This article is about communication between InTouch SCADA and Allen Bradley PLC with a ladder logic example with screenshots.
InTouch Scada and Allen Bradley PLC
Do follow the below steps for establishing the communication process.
Open RSlogix software along with RSlinx and emulator.
Create a new project in RSlogix and established communication with an emulator.
Open InTouch SCADA software.
As you can see in the below window of RSlogix I have created a small example with one input and output.
In branch, I have use memory bit which we will use in SCADA to give a command.
Now, let open RSlinx. Click on option “DDE/OPC” and choose “topic configuration”.
Following window will pop-up. Choose “New” to proceed.
Create a new topic as I have created communication and choose communication protocol. Click “apply” then “done” to proceed.
Now open InTouch SCADA. Create a new project.
As we have used one input and output we have to create one input button and output button as shown in the below window.
Hit double click on a button will open up the following window. Choose “Discrete” will open up a new window.
Give a name to button and hit “ok” to proceed.
Choose I/O Discrete in the “Type” option. Then click on “access name”.
Write a bit address in “item” for input which we have used in the programming software (check step no. 4).
Clicking on Access name will open another window. Click on “add” as shown in the below window.
This is a very important step to establish communication.
Access: Give any name
Application name: RSlogix
Topic name: communication (the same name we have used in step no. 7)
Choose “DDE” as a communication protocol and hit “ok” to proceed.
After configuration hit “save” and close the pop-up.
For output, we have select “fill color” property and choose “Discrete”.
Do follow the same procedure for output as shown in the below window.
Communication has established. Test the logic. Keep a window in “runtime” and put CPU in “run” mode.
As you can see in the below window output gets energized if I give the command from SCADA.
Author: Suhel Patel
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