Share
VIDEOS 1 TO 50
Coinco Multi-Drop Bus (MDB) Virtual Test Box VMTB-400
Coinco Multi-Drop Bus (MDB) Virtual Test Box VMTB-400
Published: 2010/04/20
Channel: CoincoWeb
MDB Converter (MDB to Serial Converter)
MDB Converter (MDB to Serial Converter)
Published: 2015/09/03
Channel: Abrantix AG
Multi Drop Orders
Multi Drop Orders
Published: 2016/12/30
Channel: Simple Ton
Multi Drop (Part 1)
Multi Drop (Part 1)
Published: 2017/09/14
Channel: TheRockgod23
Multidrop microplate dispensers
Multidrop microplate dispensers
Published: 2016/12/21
Channel: Thermo Fisher Scientific
Fernbus Gameplay - Multi Drop
Fernbus Gameplay - Multi Drop
Published: 2016/08/23
Channel: Squirrel
MDBSlaveReader
MDBSlaveReader
Published: 2015/07/26
Channel: BonusData
PC2MDB (RS232-MDB) vending machine payment mdb interface
PC2MDB (RS232-MDB) vending machine payment mdb interface
Published: 2017/06/05
Channel: waferstar
MULTIDROP JUNIOR
MULTIDROP JUNIOR
Published: 2012/04/17
Channel: papakyriazis
Polin multi drop "Welcome"
Polin multi drop "Welcome"
Published: 2012/05/30
Channel: Panamequipment
trucker mark #29 multi dropping
trucker mark #29 multi dropping
Published: 2015/07/30
Channel: mark hickey
Polin Multidrop Classic - a depositor, dosing machine & a wire cut machine
Polin Multidrop Classic - a depositor, dosing machine & a wire cut machine
Published: 2013/02/18
Channel: RVO Enterprises
Scorpion MultiDrop Combi 2015
Scorpion MultiDrop Combi 2015
Published: 2015/07/03
Channel: John Woodford
ProBAKE Bakery Equipment - POLIN MULTIDROP COMPACT Depositor for Brownies
ProBAKE Bakery Equipment - POLIN MULTIDROP COMPACT Depositor for Brownies
Published: 2015/03/16
Channel: proBAKE Inc.
MultiDrop
MultiDrop
Published: 2017/01/05
Channel: CheezMusic
Scorpion multidrop.wmv
Scorpion multidrop.wmv
Published: 2010/03/25
Channel: John Woodford
Multidrop Probe & Sensor Wiring Instructions
Multidrop Probe & Sensor Wiring Instructions
Published: 2013/07/11
Channel: OPW Global
quickdrop/multi drop
quickdrop/multi drop
Published: 2017/07/21
Channel: clash with sk
ProBAKE Bakery Equipment - POLIN MULTIDROP CLASSIC Cookie Depositor (Part 3)
ProBAKE Bakery Equipment - POLIN MULTIDROP CLASSIC Cookie Depositor (Part 3)
Published: 2012/05/31
Channel: proBAKE Inc.
Polin Multidrop Macaron Production
Polin Multidrop Macaron Production
Published: 2013/07/30
Channel: RVO Enterprises
Fernbus Simulator - Multi Drop | Koln to Essen | Part 1
Fernbus Simulator - Multi Drop | Koln to Essen | Part 1
Published: 2016/09/16
Channel: Taff in Exile
MULTI DROP USE TEST
MULTI DROP USE TEST
Published: 2016/03/22
Channel: VOTO GLOBAL
Ode To The Multidrop
Ode To The Multidrop
Published: 2013/02/22
Channel: Richard Cambridge
Polin multidrop
Polin multidrop
Published: 2011/10/06
Channel: dennis de ruyter
Automatic dispensing of GrowDex with Thermo Scientific Multidrop
Automatic dispensing of GrowDex with Thermo Scientific Multidrop
Published: 2017/09/08
Channel: UPM - The Biofore Company
ProBAKE Bakery Equipment - POLIN MULTIDROP COMPACT for Biscotti
ProBAKE Bakery Equipment - POLIN MULTIDROP COMPACT for Biscotti
Published: 2015/03/16
Channel: proBAKE Inc.
Polin CE-46-MTR-FCC II Multidrop Cookie Depositor
Polin CE-46-MTR-FCC II Multidrop Cookie Depositor
