iNut OPC — Industrial OPC Server Software: Bringing Every Protocol Together

A typical factory is packed with all kinds of devices: PLCs speaking Modbus RTU/TCP, sensors pushing MQTT, digital meters that differ from brand to brand. Meanwhile SCADA, MES or the production operating system want to read data through one common standard — usually OPC. Without a "translation station" in the middle, integration turns into a tangle of wires and patchwork code.

iNut OPC sits exactly at that junction: a gateway software running on a PC, collecting from every protocol below and emitting the OPC standard above — so the rest of the system only has to "speak one language".

A familiar tree-style interface: each channel is a data source (Modbus TCP, MQTT bridge, simulator…), with devices and tags underneath. Add/edit quickly, filter by name/address, and import – export Excel/JSON to duplicate configurations across machines in just seconds.

Declare each tag once — Modbus address, data type, scan cycle — and iNut OPC automatically exposes it as a standard OPC node. For example, the Temperature tag (Modbus 40001, INT16, 1000ms scan) instantly appears at MODBUS TCP.PLC 1.Temperature with its value and "Good" quality.

From the same data set, iNut OPC simultaneously serves three interfaces: OPC UA (port 4840), Modbus TCP Server (port 5020) and OPC XML-DA (port 8895). Whatever SCADA a customer uses, it can connect — no lock-in to a single standard. The Diagnostics screen shows the status of each server, client count and live tag values.

No external tools needed: enter the endpoint opc.tcp://…:4840 and click Connect to browse the server's entire address space, inspecting nodes and values. Very handy for on-site acceptance testing before handing off to SCADA.

iNut OPC ships with a two-way FTP/FTPS file transfer mechanism to automatically back up and synchronize projects/data between the machine at the factory and the central server. The core is designed "safety first": Ed25519-signed manifests against tampering, atomic file writes with SHA-256 checks, hot SQLite backups that don't disrupt the running database, bandwidth limiting and an audit security-check engine.

iNut OPC isn't a paper demo: the software is already running 24/7 at multiple factories, including the Pá Chiến and Mường Hung hydropower plants — where stability and fault recovery are mission-critical requirements.

// Quick specs