# OPC DA client - Asynchronous Advise

**URL:** <https://discourse.nodered.org/t/opc-da-client-asynchronous-advise/54694>\
**Category:** Industrial\
**Created:** [3 December 2021 22:58 UTC](https://discourse.nodered.org/t/opc-da-client-asynchronous-advise/54694 "2021-12-03T22:58:57Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![saalty](https://avatars.discourse-cdn.com/v4/letter/s/8c91f0/32.png) [@saalty](https://discourse.nodered.org/u/saalty)\
**Post date:** [3 December 2021 22:58 UTC](https://discourse.nodered.org/t/opc-da-client-asynchronous-advise/54694/1 "2021-12-03T22:58:57Z")

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Dear all!

I need to read large amount of data from an older OPC DA server and it would be nice to instead of reading data synchonously get only changes from server in asynchronous advise mode. Is this mode supported in Node-Red with **opcda-read** node in **node-red-contrib-opcda-client** or in any other method?

greetz

saalty

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [1 February 2022 22:59 UTC](https://discourse.nodered.org/t/opc-da-client-asynchronous-advise/54694/2 "2022-02-01T22:59:50Z")

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