opc da do not work Forum Home › Forums › Communicating with Devices › OPC › opc da do not work This topic has 2 replies, 2 voices, and was last updated 10 months, 4 weeks ago by Zeus. Viewing 3 posts - 1 through 3 (of 3 total) Author Posts August 5, 2021 at 7:23 am #9341 ZeusParticipant Hi, I got a problem to communicate with OPC DA Server. https://ibb.co/Z2jN5KG it stops communicating with the server after add tags. How can i debug it? August 5, 2021 at 2:19 pm #9352 MikhailModerator Hi, OPC DA is a black box. I strongly recommend to move to OPC UA because it is more reliable, and .NET5 and higher will not support classic OPC. I can provide the source code of the driver if needed. Also try this advice. August 6, 2021 at 3:05 am #9358 ZeusParticipant Hi, It works. Thanks! Author Posts Viewing 3 posts - 1 through 3 (of 3 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Math Captcha − 2 = 4 Log In