# Scheduled event runs only on the hour instead of every 15 minutes

**URL:** <https://forum.inductiveautomation.com/t/scheduled-event-runs-only-on-the-hour-instead-of-every-15-minutes/58591>\
**Category:** Ignition\
**Created:** [April 19, 2022, 1:51pm UTC](https://forum.inductiveautomation.com/t/scheduled-event-runs-only-on-the-hour-instead-of-every-15-minutes/58591 "2022-04-19T13:51:52Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Transistor](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/transistor/32/3380_2.png) [@Transistor](https://forum.inductiveautomation.com/u/Transistor)\
**Post date:** [April 19, 2022, 1:51pm UTC](https://forum.inductiveautomation.com/t/scheduled-event-runs-only-on-the-hour-instead-of-every-15-minutes/58591/1 "2022-04-19T13:51:52Z")

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The following scheduled event should run at :00, :15, :30 and :45 past the hour.

 ![Cron 15 minute](https://us1.discourse-cdn.com/inductiveautomation/original/3X/3/4/345f5330e91036ce27437e24a5593f6ccababd66.png)

The `0/15` configuration seems to be interpreted correctly as shown in the _Preview_.  
The script writes to a data table and I can see that it has executed at 11:00, 12:00, 13:00, etc.

Can anyone suggest why this doesn’t work as expected?

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**Author:** ![dkhayes117](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/dkhayes117/32/68344_2.png) [@dkhayes117](https://forum.inductiveautomation.com/u/dkhayes117)\
**Post date:** [April 19, 2022, 1:56pm UTC](https://forum.inductiveautomation.com/t/scheduled-event-runs-only-on-the-hour-instead-of-every-15-minutes/58591/2 "2022-04-19T13:56:38Z")

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Try using `*/15` instead

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<div class="post-metadata">

**Author:** ![dkhayes117](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/dkhayes117/32/68344_2.png) [@dkhayes117](https://forum.inductiveautomation.com/u/dkhayes117)\
**Post date:** [April 19, 2022, 1:58pm UTC](https://forum.inductiveautomation.com/t/scheduled-event-runs-only-on-the-hour-instead-of-every-15-minutes/58591/3 "2022-04-19T13:58:22Z")

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Actually try using `0,15,30,45`

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<div class="post-metadata">

**Author:** ![Transistor](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/transistor/32/3380_2.png) [@Transistor](https://forum.inductiveautomation.com/u/Transistor)\
**Post date:** [April 19, 2022, 1:59pm UTC](https://forum.inductiveautomation.com/t/scheduled-event-runs-only-on-the-hour-instead-of-every-15-minutes/58591/4 "2022-04-19T13:59:09Z")

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Done at 3 minutes to the hour. I’ll report back in 20 minutes or so.  
I liked the look of the 0/15 as it implied starting on the hour but I can see that all it can do is return a zero so it _only_ triggers on the hour.

I had tried 0,15,30,45 \* \* \* \* but wasn’t happy that Ignition understood it.

The \*/15 seems to have triggered correctly at 14:00:00. Let’s see at 14:15 (Irish time).

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**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [April 19, 2022, 3:17pm UTC](https://forum.inductiveautomation.com/t/scheduled-event-runs-only-on-the-hour-instead-of-every-15-minutes/58591/5 "2022-04-19T15:17:05Z")

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The preview validator is a bit simplistic and seems to allow patterns that are actually parsed differently, unfortunately.

Compare:  
[https://crontab.guru/#_/15\ ___\*__ \__](https://crontab.guru/#*/15_*_*_*_*)  
[https://crontab.guru/#0/15\ __\___ \*_\*](https://crontab.guru/#0/15_*_*_*_*)  
Note that the latter warns:  
Non standard! May not work with every cron.

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<div class="post-metadata">

**Author:** ![Transistor](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/transistor/32/3380_2.png) [@Transistor](https://forum.inductiveautomation.com/u/Transistor)\
**Post date:** [April 19, 2022, 3:32pm UTC](https://forum.inductiveautomation.com/t/scheduled-event-runs-only-on-the-hour-instead-of-every-15-minutes/58591/6 "2022-04-19T15:32:07Z")

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I’m running now with  
`0,15,30,45 * * * *`

It seems to be working, it’s unambiguous and it’s definitely on the quarter hour.

Thank you all.