View - PmaFolderThe "PanelTest" test panel is used for displaying received data. Here it is possible to use the configurators in order to put together requested method and command parameter. The "PanelTrend" panel allows rendering graphic chart of data in defined time-range.
The PmaFolder object has methods RequestEwons, RequestEwon, RequestData and RequestSyncdata that are used to initiate the communication. Each of these methods call the Add method of the PmaSequencer object together with corresponding parameters. It triggers the onStep event of the PmaSequencer object where the HttpRequest object executes the communication with the service. The received data is then processed by methods ReplyEwons, ReplyEwon, ReplyData and ReplySyncdata that must be modified accordingly.
Cfg - PmaFolderSubobjects in this folder can be used to select values that will be read and saved locally into a trend database table. The CfgTrend panel is used for data selection and configuration. Once the configuration is saved, new file named EwonCfgTrend.txt is created in the Cfg folder of the application. The content of such file is necessary for correct functionality of subobjects located in the Trend folder. These subobjects are responsible for saving selected values into trends.
Trend - PmaFolderSubobjects in this folder are responsible for communication and saving selected values into trends. The configuration file EwonCfgTrend.txt is necessary for their correct functionality. The file contains JSon data created by the CfgTrend panel. If increasing the number of trended values is needed, it can be done by opening the application in the development environment and copying the TrendVar1 object in the Trend folder.
Once the communication is launched for the first time the application starts reading all historical data (stored in the cloud) of variables defined in the configuration file. The order of variables is respected. The data is read and stored continuously from the oldes to the newest. The application reads batches of 200 records every 0.5 seconds (after the previous batch is processed). Once one variable is fully read then another follows. This process may take significant ammount of time based on the total ammount of data to be read. Once all the data is read and saved locally following communication is planned for the time defined in the DataCfg object in the Period variable. This value defines for how many seconds the system waits (after the previous communication ends) before the next reading of data from the cloud is initiated.
|The name of created object||Name of the object created in the tree of Pma objects. The maximum Pma object name length is 31 characters. This is a system name, so it must contain only alphanumeric and must not contain any diacritics, empty string, spaces and the first character must not be a number.|
|Service account identifier||assigned identification code of service account|
|Account name||User account name|
|User||Account login name|
|Password||Account login password|
|Object scripting language||Application object scripting language|
0 - vbscript
|Demonstration of communication and data processing||Creates View folder for demonstration and testing of communication and data processing|
|Save selected values into trends||Creates folders Trend and Cfg for configuration and trending of selected values|
|Number of trended values||Planned number of trended values|
|Data reading time period||Time period (in seconds) of repeated data reading|