Easy Modbus Viewer Screenshot.jpg

MODBUS data logging

Log and save MODBUS RTU communication in text file format.

Data from registers in one table

Table data on the left provides a quick look at the current Modbus register values and lets you specify your own register alias names. 

Live trending plot for data trend overview

Right (green) side of the user interface displays data trends graphically so that you can quickly see how data changes in real time. Zoom and pan the plot to view the data as it changes.  Set minimum and maximum axis values or let the plot automatically pan to keep the latest data visible.  Preform all of these functions in real-time as the plot updates with the latest data.  


Easy Modbus Viewer Screenshot.jpg

Advanced Features

Multiple register readout

Multiple Modbus channels function lets you interface with many different Modbus registers simultaneously.

Automatic data logging

Select which data to log into an external text file in .CSV format so that is can be easily be opened and edited in Microsoft Excel.  

  • Each log entry contains a date and time stamp for easy review and analysis
  • Data is logged in real time
  • File names include the date and time the file was created along with optional user specified text
  • New log files are automatically created when the maximum file size is exceeded

Sensor Configuration Utility.jpg

Setup & Configuration

Easy to use setup screen

Use the setup screen to configure which data to log, logging interval and scale factor for each Modbus register. Save the entire configuration to file for later use.  

Utility for setup of BARANI DESIGN sensors

As shown in the screenshot, multiple BARANI DESIGN sensors can be simultaneously configured using this utility to make working our with MODBUS sensors a breeze.

Easy Modbus Viewer Screenshot.jpg

Application Notes

To access multiple Modbus RTU devices simultaneously, all the devices have to be configured to use the same baud rate, comm port, stop bits, and parity.  

Easy MODBUs Viewer uses standard Modbus Serial RTU protocol.  

Cyclical redundancy checking is used and reads 16 bit Modbus register values. Reading of 32 and 64 bit values as integers and floating point values is available.  Less common applications will use swapped register values or values requiring byte offsets, please contact us for customization.  

Rather than limiting the user to a specific configuration, a wide range of settings are allowed in this software. 

  • No set limit on the number of register channels that can be read from Modbus slave devices.  
  • Logging to CSV files at speeds of up to 250 ms.  Under certain conditions, if logging speed is faster than than the speed of serial communication, duplicate values will be logged, and the data table background (left side of screen will turn yellow.   

Hardware compatibility

Many types of serial hardware types are available and can be used such as RS232, RS485, ect. 

  • Please make sure you have the correct type of hardware for the device you are trying to read.  
  • We recommend FTDI chip based hardware for serial communication over a USB port.
  • Not all hardware is equal and we have good experience with the USB-COMi-M usb-to-serial converter from Serial Gear.  This device is reliable, configurable for most serial data types, and has LEDs for transmit and receive troubleshooting.  Other serial converters will also work.  

Free Trial Download

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To download the free trial of Easy Modbus Viewer without providing us with the info above and feedback, please click here.

Trial software instructions

After submitting the form, you will be navigated to a download link containing a zip file for the trial version of the program.  Unzip the file and run the setup file inside.  

Trial limitations

 This trial version of Easy MODBUS Viewer is for evaluation purposes only. The trial version is a full featured version of Easy MODBUS viewer that will automatically close after 10 minutes of runtime.  You may re-run the trial version as many times as you like.  

Current software version:

Easy MODBUS Viewer 1.5.2 CHANGE LOG: Easy Modbus Viewer changelog.txt