Rockwell Automation Publication 2198-UM004D-EN-P - December 2022 373
Chapter 12 Motion Control Applications
when this value is larger than zero, Bit 0 is ON. This state indicates that
the capture function is executing.
When the Capture function is executing, the
DI9CaptureRemainedCount (ID330, P5.038) parameter indicates the
remaining number of captures to be performed. Whenever a capture
cycle occurs, this value decrements by 1 until the value is 0. The zero value
indicates that the Capture function has completed.
• Choose to perform the Compare (CMP) function when the position is
captured.
This option performs a compare function after the capture has occurred.
• Choose a PR to execute when the capture is complete.
When the capture is completed, use the pull-down menu to choose a
specific PR# to execute.
• Choose the source of position for your capture function.
Here you can choose the position feedback source that is used for
capturing. You can also choose Capture Disable which is another way to
disable the capture function if your remaining count is still greater than
zero.
• Choose the trigger logic.
Choose whether the capture executes when a N.O. (Normally Open) or
N.C. (Normally Closed) condition occurs on DI9 (this condition is
thought of as rising edge, falling edge).
• Choose the time interval for retriggering the capture function.
This time interval avoids nuisance sensor trips typical in high-speed
applications. You can set the capture function only to occur once this
time has elapsed.
• Use DI9CaptureMaskRange (ID132, P1.020) if necessary.
To help prevent the same position data (or position data within a small
window) from being captured repeatedly, you can configure the drive to
avoid capturing multiple identical data sets by defining a masking range
for data capture. This range defines the pulses that must occur before
any new data is stored.
The logical evaluation considers DI9 to be configured as a N.O. input. When
this configuration is true, the logic behaves as shown. If DI9 is an N.C. input,
the logic levels are reversed.
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