This section describes the functions that can be set.
3-1 ZX-L Series...31 3-1-1 ZX-L Series Outline ...32 3-1-2 Sensor Heads ...32 3-1-3 Amplifier Units...32 3-1-4 Calculating Unit...32 3-1-5 Channel Numbers of Amplifier Units...33 3-2 Hardware Functions ...34 3-2-1 Inputs ...34 3-2-2 Outputs ...35 3-2-3 Performance ...37 3-3 Reflective Sensor Heads: RUN Mode Functions ...38 3-3-1 Sub-display Changes...38 3-3-2 Zero Reset/Release...38 3-4 Reflective Sensor Heads: T Mode Functions ...41 3-4-1 Teaching ...41 3-4-2 Inputting Threshold Values Directly ...43 3-5 Reflective Sensor Heads: FUN Mode Functions ...44 3-5-1 Scaling ...44 3-5-2 Number of Samples to Average...51 3-5-3 Hysteresis Setting ...52 3-5-4 Hold Functions...52 3-5-5 Timer...61 3-5-6 Two-sensor Operation ...63 3-5-7 Initializing Settings ...64 3-5-8 Monitor Focus Function ...65 3-5-9 Intensity Mode ...68 3-5-10 Differentiation Function...68 3-5-11 Display Reverse Function...69
3-5-12 ECO Display Function ...69 3-5-13 Limiting the Number of Display Digits...69 3-5-14 Setting for Non-measurement...69 3-5-15 Zero Reset Memory Function ...70 3-5-16 Gain Switch...70 3-5-17 Key Lock Function ...70 3-6 Through-beam Sensor Heads: RUN Mode Functions...71 3-6-1 Sub-display Changes...71 3-6-2 Reference Incident Level Setting Function ...72 3-6-3 Zero Reset/Release...72 3-7 Through-beam Sensor Heads: T Mode Functions ...75 3-7-1 Teaching ...75 3-7-2 Inputting Threshold Values Directly ...78 3-8 Through-beam Sensor Heads: FUN Mode Functions ...79 3-8-1 Auto-scaling ...79 3-8-2 Scaling ...80 3-8-3 Number of Samples to Average...87 3-8-4 Hysteresis Setting ...88 3-8-5 Hold Functions...89 3-8-6 Timer...97 3-8-7 Two-sensor Operation ...99 3-8-8 Initializing Settings ...100 3-8-9 Monitor Focus Function ...102 3-8-10 Differentiation Function...104 3-8-11 Display Reverse Function...104 3-8-12 ECO Display Function ...104 3-8-13 Limiting the Number of Display Digits...105 3-8-14 Setting for Non-measurement...105 3-8-15 Zero Reset Memory Function ...105 3-8-16 Gain Switch...105 3-8-17 Key Lock Function ...106
ZX-L Series Section 3-1
31
3-1 ZX-L Series
The ZX Series are the first of the Smart Sensors from OMRON. In the ZX Series, ZX-L Laser Sensors include displacement (Reflective) and length-measuring (through-beam) sensors. The lineup is as follows:
Model Sensing method Function
Sensing center distance or sensing width
ZX-LDA11 - Amplifier Unit:
NPN output
-ZX-LDA41 - Amplifier Unit:
PNP output
-ZX-LD40 Diffuse reflective sensor
Sensor Head:
Spot type
40 mm
ZX-LD100 Diffuse reflective sensor
Sensor Head:
Spot type
100 mm
ZX-LD300 Diffuse reflective sensor
Sensor Head:
Spot type
300 mm
ZX-LD40L Diffuse reflective sensor
Sensor Head:
Line type
40 mm
ZX-LD100L Diffuse reflective sensor
Sensor Head:
Line type
100 mm
ZX-LD300L Diffuse reflective sensor
Sensor Head:
Line type
300 mm
ZX-LD30V Regular reflective sensor
Sensor Head:
Spot type
30 mm
ZX-LD30VL Regular reflective sensor
Sensor Head:
Line type
30 mm
ZX-LT001 Through-beam sensor
Sensor Head Sensing width:
1-mm dia.
