Logging a Single Data Record Upon an Event Signal
When you check the "Log on Event Name" box in Sixlog’s Capture Parameters window, the station will log a single data record each time the datalogging event signal (called event_signal in Example 1 below) goes from FALSE to TRUE. This feature uses the output from a SxTRIG function in an ISaGRAF program (see Example 1 below) to command Sixlog to store the data record. The r_trig (rising edge detection) block in Example 1 assures that the rising edge of the event_signal input is what will cause the SxTrig block to signal the station to log a data record.
As shown in the window example below, check the "Log on Event Name" checkbox and enter the name of the SxTRIG output (called Trigger_1 in the example window below). Use this same name within the SxTrig function in the ISaGRAF program. (See Example 1 below.)
Logging Continuously Upon an Event Signal
The ISaGRAF program and Sixlog configuration can be modified so Sixlog will log continuously once the log_start signal goes TRUE, even momentarily. In the configuration window (see above), check the "Log/Stop Control" box instead of the "Log on Event Name" box. In the field next to the "Log/Stop Control" checkbox, enter the name of the latching coil (called log_latch in example 2 below). The log_latch coil will be held TRUE until the log_stop input is engaged.
