vlt2800 DEVICENET 通讯手册.pdfvlt2800 DEVICENET 通讯手册pd

文件名称: vlt2800 DEVICENET 通讯手册.pdf

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详细说明：vlt2800 DEVICENET 通讯手册pdf,vlt2800 DEVICENET 通讯手册anity VLTo 2800/FCD 300 DeviceNet ■| ntroduction ■ About this manua This manual is intended to be used both as an instru tional and as a reference manual. It only briefly touch es on the basics of the DeviceNet protocol.Whenever it is necessary for gaining an understanding of the ac Drive Profile, please refer to the ODVA version 2.0 The manual is also intended to serve as a guideline when you specify and optimize your communication SYSTEM Even if you are an experienced DeviceNet program mer, we suggest that you read this manual in its en- tirety before you start programming, since important information can be found in all chapters nstallation at high altitudes △ At altitudes higher than 6, 600 feet 2 km1 please contact Danfoss Drives regarding PELV ■ Assumptions This manual assumes that you are using a DANFOSS VLT 2800 or FCd 300 unit with deviceNet. It is also assumed that you are using a PLC or PC, as a master that is equipped with a serial communication card sup porting all the Device Net communication services re quired by your application Further more it is assumed that all requirements stipulated in the deviceNet standard as well as those set up in the ac Drive Profile and those pertaining to the VLT Variable Speed Drive are strictly observed as well as all limitations therein fully respected d What you should already know The DANFOSS DeviceNet is designed to communi- cate with any master abiding by the device Net stand ard. It is therefore assumed that you have full knowledge of the Pc or PLC you intend to use as a master in your SYSTEM. Any questions pertaining to hardware or software produced by any other facturer is beyond the scope of this manual and is no concern to daNfoSs If you have questions about how to set up master master communication or communication to a non- Danfoss slave, the appropriate manuals should be consulted MG.90.B3.02 -VLT is a registered Danfoss trademark anity VLTo 2800/FCD 300 DeviceNet Available literature Supplied with the unit Below is a list of the literature available for VLT 2800 and FCD 300. It must be noted that there may be deviations from one country to the next Supplied with the unit: Operating instructions MG.27.AX.YY Quick setup MG.28.AX62 Parameter list MG.28.DX.YY Various literature Design Guide for VLT 2800 MG.27.EXYY Data sheet for VLT 2800 MD27.AX.YY Design Guide for FCD 300 MG. 04.AX.YY Data sheet for Fcd 300 MD. 04AXYY Instructions for vlt 2800- Assembly/disassembly M|.28.A1.02 LCP remate-mounting kit ML.56.AX.51 Filter instruction M|28B1.02 Communication with vlt 2800 and Fcd 300 Profibus manual MG. 90.AX.YY VLT 2800 Device Net manual MG.90, BX.YY X=version number rr= language version MG.90.B3.02-VLT is a registered Danfoss trademark anity VLTo 2800/FCD 300 DeviceNet Product and environment Overall Function Device Net is a distributed control network, the devi- DeviceNet is a low-level network that standardizes ceNet protocol is embedded in the control card and is communications between industrial devices(sensors, a communication protocol conforming to the Open De- limit switches )and high level devices(controllers). the viceNet Vendor Association(ODVA) standard communication network can be peer to peer or master/ The control card allows device Net compatible control slave Device Net uses CaN technology for Media ac lers, sensors, and network management tools to con cess Control and Physical Signaling and it supports up trol, monitor, and supervise the vLt frequency con to 64 nodes Device Net also defines device profiles for. verter. The control card is designed to the deviceNet devices belonging to specific classes. For other devi-8 System Protocol for Vendors as a slave device ces, a custom class must be defined in order to make3 it DeviceNet compatible. This further enhances the in-s terchangeability and interoperability of the network ■ Network Each node on the network has its own unique media access control identifier(MAC ID)to distinguish it on The VLt frequency converter will function as a slave the network on the Device Net network. All addressing and linking to nodes is done at installation time by a network man ager tool. The network installer and the network mar Control card self-test agement master have a significant intluence on how the node functions on the network a devicenet net. Please refer to parameter 620 in the Programming work can support up to 64 nodes ■ User proffile The end-user is a network manager programmer or a controller who see the device Net control card as a transparent bridge to the vLt frequency converter Control and supervision of the VLT frequency convert- er will still be possible through the standard parameter Interface to Device Net Network The Interface connection to the devicenet network is implemented through a CaN chip. Four different 1/O Assembly is available in the VLt frequency converter Device Net interface, which can be configured by the user. The lo assembly can handle Polled mode, Bit Strobe, Change of state(COS)and Cyclic For explicit messages, the interface has two Unconnected mes sages Manager(UCMM)available. This allows two nodes on the DeviceNet to directly access parameters in the vLt frequency converter without involving a pre configured master Data communication interface No direct data communication intertace(e.g via a rial port) other than the Device Net interface and the VLT trequency converter intertace is considered LCP2 or Dialog can be used on the Subd plug while using deviceNet MG.90.B3.02 -VLT is a