ZX-LT005 Through-beam sensor
Sensor Head Sensing width:
5 mm ZX-LT010 Through-beam
sensor
Sensor Head Sensing width:
10 mm
ZX-CAL - Calculating Unit
-ZX-XC1A - Extension Cable:
1 m
-ZX-XC4A - Extension Cable:
4 m
-ZX-XC8A - Extension cable:
8 m
-ZX-XC9A - Extension cable:
9 m
-ZX-L Series Section 3-1
32
3-1-1 ZX-L Series Outline
The ZX-L Series consists of high-accuracy, advanced sensors designed to use a laser light emitted onto the sensing object to measure the distance between the sensing object and the Sensor Head, judge the sensing object surface status, position, and obtain width measurements. A Sensor Head and Amplifier Unit are used in combination.
3-1-2 Sensor Heads
A Reflective Sensor Head measures the distance between the Sensor Head and the sensing object using emitter and receiver elements. The value is converted to an electric signal and sent to the Amplifier Unit.
With a Through-beam Sensor Head, the emitter radiates the laser beam as a collimated light beam, and the receiver senses the variation in inci-dent level caused by the sensing object. The value is converted to an elec-tric signal and sent to the Amplifier Unit.
3-1-3 Amplifier Units
The signal from the Sensor Head is received and the value is displayed and output externally. Holding and timing controls are performed. In addi-tion, two Amplifier Units can be connected to each other to perform calcu-lations.
3-1-4 Calculating Unit
A Calculating Unit is required to connect two Amplifier Units.
Calculations of A−B and A+B can be performed when two Units are con-nected.
Various settings of Amplifier Unit reset to the default status when the Sensor Head is replaced with one with a different sensing dis-tance.
POINT
ZX-L Series Section 3-1
33 3-1-5 Channel Numbers of Amplifier Units
When two Amplifier Units are connected and set in the normal display direction, 1CH (channel 1) is used by the Unit on the top and 2CH (channel 2) is used by the Unit on the bottom.
2CH 1CH
Calculating Unit
Hardware Functions Section 3-2
34
3-2 Hardware Functions 3-2-1 Inputs
Power Supply (12 to 24 VDC)
A 12 to 24-VDC power supply is connected to the power supply terminal.
When using an Amplifier Unit with a PNP output, the power supply terminal is also the common I/O terminal for all I/O except for the linear output.
GND (0 V)
The GND terminal is the 0-V power supply terminal. When using an Ampli-fier Unit with an NPN output, the GND terminal is also the common I/O ter-minal for all I/O except for the linear output.
Laser OFF Input
When the Laser OFF input is turned ON, the laser emission will turn OFF, will be displayed on the sub-display, and an optical level error will occur. The linear output, main display, judgement outputs, and judge-ment output indicators will be output according to the setting for non-mea-surement.
Zero Reset Input
The zero reset input is used to reset zero or to release the zero reset. The settings are as follows, according to the length of time the input is ON:
The above operations are performed when the input is turned OFF.
Timing Input
The timing input is used to control the timing of the hold functions. Sam-pling is performed while this input is ON. It is used, for example, to hold a specified measured value from during the time that the timing input is ON.
Reset Input
The reset input is used to reset the outputs. When the reset input is turned ON, internal operation is interrupted and the specified values are output from the judgement and linear outputs.
Input pulse ON time Operation
0.2 to 0.8 s Zero reset
Over 1 s Zero reset release
Hardware Functions Section 3-2
35
The following values are output according to the setting for non-measure-ment.
Maximum output voltage: Approximately 5.5 V Maximum output current: Approximately 23 mA
3-2-2 Outputs
Judgement Outputs
There are three judgement outputs: HIGH, PASS, and LOW.
The following table and illustration show the timing of each output.
Threshold Values
The threshold values form the boundaries between the HIGH, PASS, and LOW outputs for the measured value.
There are two threshold values: The HIGH threshold and the LOW threshold. The threshold values contain hysteresis.
Hysteresis
The hysteresis (hysteresis width) is the difference between the operating and releasing values. If the hysteresis is too small, chattering may occur.
If it is too large, releasing may be difficult.
Output Setting for non-measurement
CLAMP KEEP
Judgement outputs All OFF The values immediately before the non-measure-ment status are kept.
Linear output Maximum output value is held.
