Siemens SLD4 Supplement

667/HQ/45200/101

SLD4

Loop Detector Application

Notes

Feb-20

Issue 3

Contents 
 
 
 
 
Loop Detector Application Notes SLD4 
667/HQ/45200/101 

 
Contents 
Contents 2 
List of Figures 4 
List of Tables 5 
Health and Safety Protection 6 
Handling Precautions 7 
Introduction 8 
1. Purpose 8 
2. Document References 8 
3. Key Terms and Abbreviations 8 
General Setup 9 
1. SLD4 Loop Inductance Link Settings 9 
2. SLD4 Sensitivity 10 
Bus Detection 11 
1. Loop Type for Bus Applications 11 
2. Basic Setup of Detector 11 
3. Advanced Configuration Setting 12 
3.1. Bus Detection Threshold Setting Process 12 
4. Additional Options 15 
Tram Detection Applications 16 
1. Tram Detection Applications 16 
2. Basic Setup of Detector 16 
3. Advanced Tram Configuration Setting 16 
3.1. Gapping 16 
3.2. Sticking On 17 
Rail Crossing Applications 18 
This section is concerned with vehicle approaches to rail crossings. 18 
1. Rail Crossing Applications 18 
2. Basic Setup of Detector 18 
3. Advanced Rail Crossing Configuration Settings 18 
4. Confirmation of Performance 21 
5. Putting the loop detector into operation 22 
Bicycle Detection 23 

Contents

Loop Detector Application Notes SLD4

667/HQ/45200/101

6.1. Loop Type for Bicycle Detection Applications 23

6.2. Basic Setup of detector 24

6.3. Advanced Bicycle Configuration Setting 24

7. Classification Setup 25

7.1. Basic Classification Settings 25

7.2. General Vehicle Classification Configuration 25

7.3. Single Loop and Double Loop 26

7.3.1. Mapped Classification 27

8. Parking Bay Applications 33

8.1. Parking Bay Monitoring (typically used for EV Chargers) 33

8.2. Presence Time (bay occupation time) 33

8.3. Adjacent Bay Detection 33

9. Troubleshooting 34

9.1. Refreshing SLD4 Configurator Setup 34

9.2. Serial Cable connection (702/4/08535/000) 34

List of Figures

Loop Detector Application Notes SLD4

667/HQ/45200/101

List of Figures

Figure 1: Links for sensitivity (two per loop) 9

Figure 2 : Reading the SLD4 Configuration 12

Figure 3 : Setting Configuration 13

Figure 4 : Setting Loop Mode 14

Figure 5 : Evaluating Loop Settings Using data Capture 15

Figure 6 : Reading the estimated inductance values 19

Figure 7 : Vehicle Records (German language settings) 20

Figure 8 : Vehicle Profile 20

Figure 9 : Loop Sensitivity Settings (%DL/L and [Hz] are site dependent) 21

Figure 10 : New Vehicle Profile with New Threshold 21

Figure 11 : Disconnecting the Serial COM Interface 22

Figure 12 : Example Loop Dimensions for Bicycle Detection 23

Figure 13 : General Vehicle Loop Configuration 25

Figure 14 : Loop Frequency 26

Figure 15 : Loop Status 26

Figure 16 : Location of Classification Settings 27

Figure 17 : Classification Mode Selection (General Tab) 27

Figure 18 : Classification Bin Configuration 28

Figure 19 : Example 1 Classification bin configuration 29

Figure 20 : Digital output configuration Example 1 Mapping 30

Figure 21 : Example 2 Classification bin configuration 31

Figure 22 : Digital output configuration for Example 2 32

Figure 23 : Presence Time (s) Settings 33

Figure 24 : SLD4 Configuration Tool –Creating a New Configuration 34

List of Tables

Loop Detector Application Notes SLD4

667/HQ/45200/101

List of Tables

Table 1 : External Document References 8

Table 2 : Terms and Abbreviations 8

Table 3 : Link and Switch Function 10

Table 4 : Inductance Jumper Settings for Detection 10

Table 5 : Suggested Bus Detection Settings 12

Introduction

Loop Detector Application Notes SLD4

667/HQ/45200/101

Health and Safety Protection

Installation and Maintenance Personnel

In the interests of health and safety; when installing, using or servicing this equipment the

following instructions must be noted and adhered to:

1Only skilled or instructed personnel, with relevant technical knowledge and experience, who

are also familiar with the safety procedures required when dealing with modern electri-

cal/electronic equipment, are to be allowed to use and/or work on this equipment. All work

shall be performed in accordance with the local regulations1,2.

2Such personnel must take heed of all relevant notes, cautions and warnings in this Hand-

book and any other Document or Handbook associated with the equipment including, but

not restricted to, the following:

i. The equipment must be correctly connected to the specified incoming power supply.

ii. Only trained / competent persons should work on this equipment.

iii. Any power tools must be regularly inspected and tested.

iv. Any personnel working on site must wear the appropriate protective clothing, e.g. reflec-

tive vests, etc.

