Variable links problem in TwinCAT 3 on windows 10

Question

I am using TwinCAT 3 on Windows 10, and create a PLC project in visual studio 2013 shell(isolated). When I try to link an output variable to an input variable by “Change Link”, there is always no avaible variable to be linked.

The pop-up window is as following: Attach Variable pop-up window

What may be the problem?

Have you built your project? Are you sure you are using AT %I* etc? If both are yes, check the datatypes the Filippos answer. — Quirzo, Jul 03 '19 at 05:55

score 1 · Accepted Answer · answered Jul 02 '19 at 10:43

1

If you want to link the variable with a project instance variable you need to uncheck "exclude same image" otherwise if you want to link the variable with a hardware IO you need to have an IO tree attached to your Ethercat Master.

answered Jul 02 '19 at 10:43

Filippo Boido

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And of course you map a Software Input to a Hardware Input and a Software Output to a Hardware Output – Filippo Boido Jul 02 '19 at 10:51

Variable links problem in TwinCAT 3 on windows 10

1 Answers1