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.

Versionv1.4.0
ProtocolRTU·TCP·ASCII
Slave mode● Included
HMIPRO edition
⬇ Download Standard — Free trial $49 one-time · Windows 10/11
⬇ Download Pro — Free trial $119 one-time · HMI Dashboard included
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 and all register types. Modbus Poll charges separately for this — we include it at no extra cost.

📟

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 and drive logic with IEC-style Structured Text — alarms, calculations and conditional dashboard behavior, all inside the app.

📈

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.

🎲

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.

☀️
// 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.

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
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
Download trial
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

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