Using output signal timing data (cont’d) – Rockwell Automation 5370 CVIM Communications Manual User Manual

Page 27

Chapter 3

Using Local I/O

3–8

Whenever these signals go high, they will go low again at the end of the
specified pulse duration (1 to 2000ms).

Note: The Local I/O Module Busy is high only during system configuration.

In Figure 3.4, the Data Valid, and Results signals appear as changes in signal
levels. This will occur if, during system configuration, you select a pulse
“duration” of 0 (zero) milliseconds. Data Valid will stay high until the
leading edge of the next valid trigger signal (Trigger Pulse #2). Results stay
in their current state until the leading edge of the next Trigger pulse, then
change depending upon the results.

Figure 3.4
Timing Diagram — Non–Pulsed I/O

DATA VALID will go high when inspection
processing is complete, and will go low with the
leading edge of the next valid trigger.

MODULE

BUSY

Trigger

pulse #1

Trigger

pulse #2

Trigger

(Input)

STROBE

DATA

VALID

RESULTS

RESULTS signal will go
high if an analysis tool
range limit is exceeded.

Minimum acquisition time: 17ms for 256x256 Res.; 34ms for 512x512 Res.

Analysis time.

* * *

Data Valid (and results) will be sent for a minimum of 15 msec when 0
pulse length is selected.

* *

Using Output Signal
Timing Data (cont’d)