UDS-SQL Monitored data for the UDS/SQL database system

The UDS-SQL monitoring program supplies monitored data of the UDS/SQL database system. See also the UDS/SQL “Database Operation” manual [15].

The monitoring program can only collect data which has been transferred to SM2 by a UDS monitor instance. Data transfer is initiated either by means of the MEDIUM=S,n statement when the UDS monitor is started or by means of the INFORM-PROGRAM MSG='ADD MEDIUM=S,n' command during operation. It can be terminated again using the INFORM-PROGRAM MSG='FINISH MEDIUM=S' command.

The interval at which the UDS monitors supplies the data to SM2 is defined in seconds (5 <= n <= 999) with n. This should be considerably lower than the monitoring cycle set in SM2 so that data can be transferred several times within an SM2 monitoring cycle.

The monitored data is supplied by UDS/SQL asynchronously to openSM2 and applies for one or more cycles which are defined by UDS/SQL and need not match the SM2 cycle exactly. Here differences can exist in the duration of the cycles, and time displacements can also exist between the UDS/SQL and SM2 cycles.

The duration of one or more UDS/SQL cycles is used to standardize the monitored data to one second. The data is therefore exact, but it only matches the SM2 cycle to a certain degree.