This Driver only allows reading a single Tag, whose content is displayed only when there is data sent by a Callback. This data is stored on this Driver's internal memory (cache), as many times as it is sent to that Driver. This Tag is read by respecting its scan time and displays values from the last received Callback. If there is data in cache when reading this Tag, a list with N blocks is returned, where N is the number of data received from Callbacks. Otherwise, it returns an empty list.

Read-Only

The size of this Block Tag can be determined by the number of variables configured in the URL and payload templates. In the URL template, users must disregarded the %time-type variable and the data variable, if there is a declaration of a payload template. In the payload template, all configured variables become an Element of that Block Tag. This Block Tag is built in the order the variables are declared in the URL template, followed by the order the variables were declared in the payload template.

Example of reading a Block Tag