# Driven Scan Class Complete Notification

**URL:** <https://forum.inductiveautomation.com/t/driven-scan-class-complete-notification/44377>\
**Category:** Ignition\
**Created:** [March 11, 2021, 7:21pm UTC](https://forum.inductiveautomation.com/t/driven-scan-class-complete-notification/44377 "2021-03-11T19:21:13Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![CJVR](https://avatars.discourse-cdn.com/v4/letter/c/0ea827/32.png) [@CJVR](https://forum.inductiveautomation.com/u/CJVR)\
**Post date:** [March 11, 2021, 7:21pm UTC](https://forum.inductiveautomation.com/t/driven-scan-class-complete-notification/44377/1 "2021-03-11T19:21:13Z")

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We are setting up a tag as an array with 6000 elements that will read an array from a PLC when instructed to. We were thinking of using a separate scan class for the tag, making it driven, setting one shot to true, and using a tag to trigger a read when necessary. Is this the best way to do this? We do not need to monitor the array; we just need it at the end of a cycle. If this is a goo methos is there a way to know when the read is complete?

Thanks,

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [March 11, 2021, 9:43pm UTC](https://forum.inductiveautomation.com/t/driven-scan-class-complete-notification/44377/2 "2021-03-11T21:43:56Z")

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This is a job for a scripted read with system.opc.readValues().

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**Author:** ![CJVR](https://avatars.discourse-cdn.com/v4/letter/c/0ea827/32.png) [@CJVR](https://forum.inductiveautomation.com/u/CJVR)\
**Post date:** [March 11, 2021, 10:34pm UTC](https://forum.inductiveautomation.com/t/driven-scan-class-complete-notification/44377/3 "2021-03-11T22:34:50Z")

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@pturmel, it absolutely is!! Thanks.