Overview: See Example Configurations in the on-line help A trigger is a mechanism that allows you to configure when the OPC Data Logger should begin or end logging or start a file span event. Triggers can be used together to create multiple logging behaviors in one process. The Data Logger contains several types of triggers. Each trigger is an identifier that signals when or under what condition events occur: Begin logging, End logging, or Launch file spanning event.  Every trigger type is capable of signaling each event type. The trigger types are Scheduled (at a given time), Recurring (repeating at a given interval), and Monitored Item (based on a value of a monitored tag). You can define one or multiple of any or all types of these in your project. Any or all types of triggers can be enabled for use simultaneously. Scheduled Triggers: A scheduled trigger allows you to specify a date and time to start or stop logging, enable or disable groups of items or to launch a file spanning event. Uses: Log end of shift of end of day report data Start a new log file at the end of a shift or day Log weekly data Log monthly data Schedule different groups of data to be logged at different time.