MICRO-EPSILON colorSENSOR CFO User manual

MICRO-EPSILON Eltrotec GmbH
Manfred-Wörner-Straße 101 · 73037 Göppingen / Germany
Tel. [phone] · Fax [phone]
[email protected] · www.micro-epsilon.com
Your local contact: www.micro-epsilon.com/contact/worldwide/
CFO100
CFO200
Operating Instructions
colorSENSOR CFO

Sensor system for testing opaque, transparent and self-luminous objects
MICRO-EPSILON Eltrotec GmbH
Manfred-Wörner-Straße 101
73037 Göppingen / Deutschland
Tel. [phone]
Fax [phone]
e-mail [email protected]
www.micro-epsilon.de

colorSENSOR CFO
Contents
1. Safety ........................................................................................................................................ 9
1.1 Symbols Used ................................................................................................................................................. 9
1.2 Warnings.......................................................................................................................................................... 9
1.3 Notes on CE Marking .................................................................................................................................... 10
1.4 Intended Use ................................................................................................................................................. 10
1.5 Proper Environment....................................................................................................................................... 11
2. Functional Principle, Technical Data ..................................................................................... 12
2.1 Short Description........................................................................................................................................... 12
2.2 Measuring Principle ....................................................................................................................................... 12
2.3 Color Spaces ................................................................................................................................................. 13
2.4 Color Tolerance Models................................................................................................................................. 13
2.5 Functions ....................................................................................................................................................... 16
2.5.1 General ......................................................................................................................................... 16
2.5.2 Color Processing.......................................................................................................................... 16
2.6 Technical Data CFO100................................................................................................................................. 17
2.7 Technical Data CFO200................................................................................................................................. 19
2.8 Display Elements ........................................................................................................................................... 21
3. Delivery ................................................................................................................................... 22
3.1 Unpacking, Included in Delivery.................................................................................................................... 22
3.2 Storage .......................................................................................................................................................... 22
4. Installation and Assembly...................................................................................................... 23
4.1 Installation and Mounting .............................................................................................................................. 23
4.2 Operating Elements....................................................................................................................................... 25
4.3 Controller LEDs.............................................................................................................................................. 26
4.3.1 System, Power and PLC (SYS) .................................................................................................... 29
4.3.2 Ethernet (ETH) ............................................................................................................................. 30
4.3.3 Digital I/O (I/O).............................................................................................................................. 31
4.3.4 USB............................................................................................................................................... 32
4.3.5 Switching Input Circuit ................................................................................................................. 33
4.3.6 Output Configuration.................................................................................................................... 35
4.4 CFS Sensor.................................................................................................................................................... 37
5. Operation ................................................................................................................................ 39

colorSENSOR CFO
5.1 Initial Operation.............................................................................................................................................. 39
5.2 Configuration of the CFO Controller ............................................................................................................. 41
5.3 Membrane Keys............................................................................................................................................. 41
5.3.1 Key Functions ............................................................................................................................... 42
5.3.2 Operation Using Membrane Keypad ........................................................................................... 43
5.3.3 Intensity ........................................................................................................................................ 45
5.3.3.1 Automatic Modulation ................................................................................................. 46
5.3.3.2 Manual Intensity Control ............................................................................................. 48
5.3.4 Color Management....................................................................................................................... 50
5.3.4.1 Teaching Colors .......................................................................................................... 51
5.3.4.2 Deleting Individual Color Groups................................................................................ 52
5.3.4.3 Saving or Quitting upon Completion of Teaching Process ........................................ 53
5.3.5 Deleting Color Table ..................................................................................................................... 53
5.3.6 Tolerance Setting.......................................................................................................................... 55
5.3.7 Options ......................................................................................................................................... 58
5.3.7.1 IN0 Switching Input Function Assignment.................................................................. 59
5.3.7.2 Hold Time .................................................................................................................... 61
5.3.7.3 Multi-Teach Mode ........................................................................................................ 62
5.3.7.4 Tolerance Mode........................................................................................................... 63
5.3.7.5 Conclusion of Option Settings: Save or Quit.............................................................. 65
5.3.8 Key Lock ....................................................................................................................................... 65
5.4 Configuration via Ethernet............................................................................................................................. 66
5.4.1 Requirements ............................................................................................................................... 66
5.4.2 Access via Ethernet (Connection Establishment)........................................................................ 68
5.5 Web Interface................................................................................................................................................. 70
5.5.1 Home Menu.................................................................................................................................. 72
5.5.2 Color Display ................................................................................................................................ 73
5.5.3 Settings Display............................................................................................................................ 74
5.5.4 Measurement Menu...................................................................................................................... 75
5.5.4.1 Location Chart / Third Angle Projection...................................................................... 78
5.5.4.2 Timeline ....................................................................................................................... 79
5.5.5 Info Menu...................................................................................................................................... 82
5.6 System Parameterization via Web Interface (Menu Settings)....................................................................... 83
5.6.1 Preliminary Remarks about the Settings...................................................................................... 83
5.6.2 Parameters Overview ................................................................................................................... 84
5.6.3 Detection Profile ........................................................................................................................... 85

