Set up SoftPLS

Here's how to do it

1. Go to Settings and select Apps.

2. Click Add Application.

3. Enter a name and, if desired, a description.

4. Select a gateway.

5. Specify the execution frequency in milliseconds.

6. Select the data points the application will read from and/or write to.

7. Write the logic in JavaScript.

8. Save the application.

Read and write data points

You read data points from the `datapoints` array. For example, `datapoints[0]` reads the value of the first data point. You write to data points using `write()`.

Reading data points:

const value = datapoints[0];

Writing to data points:

write(0, true);

Example

if (datapoints[0] > 10) {
 write(0, true);
}

This logic writes `true` to data point 0 if the value is greater than 10.

Writing to the system log

You can write to the gateway’s system log using `utils.log_info()` and `utils.log_error()`. SoftPLS also has a `memory` object that can be used to store data between cycles. The data is stored on the gateway’s hard drive up to every ten minutes.

utils.log_info('Dette er en informasjonsmelding'); 
utils.log_error('Dette er en feilmelding');

Storing Temporary Values

SoftPLS provides access to a memory object for storing data between cycles. Data is saved to the gateway’s hard drive up to every 10 minutes.

memory.lastExec = new Date().getTime(); 
memory.counter = memory.counter ? memory.counter + 1 : 1;

Important to know

• SoftPLS supports a maximum of 100 data points per application.

• At least one data point must be read or written.

• Data points without data return `null`.

• The functions `log_info()`, `log_error()`, and `write()` should be used with caution to avoid unnecessary load on the system log and fieldbus.