OPC UA client

TagSource example

json

{
  "protocol": "opcUa",
  "host": "192.0.2.20",
  "port": 4840,
  "nodeId": "ns=2;s=Temperature",
  "subscribe": false,
  "securityPolicy": "none"
}

Field	Note
`host`, `nodeId`	required
`port`	default 4840
`subscribe`	DataChange
`publishingIntervalMs`	1–60000; otherwise ~200 ms
`deadband`	absolute
`securityPolicy`	`none` \| `sign` \| `signAndEncrypt` \| `Basic256Sha256`
`username` / `password`	optional

Connection: host/port/security/username/password.
Point: nodeId, subscribe, publishingIntervalMs, deadband.

Write: Write + read-back. VION_OPCUA_SUBSCRIBE runtime env (unregistered).