colorSENSOR CFO
5.6.3.1 Manage Detection Profiles.......................................................................................... 86
5.6.3.2 Current Detection Profile............................................................................................. 87
5.6.3.3 Automatic Modulation ................................................................................................. 88
5.6.3.4 White Reference .......................................................................................................... 90
5.6.4 Color Group (Matcher) ................................................................................................................. 92
5.6.4.1 Distance / Tolerance Space ........................................................................................ 93
5.6.4.2 Hold Time .................................................................................................................... 94
5.6.5 Color Table.................................................................................................................................... 95
5.6.5.1 Add Color Group......................................................................................................... 97
5.6.5.2 Teaching and Editing Colors....................................................................................... 98
5.6.5.3 Deleting Colors, Color Table ..................................................................................... 103
5.6.6 Trigger Input .............................................................................................................................. 104
5.6.7 Outputs ....................................................................................................................................... 109
5.6.8 System Settings.......................................................................................................................... 111
5.6.8.1 Select Language ....................................................................................................... 112
5.6.8.2 Switch User ............................................................................................................... 113
5.6.8.3 Ethernet Settings....................................................................................................... 115
5.6.8.4 Managing Settings .................................................................................................... 119
5.6.8.5 Reset Sensor............................................................................................................. 121
5.6.8.6 Update Firmware....................................................................................................... 122
5.7 Factory Reset............................................................................................................................................... 123
6. Notes for Operation.............................................................................................................. 124
6.1 Cleaning....................................................................................................................................................... 124
7. Disclaimer............................................................................................................................. 125
8. Service, Repair .................................................................................................................... 126
9. Decommissioning, Disposal ................................................................................................ 127

colorSENSOR CFO
Appendix
A 1 Optional Accessories........................................................................................................... 128
A 2 Factory Settings ................................................................................................................... 135
A 3 Interface Instructions ........................................................................................................... 136

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colorSENSOR CFO

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colorSENSOR CFO

Page 9
Safety
colorSENSOR CFO
1. Safety
System operation assumes knowledge of the operating instructions.
1.1 Symbols Used
The following symbols are used in these operating instructions:
CAUTION Indicates a hazardous situation which, if not avoided, may result in minor or moderate
injury.
NOTICE
Indicates a situation that may result in property damage if not avoided.
Indicates a user action.
iIndicates a tip for users.
Measurement Indicates hardware or a software button/menu.
1.2 Warnings
Connect the power supply and the display/output device according to the safety regulations for electrical
equipment.
> Risk of injury
> Damage to or destruction of the controller or the measuring system
The supply voltage must not exceed the specified limits.
> Risk of injury
> Damage to or destruction of the controller or the measuring system
Avoid shocks and impacts to the controller or the sensor or the measuring system. Damage to or destruction
of the controller or the measuring system.
Never fold the sensor (optical fiber) and do not bend it in tight radii.
> Damage to or destruction of the sensor, partial failure of the measuring system
Protect the ends of the sensor against contamination (use protective caps).
> Failure of the test instrument
CAUTION
NOTICE

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Safety
colorSENSOR CFO
1.3 Notes on CE Marking
The following apply for the colorSENSOR CFO:
- EU Directive 2014/30/EU
- EU Directive 2011/65/EU
Products which carry the CE mark satisfy the requirements of the EU directives cited and the relevant appli-
cable harmonized European standards (EN). The measuring system is designed for use in industrial environ-
ments.
The EU Declaration of Conformity and the technical documentation are available to the responsible authori-
ties according to the EU Directives.
1.4 Intended Use
- The colorSENSOR CFO is designed for use in an industrial environment. It is used for
Relative color measurement or inspection
Intensity measurement
Completeness check (presence and absence)
Measurement of surface properties or texture
Material recognition/identification
Position determination
Product sorting
- The system must only be operated within the limits specified in the technical data, see 2.6.
- The testing system must be used in such a way that no persons are endangered or machines and other
material goods are damaged in the event of malfunction or total failure of the system.
- Take additional precautions for safety and damage prevention in case of safety-related applications.

