We have a new device that uses TCP to send messages (commands) / receive messages (output). The sent message requires a checksum. Can I set this up as an OPC-UA Server TCP device and use it that way or is this a pure scripting requirement. If it’s scripting, can you provide some sample code?
You could use an expression tag to run an expression (most likely, you’ll need to run a script) that writes back to the Writeable tag created by the TCP driver.
The exact way that checksum is calculated is up to your device; you’ll need to dive into the documentation to find out what it expects.