Hello everybody,
I am new and looking for help with S7 FB 41.
Closed loop pressure control - valve QBS2 I use its monitor line as feedback input to AI and then I want to drive it from AO card with 4...20mA.
There must have been some rescalling work done as I only get 2.8-10.5 mA out from it ( over 0-6Bar) and this is what I need to feed in to analogue card.
Is it still possible to work with Siemens FB41?
Also, its my first PID I attempt and I have no clue which ports I should assign scaled values.
I am looking for some working example in ladder logic. I done tons of research online but found nothing that I could really understand.
It is handwritten as PDFs were too big.
Any help much appreciated.
Regards,
Rob
[email protected]
I am new and looking for help with S7 FB 41.
Closed loop pressure control - valve QBS2 I use its monitor line as feedback input to AI and then I want to drive it from AO card with 4...20mA.
There must have been some rescalling work done as I only get 2.8-10.5 mA out from it ( over 0-6Bar) and this is what I need to feed in to analogue card.
Is it still possible to work with Siemens FB41?
Also, its my first PID I attempt and I have no clue which ports I should assign scaled values.
I am looking for some working example in ladder logic. I done tons of research online but found nothing that I could really understand.
It is handwritten as PDFs were too big.
Any help much appreciated.
Regards,
Rob
[email protected]