Posted 20 Jun 2018 Hallo. Im trying to make a fb where I have an array of sdt as an input output type. The reason is to have write and read access to my connected global vars inside the fb. This works fine in most cases. But when trying to use a bmov where moving an array of sdt input to the array of sdt I/O I get strange results. The first array element is correct. But then rest are mostly zeroes. It is writing zeroes. I tried the same outside the fb, and it works fine. Only thing I can think of is that inside the fb all vars gets a local random register. Maybe this can cause it to fail? the array of sdt input and array of sdt I/O are of same sdt type The sdt consist of mixed data types I’m using gx works 2 with a q plc can someone shed some light on this matter? and will using the array of sdt as input on fb cause more execution time? I’m thinking the cpu maybe have to cope the vars to local before using them? Share this post Link to post Share on other sites
Posted 21 Jun 2018 1. It's imposible to answer, not seeing your program. 2. There is not neccessary to transfer an array to the FB. It's easier to define it in GVL and then to access to its elements inside the FB by array index. Share this post Link to post Share on other sites
Posted 21 Jun 2018 1) not sure why you need to see the programme. It’s a general question about working with sdt. 2) so you’re saying to access global vars directly from inside the fb? Instead of adding locals to work with them? to break it down... I create a sdt named recipe i create 2 global vars. var1 = of recipe var2 =array(1..7) of recipe I then create a fb with 1 input = sdt (recipe) and 1 input/output = array(1..7) of sdt(recipe) What I want to do. Is to bmov the input vars to the input/output vars. Which doesn’t work. On the other hand. If use a move on a single var from the sdtit works fine. Share this post Link to post Share on other sites
Posted 22 Jun 2018 (edited) Se this is what you have in your FB. Works fine Edited 22 Jun 2018 by Gambit Share this post Link to post Share on other sites