Internal Binary Bool

Hello! I have a old code from a allen bradley plc that i am going to write similar but in tia portal. I have come across a problem that i was hoping u guys could solve, In the allen bradley they have something called B3 which is like an internal bool without output that you just latch and unlatch in the program.

I was looking for something that works the same way in tia portal but havent found anything yet.

The message i get when i try to do it is "Constant with type BOOL can not be used in this statement"

Hi!

First of all I have a feeling that you should ask your question in this conference. Pls note the "Template for the new topics" topic there.

You wrote about the message you got. It could be helpful if you showed what you had done.

U_0b649ca4-b2ac-48e4-b7b9-4fa516557ca9

Hello! I have a old code from a allen bradley plc that i am going to write similar but in tia portal. I have come across a problem that i was hoping u guys could solve, In the allen bradley they have something called B3 which is like an internal bool without output that you just latch and unlatch in the program.

I was looking for something that works the same way in tia portal but havent found anything yet.

The message i get when i try to do it is "Constant with type BOOL can not be used in this statement"

As Mr. Jacek mentioned.. much more information is needed. A screen grab of the code as you have it for the AB controller would help. Mention also which controller the design was made for. I am guessing it is the Micrologix, but confirmation would be good.

There is nothing special about the B3 range of bits. It would be the equivalent of having M-bits or perhaps better to think of B3 as a non-optimized DB with only bits (grouped as 16-bit words) inside.

AB       Siemens
--(L)    --(S)
--(U)    --(R)