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numbers located on the diagram are associated to the following three notes respectively:
1.
While CaptureTriggered is active, a rising edge on CaptureActivate will be ignored. The capture object can not
activate again until it has been reset.
2.
When CaptureEnable is deactivated, CaptureTriggered automatically deactivates because the capture object is
automatically reset. The captured data is retained until the capture component is re-enabled and CaptureActivate is
activated.
3.
CaptureActivate has no effect while the capture component is not enabled.
Sources That Can Accurately Capture Data
Only a select few sources can accurately capture data. The reason that only certain signals can accurately capture data is because
they are wired directly to the EZMotion FPGA or the signal is generated internally by the processor and can be activated in the
FPGA. Signals that are not wired to the FPGA or sent to the FPGA can be used to capture data, but it will only be accurate to the
Trajectory Update Rate. This means that the capture will only occur the next time the signal is updated and not when it actually
activates.
Sources that CAN accurately capture data:
•
EZMotion Inputs
•
Motor Encoder Marker Channel
•
Index.#.CommandComplete
•
Jog.#.CommandComplete
•
Index.#.AtVelocity
•
Jog.0.AtVelocity
•
PLS.#.Status
All other Sources are only accurate to the Trajectory Update Rate.
Assignments that Automatically Use Position Capture
The sources listed above automatically capture data each time they activate even when a capture object is not configured. If any of
these Sources are assigned to a destination, the captured data may be used by the destination function.
The Destinations that can use the automatically captured data are as follows:
•
Index.#.Initiate
•
Index.#.SensorTrigger
The automatically captured data is not available to the user like it is when a capture object is used. The processor takes care of
resetting the automatic capture internally.
Index.#.Initiate - When one of the Sources listed above (Sources That Accurately Capture Data) is assigned to an Index Initiate, the
captured information is automatically applied to the index starting point. This offers extremely high accuracy for initiation of motion,
which is beneficial especially in synchronized applications.
Index.#.SensorTrigger - The sensor trigger destination used in registration indexes can use captured data to accurately calculate
the ending position of the index based on the Registration Offset parameter. The Offset distance is added to the captured position to
let the accurate stopping position for the registration index.
8.5.3
Queues View
The Queues view allows the user to configure the necessary parameters for the Queue object to function properly. Figure 99 shows
an example of the Queue view.
98
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EZMotion User/Programming Guide
Revision: A8
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