Type plate · Modbus master / slave · Windows 10/11

Modbus polling
for modern
engineers

Test, debug and monitor Modbus slave devices with a fast native Windows application. Works on Windows 10/11. No subscriptions, no cloud, no nonsense. Need live visualization? ModbusManager Pro adds a drag-and-drop Dashboard HMI.

VersionPro v1.8.1
ProtocolRTU·TCP·ASCII
Slave mode● Included
HMIPRO edition
⬇ Download Pro — Free trial $119 one-time · HMI Dashboard included
⬇ Download Standard — Free trial $49 one-time · Windows 10/11
First run: what Windows will show you & SHA-256 checksums →
Windows 10/11 14-day free trial No credit card
🔍 Click to zoom
ModbusManager screenshot
// features

Everything you need

Built for industrial engineers who need reliability, not bloat.

Modbus RTU & TCP

Full support for RTU over serial RS-232/RS-485 and TCP/IP. Reads all four register types: coils, discrete inputs, holding and input registers.

📊

Real-time monitoring

Live register values with configurable poll rates from 100ms. Visual charts, data logging and export to CSV.

🖥️

Built-in Slave Mode

Run a full Modbus slave server (TCP or RTU) right inside the app — no second device or extra software needed. Supports up to 247 slave IDs, all register types, and typed simulation (counter, sine, ramp) for 16/32-bit and Float32 values. Modbus Poll charges separately for this — we include it at no extra cost. See the full comparison.

📋

Device templates

Start in seconds with ready-made templates for common devices — ebm-papst EC fans, Huawei SmartLogger, Siemens S7-1200, energy meters and VFDs. Load a template and the right poll windows are set up for you, then adjust to your device.

📟

Dashboard HMI PRO

Build live operator dashboards with drag-and-drop gauges, lamps, bars, trends, tanks and valves. Fullscreen runtime mode turns any PC into an HMI panel — no SCADA package needed.

🏷️

Tags & scripting PRO

Map registers to named tags with native 16/32-bit and Float32 decoding — read floating-point voltages, power and energy directly, no scripting needed. Drive logic with IEC-style Structured Text for alarms, calculations and conditional dashboard behavior.

📈

Data logging Historian PRO

Log register and tag values to a local database and review them over time with trend charts, selectable time ranges, per-series deadband and CSV export. Fully offline — no cloud, no separate historian server.

🔔

Alarm system PRO

Define alarms on registers or tags with warning and critical levels, hysteresis and activation delay. Acknowledge alarms, keep a full alarm history, and get audible alerts — shown in a dedicated tab or on the dashboard.

🔀

Modbus gateway PRO

Poll several RTU and TCP devices at once and republish the registers you choose as one common register map — with data type and scale conversion both ways. A PLC reads the whole installation over a single Modbus TCP connection. Modbus gateway software →

🎲

Register simulation

Simulate live device behavior with Counter, Sine wave, Random, and Ramp generators per register. Perfect for testing SCADA and HMI without real hardware.

🔎

Slave & Address Scan

Automatically scan for active slave IDs on a network or scan all register addresses in a device — essential when working with unknown hardware.

🔍

Serial Monitor

See every raw byte on the line in real time. Inspect TX/RX traffic, spot protocol errors and debug communication issues without extra tools.

🔄

Auto-reconnect

Automatically reconnects after a dropped connection — no manual intervention needed. Keeps long-running monitoring sessions alive without babysitting.

🌐

Multilingual UI

Full interface available in 11 languages including Chinese, Russian, Arabic and more. Switch without reinstalling.

🌓

Light & dark themes

Switch between a clean light workspace and a low-glare dark mode in one click — comfortable on a bright factory floor or in a dim control room. Your choice is remembered.

🧪

Test Center

Build and send custom Modbus requests by hand, inspect raw responses, and verify device behaviour quickly during commissioning and debugging.

🔒

100% offline

No cloud, no telemetry, no internet connection required. Your industrial data stays on your machine, always.

💾

Workspace files

Save a whole setup — poll windows, tags, dashboards, chart series, slave blocks and scripts — into one workspace file. Reopen it next week or hand it to a colleague and everything is exactly as you left it.

☀️
// solar / smartlogger

Monitoring a Huawei SmartLogger plant?

ModbusManager reads SUN2000 inverter data directly from the SmartLogger Modbus Remapped register scheme. Our step-by-step guide covers the address formula, register map, scaling and FC03 polling.

