https://forge.codesys.com/forge/talk/Engineering/thread/d51ad2277b/2020-02-27T13:48:05.311000ZRecent posts to Variable not generating alarm on AlarmGroup2020-02-27T13:48:05.311000Z2020-02-27T13:48:05.311000Zdarius-danhttps://forge.codesys.com/u/darius-dan/https://forge.codesys.com6435c58f4c1630d5edeb7ca92e90aa6f92384e07

<div class="markdown_content"><blockquote> <p><strong>TimvH hat geschrieben:</strong><br/> Never tested this myself, but what you might check:<br/> - in the Task Configuration is a implicit call to the AlarmManager.Alarm_Prg.<br/> - the scan-time is 50ms (default for the Control Win)<br/> - Probably your program is called from the MainTask which is called every 20ms<br/> - If this is true, than you program has already set the alarm variable to false before the Alarm_Prg has seen is.<br/> Maybe by playing with these settings a little you can optimize it, but as mentioned, I am not sure so please let us know your results.<br/> Another solution could also be to extend the time this alarm bit is true with e.g. a TOF timer.</p> </blockquote> <p>YOU'RE RIGHT!</p> <p>I changed the alarm task to 20ms like the Main task and it triggered just fine. Thanks.</p></div>

2020-02-27T13:48:05.250000Z2020-02-27T13:48:05.250000Ztimvhhttps://forge.codesys.com/u/timvh/https://forge.codesys.come5dc3be4a9a605f64024e4c838511164508a85bf

<div class="markdown_content"><p>Never tested this myself, but what you might check:<br/> - in the Task Configuration is a implicit call to the AlarmManager.Alarm_Prg.<br/> - the scan-time is 50ms (default for the Control Win)<br/> - Probably your program is called from the MainTask which is called every 20ms<br/> - If this is true, than you program has already set the alarm variable to false before the Alarm_Prg has seen is.</p> <p>Maybe by playing with these settings a little you can optimize it, but as mentioned, I am not sure so please let us know your results.<br/> Another solution could also be to extend the time this alarm bit is true with e.g. a TOF timer.</p></div>

2020-02-27T13:48:05.188000Z2020-02-27T13:48:05.188000Zdarius-danhttps://forge.codesys.com/u/darius-dan/https://forge.codesys.com3c943eb3f5c01be64741529086b78aa46f8371ff

<div class="markdown_content"><p>Hi.</p> <p>I have a simple Ladder program that has this:</p> <ul> <li>"Low Flow Switch" forwarded by a "Pump on" status.</li> <li>If both are true, after some time, it sets a "Low Flow alarm".</li> <li>"Low Flow alarm" turns off the pump.</li> <li>Now, as the pump is off, "Low Flow alarm" is also false.</li> </ul> <p>The problem is: "Low Flow alarm" is only true for a single scan, and it is not showing on the Alarm Table on the WebVisu. If I remove the "Pump on" status from the logic, for testing purposes, it works. Is there a minimum time the variable needs to remain true so AlarmGroup triggers its alarm?</p></div>