Keyence LS-7000 Manual de usuario Pagina 70
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4-18
Chapter 4 Function Settings
4
Change of Edge Detection Threshold
The following section provides information on how to make threshold changes for the
measurement of highly transparent objects.
Transparent
tape
Threshold
(50%)
50% threshold
Position Position
Optical
reception
Brighter
Darker
Optical reception
Brighter
Darker
Light blocked
by tape
Measuring range
Detection impossible
Threshold
(80%)
80% threshold
Detection
possible
When measuring a highly transparent
target, such as a plastic tape, the
amount of light blocked by the tape is
minimal. Therefore, the tape may not be
detected if the threshold is low.
In that case, increase the threshold level
so that the tape will be detected
Setting Range
The threshold can be set between 10% and 99% in 1% increments.
Note: • Only a single threshold can be set for each measuring head.
• In the measurement using the window edge such as T-EDGE or B-EDGE,
the measurement may become unstable with a higher threshold. In such a
case, use the reference edge or edge 0.
■ Optical Reception Waveform Output
While making a threshold setting for the target in the measuring area, an oscilloscope
can be used to output the optical reception waveform of the target so that the threshold
can be adjusted while monitoring the waveform.
Threshold level
(OUT2 analog output on terminal 23)
Optical reception waveform
(OUT1 analog output on terminal 22)
Approx. 450 ms
Approx.
10 ms
10V
Approx. 6.5 V
0V
Trigger pulse
- LS-7000 Series 1
- General precautions 2
- Safety Precautions 3
- ■ Precautions for LED 5
- Ferrite core 6
- OP-31973 6
- About this Manual 7
- Optimum Measurement Methods 8
- Configuration of Manual 9
- LS-7001 Operation Map 10
- Hold function (See page 3-5) 11
- Contents 12
- Chapter 4 Function Settings 13
- Chapter 7 RS-232C 14
- Chapter 8 Specifications 14
- Chapter 9 Troubleshooting 14
- Appendix 14
- Chapter 1 15
- ■ Special Features 16
- ■ Principle of Measurement 16
- System Applications 17
- Package Checks 18
- Chapter 1 Getting Started 19
- Functions and Nomenclature 21
- ■ Control Panel 22
- Mounting and Connection 25
- 2 Mount the measuring head 26
- Mounting the Controller 27
- ■ Mounting to Panel 28
- Connection 31
- ■ Transmitter and Receiver 32
- ■ Power Supply Cable 32
- Supply Stand On and Off 33
- Measurement and 33
- Chapter 2 37
- Set value 38
- Measurement of Pitch 44
- Chapter 3 45
- Chapter 3 Operation Control 46
- Chapter 3 Operation Control 47
- Area Monitor 48
- Hold Function 49
- Automatic Zero Function 50
- Panel Lock Function 51
- Program Changes 52
- Chapter 4 53
- Flow of Program Settings 54
- External I/O 55
- Output Settings 55
- Measuring Mode Settings 55
- Option Settings 55
- ■ Program Initialization 58
- (See page 4-15) 60
- (See page 4-16) 60
- (See page 4-17) 60
- (See page 4-18) 60
- (See page 4-14) 60
- Area Selection 61
- ■ SEG (Segment) 62
- ■ Setting Procedure 64
- DIA (Diameter) 65
- T-EDGE (Top edge) 65
- B-EDGE (Bottom edge) 65
- SEG (Segment) 65
- 6 Press the 69
- Calibration Settings 72
- 5 Press the 77
- Measuring mode 85
- Analog Output Settings 96
- ■ Analog update mode 98
- Comparator Output Setting 99
- (Normally open) 100
- (Normally closed) 100
- 1 Press the 101
- 2 Press the 101
- 4 Press the 101
- Tolerance (LIMIT) Settings 102
- Limit Settings 103
- Hold Value Elimination 104
- 1 Continue pressing the 105
- Chapter 4 Function Settings 107
- 3 Press the 108
- Display Unit 109
- I/O Mode 111
- Chapter 5 115
- Possible Environment Settings 116
- This part changes 118
- ■ Resetting All Programs 120
- ■ RS-232C Settings 121
- ■ Baud Rate 121
- ■ Parity 121
- ■ Stop Bit 122
- ■ Data Length 122
- ■ Data Mode 122
- ■ Data Transmission Mode 123
- The buzzer turns ON 126
- The buzzer turns OFF 126
- Chapter 6 129
- Connector I/O 130
- Terminal block 130
- Chapter 6 I/O Terminals 131
- Chapter 6 I/O Terminals 134
- ZERO Input 6-3, 6-5, 6-6 135
- ■ FUNCTION Output 136
- Electrical Specifications 137
- ■ NPN Open Collector Output 2 138
- ■ Analog Voltage Output 138
- Timing Chart 139
- ■ Sample Hold 2 140
- ■ Self-timing Hold 140
- ■ BCD Output Switching 141
- ■ Minimum Input Period 142
- Chapter 7 143
- Specifications 144
- ■ RS-232C Connection Settings 145
- ■ Environment Settings 146
- Connecting to KV Series 147
- Outline of Command Formats 148
- Measurement Serial Commands 149
- Commands in Detail 150
- ■ Measured Value Output 150
- Chapter 7 RS-232C 151
- Response 153
- Setup Serial Commands 154
- ■ Area Check 156
- ■ Calculation 156
- ■ Average 156
- (Page 7-15) 161
- Batch Commands 162
- ASCII Table 164
- ■ Output 165
- TIMING input 166
- Sampling period + 3.5 ms 166
- RS-232C data output 166
- Chapter 8 167
- Measuring Head 169
- Optional Accessories 169
- Characteristics 170
- Temperature Characteristics 171
- ■ Measurement Response Time 172
- Mode Specifications 173
- External Dimensions 174
- ■ LS-7030 Measuring Head 175
- ■ LS-7070 Measuring Head 175
- ■ Extension Cable 176
- Chapter 9 177
- Troubleshooting Guide 178
- Chapter 9 Troubleshooting 179
- 2 Continue pressing the 182
- Appendix-2 183
- Appendix-3 183
- Appendix-5 183
- Setting Record Sheet 185
- Threshold 186
- WARRANTIES AND DISCLAIMERS 191
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