Moving large quantit of data TIA Portal

[mk42]

mk42 - Wow! Thanks for the last hint.

I did not know that was possible.

You're not the only one.

Moving PLC data types surprises a lot of people, but applying them to IO surprises even more. It's a massively useful feature that snuck in somewhere along the way and is flying under the radar. Doesn't work for M memory, for whatever reason, but works great for DB, I, & Q.

To me, its a huge help for things like drive telegrams (if you aren't using TOs), and for people who are used to structured IO data coming in on a Logix system. Sure, you have to make the structure yourself, but once you do that you can use it over and over, especially if you put it in a library. The only trick is to make sure you use one data type for the send, and one for the receive.

 

[jstolaruk]

We use that method as a standard but you have to sure that the DB or UDT definition matches up to the actual I/O order. If there is a insertion or deletion on either side, its outside of the capabilities of the compiler to catch it. I prefer to use UDTs because its not as easy to make a change once its all proven out.