Hello,
I’m currently working on a project in which the update speed of the I/O on my Axioline Local Bus is very important.
When i opened the PlcNext Engineer project I saw that there was no trigger task specified for the Axioline F Local Bus. When i looked at the documentation located here: Specifying the refresh interval for Axioline F I/O data (plcnext.help), I noticed the following: “If you do not select a task, the firmware automatically calculates an interval for updating the Axioline F I/O data from the interval times of all available cyclic tasks.”. I have two cyclic tasks. One is ran every 0.5ms, the other one is ran every 100ms.
I was wondering what the interval time is with this configuration when I leave the Trigger Task as unspecified. Is it also a good idea to connect to set my most critical task as the trigger task for the Axioline F? If this makes a difference, I might have to re-execute some of my tests.
I’m running on a AXC-F-3152 with firmware, sdk and PlcNext Engineer version 2021.9
Best Regards,
Daan
With that configuration, the Axioline I/O update interval will be 0.5 ms.
If no update task is specified, the calculation basically determines the “Highest Common Factor” between all the cyclic task times.
If you want to be sure, then you can set the Axioline I/O update task to the faster of the two tasks.