Rockwell Automation 5370 Color CVIM Communications Manual - Manual (Page 27)

Chapter 3
Using Local I/O
3–7
To make proper use of the signal data available to the output lines, 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 inspection cycles with your production equipment.
Timing charts (Figures 3.2, 3.3, and 3.4) show the timing relationships in
various circumstances.
Figure 3.2 shows the relationship between the trigger leading edge and the
Strobe, Data Valid, and Results signals, where the last three appear as pulses
whose duration you determine during configuration.
Figure 3.2
Timing Diagram — Pulsed I/O
Strobe
≈
2ms
You can select a
pulse width of 1
to 2000ms
Min. trigger ≈ 2ms*
DATA VALID will al-
ways pulse high
when inspection
processing is com-
plete.
MODULE
BUSY
** ***
** ***
** ***
Trigger
pulse #1
Trigger
pulse #2
Trigger
(Input)
STROBE
DATA
VALID
RESULTS
MASTER
RANGE
RESULTS signal will
pulse high if an anal-
ysis tool range limit
is exceeded.
MASTER RANGE
signal will pulse
high if any tool de-
tects a failure con-
dition.
Max. lag ≈ 1ms
* As seen by the Color CVIM when the trigger is directly connected through the JMB
board, and not provided by a host device.
** Minimum acquisition time: 17ms for 256x256 and 512x256 Res; 34 ms for 512x512 res.
*** Analysis time (variable).
Using Output Signal
Timing Data