Rockwell Automation 5370-CVIM2 Module - Manual (Page 66)

5 Chapter Chapter 3
Image Acquisition Parameters
3–27
•
Bank Switch Command Input –– This field selects the bank switch
command input assignment on either the
Module I/O or the System I/O .
It is active only when the “ On Command ” bank switch mode is selected.
•
Bank Switch State Output –– This field selects the bank switch
command output source (from either the
Module I/O or the System I/O )
when the bank switch mode is “ On Command .”
Default Camera Type
The CVIM2 system uses the default camera type as the basis for determining
the horizontal and vertical frequencies that regulate the “squareness” of the
pixels in the camera image. Thus, for example, when the 2801–YC camera is
selected as the default camera type, images from a 2801–YC camera will
contain the squarest possible pixels, while images from other cameras (such
as the 2801–YD) will not be square.
For applications using more than one camera type, the default camera type
should be selected for the camera(s) whose inspection tasks (such as rotation
finder) are the most sensitive to pixel squareness.
Horizontal Reference Source
For most applications, the CVIM2 system can supply horizontal timing or
“sync” signals for all cameras on the basis of the horizontal reference for the
default camera type. For some applications, however, an external horizontal
timing source may be required. Here are two such application situations
requiring an external horizontal reference:
•
A non–standard camera is used, and it generates its own horizontal timing
signals and cannot be driven from the CVIM2 system.
•
A “genlock” timing device is used to synchronize all CVIM2 systems and
cameras when multiple systems and/or cameras are used.
In either of these situations, “ External, Cam.4 In ” should be selected in the
H.Reference box. In addition, a cable from the external synchronizing
source must be attached to the camera #4 input on the CVIM2 front panel.
NOTE: The Allen–Bradley Company does not supply cables for connecting
external timing sources to the camera connectors on the CVIM2 front panel.
Thus, when a cable must be fabricated, use the pinout diagram shown in
Figure 3.20 (page 3–28) as the basis for wiring the cable.