Controls and indicators mounting, Wiring, Sensitivity adjustment overview – Rockwell Automation 45CRM Color Registration Mark Sensor User Manual

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10000237458 Ver 00 Copyright © 2012 Rockwell Automation, Inc. All Rights Reserved.
March 2012

Controls and indicators

Mounting

Securely mount the sensor on a firm, stable surface or support for
reliable operation. A mounting subject to excessive vibration or
shifting may cause intermittent operation. A mounting bracket is
available for installation convenience. Once securely mounted,
the sensor can be wired per the wiring instructions in the next
section.

Wiring

The 45LMS features complementary Push-Pull discrete outputs.
This means the outputs always drive either 24V or 0V and can
therefore be wired like either an NPN or a PNP sensor. For
example, when the sensor detects a registration mark, output Q1
will go to 24V and output Q2 will go to 0V. If the sensor is wired
for a PNP output, Q1 is ON when the sensor detects a mark and
Q2 is OFF. If wired for an NPN output, Q1 is OFF when the
sensor detects a mark and Q2 is ON.

The 45CRM photoelectric sensor is available with a micro QD
(M12) for ease of installation and maintenance.

Rockwell Automation recommends the use of the 889 Series of
cord sets and patch cords for quick-disconnect (QD) model
sensors. All external wiring should conform to the National
Electric Code and all applicable local codes.

Sensitivity adjustment overview

There are two simple teach methods for the 45CRM. The first
method is Static Teach, which is intended for applications where
the web can be stopped, or for more challenging applications.
The second method is Dynamic Teach, which is well suited for
applications where the web cannot be stopped for sensor
implementation.

Alarm feature: The 45CRM also has an alarm feature that alerts
the user via LEDs that the contrast taught is too low. The Green
and Yellow LEDs will flash at 8 Hz for approximately 7 seconds.
The sensor will revert to the last valid set-point for the mark and
the background.

If the surface of the target object is shiny or
reflective, orient the sensor so it is angled at
approximately 10° to the surface.

Yellow LEDs

Rotary Switch

Green LED

Operating

indicator

Signal indiaors

IMPORTANT

White

Brown

LOAD

−

(Q2)

(Q1)

LOAD

NPN or PNP (Push-Pull)

Static Teach Mode

The static teach process is used to teach the sensor when the
web is not moving. It is sometimes required for more challenging
applications, as it allows for a more precise setup of the sensor.

The user teaches the registration mark color and the background
color separately. Either can be taught first. It is highly
recommended to teach both every time in order to achieve the
most reliable detection. However, it is not always necessary to
teach both. For example, you have to teach only the new mark
when the mark color changes

but the background remains the

same.

Teach Mark (TM)

Follow these steps to teach the mark:

1. Move the Rotary Switch to TM (The front Green and Yellow

LEDs will flash simultaneously indicating the sensor is ready to
be taught the mark.)

2. Place the mark in the light spot.
3. Move the Rotary Switch to S (or TB). The 45CRM learns the

color that is in the light spot when you move the Rotary Switch
away from TM.

4. Continue to the next section.

Teach Background (TB)

Follow these steps to teach the background:

1. Move the Rotary Switch to TB (The front Green and Yellow

LEDs will flash alternately, indicating the sensor is ready to be
taught the background.)

2. Place the background in the light spot.

3. Move the Rotary Switch to S for normal operation. The 45CRM

learns the color that is in the light spot when you move the
Rotary Switch away from TB.

Dynamic Teach Mode

The dynamic mode is used to teach the sensor while the web is
moving. The sensor automatically detects the background color
and the mark color as each passes through the sensor's
detection area (light spot). It selects the appropriate emitter LED
color and sets the threshold so that the primary output turns on
when the sensor detects a mark.

Teach Dynamic (TD)

Follow these steps to teach using dynamic mode:

1. Move the Rotary Switch to TD.
2. Verify that at least one registration mark passes through the

light spot.

3. After a minimum of 2 seconds have elapsed, turn the Rotary

Switch to S for normal operation.

If the sensor does not display the Alarm Feature, then the
Dynamic Teach was successful.

When you change the Rotary Switch position, the
new mode takes effect after a 2-second delay. The
LEDs will not change state during this delay.

IMPORTANT

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