Hello,
Here’s my problem:
With the Modbus driver, negative values are implemented as 65536.
The problem arose because I’m logging the temperature of my freezer (-21°C), which is a permanently negative temperature. So, in Grafana, I performed an operation of -65536, and that worked.
Now, I’m logging the values from my weather station, so the outside temperature and dew point have both negative and positive values. My previous rule no longer works.
My solution:
Perform the following operation directly in OpenHistorian: IF value > 6000 Then value - 65536 Else value = value.
So, I created:
As you can see, it’s not working.
Thank you for your help.