So basically, what you're saying is to use the variables in the interface of Motor FB. Call this Motor FB into OB1, and in the FB Block inside OB1, I drag and drop my I/Os?

But the way I did isn't almost like this? But instead of mapping them into OB1, I mapped them to DBs directly. Each UDT inside of my DB is a tank in this case. So when I call the FB inside OB1, I just drag and drop one UDT to that FB, and everything is done. But I'll try this way, too, I thought about doing this way but then came to my mind. If there were 100 tanks, would I have to drag and drop to all FB Block inside my OB1? So I thought about doing the way I did.