Execute Calculations with This Formula on Ursalink Cloud

This article explains how and when to use a formula on Ursalink Cloud formula setting to execute calculations.

Download PDF: Execute Simple Calculations with This Formula on Ursalink Cloud

Introduction

Simply, a variable is any raw data within a channel in Ursalink Cloud. The final value is a variable that results from the standard-based computation of other variables within Ursalink Cloud.

This function is very useful to extend your application’s functionality, i.e if you develop a Soil Temperature and Moisture Sensor that reads the register value, then simple calculations are needed for the register value to get the accurate value in the end. Take soil temperature and moisture sensor in this kit as an example, it can calculate and convert temperature and humidity based on the following formulas:
Soil Temperature = x/10
Soil Humidity = x/100-20

The Soil Temperature and Moisture Sensor are key measure factors in indicating soil temperature and water content.

Soil Moisture Measure Range	0 to 100%, ±2% (0% to 50%, 25°C)
Soil Temperature Measure Range	-20 to 80°C, ±1°C (25°C)
Response Time	＜1s
Power Supply	DC 12 to 24V
Power Consumption	0.6W DC 12V
Output	RS485
Housing Material	ABS
Size	133*40mm
Probe Length	60 mm
Cable Length	3 meters
Ingress Protection	IP68

Create a Channel with Toolbox

execute-calculations

Item	Description	Default
Execution Interval (ms)	The execution interval between each command. Range: 10-1000. The default value is 50.	50
Max Resp Time (ms)	Set the maximum response time that the Ursalink UC1152 waits for the response to the command. If the device does not get a response after the maximum response time, it’s determined that the command has timed out. Range: 10-1000. The default value is 500.	500
Max Retry Times	Set the maximum retry times after it fails to read. Range: 0-5. The default value is 3.	3
Channel ID	Assign the channel for the slave device. 8 channels selectable.	Null
Name	Set the name to identify the remote channel. It cannot be blank.	Null
Slave ID	Set Modbus slave ID.	Null
Address	The starting address for reading.	Null
Quantity	Set the number of digits to be read from the starting address.	Null
Type	Read command. Options are “Coil”, “Discrete”, “Holding Register (INT16)”, “Input Register (INT16)”, “Holding Register (INT32)” and “Holding Register (Float)”.	Holding Register (INT16)
Sign	To identify whether this channel is signed. Default: Unsigned.	Null
Decimal Place	Used to indicate a decimal point in channel value. For example, the channel value is 1234, and Decimal Place is set as 2, then the actual value is 12.34.	Null