I’ve got a question regarding RSLogix5000. If I was in the online edit mode and made a change to my code and saved that, would it retrigger a first scan? I’m wondering this because I am using a CPT block to convert units and only one the conversion to be done on the first scan, but if I were to change one of the values being converted, I would like it to still be updated. Any help?
RSLogix 5000 Question
- Thread starter tomizzo11
- Start date
Then you can do it every scan ?
Or you could write code that detects when one of the CPT operands changes to trigger the CPT again, but that would be more "costly" than executing the CPT every scan.
I’m still new to PLC programming and assumed that designing code that would do a conversion every scan as opposed to only one scan would be a waste of resources. The thing be converted really only needs to be done once for regular operations, but in the case of editing, I would need the CPT block to run again to update the change.
jstolaruk
Lifetime Supporting Member
Create a temporary Boolean tag and put it in parallel with the xic s:fs and then manually change it on then off. Commonly referred to as a debug tag.
Just so you get the picture properly - the code you might design to detect a change in a parameter to re-trigger the CPT would be less efficient then just doing the CPT every scan.
Just put the CPT in the MainProgram somewhere, let it update the destination tag every scan, and forget about it.
Just put the CPT in the MainProgram somewhere, let it update the destination tag every scan, and forget about it.
Similar Topics
So I have a PID loop on an 1756-L61 running V17 software just for background.
Also the PID PV is a pressure transmitter and the CV is speed sent...
Hello Please Help, I want to use a FSC instruction that will scan 20 DINT arrays. If the arrays are greater than 1000 display the value. How do I...
Hey all,
I just joined today. Not sure if this question is in the right place or if anyone has asked it before.
I am monitoring a machine from...
Note, I have NO experience with RSLogix products. Never done anything beyond installing the software for others. Please forgive me for my...
Good day everyone. I would like to ask something regarding PID Instruction. I noticed one of our machine's PID instruction status is showing "PID...