# Dual Core Control of an on board Charger

**URL:** <https://forum.plexim.com/t/dual-core-control-of-an-on-board-charger/1528>\
**Category:** RT Box\
**Tags:** rt-box\
**Created:** [November 20, 2024, 6:19pm UTC](https://forum.plexim.com/t/dual-core-control-of-an-on-board-charger/1528 "2024-11-20T18:19:30Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Sachith](https://avatars.discourse-cdn.com/v4/letter/s/a3d4f5/32.png) [@Sachith](https://forum.plexim.com/u/Sachith)\
**Post date:** [November 20, 2024, 6:19pm UTC](https://forum.plexim.com/t/dual-core-control-of-an-on-board-charger/1528/1 "2024-11-20T18:19:30Z")

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Hello,  
The demo model provided for the dual-core control of an onboard Charger has some conversion between DAB and Inveter connection, as shown in the following figure.

 ![Conversion_2](https://europe1.discourse-cdn.com/flex006/uploads/plecs/original/2X/9/9ad0e2ca990c4ad04e21fee70eae550cb752ff6a.jpeg)

I am confused about how that develops. Can you please help me understand it or give me some resources to observe?

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**Author:** ![Bryan\_Lieblick](https://dub1.discourse-cdn.com/flex006/user_avatar/forum.plexim.com/bryan_lieblick/32/10_2.png) [@Bryan\_Lieblick](https://forum.plexim.com/u/Bryan_Lieblick)\
**Post date:** [November 25, 2024, 2:50pm UTC](https://forum.plexim.com/t/dual-core-control-of-an-on-board-charger/1528/2 "2024-11-25T14:50:01Z")

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See the “Distributed Realtime Simulation” section of the RT Box User Manual. From the Manual:

> Note that in an offline simulation a Delay block is necessary in at least one direction of communication to prevent algebraic loops.

This is also discussed in the [System Splitting for Distributed Real-Time Simulation](https://plexim.com/support/tutorials?body_value=1&field_tutorial_product_value=2#) tutorial on the Plexim tutorial page.