Industry Online Support
Technical Forum
Navigation
Rating 
Thanks 0
3 Entries
| 2/9/2010 1:24 PM | |
|
Posts: 2 Rating:
|
HOW CAN I CALCULATE CYCLE TIME OF CPU412-3H?( I WANT IT'S BEEN LESS THAN 120mS WITH 1000 I/O ) |
| 2/9/2010 1:44 PM | |
Joined: 9/28/2005 Last visit: 11/5/2024 Posts: 2957 Rating:
|
Hello, You can go online with CPU and see it 'in action' and how long is cycle time. Other method (painful) is to download instruction list of the PLC and try to calculate instruction by instruction keeping in mind any possible jumps or loops. Here you can find info on every instruction run time http://support.automation.siemens.com/WW/view/en/23904435 Also keep in mind that cycle time depends on complexity of algorithm more than on I/O count itself. It depends on how many PIDs you have, how much communication partners you configure and so on. I had a project with more than 5000 I/O and it was run on single S7-417H PLC and cycle time was 60-70 ms. So I can say 'it depends...'. If you know algorithm try to estimate cycle time from instruction list I gave you. |
Last edited by: Darius at: 2/9/2010 2:53 PMBest regards, |
|
| 2/13/2010 9:10 PM | |
|
Posts: 86 Rating:
|
Keep in mind the diference between a cpu 412 and a cpu 417!! Yer |
Follow us on