Stop Conditions Page

Use this page of the Recording Options tab to specify which conditions must be met for data logging to stop.

This page includes the following components:

• Stop condition list—Lists the source, type, and status of each stop condition you configure. Use the up and down arrows to change the order of the stop conditions.
  • Source—Indicates the source of the stop condition. This field displays the Condition type you specify or, if you set Condition type to Signal trigger, the name of the Signal you specify.
  • Conditions—Indicates the behavior of the Source that triggers a stop condition.
  • Met?—Indicates whether the stop condition is met.
• Add—Adds a stop condition to the Stop condition list.
• Remove—Removes the selected stop condition from the Stop condition list.
• Condition logic—Specifies the logic LabVIEW SignalExpress uses to process the stop conditions. You must add more than one stop condition to the Stop condition list to display this pull-down menu. You can select from the following options:
  • AND—Specifies to stop logging only when all stop conditions are met.
  • OR—Specifies to stop logging when any stop condition is met.
  • Sequence—Specifies to stop logging when all stop conditions are met in the order in which they appear in the Stop condition list. Except for the first stop condition, LabVIEW SignalExpress ignores stop conditions until the preceding stop condition(s) is met. Use the up and down arrows next to the Stop condition list to change the order of stop conditions.
• Condition type—Specifies the type of the selected stop condition. You can select from the following condition types:
  • Duration—Specifies to stop logging after an amount of time you specify.
  • Date/Time—Specifies to stop logging at the date and time you specify.
  • Signal trigger—Specifies to stop logging when a trigger occurs on the Signal you specify. Use the Trigger type field to configure a trigger.
  • Software trigger—Specifies to stop logging when the Software trigger you specify occurs.
• Duration (s)—[Condition type: Duration] Specifies the number of seconds to log data before the stop condition is met.
• Time—[Condition type: Date/Time] Specifies the date and time to stop logging.
• Signal—[Condition type: Signal trigger] Specifies the signal to use to trigger the stop condition.
• Trigger type—[Condition type: Signal trigger] Specifies the behavior of the Signal that triggers LabVIEW SignalExpress to stop logging. You can select from the following options:
  • Rising slope—(Default) Stops logging when the signal crosses the value you specify in the Trigger value field with a positive slope.
  • Falling slope—Stops logging when the signal crosses the value you specify in the Trigger value field with a negative slope.
  • Entering window—Stops logging when the signal enters the window between the values you specify in the Higher value and Lower value fields.
  • Leaving window—Stops logging when the signal leaves the window between the values you specify in the Higher value and Lower value fields.
• Trigger value—[Trigger type: Rising slope, Falling slope] Specifies the value the signal must cross to stop logging.
• Hysteresis—[Trigger type: Rising slope, Falling slope] Specifies the amount above or below the Trigger value through which the signal must pass before LabVIEW SignalExpress stops logging. You can use Hysteresis to prevent noise from causing a false stop condition. For a Rising slope condition, the signal must pass below Trigger value – Hysteresis before LabVIEW SignalExpress stops logging. For a Falling slope condition, the signal must pass above Trigger value + Hysteresis before LabVIEW SignalExpress stops logging.
• Higher value—[Trigger type: Entering window, Leaving window] Specifies the high limit of the range in which the signal must enter or leave the window to stop logging.
• Lower value—[Trigger type: Entering window, Leaving window] Specifies the low limit of the range in which the signal must enter or leave the window to stop logging.
• Count—[Condition type: Signal trigger] Specifies the number of times the Signal must meet the stop condition before LabVIEW SignalExpress stops logging.
• Software trigger—[Condition type: Software trigger] Specifies a software trigger to use for the stop condition. You can specify up to three separate software triggers. When you select a software trigger, a toolbar button with the trigger name appears. Click the toolbar button to trigger the stop condition.
• Advanced timing—Contains the following components:
  • Post-stop condition duration (s)—Specifies the number of seconds of data after the stop condition is met to include in the data log.
  • Stop condition holdoff (s)—Specifies a time in seconds to wait after a start condition occurs before acknowledging stop conditions.