SCADAScop is a free multiprotocol SCADA testing tool with a modern, dockable Dear ImGui interface. It brings the whole Scop family into one application: Modbus, DNP3 (IEEE 1815), IEC 60870-5-104, and IEC 60870-5-101 — each as Master and Slave — all running at the same time on one grouped channel tree. Poll real PLCs over Modbus while simulating a DNP3 outstation and an IEC 104 station for the SCADA under test, in a single window, with one workspace file.
Every protocol stack is hand-rolled over Asio, with no third-party protocol library, and shared with the standalone ModbusScop, DNPScop, IEC104Scop, and IEC101Scop tools.
Free to use and redistribute under the permissive BSD 2-Clause License.
Developed by Carlos Nardi.
SCADAScop is organized as a tree: Groups → Channels → (protocol-native subtree).
- A Group is a user-named container — a substation, a bay, a test rig. Use one or many; the tree stays flat while there is only one.
- A Channel declares a Role (Master or Slave) and a Protocol (Modbus, DNP3, IEC 60870-5-104, IEC 60870-5-101), then the matching Scop tool's own New Channel dialog asks for the endpoint: TCP, UDP, or serial, as each protocol allows. Each channel runs on its own I/O thread and keeps running regardless of what is on screen; start and stop them independently. Every channel has an accent color (a per-protocol default, or your own) that also tints that channel's windows.
- Under each channel the tree shows the protocol-native structure you know from the standalone tools — RTUs and maps for Modbus, outstations and points for DNP3, stations and information objects for IEC — with the same context menus (Add RTU, Points, Events, Messages, Tools…) and the same working windows.
| Protocol | Master | Slave |
|---|---|---|
| Modbus TCP / UDP / RTU (serial, and RTU over the network) | ModbusScop Master | ModbusScop Slave |
| DNP3 (IEEE 1815) over TCP / UDP / serial | DNPScop Master | DNPScop Slave |
| IEC 60870-5-104 over TCP | IEC104Scop Master | IEC104Scop Slave |
| IEC 60870-5-101 over serial / TCP tunnel | IEC101Scop Master | IEC101Scop Slave |
Each tool is the same code as its standalone release — poll windows, point databases, message schedules, simulation, glue logic, fault injection, CSV import/export, and the per-protocol Communication Monitor with layered frame decode are all there. See the individual tool READMEs for the full protocol feature lists.
- All eight tools at once — any mix of protocols and roles, hosted in one docking space, one menu bar, one status bar. Tools are instantiated on demand the first time a channel of that kind is created.
- Grouped channel tree — organize channels into named groups, reorder them, move channels between groups, and color-code each channel. The tree blinks on traffic per channel.
- One Status Messages window — the merged, timestamped stream of every tool's events, colored by protocol, with a Source column.
- One Dashboard — a collapsible section per protocol tool with its live traffic counters and connection state.
- Per-protocol windows on demand — each tool's own windows (Live Data Map, Communication Monitor, Events, Points, Messages, poll windows…) are one click away under View → tool name.
- One workspace — File → Save Workspace writes a single
.sswfile that records groups, channel bindings, and accent colors, alongside one native workspace side file per protocol tool, so every channel, point, schedule, and simulation is restored together. SCADAScop reopens the last workspace on launch and keeps a recent-files list. - One look — dark / light / classic themes with a customizable accent color, DPI scaling, always-on-top, GPU or CPU rendering; the shell owns the theme so every tool matches.
- Animated splash and About — the family's animated splash rotates its style on each launch.
- Go to the Releases page and download the latest
SCADAScoparchive for Windows. - Unzip it anywhere and run
SCADAScop.exe— no installation required.
Requirements: Windows 10/11 (64-bit).
Rendering: SCADAScop uses the GPU by default; you can switch to CPU (software) rendering under View → Rendering (handy over Remote Desktop or in VMs).
- Channel → New Channel... (Ctrl+N) or + Channel — pick the Role (Master / Slave) and the Protocol, press Continue, and fill in that tool's endpoint dialog (host and port, bind address, COM port, link addresses, framing…).
- Repeat for every device you want to poll or simulate — a Modbus master channel to a PLC, a DNP3 slave channel for the SCADA, an IEC 104 station… Optionally + Group to organize them and pick an Accent color per channel.
- Expand a channel to work with its RTUs, points, maps, and schedules exactly as in the standalone tool; right-click for the tool's own actions.
- Press Start on each channel. Follow everything in the shared Status Messages and Dashboard, and open a protocol's Communication Monitor from the View menu to see its frames decoded.
Use File → Save Workspace (Ctrl+S) to keep the whole multiprotocol setup and reload it later with Open Workspace (Ctrl+O) — or just start SCADAScop again; it reopens the last workspace.
SCADAScop is built with these open-source components, each under its own license:
| Library | Used for | License |
|---|---|---|
| Dear ImGui (docking) | user interface | MIT |
| GLFW 3 | window / OpenGL context | Zlib/libpng |
| OpenGL 3 | rendering | — |
| Asio (standalone) | TCP / UDP / serial transport for every protocol | Boost Software License 1.0 |
| stb_image | logo / splash decoding | MIT / public domain |
The Modbus, DNP3, IEC 60870-5-104, and IEC 60870-5-101 protocol stacks are original code, not third-party libraries.
SCADAScop is released under the BSD 2-Clause License. It is provided "as is", without warranty of any kind; the author is not responsible for any damage or loss caused by its use.
BSD 2-Clause License
Copyright (c) 2026, Carlos Nardi
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