Using merge block with bus signal inputs.

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Benjamin Wang
Benjamin Wang 2012-11-16
Hi, guys
I am really confused with the 'If/else -> Action -> Merge' pattern in Simulink, especially when working with Bus Signals.
Say, I created a bus with two members, 'a' and 'b', both are scalars with initial value of 0. I want to repeatedly increase 'a' by 1 when it is less than 5, and otherwise do nothing.
I know I could have merged the member 'a' rather than the whole bus signal. It's just an over-simplified version of my real work, which does lots of stuff in the 'If Action Subsystem'.
I was gonna upload a .mdl file to demonstrate my question more clear. Then I found that there is no way to do that here. So, for short, my question is: how to merge bus signals?
Thanks!
Ben

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采纳的回答

Kaustubha Govind
Kaustubha Govind 2012-11-16
The Merge block does support bus signals. Look for the section called Bus Support in the documentation.
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Benjamin Wang
Benjamin Wang 2012-11-19
Thank you Kaustubha. Sorry, I'm late.
I knew that the Merge block supports bus signals. But I couldn't make it work in a straight forward way. Then I found out that I had to put a 'Signal Conversion' block in each 'If Action Subsystem', with its 'Output' parameter setting to 'Bus Copy'. Now my model works fine.

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