Main display “- - - - -“
Sub-display
The averaging operation is cleared for the reset input. The judge-ment output response thus may be slower than normal immediately after releasing the reset input.
POINT
Measured value Judgement outputs
Larger than or equal to HIGH threshold PASS → HIGH Smaller than or equal to HIGH threshold − Hysteresis HIGH → PASS Smaller than or equal to LOW threshold PASS → LOW Larger than or equal to LOW threshold − Hysteresis LOW → PASS
Timing of Changes in Judgement Outputs
Hardware Functions Section 3-2
36
Relationship between Measured Value and Judgement Outputs Linear Output
The linear output can be switched between current output and voltage out-put.
Output current range: 4 to 20 mA (default value: 4 to 20 mA) Output voltage range: −5 to 5 V (default value: −4 to + 4 V)
The output scale can be changed using the monitor focus function. The maximum value of the current output is 23 mA and the maximum value of the voltage output is 5.5 V.
Linear Output GND
The linear output GND is the ground for the linear output. Connect it sepa-rately from the normal GND (0 V).
Always connect the linear output GND to ensure linearity and resolution for the linear output.
Hysteresis HIGH threshold
Measured value
LOW threshold
HIGH output ON Judgement Outputs
OFF ON OFF
ON OFF PASS output
LOW output
Releasing point Operating point Measured Value
Hardware Functions Section 3-2
37 3-2-3 Performance
Linearity
The linearity indicates how much linearity is maintained by the linear out-put against the displacement amount (incident level). The linearity is evalu-ated as the percentage of full scale (FS) represented by the deviation from an ideal straight line.
For example, the 80 ±40-mm measurement range of the ZX-LD100 has a 160-µm error, or a linearity of 0.2% FS.
Resolution
The resolution is the width of the deviations in the linear output. Width of deviation for the linear output is evaluated at ±3σ.
Temperature Characteristic
The temperature characteristic is measured as the deviation in the linear output against ambient temperature changes.
The temperature characteristic is evaluated as the percentage of change against FS for a 1°C temperature change (unit: %FS/°C).
Current Consumption
The current consumption is the maximum current consumed by the prod-uct. Use it as a guideline to supply electric current and power.
In addition, if the product’s current consumption is greater than or equal to the specified current consumption, an error may have occurred in the prod-uct. Immediately replace or repair it.
Ambient Operating Temperature
The ambient operating temperature is the temperature range for which specifications are given.
Ambient Operating Humidity
The ambient operating humidity is the humidity range for which specifica-tions are given.
Dielectric Strength
The dielectric strength is the voltage the product can endure when voltage is applied between the product case and the charged parts.
Vibration Resistance
The vibration resistance is the vibration level that can be applied to the product without affecting continued normal product operation.
Degree of Protection
The degree of protection indicates the tolerance of the product against dust and water. An “IP50” degree of protection indicates the following:
• The amount of dust that may enter the product will not interfere with nor-mal equipment operation and will not adversely affect safety.
• No special water protection is provided.
Reflective Sensor Heads: RUN Mode Functions Section 3-3
38
3-3 Reflective Sensor Heads:
RUN Mode Functions 3-3-1 Sub-display Changes
Items shown on the sub-display can be selected.
When Intensity Mode is OFF, the threshold values (HIGH/LOW), voltage value, current value, incident level, or resolution can be selected.
When Intensity Mode is ON, the threshold values (HIGH/LOW), voltage value, current value, or resolution can be selected.
3-3-2 Zero Reset/Release
The following are performed for the zero reset function:
• Setting the display value to 0.
• Setting the linear output to the center output value between two points set for the monitor focus when 0 is displayed (default current output: 12 mA, default voltage output: 0 V).
The zero reset can be also released.
Refer to 4-3-4 Zero Reset Function.
• Voltage display The voltage level of the linear output is dis-played.
• Current display The current level of the linear output is dis-played.
• Incident level display The incident level is displayed (0 to 9999)
• Resolution display The resolution of linear output is displayed.
Display values are provided as reference values. There may be some discrepancies in actual outputs.
The incident level displayed here is different from the one displayed on the main display when Intensity Mode is ON.
POINT
The inclination of the linear output value against the actual distance does not change when the zero reset is executed.
