Rockwell-automation 5370-CVIM2 Module User Manual download pdf (Page 483)

100

101

Chapter 9

Discrete I/O Assignments

9–20

To make proper use of the output signals, you must first understand the

timing relationships that exist between the trigger input signal (which starts

each inspection cycle) and the output signals.

Knowing these signal timing relationships enables you to accurately

synchronize the CVIM2 system’s inspection cycles with your process

equipment. The timing charts in Figure 9.13, Figure 9.14 (page 9–21), and

Figure 9.15 (page 9–22) contain examples of these signal timing

relationships in various circumstances.

Figure 9.13 shows the relationship between the trigger leading edge and the

strobe, data valid, fail, and tool fail signals, where the last three appear as

pulses whose duration you determine in the appropriate Time box in the

Discrete I/O Edit panel.

Figure 9.13 Example: Timing Relationships for Pulsed Outputs

*Acquisition time: 34 – 51ms, for two–field resolution; 17 – 34ms for one–field resolutions.

** Analysis time.

You can select

a pulse width

of 1 to 9999ms

MODULE

READY

DATA

VALID

***

You can select

a pulse width

of 1 to 9999ms

Typically 200 to 400mSec

STROBE

TRIGGER

(Input)

Trigger

pulse #1

Trigger

pulse #2

PULSED I/O TIMING

DATA VALID will always pulse high

when inspection processing is complete.

***

FAIL will pulse high if any tool’s

fail range limit is exceeded

***

FAIL

TOOL

FAIL

TOOL FAIL will pulse high if a specific

tool’s fail range limit is exceeded

MODULE READY goes high when system is placed

online, and stays high until it is placed offline.

DATA VALID lags the inspection result by

300usec

Discrete I/O Signal

Timing Data

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Rockwell-automation 5370-CVIM2 Module User Manual Page 483

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