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LP21/LP22

Pag.

36

a

37

LP21/LP22 Installation instructions en

Sensors

9.8.9

Direction Logic

“Parking bay“

This direction logic is used where for short entrances and exits. Interference to counting due to cross traffic
on loop 1 is disabled in this logic.This logic suppresses the impairment of counting by cross traffic on loop 1.
It is therefore irrelevant whether loop 1 is laid in the adjoining lane or the manoeuvring area.

WARNING

Positioning of the loops

The positioning of

the

loops is dependent on the direction in which congestion is anticipated. No tailbacks

are permitted to occur in travel direction 1

→

2. In travel direction 2

→

1, vehicles will also be correctly

counted in congestion, and in this situation the gap between vehicles must release one loop at a time.

Fig.18: Parking bay Direction Logic

Symbol

Description

A

passageway

B

Car park

1

Loop 1

2

Loop 2

Tab.25: Symbols for parking bay

Logic for travel direction 1

→

2

•  The counting pulse is triggered as soon as both loops have been completely crossed
•  Correct counting with single vehicles
•  Correct counting also with manoeuvring
•  Congestion and queues are not permitted to occur in travel direction 1 -> 2!

Logic for travel direction 2

→

1

•  The counting pulse is triggered as soon as loop 2 is vacated in the direction of loop 1.
•  Correct counting also with cross traffic
•  Correct counting with queues
•  Correct counting also when a single vehicle is manoeuvring
•  No manoeuvring is permitted to take place in a queue!

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Содержание LP21

Страница 1: ... performed on a device or the inappropriate use of a device Improper repairs Repairs may only be performed by the manufacturer Failure to comply will endanger the safety of the device and renders the warranty null and void Permitted voltages The voltage supply must meet the requirements for safety extra low voltage Circuits and power sources of limited power SELV Regulations on electrical voltage ...

Страница 2: ...he detector may only be operated with the prescriped supply voltages Take note of the technical data before installation WARNING Protection from environmental influences The device must be installed in a location where it will not sustain damage from heat dripping water moisture or dust Incorrect use Alterations to the device and the use of spare parts and additional devices not sold or recommende...

Страница 3: ...LP21 LP22 Pag 3 a 37 LP21 LP22 Installation instructions en Sensors 3 Product overview 3 1 Housing dimensions Fig 1 LP21 LP22 side view Fig 2 LP21 LP22 front view ...

Страница 4: ...icators for the loops and the detector D DIP switch 2 LP22 variant Basic settings for the detector E USB connection Updates F Reset button Factory settings or fresh adjustment G Loop inputs orange Connections for induction loops H Output 1 terminal block Relay output 1 yellow Signal outputs for controller I Mounting bracket Mounting device for TS35 DIN rail J Output 2 terminal block Relay output 2...

Страница 5: ...tted operating temperature 37 70 C permissible storage temperature 40 85 C relative humidity 95 non condensing Loop properties max inductivity range 20 700 H see note 1 recommended inductivity range 100 300 H operating frequency 30 130 kHz cable length 200 m internal resistance 20 Ω including cable min insulation resistance to earth 100 kΩ constant including cable insulation voltage loop inputs 1 ...

Страница 6: ...h LED status indicator 1 x blue and 1 x red per loop channel Reset button Push button PC interface USB port type mini AB Tab 2 Specifications NOTE 1 Limitations on loop inductance For loop inductances outside the recommended range only one frequency level may be available For very small loop inductances the maximum loop resistances are lower 2 Current load of the relay contacts The rigid gold plat...

Страница 7: ... parking and tunnel monitoring as well as traffic light systems 4 1 Product versions The Traffic detector is available in the following versions Product name Features LP21 1 CHANNEL 1 Channel for one induction loop 2 Relay outputs 8 pole DIP switch for configuration USB diagnostic interface Reset button 24 V supply voltage Top hat rail mounting Plastic housing LP22 2 CHANNEL 2 Channels for two ind...

Страница 8: ...tinuous adjustment of frequency drifts to suppress environmental influences Sensitivity independent of loop inductance Fixed hold times regardless of the loop coverage Direction detection based on two loop channels LP22 Multiplexing prevents mutual interferences of the loop channels LP22 Compact plastic housing for mounting on DIN rail in control cabinet 4 3 Product functions The traffic detectors...

Страница 9: ...has been interrupted for at least 0 5 seconds Alignment takes around one second if no vehicles drive over the loop in this time External influences on the loop frequency may result in longer alignment times and their causes must be determined and eliminated 4 3 4 Scanning of the loop channels The dual channel traffic detector LP22 can evaluate two loop channels The timed scanning of the loops is c...

Страница 10: ...echnical data and safety instructions The power supply is connected to the blue terminal block VCC Plus GND Ground Fig 3 Power supply connection blue 5 2 Loop inputs Up to two analogue inputs for the induction loops on the terminal block are located on the underside of the traffic detector The terminal block is either 2 pole or 4 pole depending on the product variant The induction loops are connec...