An error will occur if the zero reset is performed outside the mea-surement range.
POINT
Reflective Sensor Heads: RUN Mode Functions Section 3-3
39
Changes in Display Value and Linear Output for Zero Reset
140
For current output
For current output Time
Time When zero is reset
at 90 mm
For voltage output
For voltage output
4 6 12 20 22
When the displayed value is out of range, select KEEP or CLAMP for the setting for non-measurement.
Example: 4 to 20-mA output provides a center value of 12 mA.
: Linearity is not necessarily maintained in these areas.
Reflective Sensor Heads: RUN Mode Functions Section 3-3
40
Example: Zero Reset During Measurement
Refer to 3-5-15 Zero Reset Memory Function.
Sensor Head
Sensing object This height must be evaluated.
All that is necessary is to reset zero at the point indicated by the
arrow while measuring.
Measured value Without zero
reset
Threshold
Threshold Threshold must be set to an absolute height.
Accurate measurement is impossible.
With zero
reset Zero reset level
The height of the step is always Time evaluated in comparison to
the threshold.
Zero reset.
Zero reset.
Example: Use Zero Reset to Evaluate the Height of a Step in the Sensing Object
In this case, disabling the zero reset memory is recommended.
POINT
Reflective Sensor Heads: T Mode Functions Section 3-4
41
3-4 Reflective Sensor Heads:
T Mode Functions 3-4-1 Teaching
“Teaching” is used to perform calculations in the Sensor to automatically determine the threshold values by creating an actual operating environ-ment and detecting objects. After teaching, the threshold values can be precisely adjusted or teaching can be performed as many times as required.
There are three kinds of teaching: Position teaching, two-point teaching, and automatic teaching.
Refer to 4-4-1 Teaching Procedures.
Position Teaching
When teaching is executed, the measured value is set as a threshold.
Example: Position Teaching Press the
ENT Key.
Sensor Head
Teaching point
=Threshold
Sensing object
Reflective Sensor Heads: T Mode Functions Section 3-4
42
Two-point Teaching
The middle point between the first teaching point and the second point is set as a threshold. With two-point teaching, small steps, such as a sheet of paper, can be measured.
Example: Two-point Teaching Press the ENT
Key for the first point.
Press the ENT Key for a long time for the second point.
Sensor Head Sensor Head
Sensor Head Teaching point 1
Teaching point 2
T1
T2
Sensing object
Sensing object First Point
Threshold value determined.
Threshold:
(T1 + T2)/2
Threshold
Second Point
Reflective Sensor Heads: T Mode Functions Section 3-4
43
Automatic Teaching
For automatic teaching, measurements are performed while the RIGHT Key and the ENT Key are pressed at the same time. The center value between maximum and minimum values is set as a threshold.
The threshold value is set when the keys are released.
The threshold can be set according to the sensing object.
Example: Automatic Teaching
3-4-2 Inputting Threshold Values Directly
Threshold values can be directly input into the sub-display.
Note: Generally, any value can be input. The judgement outputs, however, will not operate for thresholds that are outside the measurement range. Also, the decimal point cannot be changed.
If an error occurs when inputting a threshold value, refer to 4-4-2 Inputting Threshold Values Directly and 5-2-3 Unable to Set Threshold Values.
Teaching
started. Sensor Head Sensor Head
Teaching completed.
Maximum value
Minimum value
Sensing object
Threshold:
(Maximum value - Minimum value)/2
Reflective Sensor Heads: FUN Mode Functions Section 3-5
44
3-5 Reflective Sensor Heads:
FUN Mode Functions 3-5-1 Scaling
Scaling is used to arbitrarily change the display value for the actual dis-tance. The display value for any distance can be input or changed.
When scaling one point, the display value offset is changed; the display value range is not changed. When scaling two points, both the range and offset of display values are changed.
Refer to 4-5-7 Setting Scaling.
Note: The display values for actual distances change when scaling is set, but the linear output values will remain unchanged.
The relation between actual distances and linear output values is set with the monitor focus function. To alter the output values, set the monitor focus after setting scaling.
Refer to 3-5-8 Monitor Focus Function.
