Benchtop Measurement and Test
Distributed Measurement and Control
High-Performance Test
Systems Engineering Software
Perspectives showcases how NI sees what’s next in the world of test and technology.
You can request repair, RMA, schedule calibration, or get technical support. A valid service agreement may be required.
Provides support for NI data acquisition and signal conditioning devices.
Provides support for Ethernet, GPIB, serial, USB, and other types of instruments.
Provides support for NI GPIB controllers and NI embedded controllers with GPIB ports.
From Friday, April 19th (11:00 PM CDT) through Saturday, April 20th (2:00 PM CDT), 2024, ni.com will undergo system upgrades that may result in temporary service interruption.
We appreciate your patience as we improve our online experience.
12-01-2021 08:15 AM
Hi,
OPC UA Historical Data Access works on top of queues of certain sizes (default is 1000 for each item).
https://zone.ni.com/reference/en-XX/help/376230B-01/opcuavis/opcua_add_item/
I have 2 questions:
- Where these queues are stored? memory? storage?
- Reading from queue means dequeuing? so History Read is clearing a place for new values to take in? Or should the queue be purged manually?
Thanks!
What do you need our team of experts to assist you with?
We'll be in touch soon!