registered Danfoss trademark anity VLTo 2800/FCD 300 DeviceNet ■ Technica|Data ■ Cable Lengths Baud rate Max total cable length [m] Drop Length Maximum Cumulative 125k baud 500 meters(1640 ft 156 meters(512 ft 250k baud 250 meters (820 ft 6 meters(20 ft 78 meters (256 ft 500k baud 100 meters(328 ft for one drop 39 meters(128 ft ■ Topolog 24V Trunk line Power supply Drop lines 1 RT=Termination resistors mNczom MG.90.B3.02-VLT is a registered Danfoss trademark anity VLTo 2800/FCD 300 DeviceNet ■ Cable specifications The cable is to be used according to ODVA specifica- ons ■ Network Power Supply The Device Net option is an optically isolated node where transceiver power is provided by the network EXternal network power supply requirements are 11-25VDC 10 mA draw per VLT frequency converter node ■ Cable cross section uara insuiation Uc Hower Insuction Color:Whi会 Color: Black Brad shleld AL/M丫 Shield Data insulation DC Power insulator Color: Red 175ZA597.10 MG.90.B3.02 -VLT is a registered Danfoss trademark anity VLTo 2800/FCD 300 DeviceNet ■ EMC Precautions The deviceNet communication cable must be kept The following EMC precautions are recommended to away from motor and brake resistor cables to avoid obtain interference free operation of the Device Net coupling of high frequency noise from one cable to th network. Additional information on EMc can be found other. normally a distance of 200 mm( 8 inches)is in the FCD 300 and in the VLT 2800 Series Operating sufficient, but it is generally recommended to keep the Instructions and Design Guide greatest possible distance between the cables, espe cially where cables are running in parallel over long NB! distances Relevant national and local regulations, If the deviceNet cable has to cross a motor and brake for example regarding protective earth resistor cable they must cross each other at an angle connection. must be observed of 90 PLC Earthing rail 网网 All cable ane si Control cables Motor termistor Reinforced protective earth Brak● Example: VLT 2800 panel mounting MG.90.B3.02-VLT is a registered Danfoss trademark anity VLTo 2800/FCD 300 DeviceNet ■ VLT Response Time The update time via the device Net connection can be divided into two parts 1. The communication time which is the time it takes to transmit data from the master to the slave (VLT with DeviceNet option) 2. The internal update time, which is the time it takes to transmit data between the vlt fre quency converter control card and the devi ceNet interface Communication time (tcom) depends on the actual transmission speed(baudrate)and the type of master in use. More slaves or lower transmission speed will increase the communication time Device Net Mot。r Master control Data Update time Control word via l/o instances 14 msec Main actual value via l/o instances 44 msec Status word via l/o instances Reference via l/o instances 44 msec Control via Class Code 0x29 Reference via class Code ox2A 44 msec Change of parameter via Explicit message and 94 msec Danfoss object Read of parameter via Explicit message and 14 msec Danfoss object MG.90.B3.02 -VLT is a registered Danfoss trademark anity VLTo 2800/FCD 300 DeviceNet Electrical Installation VLT 2800 Connection of the cable screen Danfoss recommends that the screen of the device CAN Net cable be connected to ground at both ends of the cable at every Device Net station(see Danfoss recom- mendation for further details It is very important to have a low impedance ground connection of the screen, also at high frequencies This can be obtained by connecting the surface of the screen to ground, for example by means of a cable clamp or a conductive cable gland. VLT frequency ⑧國⑧ converter Series are provided with different clamps and brackets to enable a proper ground connection of the deviceNet cable screen the screen connection is 135NA21710 shown in the drawing VLT 2800 Earth Connection For fulfilling the ce and EMc compliance. It is important that all stations connected to the devi- e net network are connected to the same earth tential. The earth connection must have a low HF(high d旨妄 frequency)impedance. This can be achieved by con C V+ necting a large surface area of the cabinet to ground for example by mounting the VLT frequen on a conductive rear plate. Especially when having long distances between the stations in a deviceNet network it can be necessary to use additional potential equalizing cables, connecting the individual stations to ⑧囡 the same earth potential Vlt 2800 DeviceNet connection It is essential that the bus line be terminated properly A mismatch of impedance may result in reflections on VLT 2800 ODVA recommendation he line that will corrupt data transmission Screen must be connected to ground at only one point The Device Net control card is provided with a plugga on the network ble connector NB! By using a pluggable connector as a splice between Please note, that this recommendation two trunk lines removal of devices will not sever the conflicts with the emc correct installation network Strain relief, if required, must be provided by the developer. In current installations of this type of connector, the strain relief is attached to the product. NB! Wires should not be installed while the network is active. This will prevent prob- lems such as shorting the network supply or disrupting communications. VLT 2800 Drop cable An alternative to splicing two trunk lines in the con nector on the control card, is using a DeviceNet con nection box or a T-connector For this kind o nstallation a drop cable is available as an option Drop cable ordering number: 195N3113 10 MG.90.B3.02-VLT is a registered Danfoss trademark

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