The parameter is a required sensor property. The sensors in the system work mainly on the basis of the data sent in the parameters.
Parameters can have different names which are set in the hardware configuration, for example, param199, param240, TEMP, pwr_int, gsm, can6, and so on. As a rule, you can find out what parameters are used and what they are responsible for in the hardware specification. Also, you can see the available parameters in a separate column of the table with the data messages received from the unit.
When adding or editing a sensor, you should select its parameter in the drop-down list or enter the parameter name manually. You can use the same parameter for any number of sensors.
Virtual parameters are set in the system by default and are suitable for almost any type of equipment.
UNIX time of the message
time of the message registration on the server
number of satellites
speed of movement
direction of movement
height above sea level
Input and output parameters
This group includes parameters of analog inputs and digital inputs and outputs.
Analog input. N stands for the input number. For example, the adc8 parameter sends the values of the eighth analog input.
Digital input. N stands for the input number.
The sum of the values of all digital inputs.
Digital output. N stands for the output number.
The sum of the values of all digital outputs.
Let's say, a message with the parameter I/O = 10/0 was sent from a place where the ignition was on. To determine the bit number (in this case, the input), you should enter the received value, that is, 10, in the calculator in hexadecimal mode (HEX), and then switch to binary mode (BIN). In the given example, the resulting binary number is 10000. Now you should determine the position of number 1 counting from the end. In our case, number 1 is the fifth from the end, which means that the ignition sensor is connected to the fifth port. Therefore, the parameter of the ignition sensor should be in5 (digital input 5).
If the device ports are numbered from zero, and not from one, then the N value in the inN and outN parameters is one more than the real port number.
The constant parameter is formatted as constN, where N stands for any number. Based on this parameter, you can create a virtual sensor which always sends the N value.
You can use sensors with constant parameters in charts to indicate critical points, in expression parameters, and as validation sensors for other virtual sensors.
The data received in parameters is usually numeric, but in some cases, the device can send text in parameters. This can be the name of a status (business/private), state (free/busy, on/off), the time that has passed since an event, and so on.
Text data can be displayed:
- in the additional unit information;
- on the Messages tab;
- in the Track player tool;
- in the Hittest tool;
- in the Formatted value column of the Sensor tracing table.
Text data is displayed on the screen in the format in which it was received, therefore, it is not necessary to configure the calculation table for sensors with text parameters.