Hi all,
somewhat new to AB from Siemens, ABB, etc. I tried to search the site for answers to these generic questions, but after entering 8-9 incorrect letter/number combinations (may be a browser issue), I gave up.
I'm using Studio 5000 v33 and 1756-L71 processor.
1) I've noticed that entering a value in the preset field of timers in AOIs doesn't actually take when downloaded. I have to actually change the value online. Any explanation, workaround, reason for this?
2) As far as I can tell, there are no ways to set initial values/constants in parameter tables or UDT's, correct? I've taken to using the first scan bit in AOI's to set initial values. Is there a better, or best practice way of doing this?
3) On remote download, I assume this is a warm restart where the new code starts executing again from the next scan cycle, and first scan bit isn't triggered, is this correct? Or how does this work in Controllogix exactly? How do I cold restart (not able to find this in the software)?
4) I know that I/O updates are asynchronous to scan cycle, is this done on an interrupt routine of some kind? Is there a way to change frequency of I/O updates (not that I really need/want to do this, just curious).
Thanks
somewhat new to AB from Siemens, ABB, etc. I tried to search the site for answers to these generic questions, but after entering 8-9 incorrect letter/number combinations (may be a browser issue), I gave up.
I'm using Studio 5000 v33 and 1756-L71 processor.
1) I've noticed that entering a value in the preset field of timers in AOIs doesn't actually take when downloaded. I have to actually change the value online. Any explanation, workaround, reason for this?
2) As far as I can tell, there are no ways to set initial values/constants in parameter tables or UDT's, correct? I've taken to using the first scan bit in AOI's to set initial values. Is there a better, or best practice way of doing this?
3) On remote download, I assume this is a warm restart where the new code starts executing again from the next scan cycle, and first scan bit isn't triggered, is this correct? Or how does this work in Controllogix exactly? How do I cold restart (not able to find this in the software)?
4) I know that I/O updates are asynchronous to scan cycle, is this done on an interrupt routine of some kind? Is there a way to change frequency of I/O updates (not that I really need/want to do this, just curious).
Thanks