// ModbusManager Pro — Data Logger

Modbus Data Logger
Software for Windows

Record Modbus register and tag values to a local database and review them over time — trend charts, selectable time ranges, deadband and one-click CSV export. A built-in historian with no cloud and no separate server. Works with RTU and TCP devices on Windows 10/11.

Download Pro trial — free 14 days Buy Pro — $119

No credit card for trial · Windows 10/11 · One-time license

// what is modbus data logging

Turn live registers into history

A Modbus poll shows you the value now. A data logger answers the questions that come later: what happened overnight, when did the value spike, is the trend drifting?

ModbusManager Pro records the values you choose to a local database, so you can scroll back through hours, days or weeks of real device data without standing up a full SCADA or historian system. Logging starts with a single click from any poll window or tag, and the data is stored on your own PC in a compact SQLite database — no cloud account, no subscription, no separate server to maintain.

// what the historian does

Everything you need to log and review

Capture the signals that matter, keep the database lean, and get the data back out whenever you need it.

📈
Trend charts
Plot any logged series over time with selectable ranges — last hour, 24 hours, 7 days, everything, or a custom window.
🏷
Registers & tags
Log raw registers or named tags. Combine signals from multiple slaves and both RTU and TCP devices in one history.
🎚
Deadband
Store a value only when it changes by more than a set amount — keeps slow signals compact and the database lean.
📊
Live statistics
See min, max, average and sample count for each series at a glance, recalculated as new data arrives.
📤
CSV export
Export any series to CSV and open it in Excel, Google Sheets or your analysis tool of choice.
💾
Local & offline
Data lives in a local SQLite database on your machine. No cloud, no account, no internet dependency.
// how to log modbus data

Three steps from device to history

If you can poll a device, you can log it. No scripting required.

Step 1
Poll your device
Connect over Modbus RTU or TCP and set up the registers you want to read, exactly as you would for normal polling in ModbusManager.
Step 2
Start logging
Click the Log button on a poll window or tag. Optionally set a deadband to control how much data is stored for that series.
Step 3
Review & export
Open the History tab to see trend charts and statistics, pick a time range, and export to CSV when you need to share or analyse the data.
// where it helps

Typical uses

Commissioning and fault-finding — capture a device’s behaviour over a shift and review exactly what happened. Long-term monitoring — track temperatures, pressures, energy or flow and spot slow drift. Acceptance testing — record values during a test run and export the evidence. Energy and process studies — log consumption or production figures and analyse them in a spreadsheet. Anywhere you would otherwise reach for a separate data-logging tool, the built-in Historian keeps it in one application.

// standard vs pro

Which edition do you need?

Both editions include the full Modbus master and slave toolset. Pro adds the Historian, Dashboard HMI and alarms on top.

FeatureStandard — $49Pro — $119
Modbus RTU, TCP & ASCII master✓✓
Built-in Slave Mode & register simulation✓✓
Charts, scaling, workspaces, 11-language UI✓✓
Data logging Historian✗✓
Trend charts with selectable time ranges✗✓
Per-series deadband✗✓
CSV export✗✓
Dashboard HMI & alarm system✗✓
Price (one-time, perpetual)$49$119
Need just the polling tool? ModbusManager Standard → $49
// frequently asked questions

Modbus data logging — FAQ

Can ModbusManager log Modbus data to a file?+
Yes. ModbusManager Pro includes a built-in Historian that logs register and tag values to a local SQLite database. You can review the data as trend charts and export any series to CSV for use in Excel or other tools.
Does the Modbus data logger work offline?+
Yes. The Historian stores data in a local database on your PC. No cloud account, internet connection or separate historian server is required — everything runs inside the application.
How do I reduce the amount of logged data?+
Each logged series supports a deadband: a value is only stored when it changes by more than the deadband amount. This keeps slow-moving signals compact while still capturing meaningful changes.
Can I export logged Modbus values to Excel?+
Yes. Any logged series can be exported to a CSV file, which opens directly in Excel, Google Sheets or any analysis tool.
Is data logging available in the free Standard edition?+
The Historian is a Pro-edition feature. ModbusManager Standard ($49) covers polling, slave mode and simulation; the Historian and alarm system are part of Pro ($119).

Start logging your Modbus data free for 14 days

Download ModbusManager Pro and try the Historian, trend charts and CSV export on your own devices. No credit card, no cloud, no subscription.

Download Pro trial See pricing

Windows 10/11 · 14-day trial · Pro from $119 one-time