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Subscription Limitation #777

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VitorCaldana opened this issue Feb 6, 2025 · 0 comments
Open

Subscription Limitation #777

VitorCaldana opened this issue Feb 6, 2025 · 0 comments

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@VitorCaldana
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Dear Developer.

I´m a PhD student and am using Node-RED and your library to connect to a Flexible Manufacturing System (FMS) with 300+ variables. Each working station of said FMS has between 40 and 60 variables that need to be monitred via subscription (since I´m using Asset Adminsatration Shell) and I found a limitation to the Server Block on the library.

The server won´t allow me to get more than 100 variables subscriped, and 10 per session or OPC UA Client.

Looking at the coding files, I found the following at server_capabilities.js

maxSubscriptions: 100,
maxMonitoredItems: 1000000, // 1 million
maxSubscriptionsPerSession: 10,
maxMonitoredItemsPerSubscription: 100000, // one hundred thousand
maxSelectClauseParameters: 100,
maxWhereClauseParameters: 100,
maxMonitoredItemsQueueSize: 60000,

I tried changing those numbers to values that would make my application run, however even after editing anf saving the file, restarting Node-RED, restarting the computer and removing and reinserting the Server node I get all the confirmation message from subscription from the client butthe number o SubscriptionsPerSession is still 10. I tried to find the variable at other files, but VSCode can´t find them anywhere else.

I noticed that these settings are not visible at the UI, is this why it is not working??

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