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Safety
colorSENSOR CFO
1.5 Proper Environment
- Protection class: IP65
- Temperature range
Operation: -10 ... +55 °C (+14 ... +131 °F)
Storage: -10 ... +85 °C (+14 ... +185 °F)
- Humidity: 20 - 80 % relative humidity (non-condensing)
- Ambient pressure: Atmospheric pressure
The controller can be used in a wide temperature range and is stable. When all sockets are in use or plugged
with a protective cap, the sensor can be used safely even under contaminated environmental conditions.

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Functional Principle, Technical Data
colorSENSOR CFO
2. Functional Principle, Technical Data
2.1 Short Description
The colorSENSOR CFO is an optical controller for precise color recognition for industrial measurement, built
into a sturdy aluminum housing. The controller is distinguished by high color accuracy, state-of-the-art inter-
faces and intuitive operation. Sensors with optical fiber cables, which can be adapted for various measuring
tasks, are connected to the controller. The rear of the controller allows fixation using the dovetail principle. A
mounting adapter (DIN rail mounting kit) for DIN rail mounting is available separately.
2.2 Measuring Principle
The measuring system for relative color measurement/inspection consists of an evaluation unit – the CFO
controller – and a CFS sensor. The sensor is connected to the controller via an optical fiber.
Optical fiber Sensor
Interfaces
Fig. 1 Measuring principle
The specimen is illuminated with homogeneous, white light from an LED. A CFS sensor is used to project a
point of illumination onto the surface to be inspected. The light is reflected diffusely at a specified angle and
transmitted by the same sensor to a perceptive True Color receiver (XYZ) where it is analyzed.

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Functional Principle, Technical Data
colorSENSOR CFO
The three wavelength ranges, i.e.
- X = long wave,
- Y = medium wave and
- Z = short wave light portions
from the specimen are used to determine the diffuse color reflections and thereby transformed into a selected
color space. These color values are calculated according to the procedure described in DIN 5033.
The transformed values (colors), are stored in the controller and continuously compared to the current color.
When the colors are all within the entered tolerance range, a recognition signal is sent to the digital switching
outputs and the keypad indicators. This process allows storage of multiple colors in various color spaces.
In the same manner, the color values and the recognized color are output as data protocol via the available
interfaces as required.
2.3 Color Spaces
With the colorSENSOR CFO you can measure the following color spaces:
XYZ, xyY, L*a*b*, L+u*v*, L*u‘v‘
iFor more details on color spaces, please refer to https://www.micro-epsilon.com/download/products/ dat--Basics-of-colorimetry--en.pdf.
2.4 Color Tolerance Models
Relative color measurement is often referred to as color inspection. The color of the measuring object and the
reference sample is detected with the same sensor and the color distance (Delta Erel) is evaluated based on
the difference of the values.
iNote: The color distance between target and reference sample is determined with the same sensor (Delta Erel).
The CFO controller works with a relative color measurement and thus with different tolerance models.
The permissible color distance for the color to be controlled is stored in a tolerance model. If the measured
value is outside the tolerance, the CFO controller outputs the switching output for Color not recognized. If the
measured value is within the tolerance, the corresponding output for the detected color is signaled.

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Functional Principle, Technical Data
colorSENSOR CFO
The system can be set to the distance models Sphere (∆E), Cylinder (∆L; ∆ab), Box (cuboid, ∆L; ∆a; ∆b) and
Classify. These models form a tolerance space around the learned colors.
Cm
C1
2E
L
b
a
L
b
a
Cm
C1
2L
2a b L
b
a
C1
2a
2b
2L
Cm
Fig. 2 Tolerance space Sphere Fig. 3 Tolerance space Cylinder Fig. 4 Tolerance space Box
C1= learned color 1
Cm= detected color
For an evaluation of color deviations, the color tolerance parameters should be based on the perception
thresholds for color differences. In the Lab color space, a tolerance threshold of ∆E > 1 is frequently used for
perceptible color differences.
Influencing factors for setting color tolerance parameters:
- Required accuracy for color recognition
- Tolerance for reading variations.

