How to Read Data from a Modbus RS485 Temperature Sensor
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How to Read Data from a Modbus RS485 Temperature Sensor

Learn how to take a Modbus RS485 enabled device from scratch and connect it to a Modbus RS485 network
4.9 (38 ratings)
Instead of using a simple lifetime average, Udemy calculates a course's star rating by considering a number of different factors such as the number of ratings, the age of ratings, and the likelihood of fraudulent ratings.
133 students enrolled
Created by Emile Ackbarali
Last updated 2/2017
English
Current price: $10 Original price: $40 Discount: 75% off
5 hours left at this price!
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Includes:
  • 1 hour on-demand video
  • Full lifetime access
  • Access on mobile and TV
  • Certificate of Completion
What Will I Learn?
  • Analyze Modbus device documentation
  • Analyze RS485 serial communications documentation
  • Make RS485 serial communications connections
  • Use software tools to test/verify Modbus register addresses and values
  • Understand the address offset issue experienced with some Modbus masters
  • Create a Human Machine Interface to display Modbus data in a user-friendly format
View Curriculum
Requirements
  • Basic working knowledge of the Modbus RTU protocol.
  • Familiarity with the installation of software applications on the Windows OS platform.
Description

This course as created as a result of requests of students who wanted to have a single example of a Modbus-enabled RS485 device being taken "out of the box" and the steps taken to connect the device onto a Modbus RS485 network where it's data values could be read and displayed.

The course uses a Temperature / Humidity sensor that has Modbus RS485 capability, as the device to be connected to the Modbus network. The documentation associated with the device is analyzed and is then used to configure Modbus master test software, where register addresses are confirmed.

The device is connected to a PC via a USB-to-RS485 converter. 

After verification of data register addresses, a Human Machine Interface (HMI) application is created using an application called Winlog Lite. The HMI application is then used to read the data values from the Modbus device and display those values in a user-friendly format.

The course is extremely practical and steps he student through the complete process in a very systematic and logical manner. As the software tools are all free trials, the student will be able to download the applications and practice further. 

Who is the target audience?
  • Electrical Engineers
  • Electrical Technicians
  • Electrical Tech or Engineering Students
  • Process Control Technicians and Engineers
  • Process Automation Engineers
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Curriculum For This Course
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Introduction
2 Lectures 06:22

Using a schematic, the architecture of the network that will be built is explained. 

An Overview of What We Are Going To Build
02:59
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Downloading the Software Applications
3 Lectures 07:05

Modsim32 is the Modbus master simulator that will be used to read data from the device.

Preview 01:52

Winlog Lite is the HMI development software application. It is the main application that will be used in the course.

Preview 02:22

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A Look at the Modbus RS485 Temperature/Humidity Sensor
3 Lectures 11:20

We have a look at the website from which the sensor was purchased.

Preview 03:25

We look at the datasheet for the sensor to determine the communication details.

A Look at the Datasheet for the Sensor
05:47

We have a quick look at the sensor as I have it on my work bench.

A Quick Look at the Sensor on my Work Bench
02:08
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Connecting to the Sensor using Modscan32
3 Lectures 08:10

An overview of the objective of the section.

What we are going to do in this Section
02:07

Initial configuration is done to Modscan32 to prepare for reading of the Modbus data from the sensor.

Configuring Modscan32 to Read Data from the Sensor
03:00

A live connection is made to the sensor using Modscan32 and the results assessed.

Live Reading of Modbus Data from the Sensor
03:03
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Connecting to the Sensor using Winlog Lite HMI
3 Lectures 13:24

The first part of the process of creating the HMI using Winlog Lite.

Creating the HMI using Winlog Lite - Part 1
06:33

The second part of the process of creating the HMI using Winlog Lite.

Creating the HMI using Winlog Lite - Part 2
04:12

The configured HMI is run and live communication with the sensor takes place. 

Running the Winlog Lite HMI
02:39
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Conclusion
1 Lecture 02:10

What to do next to keep further solidify learning.

The End - Where To Go From Here
02:10
About the Instructor
Emile Ackbarali
4.5 Average rating
1,025 Reviews
2,495 Students
13 Courses
Software Developer, Systems Integrator and Entrepreneur

I have been working in the fields of Software Development, Software Systems Integration and Process Automation since 1996. In 2003, I stepped out on my own and started working for myself providing software development and systems integration services to small and medium businesses.

I am also associated with a great company called Mora Systems Limited that under the leadership of it's Managing Director has produced innovative and outstanding products and services in the fields of GIS and Cellular based SCADA.

Teaching has always been a passion for me. I have taught at the tertiary level for many years on the subjects of programming, control systems as well as systems integration. In the last few years I found myself incorporating more and more videos into the curriculum with amazing results.

When I heard of uDemy I just could not help but sign up. With teaching in a classroom, you can reach only so many students, but with uDemy you can reach the world! I plan to publish and promote as many courses as I possibly can on the uDemy platform.