MQTT JSON Schema A Driver Guide - Minimum Configuration (Points Used on MQTT JSON Schema A Device Items)

Minimum Configuration

This topic relates to points on the MQTT JSON Schema A driver.

When you add an item to the database, various properties on the item's configuration Form are assigned a value automatically. These default values are assigned on creation of the database item, to help reduce the amount of manual configuration that is required. As such, you only need configure a subset of the properties that exist on an item's configuration Form. Typically, the properties you have to configure include:

Those properties that require a value, but for which the property field is blank
Those properties for which the value needs to differ from the default.

For a point on this driver to be capable of functioning in Geo SCADA Expert, as a minimum you have to specify these properties on the point's configuration Form (the properties are on the <Point Type> tab unless stated otherwise):

The Device to which the point is attached
The Tag Name of the item of data that the point represents.

If you want to store the point data historically, you have to:

Enable and configure the properties on the Historic tab, to enable Geo SCADA Expert to store the data historically in the server database.

Configure the properties in the Logged Data section of the <Point Type> tab, to specify the type of data that Geo SCADA Expert is to store historically for the point.

Also ensure that the the database items on which the point depends are In Service, and have saved, valid configuration. This will produce a point that is capable of functioning using the default configuration settings.