Road Users

It is important that all personnel are aware of the dangers to road users that could arise during

repair and maintenance of traffic control equipment.

Ensure that the junction area is coned and signed as necessary to warn motorists and pedestri-

ans of any dangers and to help protect the personnel working on the site.

For UK this refers to Electricity at Work Regulations 1989.

For DE this refers to GV A3, DIN EN 50110-1 (VDE 0105-1) and VDE 0832 and the work-safety leaflet

ASM 0099-01

Introduction

Loop Detector Application Notes SLD4

667/HQ/45200/101

Handling Precautions

Handling

1. Take care when handling these modules as they can be easily damaged.

2. Always observe anti-static precautions.

Damage through electric fields or electrostatic discharge

Electric fields or electrostatic discharge can cause malfunctions through damaged individual

components, integrated circuits, modules or devices.

3. Only pack, store, transport electronic components, modules or devices in their

original packaging or in other suitable materials, e.g. conductive foam or anti-static

bags.

4. Ensure that the user is discharged prior to handling any modules. This can be achieved

by touching an earthed surface such as a control cabinet, for example.

Introduction

Loop Detector Application Notes SLD4

667/HQ/45200/101

1. Introduction

1.1. Purpose

These application notes provide additional guidance, to that provided in the SLD4 User Manual

(667/HB/45200/000), for a range of specific applications such as bike, bus and tram detection.

1.2. Document References

External Document References

667/HB/45200/000

SLD4 User Manual

667/HE/20663/000

Loop detector and cable terminations installation and commissioning

handbook (UK)

667/HE/20664/000

Installation and Testing (General)

667/HE/31699/000

Loop Inductance Calculator

667/HQ/45200/000

SLD4 Users Quick Start Guide

667/HQ/45200/001

SLD4 Intelligent Detector Backplane Quick Start Guide

667/TZ/45216/000

SLD4 configuration tool software

Table 1 : External Document References

1.3. Key Terms and Abbreviations

Key Terms and Abbreviations

BMS

Business Management System (Siemens Electronic Document Storage Tool for Pro-

cess Documents)

DIP

Dual In-Line Package

LED

Light Emitting Diode

MOL

Mobility

N/A

Not Applicable

No Connection

PCB

Printed Circuit Board

ITS

Intelligent Transportation Systems (Mobility)

Table 2 : Terms and Abbreviations

General Setup

Loop Detector Application Notes SLD4

667/HQ/45200/101

2. General Setup

In most cases, the use of the ‘Configuration Tool’ is necessary in order to get the optimum

settings of the SLD4 for these application types.

To communicate with the SLD4 then the following items will be required:

5. Laptop PC or LRT Netbook

6. PC based “SLD4 configuration Tool” 667/TZ/45216/000

7. USB cable interface 702/4/08535/000

AC Supplies

When using 24 AC supply to the detector, only use battery powered interface equipment (e.g.

laptop, PDA). Do not connect mains powered/connected interface equipment to the SLD4. Fail-

ure to observe these precautions may damage the detector and/or the connected device

2.1. SLD4 Loop Inductance Link Settings

The links for loop sensitivity are shown below (PL3, PL4, PL5, PL6):-

Figure 1: Links for sensitivity (two per loop)

PL3

PL4

PL5

PL6

LK4

LK5

LK1

PRESENCE MODE/FREQ

IR Downlink

IR Uplink

General Setup

Loop Detector Application Notes SLD4

667/HQ/45200/101

Link Function

Link

Function

PL3

Loop 1 inductance setup links

PL4

Loop 2 inductance setup links

PL5

Loop 3 inductance setup links

PL6

Loop 4 inductance setup links

Table 3 : Link and Switch Function

Sensitivity Settings

Range

Jumper Setting

Inductance Range

1-2, 3-4

20-150uH

2-3, 4-5

150uH-300uH

1-2 ,4-5

260uH-2000uH

Table 4 : Inductance Jumper Settings for Detection

Note

In practice inductance ranges overlap so it is possible to use a lower range in some circum-

stances. This may give better performance, particularly for bicycle detection.

2.2. SLD4 Sensitivity

The detector threshold may either be set in “Hz” or as a percentage of loop inductance

change (%ΔL/L ). Which you use only depends upon which is most convenient for the applica-

tion. In general, it is recommended that “Hz” mode is used for large vehicles (tram, bus), as

this provides easier value adjustment for large vehicles. The value is a whole number in the

thousands range, for an inductance change it would be a two decimal place number.

The “Hz” setting is slightly dependent upon frequency, so if you change the loop frequency

then the sensitivity in “Hz” may need to be changed higher or lower in proportion to the loop

frequency change. This is the disadvantage of using the “Hz” setting mode.

Detector Variant Differences

The standard SLD4 detector supports only “Bicycle” mode whereas the remaining modes re-

quires an enhanced SLD4 detector.

Table of contents

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