Zwave devices (which your switch is) have a set of “parameters” Which can take on different values. These parameters are designed by the company that manufactures the device, and are their way of letting their customers set different options for that device.
The parameter settings are stored in the device itself and control how it functions. If ramp rate is adjustable, you will make the adjustment by changing the values for some of the parameters, however the manufacturer has designed it.
So the first thing you need to find out is what parameters that device’s manufacturer lets you set and what the different values will be for each parameter.
So you will end up with information in pairs: a parameter number, and the value that represents the option you want. The process of changing the values for the parameters is called “configuration.“
In this case, the manufacturer has a page on their website that lists all the available parameters and values. They use two parameters to control the ramp rate: One for the number of steps from off to bright and one for the amount of time the light spends at each step before moving onto the next one.
For an in wall dimmer, this is controlled with parameters 7 through 12.
( just skip the part about association groups, that doesn’t have anything to do with what you are working with right now. You just need to find the parameters that control the ramp rate and then choose the values that will give you the end result you want. )
Read the examples on the manufacturer page and it should be clear:
So once you know the pair of codes that you want to put in, like
7:1 (parameter 7, value one)
8:1 (parameter 8, value one)
Then you can enter them in whatever DTH you are using.
Different DTHs may have slightly different formats for how you put it in, but they are all trying to do the same thing: save the parameter and the value that you want for that parameter in the switch so it will produce the behavior you want to see.