ABB NETA-21, User Manual

Page: 84 / 196

84 Devices
7. Open the Triggers sub-panel.
In this panel you can adjust:
•
Time step (ms): sampling rate of the data logger in the device.
•
Trigger conditions: multiple choices depending on the monitored device.
•
Trigger variable (parameter selection), Trigger level and Trigger hysteresis , if
the selected trigger condition requires the values. For example, a limit check
requires that the parameter and trigger level limit are specified.
•
Pre-trigger count : number of the samples recorded in each data log before the
triggered event occurred.
Note: The number of available ranges and trigger options vary depending on the
monitored device. If the selected settings are not accepted by the monitored device
when you click the
Apply changes button, the UI restores the original settings from
the monitored device to the Triggers panel.
8. From the Time step spin box select the time interval (in milliseconds) between data
readings.
9. From the Trigger conditions list select what device conditions will trigger the data
logger to send in the collected data.
An additional parameter value set in
Trigger variable can be used to trigger the data
logger. Use the Trigger hysteresis spin box to set the signal value hysteresis.
10. In the Pre-trigger count spin box select the number of data entries that will predate
the trigger event.