FCM 300 / FCD 300 / VLT® 2800 / DP V1 PROFIBUS ■ Introduction Copyrights, Limitation of Liability and Revision Rights. Indicates a high-voltage warning. This publication contains information proprietary to Danfoss A/S. By accepting and using this manual the user agrees that the information contained herein will PROFIBUS is a registered trademark. be used solely for operating equipment of Danfoss A/S ■ About this manual or equipment from other vendors provided that such This manual describes the Profibus communication equipment is intended for communication with Danfoss in the following.
FCM 300 / FCD 300 / VLT® 2800 / DP V1 PROFIBUS The Profibus DP V1 replaces the former Profibus DP V0 functionality. Note: The 3MB and 12MB Profibus option are separate options and have different ordering numbers. ■ What you should already know The DANFOSS PROFIBUS is designed to communicate with any master abiding by the PROFIBUS DP standard. 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 manufacturer is beyond the scope of this manual and is of no.
FCM 300 / FCD 300 / VLT® 2800 / DP V1 PROFIBUS ■ Quick start Details regarding the programming of the usual frequency converter parameters may be gathered from the Design Guide for the FCM 300, the FCD 300 and VLT 2800. The communication is established by setting the parameters indicated below. Details regarding the adjustment of the master are provided by the master manual and by those chapters in this manual that deal with the particulars of the VLT PROFIBUS interface. NB!: The required GSD file is available on the internet at http://www.danfoss.com/drives. ■ Profibus DP Parameter 904 The.
FCM 300 / FCD 300 / VLT® 2800 / DP V1 PROFIBUS ■ Master-controlled frequency converters The PROFIBUS Fieldbus was designed to give you unprecedented flexibility and command over your controlled system. The PROFIBUS will perform as an integrated part of your frequency converter, giving you access to all parameters relevant to your application. The frequency converter will always act as a slave, and together with a master it can exchange a multitude of information and commands. Control signals such as speed reference, start / stop of motor, reverse operation, etc. are transmitted from the.
FCM 300 / FCD 300 / VLT® 2800 / DP V1 PROFIBUS ■ Bus topology Single master operation with DP V0 Single master PLC communicates with telegrams of constant length Fits to time critical requirements Cyclical transmission (PLC) 1. Setpoint transmission 2. Actual value feedback 3. New set points computed 4. New set point transmission 5. Parameter Read - using PCV channel 6. Parameter Write - using PCV channel 7. Read parameter description - using PCV channel ■ Features of DP (Distributed Periphery) - Is used by several PLC manufacturers for remote peripheral I/O communication. - Supports.
FCM 300 / FCD 300 / VLT® 2800 / DP V1 PROFIBUS ■ Profibus DP V1 The Profibus DP extension DP V1 offers additional to the cyclical data communication an acyclical communication. This feature can be used by a DP master type 1 (e.g. PLC), as well as a DP master type 2 (e.g. PC tool). Features of a Master type 1 connection - Cyclical data exchange (DP V0). - Acyclical read/write on parameters. The acyclical connection is fixed, and can not be changed during operation. Features of a Master type 2 connection: - Initiate / Abort acyclical connection. - Acyclical read/write on parameters. The.
FCM 300 / FCD 300 / VLT® 2800 / DP V1 PROFIBUS ■ FCM 300/FCD 300/VLT 2800 response time The update time via the prodibus connection can be divided in two parts: 1) The communication time, which is the time it takes to transmit data from the master to the slave (FCM 300/FCD 300/VLT 2800 with profibus), and 2) the internal update time, which is the time it takes to transmit data between the FCM 300/FCD 300/VLT 2800 control card and the profibus. Communication time (tcom) depends on the actual transmission speed (baudrate) and the type of master in use. The minimum obtainable communication.
FCM 300 / FCD 300 / VLT® 2800 / DP V1 PROFIBUS The Profibus Interface The total drop cable length for one segment is limited as stated in the table below. Drop cable length Transmission speed - Resistance: - Capacity: - Damping: Max. drop cable lenth per segment [m] 96 - Cross section: 187.5 kBaud 500 kBaud 1.5 mBaud 3-12 MBaud The length statements in the tables above are valid provided that bus cable with the following properties is used: - Cable type: - Screening: 135 to 165 ohm at a measuring frequency from 3 to 20 MHz < 110 ohm/km < 30 pF/m max. 9 dB over the whole wire length max.
Max. total bus cable length Transmission speed 1 segment: 32 nodes (31 VLT) [m] 9.6-187.5 kBaud 500 kBaud 1.5 MBaud 3 - 12 MBaud MG.90.A5.02 - VLT is a registered Danfoss trademark
FCM 300 / FCD 300 / VLT® 2800 / DP V1 PROFIBUS ■ Physical connection The PROFIBUS is connected to the bus line via X100, terminals 1 and 2. It is recommended to use a master with a galvanic isolated bus driver and with over voltage protection (e.g. zenerdiode). EMC precautions The following EMC precautions are recommended to obtain interference free operation of the PROFIBUS network. Additional information on EMC can be found in the design guide on the FCM 300 (MG.03.BX.02). Please also consult the manual of the PROFIBUS master for further installation guidelines. earth potential. The earth.
2 = RxD/TxD-N∼ (green cable) It is essential that the bus line is terminated properly. A mismatch of impedance may result in reflections on the line that will corrupt data transmission. - The PROFIBUS is provided with a suitable termination which may be activated by the switches of the RS485 switch block located just to the left of the terminal block X100 (see drawing below). The switches should be on to terminate the bus. NB!: The switches should never be left in opposite positions. They should either both be ON or both be OFF! Most masters and repeaters are equipped with their own.