Страница 11: ...ersa This happens by switching between open circuit and closed circuit principle Loop malfunctions can also be interpreted as loop covered or as loop free Status Normally closed contact NC Normally open contact NO Not inverted open circuit principle Inverted closed circuit principle Not inverted open circuit principle Inverted closed circuit principle Power supply off Detector ready loop free Loop...

Страница 12: ...n find illustrations and technical data on the housing and connections in the sections at the beginning of this document 6 1 Assembly on the DIN rail TS35 Prerequisites Assembly conditions Tools none Mounting device DIN rail TS35 top hat rail Fixing to the top hat rail 1 Place on the device from above with the groove on the top hat rail and lock the clip underneath 2 Check that it is sitting secur...

Страница 13: ...safety instructions and take the appropriate precautions 2 If necessary pull the terminal block out of the socket 3 Loosen the screws on the blue terminal block 4 Insert up to 5 mm of stripped supply cable into the slots at the side of the blue terminal block and fix 5 Tighten the respective screw 6 If necessary insert the terminal block back into the blue 2 pole socket The supply cable is firmly ...

Страница 14: ...4 Insert up to 5 mm of stripped cable into the slot on the side of the terminal block and fasten 5 Tighten the screw 6 If necessary insert the terminal block back into the red or yellow 3 pole socket The cables of the relay outputs are firmly attached to the terminal block with no exposed wires Connect the relay cable to the external device 1 Comply with the warning and safety instructions for the...

Страница 15: ...ly be realised in squares or at right angles If it is not possible to use finished loops they should be installed in a groove cut in the road surface as shown in the figure below The loop cable must be fixed well in the groove Then fill the groove with sealing compound The corners should have a 45 angle to avoid damage to the cable insulation Fig 7 Installing the loops When installing the cable co...

Страница 16: ... slotted screwdriver width 2 3 mm Induction loops for the respective area of application Connecting the induction loops 1 Follow the warning and safety instructions and take the appropriate precautions 2 If necessary pull the orange terminal block out of the socket 3 Loosen the screws on the blue terminal block 4 Insert up to 5 mm of stripped cable into the slot on the side of the terminal block a...

Страница 17: ... commission the system Commissioning the detector 1 Define the settings with the DIP switches 2 Switch on the power supply to the detector The LP21 LP22 series detectors automatically run a test of the induction loops as well as a frequency alignment The detector is ready for operation when the blue LEDs are continuously lit There is more information in the chapter on LED indicators 3 Start up all...

Страница 18: ...d the detector There are two LEDs for each loop channel The red LED indicates the coverage status of the respective loop The blue LED indicates the operating status of the detector Red LED Blue LED Description of status No power supply detector inactive Detector ready loop connected no object detected Detector ready loop connected object detected No loop connected loop break loop closure 1 Hz Read...

Страница 19: ...ulse signal on output 2 Output signal inversion Reversing the switching logic for the output signals inversion Direction detection Switching between presence and direction detection for both outputs 2 channel variant LP22 Direction logic Evaluation logic of the direction of travel when loop is covered according to the specific application read the operating instructions Tab 7 Description of the se...

Страница 20: ...e b ON Sense a OFF 0 04 Sense b ON Sense a ON 0 16 Sense b OFF Sense a OFF 0 64 low Sense b OFF Frequency OFF low ON high Hold time OFF 5 minutes ON Infinite Output 2 OFF Pulse signal ON Continuous signal Edge 2 OFF on entering ON on leaving Inv Out 1 OFF Output inverted ON Output not inverted Inv Out 2 OFF Output not inverted ON Output inverted Tab 9 Settings via DIP switch LP21 ...

Страница 21: ...ty 2 Sense 1b Loop 1 sensitivity 3 Sense 2a Loop 2 sensitivity 4 Sense 2b Loop 2 sensitivity 5 Frequency Frequency level 6 Hold time Hold time until readjustment 7 Output 2 Output signal 2 mode 8 Edge 2 Time output signal 2 Tab 10 DIP switch 1 occupancy standard DIP2 Label Function 1 Dir Mode Direction detection 2 Dir Logic Direction logic 3 Inv Out 1 Output signal 1 inversion 4 Inv Out 2 Output s...

Страница 22: ... ON 0 16 Sense 1b 2b OFF Sense 1a 2a OFF 0 64 low Sense 1b 2b OFF Frequency OFF low ON high Hold time OFF 5 minutes ON Infinite Output 2 OFF Continuous signal ON Pulse signal Edge 2 OFF on entering ON on leaving Inv Out 1 OFF Output inverted ON Output not inverted Inv Out 2 OFF Output not inverted ON Output inverted Dir Mode OFF Presence ON Direction Dir Logic OFF Continuous signal 2 ON Wrong way ...

