Hi @Benglin, I'm sorry that I don't quite get your point.

Referring to your suggested code `new string[] { "0", "0", "0" }`, do you mean storing the default values as attributes inside the PortInfo element like this?
```
<PortInfo index="0" default="True" value="0" />
<PortInfo index="1" default="True" value="0" />
<PortInfo index="2" default="True" value="0" />
```
But I observe that the default values are not stored in the DYN file. I guess that default values are only evaluated during runtime.

Please tell me more about what you have been thinking on this.