Support Board
Date/Time: Sun, 22 Feb 2026 00:44:56 +0000
Post From: OS Timers vs SC Timers discussion again... SC Timers chart update limitations
| [2026-01-28 13:41:34] |
| @sstfrederik - Posts: 412 |
|
Great work on the timers. I am trying to see proof of custom study execution at the set chartupdate interval when UpdateAlways = 1. running SC version 2870. One chart, one custom study, code posted below. Chartupdate interval set at: 20ms. Minimum chartupdate interval in ms for ACSIL updatewalways: 20ms. Using SC timers. Timer management enabled. max delays 20ms. min delay 10ms. The custom study simply prints a line at every calculation. Not sure why the log isn't showing more output based on custom study calculations. Output is shown at ~200ms with regular occasions of ~500ms calculation intervals. What am I missing? Seems like the study calculations are not following the chartupdate and update always settings. With some of my work this will be a limitation for real-time applications. A custom study can't pick up any real-time data from other custom threads within 20ms if there is a 200ms gap. I see the same ~200-500ms gap on that custom work. Thanks for your time to look into this. SCSFExport scsf_SST_TestFunction(SCStudyGraphRef sc) { if (sc.SetDefaults) { // Set the study configuration and defaults. sc.StudyDescription = "Test"; sc.GraphName = "Test"; sc.AutoLoop = 0; sc.UpdateAlways = 1; return; } int& counter = sc.GetPersistentInt(1); // Data processing if(sc.IsFullRecalculation){ counter = 0; return; } //push message to log to see update interval SCString updateIntervalMsg; updateIntervalMsg.Format("Update interval counter is %d", counter); sc.AddMessageToLog(updateIntervalMsg, 1); counter++; } |