One-point Scaling
Two-point Scaling
Display values
Display values
Display values
Display values Before scaling
After scaling
Before scaling
After scaling
Although the range cannot be changed, the offset can be changed.
The range and offset can be changed.
40
40
120
0 80
80
20 100
Reflective Sensor Heads: FUN Mode Functions Section 3-5
45
Inverting Display Values
When inverting the display values is set, the display values will be in an inverse relationship to the reference values.
Normally, the more the distance between Sensor and sensing object increases, the larger the display value becomes. However, if the display values are inverted, the more the distance increases, the smaller the dis-play value will become.
Inverting display values is not possible when two-point scaling is used.
When scaling cannot be set correctly, refer to 5-2-1 Unable to Set Scaling.
When any of the following changes is performed, the scaling func-tion is automatically cleared and must be performed again.
• Turning ON or OFF Intensity Mode.
• Enabling or disabling two-sensor operation A + B.
• Enabling or disabling two-sensor operation A − B.
POINT
Reflective Sensor Heads: FUN Mode Functions Section 3-5
46
Offsetting Display Values: One-point Scaling A
Use one-point scaling to offset the display values. Input the distance to be displayed for the current measurement point. When you input only one point for scaling, only the offset is changed without changing the range of display values. In this example, the display values are not inverted.
Example:
Example: One-point Scaling A
80.0 140.0 80.0
90.0 150.0 90.0
100.0 160.0 100.0
110.0 170.0 110.0
Sensor Head Although the Y value
must be displayed, the X value is displayed.
Y X
If X = 90 mm and Y = 150 mm,
Sensing object
Measured value = Display value Display value Measured value
: Scaling value input 90 mm is displayed as 150 mm.
Display value (mm)
150.0
90.0
90.0 Actual distance (mm) Despite the offset, the range
remains unchanged.
Reflective Sensor Heads: FUN Mode Functions Section 3-5
47
Displaying the Height of the Sensing Object: One-point Scaling B The height of the sensing object can be displayed by using one-point scal-ing and invertscal-ing the display values.
When the display values are inverted, the larger the displacement, the smaller the display value. Therefore, the height of the sensing object can be displayed after inputting the height of a known sensing object.
Because one-point scaling is used, the range of display values is not changed. The linear output also remains unchanged.
Example:
Example: One-point Scaling B
100.0 80.0 100.0
110.0 70.0 110.0
120.0 60.0 120.0
130.0 50.0 130.0
Sensor Head
X
Y
Although the Y value must be displayed, the
X value is displayed.
If X = 110 mm and Y = 70 mm,
Measured value = Display value Display value Measured value
: Scaling value input 110 mm is displayed as 70 mm
and the display values are inverted.
Display value (mm)
110.0
70.0
110.0 Actual distance (mm)
Even though the display values are offset and inverted, the range of display values remains
unchanged.
Sensing object
All display values are offset and inverted.
Reflective Sensor Heads: FUN Mode Functions Section 3-5
48
Correcting Display Values to Match Actual Distances: Two-point Scaling A Display values can be corrected if there is a discrepancy between the actual distance from the Sensor Head to the sensing object and the value displayed on the Amplifier Unit. When actual distances are known, they are input at two points to correct the range and offset of display values (see fol-lowing figure).
To change only the offset without changing the range of display values, refer to Offsetting Display Values: One-point Scaling A.
Example:
Example: Two-point Scaling A
90.0 92.0 90.0 90.0 92.0
100.0 100.5 100.0 100.0 100.5
110.0 109.0 110.0 110.0 109.0
120.0 118.5 120.0 120.0 118.5
Sensor Head
Instead of the actual distance of 90.0 mm, 92.0 mm is displayed.
Slide gauge
Sensing object
In addition, instead of the actual distance of 120.0 mm,118.5 mm is displayed.
Measured value = Display value Actual distance Display value Measured value Actual distance
There are discrepencies between actual distances
and display values.
: Scaling value inputs
Display value
Previous value of 118.5 mm is displayed as
120.0 mm.
Previous value of 92.0 mm is displayed as 90.0 mm.
Actual distance (mm)
Reflective Sensor Heads: FUN Mode Functions Section 3-5
Reflective Sensor Heads: FUN Mode Functions Section 3-5