Visual scope for coffee roasters
Creating Virtual Devices (V 0.5.0)
A virtual device uses the output of other real devices, so it does not need to physically exists (virtual). An example is a device to plot ET-BT to show how they are closing. The output of devices (curves) are symbolically referred as a Ynumber (capital Y followed by a number 1-99).
- Y1 = ET
- Y2 = BT
- Y3 = Extra device 1 curve 1
- Y4 = Extra device 1 curve 2
This tutorial assumes that you already have an ETBT working device. For example, if you click the button [ON], you can see the two temperatures of the device on the screen. That means your ETBT device is working.
Steps to create a Virtual Device
- Click on Conf/device…
- Click on the tab Extra dev.
- Press the button Add (to add an extra device)
- In the Device Type box, select the +Virtual device (don’t select device None)
- In the Y(x)1 box, enter a mathematical expression of Ys. For example enter Y1+Y2 (that would equal ET+BT). You could also enter Y1-Y2 but at room temperature may be zero and you may not see the curve.
- In the Y(x)2 box, enter something like 300 (or any mathematical expression with Ys but try to make the result withing the range of the display otherwise you won’t see it, and then you’ll think it does not work)
- Press OK to save the changes (now the serial conf dialog pops open).
- Press OK to save the serial configuration
Now you can press the button [ON] and 4 curves should appear (Each device is 2 curves). In this example the third plot is ET-BT and shows the values closing in on each other.
Don’t confuse the Extra devices with the plotter in the Extras.
Tags: Virtual Devices