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All sensors include:
| 1 | Name | Name The name is given by the system automatically. You can change it to anything you want. |
| 3 | ID | System ID of the element. |
| 4 | Type | Example: temperature, humidity, vibration. |
| 5 | Class | Examples: analog, CAN, switch, discrete. |
| 6 | Hardware port | The external port number on the device panel to which the sensor is connected (if the sensor is external). |
All sensors have threshold controls:
On In the picture above, the "Current value" equals 41.0 and is represented by the small triangle. Currently, the triangle is green because it is situated in an the "Normal" range. Hence the sensor says that "Current state" is "Normal". This value is used by the system "Logic schemes" menu to notify the administrator or take action.
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If the hysteresis is set in a time, the sensor will transmit to a new state with a delay of the specified number of seconds in the corresponding field. The time counting will begin from the moment when the measured value value of the sensor has left the current range.
Each state has its own field. Which determines the time that the sensor value must continuously hold in order for the state to change to the specified.
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Let’s say that we have a temperature sensor. Let’s say that we have set up threshold values. We have set the value 25.5 °C to be a threshold value between Normal/Alarm states. If the temperature drops just below 25.5 °C You will have a “Normal” state. If the temperature goes just above 25.5 °C You will have a “Warning” state. Sometimes the temperature may stay at 25.5 °C and jump up and down by 0.1-0.3 °C. In this case, You will get too many notifications that the sensor is showing a Warning or Normal state. In this case, we need to use a Hysteresis. If the type “time” is chosen, the system will wait for a specified time before the State of the sensor is declared. If type “value” is used, unless the temperature drops by a larger amount than specified, the sensor state will not be declared. |
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Example: Using fuel tanks.
Each fuel tank has it's its own formula for volume vs height. Please see this useful resource for finding out such a formula.
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