Virtual Mathematics Sensor
The “Mathematics Sensor” is one of the virtual sensors of the LAN‑based Didactum IT monitoring devices.
The following monitoring devices support this virtual sensor:
- Didactum Monitoring System 50
- Didactum Monitoring System 100 II / III / IV and the DC (48 V) DC‑current models
- Didactum Monitoring System 500 II and its DC (48 V) DC‑current models
As the short form “Math Sensor” already suggests, this sensor is used for mathematical functions. The virtual sensor allows you to calculate a value based on (measured) data from any sensor. Please note that the “Math” sensor is available only from Didactum firmware 2.8.1 b123 (or newer). The virtual “Math Sensor” can be found in the system tree after clicking the “+” symbol in the top‑right corner. The mathematical functions are entered under the “Additional Settings” tab.
The “Mathematics Sensor” menu tab offers the following input fields:
| # | Field | Description |
|---|---|---|
| 1 | Function | Function of the form f(x). To calculate the indirect sensor value, you can use any valid expression including “(”, “)”, as well as:
Example: “0.1*x+0.5”. |
| 2 | Polling period | Defines the update interval for the sensor value. |
| 3 | Add variable | Allows adding a new variable (maximum 26 variables). |
| 4 | Variable | Specifies a unique variable name from A to Z. Note: variable names may not be duplicated. |
| 5 | Corresponding sensor | Specifies the sensor whose value is used in the calculations. |
Note from the technical editorial team: If one of the sensors used as a variable source becomes unavailable, the virtual “Mathematics Sensor” will be in the “not connected” state.
As of: 10/2019