Bering C Sparky
Lifetime Supporting Member
Hello,
Just starting to learn the Logix5000 platform. (for those who have not seen my previous post)
What I have read says that the Logix5000 platform is Asynchronous and you should map your "Real" inputs onto seperate rungs at the beginning of your program and assign a "Internal" coil for each of them. Then use these internal coils as the inputs in your program.
I follow the logic in this but have a couple of questions.
1) Are most of you following this layout when you program in Logix5000?
2) The controller I am using has embedded High Speed Counters, would these also be considered inputs, same as say a DI and should you map these to internal coils also. Or because they are high speed this would not be a good thing to do?
(I will only be using each HSC input one time (in one place) in my program so it should not affect me one way or the other but I was just curious as to what would be the norm or correct)
3) When mapping out the inputs should you go ahead and map out all the inputs, even ones that you will not be using and just label them as spare so they are in the program and ready to be used when needed.
The processor will have to scan all of these each time, even though you are not using them. That seems a bit wasteful but this is what they have done in the example I am looking at.
Whats your opinion on this.
(My program will be relativly small so it probably will not affect me either way, again I am just curious as to what would be the norm or correct)
Thanks,
BCS
Just starting to learn the Logix5000 platform. (for those who have not seen my previous post)
What I have read says that the Logix5000 platform is Asynchronous and you should map your "Real" inputs onto seperate rungs at the beginning of your program and assign a "Internal" coil for each of them. Then use these internal coils as the inputs in your program.
I follow the logic in this but have a couple of questions.
1) Are most of you following this layout when you program in Logix5000?
2) The controller I am using has embedded High Speed Counters, would these also be considered inputs, same as say a DI and should you map these to internal coils also. Or because they are high speed this would not be a good thing to do?
(I will only be using each HSC input one time (in one place) in my program so it should not affect me one way or the other but I was just curious as to what would be the norm or correct)
3) When mapping out the inputs should you go ahead and map out all the inputs, even ones that you will not be using and just label them as spare so they are in the program and ready to be used when needed.
The processor will have to scan all of these each time, even though you are not using them. That seems a bit wasteful but this is what they have done in the example I am looking at.
Whats your opinion on this.
(My program will be relativly small so it probably will not affect me either way, again I am just curious as to what would be the norm or correct)
Thanks,
BCS