flukie
Member
Just something I was thinking about today... Are there any general requirements about cycle times for industrial controllers? What should be considered as safe? Where I something have problems with is that I always try to choose the controller to use in an application as economical as possible ( lets say i'm looking I can have the required memory with that controller, then communication possibilities and sometimes the amount of instructions / ms ).
I was today programming on a siemens 414-2 DP and was notifying that I was having a run cycle time of about 32 ms which looks nice? Another Siemens controller 315-2DP I was busy on had a run cycle time of 76 ms which was kinda much in my eyes - however that reaction of the controller still occures in 152 ms in worst case scenario, faster than me on a monday morning ;-) ( Long cycle time 'cause of lots of calculations and loops with pointers ).
It this fast or slow ? Other controllers I work with are Allen Bradley Mitshibusi & OMRON which gives me mostly very low cycle times ( lets say 10 ms ) as I use those mostly for easier programs. B&R controllers have the adventage of constant cycle times you can set.
Would you think it would make sense to choose a faster CPU just to reduce your cycle time?
Just my thoughts,
Flukie
I was today programming on a siemens 414-2 DP and was notifying that I was having a run cycle time of about 32 ms which looks nice? Another Siemens controller 315-2DP I was busy on had a run cycle time of 76 ms which was kinda much in my eyes - however that reaction of the controller still occures in 152 ms in worst case scenario, faster than me on a monday morning ;-) ( Long cycle time 'cause of lots of calculations and loops with pointers ).
It this fast or slow ? Other controllers I work with are Allen Bradley Mitshibusi & OMRON which gives me mostly very low cycle times ( lets say 10 ms ) as I use those mostly for easier programs. B&R controllers have the adventage of constant cycle times you can set.
Would you think it would make sense to choose a faster CPU just to reduce your cycle time?
Just my thoughts,
Flukie