Premium Only Content

Node-RED Modbus RTU / TCP Communication
Node-RED can easily connect to industrial controls using Modbus communication. Modbus is a master-slave type of communication. Masters will always send the commands to read or write to the slaves on the network. The slaves will respond if the communication is directed at them.
We will be installing the node-red-contrib-modbus palette. This will allow us to communicate Modbus serial (RS485) RTU to a Solo process temperature controller. We will then use Modbus Ethernet TCP to communicate to a Click PLC.
Note: When using Modbus TCP (Ethernet) the master is referred to as the Client and the slave is a Server.
Node-RED will be used to create a single Modbus flow. We will communicate to our Solo process temperature controller using Modbus RTU on a serial RS485 network. The present and set values of the controller will be read. These values will then be written to our Click PLC using an Ethernet Modbus TCP network. A set value from an analog input on the Click will be used to then write to the Solo. This will happen every 200 milliseconds or 5 times per second.
Let’s get started using Node-RED for Modbus communication.
Connect to our industrial equipment using the Modbus protocol. Additional information can be found on our website at the following URL:
https://accautomation.ca/node-red-modbus-rtu-tcp-communication/
There are several reasons why we are using Node-RED. Here are just a few.
- Built on top of the most dependable programming language JavaScript.
- JavaScript is flexible and easy to work with on web browsers, server-side, IoT, IIoT projects, and more.
- Visual flow type interface making programming easy.
- Node will allow JavaScript code to run directly on a computer.
- Node-RED is a free, open-source logic engine.
- Connect to PLC, PAC, Temperature Controllers, Process Controllers using standard protocols.
- Save and read from databases
- Easily make the Internet of Things (IoT, IIoT) industrial solutions.
Node-RED provides the ability for you to quickly create custom control solutions.
-
6:34
Buddy Brown
7 hours ago $0.03 earnedWatch What Happens When WELFARE QUEENS Get Denied FOOD STAMPS! | Buddy Brown
13.2K12 -
LIVE
Drew Hernandez
14 hours agoCHARLIE KIRK TRIAL JUDGE ISSUES GAG ORDER & U.S. MARSHAL ILLEGAL ALIEN SHOOTOUT?
954 watching -
LIVE
DLDAfterDark
2 hours agoIs Glock Anti 2A?? Glocks Terrible Recent Decisions & More
144 watching -
1:58:02
tminnzy
2 hours agoLAST REMAINING BLACK OPS 6 PLAYER 🦁
11.6K -
LIVE
Side Scrollers Podcast
2 days ago🔴SIDE SCROLLERS FUND-A-THON🔴DAY 2🔴100% REVENUE HELPS CHANGE CULTURE!
975 watching -
1:47:13
Flyover Conservatives
22 hours agoURGENT UPDATE: Why Halloween Matters This Year— October 24-31 w/ Bo Polny | FOC Show
20.2K -
LIVE
This is the Ray Gaming
2 hours ago $0.10 earnedI'm All Out Of Tacos | Rumble Premium Creator
16 watching -
LIVE
SpartakusLIVE
5 hours agoHE'S BACK || The #1 KING of Content has ARRIVED
160 watching -
4:40:20
Spartan
6 hours agoOMiT Spartan | Graduated college woohoo and last stream before worlds
2.79K -
30:55
Producer Michael
10 hours agoFINALLY....Something Different!!
9.72K2