Read the guide →
// standard vs pro

Choose your edition

Both editions include the full Modbus master & slave toolset. Pro adds the Dashboard HMI — gauges, trends and a fullscreen runtime mode, and a Modbus gateway that merges several devices into one register map for a PLC.

Feature Standard Pro
Modbus RTU, TCP & ASCII master
Built-in Slave Mode & register simulation
Serial Monitor, Test Center, Slave & Address Scan
Charts, scaling, conditional colors, workspaces
Auto-reconnect & 11-language UI
Device templates (quick start for common devices)
Native 16/32-bit & Float32 tag decoding
Drag-and-drop Dashboard HMI canvas
Gauges, lamps, bars, trends, tanks, valves & more
Fullscreen runtime mode (operator view)
Snap-to-grid, undo/redo, z-order, PNG export
Price (one-time, perpetual)$49$119
// comparison

How we compare

A modern alternative to legacy Modbus tools.

Feature ModbusManager Modbus Poll QModMaster
Windows
Modbus RTU
Modbus TCP
TX/RX log
Saved profiles
Serial Monitor
Slave / Address Scan
Conditional colors
Value scaling & labels
32/64-bit float formats
Auto-reconnect
Register filter
Multilingual UI (11 lang)
Workspace save / load
Built-in Slave Mode✓ included⚠ separate app
Register simulation
Dashboard HMI (gauges, trends, runtime)✓ Pro
Actively maintained✓ 2026✓ 2026⚠ 2022
Pricefrom $49 one-time$129 one-timeFree
// pricing

Simple, honest pricing

One license per machine. No subscriptions, no hidden fees.

Trial
Free
Everything in the paid version, free for 14 days. No credit card required.
  • Modbus RTU, TCP & ASCII
  • Serial Monitor & TX/RX log
  • Slave & Address Scan
  • Built-in Slave Mode
  • Register simulation
  • Conditional colors & scaling
  • Auto-reconnect
  • Workspace save / load
  • Multilingual UI
  • 32 / 64-bit float formats
  • + Dashboard HMI, Historian & Alarms
⬇ Download trial — all features or Standard trial only ↓
Standard
$49 one-time
Perpetual license for 1 machine. Windows 10/11.
  • Everything in Trial
  • Full master & slave toolset
  • 12 months free updates
  • Email support
  • Instant delivery
Team / Site license
Volume pricing
Standard or Pro for teams of 5 or more. Invoice and PO supported.
  • Everything in Standard or Pro
  • Volume pricing from 5 seats
  • Invoice & purchase order
  • Priority support
Contact us
// first run

What Windows will show you

The installer is signed, but it is new. Here is what to expect and how to verify it.

On first run Windows may show a blue Defender SmartScreen panel saying it prevented an unrecognized app from starting. This is a reputation check, not a virus warning. SmartScreen counts how many people have downloaded and run a given build; a new release starts that count at zero regardless of who signed it.

Both installers are signed by E-Netter OU through Microsoft Azure Artifact Signing and carry a Microsoft timestamp. You can confirm this before running anything.

Check the publisher line
Publisher: EE, Harjumaa, Rae vald,
E-Netter OU
If it says anything else - or says unknown publisher - do not run the file, and email us.
  1. Click More info on the SmartScreen panel.
  2. Confirm the publisher line reads E-Netter OU.
  3. Click Run anyway.
SHA-256 checksums
Standard 1.4.1
ed5e9b9e2ac2b0f742c3b4f08f850c90e4236f3af92ac415b4c10ce20626c4ed
Pro 1.8.1
f4ca8358dcef2dbde7aad9d9b2c0c39d207f3da58599b55bf02a47c33266a3c7
Verify in PowerShell before installing:
Get-FileHash .\Modbus.Manager.Pro.Setup.1.8.1.exe -Algorithm SHA256
Hashes change with every release. If yours does not match the value above, you did not get the file from this site.

Activate Modbus Manager

Choose your edition, then enter your Machine ID and email.

📍 Where to find your Machine ID
1. Open Modbus Manager
2. Click the 🔑 License button in the toolbar
3. Copy the Machine ID shown in the window
License window → Machine ID: a1b2c3d4e5f6a1b2|

Secure checkout • Standard — $49 one-time payment • Instant delivery