Posted 27 Feb 2023 Hello there, I am new to the forum and had a question regarding a setting in Sysmac Studio. In the Basic Settings for my NJ301 there is a setting on this particular line that is set differently than the other lines I have worked on. This setting is called "System service execution time ratio". On all the other lines I have worked on it was set to 10%, on this line it's 25%. This line also seems to have the most issues with controller performance out of all the lines I have worked on despite having less complexity. I was wondering if anyone knew what this setting actually does and if it should be changed. Thank you. Share this post Link to post Share on other sites
Posted 27 Feb 2023 The Omron Gurus will probably give you a much simpler definition but Page 43 of the NJ301 Manual - https://assets.omron.eu/downloads/manual/en/w500_nj-series_cpu_unit_hardware_users_manual_en.pdf define the "System Service" as what I would call in laymans terms the "Overhead Processing". So at 10% you're leaving 90% for Program Scanning and Execution and 10% for Comms and Interrupt handling and etc. I suspect you can change it dropping the number in stages 20 - 15 and finally 10 if you can afford to ahve a line hiccup when the overhead doesn't get processed. Share this post Link to post Share on other sites