Street Lighting Control System- SLC 2.

Features

Type of used LEDs.	Led 35R 241 -40W 3300Lm Rommtech 3S (BG) Led 60R 2x241 -80W 6600Lm Rommtech 3S (BG)
Number of LED lamps into one street lighting WLAN.	1-100
Number of WLANs supported by SLC 2.	1-255
Number of Coordinators in one WLAN.	1
Number of Routers in one WLAN.	1-100, by one for each LED lamp.
Used interface and stack of WLAN.	2.44 MHz, JenNet/JenNet IP6/802-15.
Type of the communications into WLAN.	Routing of the messages between the Routers and Coordinator.
WLAN topology.	Tree topology with program control of it structure.
Maximal distance between two neighbour lamps in WLAN.	80 m. (60 m nominally).
WLAN data traffic speed.	250 Kb/s
LED lamps control.	Into each of LED lamps is embedded one Router, working as WLAN device and LEDs controller. The last controls the lighting using PWM (10-90%). Additionally is monitoring and controlling of the voltage, lamp face temperature and others lamp parameters.
Technological program language for LED lamps control.	Program control language, having 52 types of instructions is used for programming of individual and group LED lamp work applications. The language instructions are generating from Coordinator and sending to the Routers for execution. After each execution the Routers return report to the Coordinator. The last is resending these reports to the Operation station connected to him. If the Coordinator isn’t connected to any station, it doesn’t resend the messages but continues to communicate with WLAN Routers.
Monitoring of WLAN and LED lamp parameters.	The Routers forms periodically messages of the states of their LED lamps. These messages are routing on the WLAN and receiving from Coordinator. The last is sending they by USB to local operation station (LOS) or by GPRS to the server into Main Operation Station (MOS), where they are monitoring and saving into the archive.
Autonomous mode of working of the Street Lighting WLAN.	When the Coordinator is disconnected logically or physically from the operation stations, it has ability to control the WLAN in autonomous mode. This is the case when it has in his eeprom memory saved recipe program, sent before disconnecting. This program determinates the working modes of LED lamps. It is cyclic and is active each day to the next connection, reloading or removing. After connection to any operation station, the Coordinator recipe can be change.
Control of switching of power supply of Street Lighting WLAN.	The switching of power supply of the Street Lighting WLAN is controlling by the WLAN Coordinator. It is every time supplied. When it is in autonomous mode and has saved recipe, the recipe determinates when to be switched “on” or “off” of WLAN power supply. This is doing by contactor controlled by Coordinator. At the moment of activating of power supply, the Coordinator is starting building of WLAN, searching for its LED lamp Routers. Each WLAN has unique address -number and the recipes generated in the operation stations are indexed (into recipe DTBS) by this number.
Control by USB.	The Coordinator of WLAN has embedded USB. By it is possible direct connection of LOS to WLAN and full control of concrete Street Lighting line.
Measuring of the consummation of LED lamp WLAN.	The Coordinator makes periodically measurements of electrical consummation of Street Lighting line. After measurements it sends corresponded messages to operation station connected to it. For measurement the Coordinator uses special energy meter, connected by RS 485.
Operation stations.	There are designed two types operation stations- MOS (Main Operation Station) and LOS(Local Operation Station). The second of them is purpose for individual control of Street Light Control WLAN, using USB Coordinator connection. First (MOS) controls groups of WLANs and functioning as control centre. It uses Internet TCP for connection to the Coordinator of WLANs. Each of Coordinators has embedded GPRS modem and makes an attempt each 3 minutes to connect to MOS. If this action is successful it creates socket for communication with MOS. When MOS has received a request for connection it has ability for enable this connection or cancel it. The solution is making based on selected from operator address-number of WLAN. If the request is enabled MOS begins communication session with the Coordinator of WLAN and direct control on this network. If the request was cancelled Coordinator tries to connect with MOS after interval of 3 minutes.
Crypting.	SLC2 uses three levels of information crypting: - The messages into WLAN are protected with 128 bits switch, using AES. - The messages between MOS and Coordinator of WLAN are protected with 64 bits switch, using DES. - The messages between MOS and Remote Computer are protected by standard protect mechanism.
Remote control.	SLC2 offers an option of remote control from external Internet computer. In MOS is embedded server accessed from external client with corresponded rights. The Client has ability to select address number of the WLAN, program recipe for this WLAN for autonomous mode of working, monitor the messages of WLAN for time interval and close his connection. During connection time MOS functions as gateway between the remote client and WLAN.

Fig.1. Architecture of Street Light Control System SLC-2.

Fig.2. Light Street Control LAN Coordinator

COORDINATOR FEATURES:

COMMUNICATOR:

Processor	JN5168-001 32 bits, 32 MHz, RISC
Interfaces	RS232C/GPRS( TCP ) USB 2.0 Wireless LAN SPI SPI0 - with integrated 128 KB FLASH SPI1 – internal unit SPI2 – with 64MB onboard FLASH
Timers	3 16 bits programmable timers 24 bits programmable timer
Memory	128 KB fast memory RAM 128 KB self-contained FLASH 64MB self-contained FLASH
Accessories	Integrated in communication infrastructure modules (2.4 GHz) GPRS\TCP modem SIM900
Power supply	5V DC
Accessories	Integrated in communication infrastructure modules (2.4 GHz) GPRS\TCP modem SIM900

PROCESS UNIT:

Processor	ATXmega32A4 8/16 bits, 32 MHz, RISC
Interfaces	RS485 ( RS485+) Wireless 433MHz LAN (SIM20) Wire Bus (2 Independent highways to access remote sensors for measurement of temperature and humidity)
Timers	2 16 bits programmable timers
Relay outputs	5 pieces for external circuits control (~220V)
Accessories	unit 1-wire bus thermometer  DS1823 unit 1-wire bus smart sensor for measuring temperature, humidity and 5 opto uncoupled digital inputs. 1-wire bus clock-calendar ds1921. Electrical Power Meter of street line consummation (connected to Coordinator by RS485). Contactor for switching of the street lighting line current.
Power supply	12-24V DC ( supplies also the Communicator ).

Fig. 3 Graphical User Interface of MOS.

Advantages of used LED LAMPS