# Conveyor: Queue tracking mode

**URL:** <https://tech-community.robotics.abb.com/t/conveyor-queue-tracking-mode/1872>\
**Category:** Robot Controller\
**Created:** [May 22, 2008, 5:18pm UTC](https://tech-community.robotics.abb.com/t/conveyor-queue-tracking-mode/1872 "2008-05-22T17:18:38Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![system](https://dub1.discourse-cdn.com/flex005/user_avatar/tech-community.robotics.abb.com/system/32/6_2.png) [@system](https://tech-community.robotics.abb.com/u/system)\
**Post date:** [May 22, 2008, 5:18pm UTC](https://tech-community.robotics.abb.com/t/conveyor-queue-tracking-mode/1872/1 "2008-05-22T17:18:38Z")

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Hi!!

I need to program a IRB340 with a DSQC 377a (Conveyor Tracking) in queue tracking mode. The question is if it is necesary to use the instruction WaitWobj or if it enough if I use the signal c1NewObjStrobe (DI: new position from the encoder node to enter the job queue).

Thanks!!:smile:

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<div class="post-metadata">

**Author:** ![system](https://dub1.discourse-cdn.com/flex005/user_avatar/tech-community.robotics.abb.com/system/32/6_2.png) [@system](https://tech-community.robotics.abb.com/u/system)\
**Post date:** [May 23, 2008, 2:45pm UTC](https://tech-community.robotics.abb.com/t/conveyor-queue-tracking-mode/1872/2 "2008-05-23T14:45:13Z")

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Anyone knows? Where can I find a complet example of using queue tracking mode? I don’t understand what to do with c1CntFromEnc and c1CntToEnc!! :grinning:

Thanks in advance!!!