Questions tagged [dali]

DALI (Digital Addressable Lighting Interface) is a lighting industry specific protocol between control devices (controllers) and control gear (ballasts) formally specified by IEC62386.

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69 views

Trouble understanding overvoltage protection circuit

I am working on a DALI circuit and came across this app note. App note gives a schematic which is supposed to protect the circuit in case someone connects 220 VAC wires to the DALI lines. Schematic ...
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3answers
72 views

DALI Commissioning reduction

Is there any way I can reduce the DALI commissioning? I have an Occupancy sensor, photo sensor and a switch which are DALI devices. So every time when I turn on the device it goes for commissioning ...
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88 views

Need help understanding DALI circuit and 220 VAC protection

I am making a circuit to interface my MCU with a DALI bus. My basic circuit works and I am able to communicate on DALI bus. It looks like this: I fully understand the above circuit. After my base ...
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138 views

Understanding DALI power supply

I am working on a DALI system and I came across this schematic for the DALI power supply in a Microchip app note AN1465: It says the power line can be 12-20 Volts but the current has to be limited to ...
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40 views

Do I have to initialize Dali lamp somehow if I use broadcast commands?

I have few Dali lamps. Some of them are new, some of them are used. It is hard to tell which was initialized (addressed?) and which was not. I have simple DALI circuit with microcontroller and simple ...
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136 views

Understanding STEVAL-ILM001V1 DALI transceiver schematic + adding protections

I'm working on implementing a DALI bus interface circuit. DALI has a few specifics that make this tricky: The device should draw at most 2mA when receiving, it transmits by shorting the bus (250mA is ...
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84 views

DALI bus power supply requirements

As per standard DALI power supply should be 15 V at 250 mA. In the same time standard says that there can be up to 64 devices on the bus. So I can suppose that each DALI slave SHOULD cunsume 4 mA from ...
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73 views

DALI optical isolation of signal, but no power isolation?

The DALI standard suggests a separated power supply, because the DALI control lines are not galvanically isolated, so mains voltage may appear on the lines (and the standard suggests that DALI devices ...
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60 views

How to calculate the Short Circuit current of a small DC circuit?

I need to do a short circuit test for my DALI slave device. I have observed a maximum load of 140W at 210V-rms (Load current = 650 mA , PF = 0.975). I have to do a short circuit at the load side and I ...
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1answer
72 views

How to Update firmware of microcontroller using DALI lines of a DALI slave module?

I have developed a DALI slave module with PIC 16F18326 microcontroller. Now, I want to make a Bootloader for this PIC. But the problem is, I don't have a serial communication or USB connection with ...
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162 views

DALI Slave not responding to short address

I'm creating customized DALI Master from scratch. The problem is, that no matter what I do, none of the devices responds to short addressing. Let's start from the beginning. After connecting single ...
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2answers
260 views

Strange behavior of the DALI controlled luminaires

I faced a strange behavior of a DALI controlled LED luminaires circuit. I have 48 LED luimianires with a MeanWell ELG150-C700-DA drivers connaected according to the scheme below: I commissioned the ...
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1answer
124 views

LED driver type detection- 0-10V or DALI

I am looking for the solution which can automatically detect the driver type installed in street light luminary. There are control mechanism which controls and provides the 0-10V and DALI dimming to ...
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1answer
184 views

DALI Signal Voltage Range and Power Supply connection confusion with WAGO

In an attempt to solve this problem, I was cross-checking my connections several times. During this, I thought it will be interesting to see the DALI signal coming out of WAGO DALI Module as opposed ...
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143 views

Is the isolation necessary in this circuit?

I am designing a circuit to control LED drivers. The main characteristics are the following: The circuit is powered through the electrical network (230 VAC) It has three types of dimming outputs: 0-...
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484 views

DALI Click Board: Not clear about the board operation, usage and circuit design

I am developing a DALI Control Device using STM32 board. I have already programmed the board to send DALI Slave commands according to DALI Protocol. But I am facing problem interfacing my board with ...
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185 views

Adaptability of DALI Click Board for DALI Power Supply 18V DC, 250mA

I am developing a DALI Control Device using STM32 board. I have already programmed the board and got some basic results, now I want to test my device with industry standard DALI Control Gear. For that,...
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140 views

DALI Command's reply to the meaning of representatives

I have some control gears which already have short addresses, are connected on DALI lines. I tried to send Query Short Address (command 269)& verification Short Address (command 268), but I didn't ...
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1answer
87 views

Clarification required on DALI Standard 101,103

I want to develop a complete DALI Control Device with two important features, one being "3 DALI buses on the device" and other being the "RGB colour control feature"! Already, I have successfully ...
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96 views

How to set the group in DALI system on the bus? [closed]

When I have 6 gears on the DALI bus, how to set up a pair of two to the group by command?or another way to set? thanks!
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266 views

DALI : How commissioning process takes place in DALI system -2?

