Emerson Epsilon EP Drive 400518-01 Manual de instalación descargar pdf (Pagina 75)

Setting Up Parameters

Capture.#.CapturedPositionCommand

The command position, in user units, at the time when CaptureTriggered activated.

Capture.#.CapturedPositionFeedback

The feedback position, in user units, at the time when CaptureTriggered activated.

Capture.#.CapturedMasterPostion

The master axis feedback position, in master axis distance units, at the time when CaptureTriggered activated.

The captured data remains in these parameters until the capture component is reset and CaptureActivate is activated. 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.

Figure 58: Capture Timing Diagram

Figure 58 is a timing diagram that shows how the different capture related sources and destinations function. The three

numbers located on the diagram are associated to the following three notes respectively:

1) The CaptureActivate has no effect when the CaptureTriggered is active. CaptureActivate is ignored until the capture

component has been reset.

2) When CaptureEnable is deactivated, CaptureTriggered is deactivated, and the capture component 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.

Assignments that Automatically Use Position Capture

Certain assignments (Sources or Destinations) automatically generate position capture data internally without using the

capture component. This data is used by the FM-3/4 module, but is not directly available to the user like the capture

component data. Following is a list of assignments that automatically generate or use captured data.

Sources that generate capture data

Module Inputs – The FM-3/4 Module Inputs (not base drive inputs) are constantly monitored by the processor, and when

activated will automatically capture related data. The processor controls all resetting requirements. The capture only occurs

on the rising edge of an input. When the input is activated, the captured data will automatically be passed to the destination

that it is assigned to. The destination may then use the captured data to accurately initiate motion (if it is a motion-related

destination).

Motor Encoder Marker – The rising edge of the motor encoder marker pulse will automatically capture data. This will

allow the user to accurately initiate motion on the rising edge of the motor encoder marker pulse. The falling edge of the

marker pulse does not capture data.

Master Encoder Marker – The rising edge of the master encoder marker pulse will automatically capture data. This allows

the user to accurately initiate motion on the rising edge of the master encoder marker pulse. The falling edge of the marker

pulse does not capture data.

Index/Jog Command Complete – Activation of the command complete signal at the end of indexes and jogs will

automatically capture data. A subsequent index, jog, or dwell can then use the captured data to start itself extremely accurate

at the end of the previous motion.

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Emerson Epsilon EP Drive 400518-01 Manual de instalación Pagina 75