# Open loop vs Direct Output Halts

**URL:** <https://forum.deltamotion.com/t/open-loop-vs-direct-output-halts/458>\
**Category:** RMCTools\
**Created:** [March 19, 2018, 8:39pm UTC](https://forum.deltamotion.com/t/open-loop-vs-direct-output-halts/458 "2018-03-19T20:39:50Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![PaulP](https://forum.deltamotion.com/letter_avatar_proxy/v4/letter/p/a3d4f5/32.png) [@PaulP](https://forum.deltamotion.com/u/PaulP)\
**Post date:** [March 19, 2018, 8:39pm UTC](https://forum.deltamotion.com/t/open-loop-vs-direct-output-halts/458/1 "2018-03-19T20:39:50Z")

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I have read the help manual a few times, and I am still not totally sure on when to use Direct Output vs Open Loop halt.

Would a rotating system put into open loop halt apply a command in the opposite direction/polarity of when the halt was issued to stop motion, vs the command just ramping to 0v with the direct output halt?

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<div class="post-metadata">

**Author:** ![Jacob\_Paso](https://forum.deltamotion.com/letter_avatar_proxy/v4/letter/j/439d5e/32.png) [@Jacob\_Paso](https://forum.deltamotion.com/u/Jacob_Paso)\
**Post date:** [March 23, 2018, 12:02pm UTC](https://forum.deltamotion.com/t/open-loop-vs-direct-output-halts/458/2 "2018-03-23T12:02:17Z")

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Direct Output Halt and Open Loop Halt are almost the same. They will both ramp the Control Output down to zero. The Direct Output Halt will also turn off the Enable Output. Neither will apply an output in the opposite direction when stopping.