AKD User Guide | REC Parameters and Commands
REC.TRIGPOS
General Information
Type R/W Parameter
Description Sets the trigger position in the recording buffer.
Units %
Range 1 to 100%
Default Value 10%
Data Type Integer
See Also REC.TRIG, REC.NUMPOINTS
Start Version M_01-00-00-000
Fieldbus Index/Subindex Object Start Version
Modbus 722 M_01-03-00-000
Description
REC.TRIGPOS sets thetrigger positionin therecording buffer. The recording buffer size is defined by REC.NU-
MPOINTS. The input value is a percentageof thebuffer (that is, avalue of 25 means saving 25% of thebuffer data
beforethe triggeroccurs and75% afterit occurs). This parameteris only used whenREC.TRIGTYPE = 2 or 3.
Trigger Position
Trigger position (REC.TRIGPOS) allows you to collect data that occurs before the trigger occurs. In some
instances, you may want to see the conditions prior to the trigger. Trigger position lets you control how much sig-
nal is collected before the trigger condition occurred .
Trigger position is specified in units of percent (%). If you specify a trigger position of x% , then x% of the data is
before 0 ms in the data time and 100-x% (the rest of the data) is at or greater than 0 ms. In the figure below, the
trigger position is set to 25% (REC.TRIGPOS 25).
In the WorkBenchscope, the0 timepoint is clear. Whencollecting thedata using REC.RETRIEVE orsimilar com-
mands, the timeis not returned, so some cautionshould beused whenthe triggerpoint is important to understand.
Related Topics
578 Kollmorgen | December 2010
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