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Functional Principle, Technical Data
colorSENSOR CFO
A change in the color readings for one and the same specimen can have two causes:
- Internal factors. Change in readings due to detector noise, changes in brightness of the light source or
modulated ambient light.
- External factors. Deviations in color or surface texture of specimens or in measuring conditions (distance,
angle).
Define the color distance tolerances so that the tolerance limits are greater than the change in the readings
for acceptable specimens.
The Sphere tolerance space or rather ∆E denotes the color distance in a color space or how far apart the
colors of the target and the reference object to be compared are in the spatial model. The larger the differ-
ence between the colors, the more clearly the difference can be perceived. For the tolerance model Sphere
only one value can be set, (∆E = root(∆L^2+∆a^2+∆b^2)). With this tolerance model, it is not possible to
determine in which color parameter the decisive change in color is present.
If you select the tolerance space Cylinder, tolerance values are set and evaluated separately for the bright-
ness value L and the color values a/b.
iTolerance space Cylinder is useful if higher distance variants are present during the measurement, since here the value for brightness L and the values for color a and b are assigned to separate tolerance
parameters.
In the Box tolerance model, separate tolerance values can be set for the L, a and b color values. This enables
more precise color inspections.
With Classify the current color readings are associated with the closest color value (shortest direct dis-
tance) saved in the color table. In this mode, classification is always accomplished regardless of the actual
similarity between the selected colors.
For example, if red is the only color saved in the table, all color readings are associated with this color. In the
diagram below, three colors are stored in the controller, C1...C3. Cm corresponds to the currently measured
color. In the Classify mode, the controller now determines to which stored color the delta E (D1 ... D3) from
Cm to C1 ... C3 is the smallest, see Fig. 5.
Since the distance D3 between Cm and C3 is the smallest, the detected color is assigned to the color output
of color C3 and output by the controller.

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Functional Principle, Technical Data
colorSENSOR CFO
C3
D1
C2
L
C1
a
b*
D2
D3
Cm
Fig. 5 Distance model Classify
2.5 Functions
2.5.1 General
- Recognition of learned colors
- Control interfaces
Keys and displays
REST API, described in Interface Instructions, see A 3
RS232, described in Interface Instructions, see A 3
Trigger inputs
- Signaling/monitoring of recognition results via
Switching outputs
all interfaces mentioned above
2.5.2 Color Processing
- Compilation of colors to form recognition groups
- Variable color tolerance for each recognition group
- Selection of various color spaces
- Flexible averaging

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Functional Principle, Technical Data
colorSENSOR CFO
2.6 Technical Data CFO100
Type CFO100 CFO100(100)
Article number 10234670 10234670.100
No. of measurement chan-
nels 1
Repeatability 1∆E ≤ 0.5
Color distance ∆E ≤ 1.0
Spectral range 400 ... 680 nm
Color spaces XYZ, xyY, L*a*b*, L*u*v*, u’v’L
Illuminants D65
Standard observer 2°
Tolerance model Classification; sphere (∆E); cylinder (∆L, ∆ab); box (∆L, ∆a, ∆b)
Color memory Max. 256 colors in non-volatile EEPROM with parameter sets
Measuring rate max. 10 kHz, standard 1 kHz
(depending on number of colors learned and setting for averaging)
Temperature stability < 0.1 % FSO / K
Light source White light LED (425 ... 750 nm), AC operation (luminous flux at 1 kHz 130 lm)
(adjustable or OFF for primary light source, switchable via software)
Permissible ambient light max. 5000 lx
Synchronization Possibility of synchronization is given
Supply voltage 18 ... 28 VDC
Max. current consumption 500 mA
Signal input 1 (IN0), configurable via keypad or website
(trigger, teach, delete, lock, calibration)
Digital interface RS232 (standard 9600 kBaud) 2,
Ethernet
Ethernet, Modbus
(TCP/RTU), PROFINET 3,
EtherNet/IP 3, EtherCAT 3
Switching output OUT0-OUT2 Push-Pull / NPN / PNP
(color recognition, binary coding 6 color groups)

