Performance limits when reading extended properties

FactoryTalk Linx

requests extended properties from a Logix controller when these properties are initially requested by FactoryTalk View. This initial read can take a substantially longer time than normal tags values. This time grows as the number of extended properties on a screen increases. The read time of the initial extended parameter slows down the initial screen launch for FactoryTalk View. Once the extended properties are read, they are retained in

FactoryTalk Linx

memory so that subsequent requests are significantly faster. It is important to test your design thoroughly to ensure that your application can tolerant this speed difference both initially and after the extended properties are collected.

Starting from

FactoryTalk Linx

version 6.10.00, it takes less time to execute the initial read action requested by FactoryTalk View SE and a shorter initial screen launch time for FactoryTalk View SE. This improvement is accomplished by

FactoryTalk Linx

uploading all of the Logix controller's extended tag properties when it first establishes its connection. This cached information is then used to fulfill requests locally rather than reading them from the controller.

FactoryTalk Linx

will also monitor the controller to detect changes in order to maintain its local cache.