run two loop simultaneously but time doubled

[yonghua.du]

Hi guys,

I am try to read two ion chamber simultaneously. Read IC0 and Read IC1 have one while loop each.

These two subvi can run simultaneously but the time cost still doubled.

Why?

Thanks a lot!

[crossrulz]

How are you communicating to your chambers?  It is likely the communication API cannot be ran simultaneously.  Therefore one has to wait for the other to complete.

[yonghua.du]

I use RS232 to read there two chambers. (Com1 & Com2)

[gaving]

yeah, your COM vis may need to be marked "re-entrant"...

[yonghua.du]

I tried. It didnt work

[yonghua.du · Accepted solution]

Hi guys,

Thanks for your response.

I found the issue. I put the delay between write and read COM. See the following figure. The timer were put in IC101 Resp.vi. After I moved it out, my code can work well.It's work well