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

Contents
Loop Detector Application Notes SLD4
667/HQ/45200/101
3
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
4
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
5
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
6
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.
1
For UK this refers to Electricity at Work Regulations 1989.
2
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
7
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
8
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
NC
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
9
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
1
1
1
1
LK4
LK5
LK1
PRESENCE MODE/FREQ
IR Downlink
IR Uplink

General Setup
Loop Detector Application Notes SLD4
667/HQ/45200/101
10
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
1-2, 3-4
20-150uH
2
2-3, 4-5
150uH-300uH
3
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.