OPC DA null values because bad quality. Forum Home › Forums › Communicating with Devices › OPC › OPC DA null values because bad quality. This topic has 16 replies, 2 voices, and was last updated 1 year, 12 months ago by Mikhail. Viewing 2 posts - 16 through 17 (of 17 total) ← 1 2 Author Posts September 4, 2023 at 1:42 pm #13288 mrfyParticipant Mi Miklail! I have done exctly same steps as you and it works! Thank you. September 5, 2023 at 9:13 am #13297 MikhailModerator Hi, Note: The Automatically accept certificates checkbox should be unset in production environment. I’m not sure, may be the driver stores a certificate into the storage after it is accepted. Otherwise, it should be copied manually. Author Posts Viewing 2 posts - 16 through 17 (of 17 total) ← 1 2 You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In