Rockwell Automation 45CPD Analog Laser Sensor User Manual

Page 4

Object Position—Analog Output (4 to 20mA)

Once in the Teach-In mode press the



button and advance until

both the A

and

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

and

LEDs

will blink.)

Press the



button and advance until both the A

and

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

in a background suppression mode,

follow the same procedure as in the single output

mode above,

except move the switch on point

(

)

closer to the sensor as

Output

AS1 & BS1

AS2 & BS2

100%

Analog Output

Analog Curr

ent (mA)

shown in the diagram below (creates a larger switching window).
Background targets will be suppressed beyond the A

switch

point.

Object Detection—Reflector Mode Using a Background
Object as the Reflector

To set the output for Q

in the reflector mode, follow the same

procedure as in the single output

mode above. Set the A

and A

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

and

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

Output

Background

Is Suppressed

Background
Target Used
as Reflector