Rockwell Automation 5370-CVIM2 Module - Manual (Page 483)

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 400
mSec
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