Broadcast control commands are working properly. But, I am not able to get the response from Dali Driver, for broadcast query or special commands. And also I am not able to set short address for the ...
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1answer
381 views

DALI schematic: help to analize reception circuit and limited current supply

I am trying to understand how this schematic works. It is a physical layer implementation of the DALI specification. The schematic is in this document (page 11). I have mainly two questions: In ...
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1answer
478 views

DALI specification: help to understand the physical layer schematic

I am trying to understand an NXP circuit that has implemented the physical layer of the DALI specification. In particular, it is DALI master hardware. For the transmission (page 4), it says exactly: ...
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1answer
804 views

DALI Multi-Master: How to design a multi-master system? Is it part of DALI standard?

This question is haunting me for a long time. This could be something very basic and I do not know how it works or could be some misunderstanding! I am now using STM32E407 as DALI master and am ...
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457 views

DALI Protocol: Is it valid to include this for manchester decoding convenience?

Understanding: DALI uses Async data decoding using 1 start bit and 2 stop bits. The 1 start bit is logical one (1), also encoded during Manchester encoding and the 2 stop bits(Signal is HIGH for long ...
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1k views

DALI Communication: Is DALI protocol a byte transfer mechanism or packet layer mechanism?

As per the DALI light-control standard protocol, DALI bus communication uses Asynchronous half-duplex(two-wire) serial communication. It uses Manchester coding at 1200 bits per second(baud). A DALI ...
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632 views

Issue with DALI interface circuit

I have a DALI interface board the circuit of which is shown below. This board was working so far but now the optocoupler in the circuit is not switching on DALI signals. Dali interface circuit: ...
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103 views

LED flickers below 3%

We are working on an LED dimmer circuit which supports DALI2.0 Interface. We already received the hardware and working on software only. LED driver circuit is based TPS92515HV and below is the ...
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1answer
115 views

Led dimming circuit is not able to switch off the led

We are working on an LED dimmer circuit which supports DALI2.0 Interface. We already received the hardware and working on software only. LED driver circuit is based TPS92515HV and below is the ...
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1answer
268 views

DALI DAPC OFF command

We are working on DALI LED control gear type product. We are using TPS92515 as LED driver and its controlled through Iadj pin (analog dimming). Our issue is even if we give input zero (GND) to control ...
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1answer
60 views

Light fixture dimming, LED turn of

I'm trying to dim a light fixture with the DALI protocol. It functions quite fine but when the dimming gets low two thirds of the LED:s turn of. Why is this? Is it because the voltage forward gets ...
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240 views

Do the existing/defined DALI protocol commands include color temp adjustment?

I want to know if the officially defined DALI commands entail anything related to adjusting color temperature. I understand that it specified quite a few commands in adjusting brightness, but I ...
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976 views

DALI - ARC Power Control Commands - What about them is 'ARC' related

Commands used in DALI are described as ARC Power Control. If I am Directing an LED fitting to a particular dimming level, what about the command has any relevance to an 'ARC' description. Where does ...
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672 views

DALI : How commissioning process takes place in DALI system?

I am new to DALI protocol. The setup has a master and one slave. I am using Mean Well Dali Driver. Broadcast control commands are working properly. But, I am not able to get the response from Dali ...
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127 views

How do I wire LED light based zone for DALI dimming? [closed]

I understand the concept of DALI but I’m having problems understanding how to wire a zone. Let’s say one of the sections of my living room will have 5 x 5W /350mA ...
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2k views

Can I connect various LED fixtures to one driver?

Let's say my driver is 32W (700mA). I should be easily able to connect 5 x 5W 350/700mA LEDs right? My idea is to use driver with DALI interface and control 5 LED's using just one address.
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224 views

What is the expected delay on a dali ballast from actioning a Direct Arc Power command

I am sending toggling Direct arc power commands to a LED driver. ( OFF / ON ) at an equal interval of 500mS. I am monitoring the dali bus commands with a Lunatone USB interface and I can see that the ...
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571 views

DALI: Handling multiple responses from DALI system

I designed my own DALI devices and now trying to build-up a DALI system. Since my DALI gears are based on MSP430G2553, I took advantage of code being already done for TI's DALI demonstration board. ...
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730 views

Optocoupler drives a transistor - optocoupler doesn't turn off

This is the circuit which comes from Microchip DALI example app note http://ww1.microchip.com/downloads/en/AppNotes/01465A.pdf Here's the deal. Everything works as expected, if this circuit is ...
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2answers
1k views

Use DALI interface to power the device

I work on a DALI lighting system for home usage and I design all DALI devices from scratch. In this system, also a sensor module will be implemented. Since it will draw only a negligible current (app. ...
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988 views

Current limitation of a power supply by using transistors

DALI standard limits the maximum current as 250mA. I have a 12V source that is capable of supplying more current. I implemented from one of Motorola reference design the below schematics that limits ...
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481 views

Scanning DALI control gears

I am designing a WiFi enabled DALI control device. I have some control gears which already have short addresses, are connected on DALI lines. I want to scan the control gears and store their short ...
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5k views

DALI : How commissioning process takes place in DALI system?

I have gone through various documents regarding the Commissioning in the DALI interface. But I finding it difficult to understand some of the points. So if anyone with DALI Commissioning can help me ...
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2answers
5k views

DALI error detection command

I need a help from someone who knows DALI standard well and has experience on it and knows DALI control gears' structure. I make a DALI related application and aim to detect if the connected lamp is ...