ModbusCloud Diagnostics is the diagnostic tool every Modbus installer needs. Scan, read, log and analyze. All on your own laptop, no cloud, no account. Completely free.
Every device is different. Documentation isn't always right. And the client is waiting.
You're at an installation, the datasheet is vague or missing, and you're trying to find registers manually. Guessing which address, which data type, which byte order. That costs you hours.
Modbus Poll is fine for a single register. But scanning an entire device? Network scanning? Logging data over time? Then you're stuck with three separate tools and an Excel sheet.
Every minute you spend at a client's site costs money. Quickly setting up a connection, finding registers, and diagnosing the problem. That's what you need. Not reconfiguring five times.
ModbusCloud Diagnostics is your complete Modbus workshop in one application. Connect, scan, read, log and analyze.
Built for installers who want to work fast. Not for engineers looking for a protocol analyzer.
Save and load connection profiles with one click. Device templates with pre-filled registers. No more manual configuration at every client.
The register scanner automatically searches all addresses and detects data types. The byte order visualizer instantly shows which combination yields correct values.
Log register values over time. Export as CSV. Show your client or manufacturer what's actually happening. With timestamps, statistics, and charts.
Connect, scan, read, write, log, analyze. TCP and RTU. Dashboard for multiple devices simultaneously. No more separate programs.
The features that make the difference when you're at an installation.
Holding, Input, Coils and Discrete Inputs. Choose your function code, set the address range, and read live. Value interpretation shows UInt16, Int16, Float32, UInt32, and Int32 directly. The byte order visualizer lets you see at a glance which combination is correct.
Set the address range, select function codes, and let the scanner do the work. Results as sortable table or as heatmap. Type hint detection recognizes Float32 high and low words, ASCII, and zero values. Filters by function code, type, or non-zero only.
Real-time TX/RX frames with color-coded hex bytes. Each frame is automatically described: "Read 2 registers from address 0". Filter on errors, search by hex, pause the log for analysis. The protocol analyzer is your proof when something doesn't work as expected.
Select registers, set the interval (100ms to 10s), and let the logger run. Live charts during logging. Statistics per register: min, max, average, standard deviation. Export as CSV or JSON for your report or for the manufacturer.
From setting up a connection to exporting data. Everything is included.
| Protocollen | Modbus TCP, Modbus RTU, Modbus ASCII |
| Function Codes | FC01, FC02, FC03, FC04, FC05, FC06, FC16 |
| Datatypes | UInt16, Int16, Float32, UInt32, Int32 |
| Byte Orders | ABCD, CDAB, BADC, DCBA |
| Adresbereik | 0 - 65,535 |
| Slave ID bereik | 1 - 247 |
| Baudrates | 2400, 4800, 9600, 19200, 38400, 57600, 115200 |
| Parity | None, Even, Odd |
| Poll interval | 500ms - 10s |
| Log interval | 100ms - 10s |
| Max verbindingen | Multiple (TCP + RTU) |
| Templates | 5+ (Eastron SDM72D-M, SDM630, SDM120, SDM230, ABB B23/B24) |
| Data opslag | Local SQLite database |
| Export formaten | CSV, JSON |
| Profiel formaat | JSON (import/export) |
| Prijs | Free |
| Windows | .exe and .msi installer |
| macOS | .dmg - Apple Silicon + Intel universal |
| Internet vereist | No - fully offline |
| Interface taal | Dutch |
Install and get started. No account, no registration, no cost.
Download Diagnostics for free and experience the difference at your next installation.
ModbusCloud Diagnostics - part of ModbusCloud