Страница 23: ...d below can be performed with the Detector Tool service program as well as with the DIP switch The DIP switch provides the key default settings Commissioning is not possible without the service program NOTE In order to reset to factory settings hold the reset button down for 5 seconds Key to tables DIP Information in this column shows the settings options for the DIP switch NOTE Information in thi...

Страница 24: ...ch on thresholds of over 640 and fine tuning may not be required for differentiation between vehicles It is possible to differentiate for example buses with large loops e g 10 0 m x 2 5 m and correspondingly high threshold values 1000 NOTE Minimising interference factors In order to minimise interference factors the sensitivity should be as low as possible i e the value of the switch on threshold ...

Страница 25: ...uency spacing of at least 5 kHz must be maintained Loop frequency indicator The operating frequency of the loops after switching on or changes is reflected with an LED flash sequence Multiplexing No coupling between the loops of a detector takes place through multiplexing 2 channel version The loops on a detector may therefore operate on the same frequency NOTE Loop inductivity range In the event ...

Страница 26: ...e the vehicle parking on the loop automatically once the hold time has ended The loop can then be reused for subsequent vehicles Permanent activation caused by faults can also be avoided by setting the hold time appropriately DIP hold time Hold time ON infinite OFF 5 min Tab 16 Hold time settings LP21 LP22 9 4 Setting output mode signal type Various output modes signal types can be set for the out...

Страница 27: ...trolling signal behaviour The factory settings are specified in the short instructions and on the housing DIP inv out 1 DIP inv out 2 Signal behaviour ON ON Signal output is not inverted OFF OFF Signal output is inverted Tab 18 Inversion of output signal 9 6 Setting output switching time impulse time The switching time for the outputs can be defined in impulse signal mode NOTE Set impulse duration...

Страница 28: ... direction B Loop 2 1 L1 L2 Loop 1 or 2 Out A Out B Signal output direction A or B LM Logic module LOC Loop coverage counter DLC Direction logic counter Tab 20 Key to symbols Direction logic system With all the logics the first loop covered determines the direction of counting or of travel If loop 1 is covered first the signal output and counting is done for direction A see chapter 9 8 Setting dir...

Страница 29: ...g Loop 1 Leaving Loop 1 Output signal in opposite direction only occurs again if both loops were previously free DB Continuous signal both Leaving Loop 2 D2 Continuous signal 2 Covering Loop 2 F1 Wrong way driver 1 Covering Loop 2 Pulse output with minimum signal duration default 200 ms Correct behaviour in the case of queues and manoeuvring Different behaviour in wrong way driver situation F2 Wro...

Страница 30: ...s for this setting Pulse signal travel direction A Pulse signal travel direction B Continuous signal Loop free Loop covered Tab 24 Key to direction logic You can find information on the detailed functions for different traffic situations in the following section 9 8 1 Single vehicle direction logic Fig 10 Single vehicle direction logic ...

Страница 31: ...1 LP22 Pag 31 a 37 LP21 LP22 Installation instructions en Sensors 9 8 2 Queue direction logic Fig 11 Queue direction logic 9 8 3 Wrong way driver 1 direction logic Fig 12 Wrong way driver 1 direction logic ...

Страница 32: ...ag 32 a 37 LP21 LP22 Installation instructions en Sensors 9 8 4 Wrong way driver 2 direction logic Fig 13 Wrong way driver 2 direction logic 9 8 5 Manoeuvring 1 direction logic Fig 14 Manoeuvring 1 direction logic ...

Страница 33: ...LP21 LP22 Pag 33 a 37 LP21 LP22 Installation instructions en Sensors 9 8 6 Manoeuvring 2 direction logic Fig 15 Manoeuvring 2 direction logic ...

Страница 34: ...LP21 LP22 Pag 34 a 37 LP21 LP22 Installation instructions en Sensors 9 8 7 Wrong way driver in queue direction logic Fig 16 Wrong way driver in queue direction logic ...

Страница 35: ...instructions en Sensors 9 8 8 Direction Logic Cross traffic Fig 17 Cross traffic direction logic NOTE False counts All logics except logic PB in direction 1 deliver false counts in this traffic situation because they count entries instead of exits ...

Страница 36: ... 2 1 vehicles will also be correctly counted in congestion and in this situation the gap between vehicles must release one loop at a time Fig 18 Parking bay Direction Logic Symbol Description A passageway B Car park 1 Loop 1 2 Loop 2 Tab 25 Symbols for parking bay Logic for travel direction 1 2 The counting pulse is triggered as soon as both loops have been completely crossed Correct counting with...

Страница 37: ...e detector 1 Switch off all components of the system observe the manufacturer s instructions 2 Switch off the power supply to the detector 3 Check that there is no voltage to any of the supply cables The detector can be detached 4 Carefully press down the mounting bracket with the screwdriver and pull the detector off the DIN rail 5 Pull the terminal blocks out of the input and output sockets The ...

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