time is 1 second per 800 OPC items (i.e., 800 items = 1 second, 1600 items = 2 seconds, 2400 items = 3 seconds, etc.)To reduce the subscription load, change attributes for some parameters from Retain to Retain Nosort Hidden. Also, close the unused overlap graphic displays, unused faceplates, etc.
You can check the Data Access OPC Statistics. Open OPC Server for AC800M -> select the controller -> Tools -> Display OPC Statistics -> Data Access. (From a connectivity server).