Modbus Technology

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Date: 2015-07-06

ModbusModbus Technology

Modbus is a widely used serial based communications protocol that is usually transmitted over copper wires or Ethernet cabling. Publihed in 1979, Modbus is a free and easy to use protocol that allows multiple devices to be connected to the same network. There're two forms of Modbus protocols: Modbus RTU which communicates over two copper wires and Modbus TCP which communicates over an Ethernet cable. Most SCADA and HMI software support Modbus, so that Modbus based modules can be easily integrated with SCADA system, PC, and controllers. Data Acquisition is the gathering of real world physical information and the conversion of that information into digital numeric values that computers and controllers can understand. Modbus based Data Acquisition devices include Voltage, Current, RTD, Thermistor, Thermocouple, Strain Gauge, Counter, Frequency, Relay, Digital Input, and Digital Output. Modbus Data Acquisition Technology is widely used in industrial automation, remote monitoring, wastewater monitoring, process control, and building automation for testing, measurement, control, monitoring and automation.

Modbus Remote I/O ModulesModbus Based Remote I/O Modules

ICP DAS USA provides Modbus based din rail mountable remote I/O modules in many configurations. They come with a variety of combination of analog input, analog output, digital input and digital output. Modbus based remote I/O can be used with PLC's, Embedded Controllers, Data Loggers and SCADA software.  The Modbus TCP Based Dual Ethernet Port ET-7200 and PoE PET-7000 support daisy chain topology, which allows you to save costs on cabling.  The M-7000 and tM Series support Modbus RTU Protocol.  Wireless Zigbee ZT-2000 I/O supports Modbus RTU and Wi-Fi based WF-2000 supports Modbus TCP so that it is easy to integrate Modbus network with wireless networks.


How to Make a Modbus Connection with Indusoft SCADA SoftwareHow to Make a Modbus TCP Connection with SCADA Software

SCADA Control and Monitoring Software like Indusoft, Wonderware, and KingView can display information from Modbus based equipment through Modbus software drivers.    With SCADA software, you can generate reports, log data, and display information from Modbus equipment.  Information is displayed n in SCADA software through tags or data points.  In the project explorer on the leftside of Indusoft in the communication tab, you can right click on drivers,and then select the Modbus driver to add the Modbus driver.   You can connfigure your driver communication in the main driver sheet for communication with your devices.  By right clicking on the Modbus driver you added, you can click on settings to configure the COM port, baud rate and other modbus settings.  Click here to see step by step instructions on how to make a Modbus TCP Connection with SCADA Software.


Modbus Data Acquisition Controllers
Modbus Data Acquisition Controllers

Configurable Modbus based Data Acquisition Controllers allow you to configure IF-Then-Else type control logic through a web browser, send email alarms based on configurable conditions, trigger outputs based on inputs and to check the status through a web page from a remote location. WISE (Web Inside, Smart Engine) is our new data acquisition product series for remote logic control and monitoring in various industrial applications. WISE data acquisition controllers provide full data acquisition and control capacity. All configuration is done through a web interface and no programming skill is required. Our WISE data acquisition products come with our FREE EZ Data Logger Software for data logging and data acquisition.


Modbus Data ConcentratorsModbus Data Concentrators

Modbus Data Concentrators allow up to 8 Modbus TCP Masters to to read / write up to 200 commands to Modbus slave devices via RS-232 / RS-485. Their shared memory can be used to store the data from slave devices. Modbus Data Concentrators reduce the time it takes to read and write data to and from multiple Modbus RTU slave devices. Modbus Data Concentrators can be used in applications like process control, automation, power monitoring, remote monitoring and control. The MDC-711 and MDC-714 provided by ICP DAS have a built-in web server, which allows for quick and easy configuration and access to the performance data of each Modbus RTU command on the RS-232 / RS-485. They support Modbus TCP, RS-232, RS-485 communication interfaces.    

HMIWorks Development Software

HMIWorks Modbus Based HMI Development Software

HMIWorks is a Ladder Logic and C Language based development software for Modbus based Touch Screen PLC's includng the TPD and VPD series.   It is easy to use and many objects and widgets are provided for shapes, text, pictures, lines, timers, labels, buttons, checkboxes, slider, bar graphs and lines for interfacing with Modbus equipment.  Many function blocks and demo programs are provided along with an extensive graphcs library. HMIWorks features "What You See Is What You Get" design, which requires no programming skills and allows users very easy to customize the screen of the HMI controllers. It is easy to integrate with other I/O's like ET-7000/PET-7000 Modbus TCP modules, M-7000 Modbus RTU modules, I-7000 DCON modules and user-defined third party Modbus TCP devices. Click here to download the free HMIWorks software.

Modbus based ControllersModbus Based Controllers & Demo Programs

We provide many different Modbus Based Programmable Controllers along with free demo programs.  Our Modbus TouchPAD Touch Screen PLC Demo Programs are available in Ladder Logic and C Language.   Our I-7188EX-MTCP Demo Programs are available in C Language.  Our G-4500-3GWA Modbus Cellular Wireless Demo Programs are available in C Language.  Our Modbus SDK for WinPAC provides Master Slave Client Server demo programs in VS.NET and eVC.


Modbus Utility
Modbus Utility

Modbus Utility is a free software we provide for configuring Modbus TCP based equipment including the ET-7000, PET-7000, tET Series, and tPET Series.  They can be used to configure Modbus TCP embedded controllers like I-7188EX-MTCP through its easy user-interface. It also comes with a Modbus TCP and a Modbus RTU client with Visual Basic 6 source code. Both English and Chinese instructions are provided as well for the various demands of different users. To download the free Modbus Utility, please visit here.


Maria Santella, Sales Manager    1-888-971-9888 ext 105      

ICP DAS USA is a manufacturer of Industrial Data Acquisition, Data Communication, Automation & Control and Test & Measurement products; specializing in: PLC Hardware, Touch Screen HMI Devices, Programmable Automation Controllers, Distributed I/O modules, Smart Power Meters, Protocol Converters, Industrial Ethernet Switches, PCI and ISA boards, and much more! We provide free technical support and system integration services at your needs.

Left3 Easy-to-use Software for Data Logging | Types of Low Powered DAQ Left