Rockwell Automation WebPak CS Software Version 1.0 - Manual (Page 50)

8-6 WebPakCS Software V1.0
8.2.3 Setting Up the Trigger
Use the Trigger and Trigger delay/position group boxes in the Trace Signal Setup
dialog box to define a trigger that will begin a data acquisition. You do not need to set
up a trigger if you plan to use Auto or Manual to acquire traces. See section 8.3 for
more information.
To set up trigger, follow these steps:
Step 1. Choose a drive signal you want to use as a trigger from the Signal list box.
Step 2. Choose the trigger operation (if desired) that causes the trigger condition by
using the Operation list box. The available trigger operations are determined
by the drive type. Some examples of trigger operations are: less than, greater
than, and equal to.
Step 3. Choose a trigger level that is to be used by the trigger operation. The units
and normalization depend upon the trigger signal.
Step 4. Choose a trigger position or delay by selecting the appropriate option and
entering a value.
To: Choose:
specify how many samples are displayed in the trace before
and after the trigger.
For a trigger position of zero percent, the trigger is at the
beginning of the trace (all samples displayed were acquired
after the trigger). For a trigger position of 100%, the trigger is
at the end of the trace, a position of 50% is in the center, etc.
Position
specify the amount of time between the trigger and the
beginning of data acquisition.
The delay is measured in seconds.
Delay