Published: 2016/09/26
Channel: SIGMA Equipment
MDB protocol recording for vending machines and payment systems
MDB protocol recording for vending machines and payment systems
Published: 2013/06/11
Channel: Anton Kappeler
Polin Multi-Drop Depositor
Polin Multi-Drop Depositor
Published: 2011/03/07
Channel: johnunionphotos
Multidrop exhibition live demo
Multidrop exhibition live demo
Published: 2016/02/26
Channel: F&B Equipment Sdn Bhd
kssmahass playing multi drop game
kssmahass playing multi drop game
Published: 2009/07/18
Channel: xthypere209x
POLIN MULTIDROP JUNIOR - Cookie Dropper - Subabake
POLIN MULTIDROP JUNIOR - Cookie Dropper - Subabake
Published: 2016/07/11
Channel: Suba India
Multidrop Combi & Multi-reagent Valve stand alone
Multidrop Combi & Multi-reagent Valve stand alone
Published: 2012/04/25
Channel: RapidStak microplate stacker
ProBAKE Bakery Equipment - POLIN MULTIDROP COMPACT for Small Biscotti
ProBAKE Bakery Equipment - POLIN MULTIDROP COMPACT for Small Biscotti
Published: 2015/03/16
Channel: proBAKE Inc.
C7253 Polin CE 46 MTR FCC II Multidrop Cookie Depositor SIGMA Equipment.
C7253 Polin CE 46 MTR FCC II Multidrop Cookie Depositor SIGMA Equipment.
Published: 2017/08/04
Channel: SIGMA Equipment
K2T - Candy [Multidrop Premiere]
K2T - Candy [Multidrop Premiere]
Published: 2017/08/18
Channel: Multidrop Records
trucker mark multi dropping around the south coast
trucker mark multi dropping around the south coast
Published: 2015/04/23
Channel: mark hickey
EzLink Vending Machine
EzLink Vending Machine
Published: 2010/03/29
Channel: Ho Yeong Cherng
Polin Multidrop MD 393 Tipo "C" II
Polin Multidrop MD 393 Tipo "C" II
Published: 2011/11/10
Channel: docmeat
Polin Multidrop depositor
Polin Multidrop depositor
Published: 2014/09/11
Channel: UnionMachinery100
RapidStak microplate stacker with two Multidrop Combi dispensers
RapidStak microplate stacker with two Multidrop Combi dispensers
Published: 2013/03/21
Channel: RapidStak microplate stacker
Day long frozen multidrop run. Drop 3 of 6 (Old #27)
Day long frozen multidrop run. Drop 3 of 6 (Old #27)
Published: 2012/07/08
Channel: DTW-TheWanderingMuzungu
FHM2015 Polin Multidrop Classic-UNICO baking oven
FHM2015 Polin Multidrop Classic-UNICO baking oven
Published: 2015/10/06
Channel: F&B Equipment Sdn Bhd
WS2812b Led pixel wall with bespoke 18F26K22 processor and pc interface
WS2812b Led pixel wall with bespoke 18F26K22 processor and pc interface
Published: 2014/06/11
Channel: Andy Fordham
Day long frozen multidrop run. Drops 5&6 of 6 (Old #29)
Day long frozen multidrop run. Drops 5&6 of 6 (Old #29)
Published: 2012/07/08
Channel: DTW-TheWanderingMuzungu
CREATE A MULTI DROP DISTRIBUTION
CREATE A MULTI DROP DISTRIBUTION
Published: 2010/11/05
Channel: equatorworldwide
Feetech Smart Robot Servo/Daisy Chain Servo System For Fobotics
Feetech Smart Robot Servo/Daisy Chain Servo System For Fobotics
Published: 2016/11/15
Channel: Rc Fitec
POLIN MULTIDROP TWINY
POLIN MULTIDROP TWINY
Published: 2016/05/04
Channel: LME Quill
multi drop
multi drop
Published: 2015/07/02
Channel: JiayoJames
Thermo Multidrop Combi w Rapidstak
Thermo Multidrop Combi w Rapidstak
Published: 2015/05/14
Channel: Oscar Guerra
NEXT
GO TO RESULTS [51 .. 100]

WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
Jump to: navigation, search

A multidrop bus (MDB) is a computer bus in which all components are connected to the electrical circuit. A process of arbitration determines which device sends information at any point. The other devices listen for the data they are intended to receive.

Multidrop buses have the advantage of simplicity and extensibility. However, modern SDRAM chips exemplify the problem of electrical impedance discontinuity.[clarification needed] Fully Buffered DIMM is an alternative approach to connecting multiple DRAM modules to a memory controller. Since 2000, multidrop standards such as PCI and Parallel ATA are increasingly being replaced by point-to-point systems such as PCI Express and SATA.

MDB in vending machines[edit]

The multidrop bus used by vending machine controllers to communicate with the vending machine's components, such as a currency detector, is also called MDB (for MultiDropBus). In use since the 1980s, it is now an open standard of the National Automatic Merchandising Association, or NAMA. The devices communicate in a single-master, multiple-slave configuration using the MDB protocol, which is based on a Motorola[specify] 9-bit UART implemented as an 8-bit data value with an additional mode bit. The mode bit differentiates between ADDRESS and DATA bytes. The master sends messages containing one address byte and a variable number of data bytes. The bus "slave devices" listen for an address, and if it matches their address that slave device will process the message and respond to the master.[1] Though 9-bit compliant UARTs are not popular in PCs, they can be found in many microcontrollers.

The physical connection is realized as a serial bus with a fixed data rate of 9600 baud. There are just 2 communications signals plus the essential common-ground reference signal. The TX signal goes from the MASTER to every SLAVE device. The RX signal goes from every SLAVE device to the MASTER device. Both signals have pull-ups. The bus is driven at every transmitter by an open collector transistor driver, and isolated at each receiver with an opto-isolator - though cable harnesses carrying the communication signals may also carry 24-volt power and ground signals to devices, meaning the devices may not be isolated from each other as they share the same power bus. Some devices, however, may have alternate power supplies, especially devices with motors and high current needs such as vintage bill acceptors or currency detector devices.

MDB originated as a proprietary bus used by CoinCo for their coin-acceptors in the late 1980s and was deployed in high volume in vending machines for Coca-Cola. Coke forced CoinCo to "open-source it" in 1992 to increase competition, and NAMA released the first version of the standard in 1995, allowing other vendors to compete for the coin-acceptor portion of the vending machines (CoinCo and Mars were the 2 major suppliers in North America at the time) and also enabled alternative payment schemes (e.g. Smartcard based) to be connected to existing vending machines.

Bus addressing is based on the device type only, which allows for a very simple protocol stack, as no initial enumeration needs to be performed.

ccTalk[edit]

The ccTalk multidrop bus protocol uses an 8 bit TTL-level asynchronous serial protocol. It uses address randomization to allow multiple similar devices on the bus (after randomisation the devices can be distinguished by their serial number). ccTalk was developed by CoinControls, but is used by multiple vendors.

See also[edit]

References[edit]

External links[edit]

Disclaimer

None of the audio/visual content is hosted on this site. All media is embedded from other sites such as GoogleVideo, Wikipedia, YouTube etc. Therefore, this site has no control over the copyright issues of the streaming media.

All issues concerning copyright violations should be aimed at the sites hosting the material. This site does not host any of the streaming media and the owner has not uploaded any of the material to the video hosting servers. Anyone can find the same content on Google Video or YouTube by themselves.

The owner of this site cannot know which documentaries are in public domain, which has been uploaded to e.g. YouTube by the owner and which has been uploaded without permission. The copyright owner must contact the source if he wants his material off the Internet completely.

Powered by YouTube
Wikipedia content is licensed under the GFDL and (CC) license