MELSEC OPC Server 3.1

MELSEC OPC Server is industrial communications middleware that exposes data from Mitsubishi Electric MELSEC PLCs to standard OPC clients, enabling seamless integration with SCADA, HMI, MES, historians, and analytics platforms. It connects to supported controllers—typically over Ethernet using Mitsubishi protocols such as MC Protocol/SLMP—and maps device memory (for example, X, Y, M, D registers) to browsable OPC tags for real-time read/write access. The server streamlines multi‑PLC connectivity, centralizes data access, and helps bridge OT devices with higher‑level applications.

Key capabilities

• OPC interoperability: OPC DA and/or OPC UA for standards‑based connectivity (feature set may vary by edition).
• Broad PLC coverage: commonly supports MELSEC families such as iQ‑R, iQ‑F/FX, Q, and L (model support depends on the specific build).
• Tag management: device browsing, address mapping, data type handling, scaling, and grouping for optimized polling.
• Security and reliability: user/authentication options and encrypted OPC UA endpoints where available; diagnostics and logging to aid troubleshooting.
• Integration aids: can import or align tag structures with Mitsubishi engineering tools (for example, GX Works) in certain implementations.
• Performance: configurable scan rates, multi‑client access, and support for large tag counts, subject to system resources.

Typical use cases

• SCADA/HMI visualization and control.
• Historian trending and analytics.
• Alarm dashboards and KPIs (when supported by the client and configuration).
• IT/OT data sharing and enterprise reporting.

Note: Exact features, licensing, and supported PLC models depend on the specific MELSEC OPC Server edition and vendor packaging. Always consult the product documentation for compatibility details before deployment.

MELSEC OPC Server is developed by Takebishi Electric Sales Corporation. The most popular versions of this product among our users are: 2.2, 2.4, 3.0 and 3.1. The name of the program executable file is MelsecExplorer.exe.