User guide

Configuring an Application www.controltechniques.com 59
7.3.11 Setup NVM View
This View allows the user to configure which parameters
are saved when power is cycled. If a parameter is not in
this list, the value of the parameter will revert back to the
value that was downloaded when power is cycled. If a
parameter is in the list, the value that was being used just
before power is cycled will be used when power is restored.
Figure 79: Setup NVM View
7.3.12 Capture View
The Capture View allows the user to configure the various
Capture object parameters. Figure 80 shows an example
of the Capture view.
Figure 80: Capture View
A detailed explanation of each of the Capture components
is below.
7.3.12.0.1 Capture Number
This parameter defines the number of Capture objects
available. Maximum is eight.
7.3.12.0.2 Name
You can assign a descriptive name to each capture,
making the configuration easier to follow. The length of the
text string is limited by the column width with a maximum
of 12 characters.
Simply double click on the Name field of any capture line,
enter the descriptive name and then enter, to assign a
name to it.
The following four parameters are the data that is acquired
by the position capture object. These parameters are
available to be used as variables in a program. The four
parameters can be accessed as follows:
Capture.#.CapturedTime - The time, in microseconds,
from a free-running 32-bit binary counter at which the
CaptureActivate signal activated.
Capture.#.CapturedPositionCommand - The command
position, in user units, at the time when the
CaptureActivate signal activated.
Capture.#.CapturedPositionFeedback - The feedback
position, in user units, at the time when the
CaptureActivate signal activated.
Capture.#.CapturedMasterPostion - The master axis
feedback position, in master axis distance units, at the time
when the CaptureActivate signal activated.
The captured data remains in these parameters until the
capture component is reset and CaptureActivate is
activated the next time. When the capture component is
reset and CaptureActivate is activated, the data related to
the previous capture will be over-written by the most recent
capture data.
Capture Sources and Destinations
Figure 81 shows a block diagram of the Capture object
Figure 81: Capture Object
Sources
CaptureTriggered - The CaptureTriggered signal is
read-only and indicates that the Capture component was
activated, and that data has been captured.
CaptureTriggered will activate on the leading edge of
C
aptureEnable
C
aptureActivate
C
aptureReset
CaptureTriggere
d
Time
Command Position
Feedback Position
Master Position
Captured Data