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Functional Principle, Technical Data
colorSENSOR CFO
Type CFO100 CFO100(100)
Connection
Optical Screwable optical fiber via FA socket M18x1, length 0.3 m ... 2.4 m,
min. bending radius 18 mm
Electrical 8-pin flange connector M12A (Power/PLC); 4-pin flange socket M12D
(PC/Ethernet DHCP-capable) (connection cable see accessories)
Assembly DIN rail mounting/screw connection via adapter (see accessories)
Temperature
range
Storage -10 ... +85 °C (+14 ... +131 °F)
Operation -10 ... +55 °C (+14 ... +185 °F)
Humidity 20 … 80 % r. H. (non-condensing)
Shock (DIN EN 60068-2-27) 15 g / 6 ms in 3 axes, two directions and 1000 shocks each
Vibration (DIN EN 60068-2-6) 2 g / 10 … 500 Hz in 3 axes, 10 cycles each
Protection class
(DIN EN 60529) IP65 (when connected)
Material Aluminum, black anodized
Weight approx. 200 g
Compatibility with all CFS sensors 4
Control and indicator ele-
ments
Operation via keypad and web interface,
visualization with 13 white LEDs
Special features
Multi-color teach function, automatic adjustment of illumination brightness,
measurement signal amplification and
averaging depending on the measurement frequency,
adjustable hold time of > 30 µs
FSO = Full Scale Output
1) Maximum color distance ∆E of 1000 successive measurements of the color value of a red and a dark gray
reference tile (R = 5%), measured with sensor CFS4-A20 at 1000 Hz and brightness adjustment with a white
standard (R=95%)
2) Adjustable up to max. 115200 kBaud
3) Optional connection via interface module
4) Also compatible with previous series (FAR, FAD, FAL, FAZ and FAS)

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Functional Principle, Technical Data
colorSENSOR CFO
2.7 Technical Data CFO200
Type CFO200 CFO200(100)
Article number 10234671 10234671.100
No. of measurement channels 1
Repeatability 1∆E ≤ 0.3
Color distance ∆E ≤ 0.6
Spectral range 400 ... 680 nm
Color spaces XYZ, xyY, L*a*b*, L*u*v*, u’v’L
Illuminants D65
Standard observer 2°
Tolerance model Classification; sphere (∆E); cylinder (∆L, ∆ab); box (∆L, ∆a, ∆b)
Color memory Max. 320 colors in non-volatile EEPROM with parameter sets
Measuring rate max. 10 kHz, standard 1 kHz
(depending on number of colors learned and setting for averaging)
Temperature stability < 0.1 % FSO / K
Light Source White light LED (425 ... 750 nm), AC operation (luminous flux at 1 kHz 220 lm)
(adjustable or OFF for primary light source, switchable via software)
Permissible ambient light max. 5000 lx
Synchronization Possibility of synchronization is given
Supply voltage 18 ... 28 VDC
Max. current consumption 500 mA
Signal input 4 (IN0-IN3) via keypad; IN0-IN3 or web page configurable (trigger, teach,
clear, lock, adjust)
Digital interface RS232 (standard 9600 kBaud) 2,
Ethernet, USB
Ethernet, Modbus
(TCP/RTU), USB, PROFINET 3,
EtherNet/IP 3, EtherCAT 3
Switching output OUT0-OUT2 Push-Pull / NPN / PNP
(color recognition, binary coding 254 color groups)

Page 20
Functional Principle, Technical Data
colorSENSOR CFO
Type CFO200 CFO200(100)
Connection
Optical Screwable optical fiber via FA socket M18x1, length 0.3 m ... 2.4 m,
min. bending radius 18 mm
Electrical
8-pin flange socket M12A (Power/PLC); 8-pin flange socket M12A (signal);
4-pin flange socket M12D (Ethernet DHC capable);
5-pin flange socket M12A (USB) (connection cable see accessories)
Assembly DIN rail mounting/screw connection via adapter (see accessories)
Temperature
range
Storage -10 ... +85 °C
Operation -10 ... +55 °C
Humidity 20 … 80 % r. H. (non-condensing)
Shock (DIN EN 60068-2-27) 15 g / 6 ms in 3 axes, two directions and 1000 shock each
Vibration (DIN EN 60068-2-6) 2 g / 10 … 500 Hz in 3 axes, 10 cycles each
Protection class
(DIN EN 60529) IP65 (when connected)
Material Aluminum, black anodized
Weight approx. 200 g
Compatibility with all CFS sensors 4
Control and Indicator Ele-
ments
Operation via keypad and web interface,
visualization with 13 white LEDs
Special features
Multi-color teach function, automatic adjustment of illumination brightness,
measurement signal amplification and
averaging depending on the measurement frequency,
adjustable hold time of > 30 µs
FSO = Full Scale Output
1) Maximum color distance ∆E of 1000 successive measurements of the color value of a red and a dark gray
reference tile (R = 5%), measured with sensor CFS4-A20° at 1000 Hz and brightness adjustment with a white
standard (R=95%)
2) Adjustable up to max. 115200 kBaud
3) Also compatible with interface modules
4) Also compatible with previous series (FAR, FAD, FAL, FAZ and FAS)