5/24/2011 1:58 PM | |
Joined: 1/28/2009 Last visit: 9/10/2024 Posts: 6849 Rating: (1365) |
Hi The original point is using FC with temp variables are not reliable , so using an FB suggested. In some cases multiple call of FC may lead to satisfactory result, But most of the time when you need to keep status of some variable (e.g in FP,FN) in memories, using FBs is more reliable. Check the following codes and comparison made in attachment which persuade us to use FBs. regards AttachmentFC_OR_FB.zip (100 Downloads) |
5/24/2011 3:05 PM | |
Joined: 10/7/2005 Last visit: 9/24/2024 Posts: 3022 Rating: (1054)
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I'm sorry hdhosseini, but I need to strongly disagree with this as it may lead people to think there is something "wrong" with FC's or that their behaviour can be unpredictable. If the FC is programmed properly, it will always lead to satisfactory results and theissue of incorrect usage of TEMP variables affects FC's and FB's equally.
I disgree again, using IN_OUT Parameters of an FC to memorise values between calls worksjust as reliable as using STAT variables in an FB. Bottom line: The problem is not related to using FC over FB and one being amore "reliable" choice. The problem is simply related to incorrect usage of TEMP variables, which is nothing more and nothing less than a programming/user mistake. |
Last edited by: fritz at: 5/24/2011 4:04 PMfized typos Cheers |
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