Rockwell Automation 45CPD Analog Laser Sensor - Manual (Page 4)

4
Object Position—Analog Output (4 to 20mA)
Once in the Teach-In mode press the  button and advance until
both the A S1 and B S1 function LEDs are turned on. This is also
indicated by “0% analog” on the teach-in pad.
Position the target at the desired 0% position (4 mA) and then
press the SET button.
(If the target is not within the measuring range or cannot be
detected both A
S1 and B S1 LEDs will blink.)
Press the  button and advance until both the A S2 and B S2
function LEDs are turned on. This is also indicated by “100%”
analog on the teach-in pad.
Position the target at the desired 100% position (20 mA) and then
press the SET button.
The 4…20 mA analog output is automatically scaled between the
0% and 100% positions which have been set.
After the settings have been completed successfully, press SET
and
 simultaneously for approximately one second to begin
normal operation.
(Note: The minimum measuring range for the analog output is
600 mm. If the setpoints are less than 600 mm apart, the sensor
will automatically scale the analog output (0…100%) to 600 mm
and the midpoint of this will be automatically set at the midpoint
between the two original setpoints.)
(Note: To invert the slope, the 0% position and 100% position
settings will need to be reversed and reset. The 0% setting is the
“close” setting for a positive slope. For a negative slope the 0%
setting should be the “far” setting.)
Object Detection—Background Suppression
To set the output for Q A in a background suppression mode,
follow the same procedure as in the single output mode above,
except move the switch on point ( A S1 ) closer to the sensor as
Q B
Output
B S2
B S1
Q A
Output
A S2
A S1
AS1 & BS1
0%
AS2 & BS2
100%
Analog Output
Analog Curr
ent (mA)
20
4
shown in the diagram below (creates a larger switching window).
Background targets will be suppressed beyond the A
S2
switch
point.
Object Detection—Reflector Mode Using a Background
Object as the Reflector
To set the output for Q
A
in the reflector mode, follow the same
procedure as in the single output mode above. Set the A
S1
and A
S2
switch points such that the background “reflector” will be
approximately midway between them as shown in the figure
below. The background object can be a floor, wall, conveyor, etc.
The output can be set up for Light Operate or Dark Operate by
inverting the output. Press
 until both the A S1 and A S2 LEDs are
turned ON and then press the SET button. This is also indicated
by “INV” on the teach-in pad.
Application Notes
1. The sensor should be powered for approximately five minutes
for maximum precision.
Accessories
Publication 75009-268-01(C)
[068-13807]
April 2008
Description Cat. No.
2 m (6.5 ft) micro DC cordset 889D-F5AC-2
Mounting Bracket 45CPD-BKT1
Q
A
Output
A
S2
A
S1
Background
Is Suppressed
Background
Target Used
as Reflector
A
S2
A
S1