MasterBus - Modbus Interface
Contents
1. EC with the following standard Low voltage standard EN 60950 2000 March 2009 MasterBus Modbus Interface EN www busse yachtshop de info busse yachtshop de _ MASTERVOLT 4 INSTALLATION Insert the MasterBus cables first then connect the Modbus cables to the screw terminal see figure below 1 Modbus A line 2 Modbus B line 3 Modbus Ground 4 MasterBus communication LED MasterBus wa D connector MasterBus network MasterBus network Modbus network Overview and functional scheme of the Modbus 5 SPECIFICATIONS Model MasterBus Modbus interface Article number 77030800 Delivery also includes Screw terminal MasterBus cable MasterBus Terminating device User s manual Function of instrument Modbus to MasterBus interface Languages available English Nederlands Deutsch Frangais Castellano Italiano Norsk Svenska Suomi Dansk Power consumption 348 mW MasterBus Powering No Din rail mounting Yes Din rail 30 mm 1 2 inch Protection degree IP 21 Dimensions 66 x 78 x 32 mm 2 6 x 3 1 x 1 3 inch see drawing below Weight Approx 80 gr 0 18 Ib 33 1 3 33 1 3 32 1 3 5 j ine oO st l A O s l T Dimensions in mm inch LL 4510 18 6010 24 yineh EN MasterBus Modbus Interface March 2009 www busse yachtshop de info bus2. number 0 The Variable number is the index connected to every variable in a category Enter this number into ndex You now defined the position of the MasterBus device variable you want the Modbus to communicate with See the example how to find these variables IDAL IDB TabNr and Index using MasterAdjust March 2009 MasterBus Modbus Interface EN www busse yachtshop de info busse yachtshop de MASTERVOLT 6 3 Finding IDB and IDAL Select INT DC Relay and use right mouse button to select property A property form like below will pop up MasterAdjust software 2 10 Write down the values found You need them later to enter them into the PLC system File Edit Systemlogger Window Help COM 1 Used By Other Application Device My Computer Summary Monitoring Configuration Device Property State f USB MasterBus Standby INT Modbus to MB INT DC Relay Override Standby Product INT DC Relay Article 77030500 Serial W61640001 6 4 Finding TabNr and Index In this example the Override variable is selected to communicate with The picture below shows the Monitoring tab TabNr 0 The mouse hint right mouse button of this variable shows Index 1 MasterAdjust software 2 10 Software version Bus ID IDB Bus ID IDA L Type of product Interface The values needed are now Variable Value IDB 0x217
3. C1 hexadecimal figure IDAL Ox0E hexadecimal figure TabNr 0 Index 1 File Edit Systemlogger Window Help S My Computer COM 1 Used By Other Application Summary Device State E USB MasterBus Standby INT Modbus to MB INT DC Relay Override Standby 4 Number of items 2 index 1 EN MasterBus Modbus Interface March 2009 www busse yachtshop de info busse yachtshop de MASTERVOLT 6 5 Entering the values into Modbus After having written down the values needed you have to enter these into your Modbus system The next example shows how to enter the values and how to communicate with the chosen variable Override of MasterBus device INT DC Relay Request data frame 6 5 1 Modbus function code 23 The Modbus to MasterBus interface uses the Modbus function 23 communication protocol See the Modbus Application Protocol Specification V1 1b at www modbus org for more details The dataframe tables below describe the variables used in Modbus function 23 0x17 Read Write Multiple Registers Protocol Address field Function code Function 23 Data Read Starting Address etc CRC Error check 1 Byte 1 Byte 21 Bytes 2 Bytes Request Variable Size Value Bus address 1 Byte Variable Function code 1 Byte 0x17 Fixed Read Starting Address 2 Bytes 0 Fixed Quantity to Read 2 Bytes 6 F
4. MASTERVOLT USER S MANUAL MasterBus Modbus Interface Interface from Modbus to MasterBus MASTERVOLT ENGLISH PAGE 1 Snijdersbergweg 93 NEDERLANDS PAGINA 9 1105 AN Amsterdam DEUTSCH SEITE 17 The Netherlands FRANCAIS PAGINA 25 Tel 31 20 3422100 CASTELLANO PAGINA 33 Fax 31 20 697 1006 ITALIANO PAGINA 41 www Mastervolt com Copyright 2009 Mastervolt v 1 2 March 2009 www busse yachtshop de info busse yachtshop de MASTERVOLT 1 GENERAL INFORMATION 1 1 Use of this manual Copyright 2009 Mastervolt All rights reserved Reproduction transfer distribution or storage of part or all of the contents in this document in any form without the prior written permission of Mastervolt is prohibited This manual serves as a guideline for the safe and effective operation of the Modbus Keep this manual at a secure place 1 2 Guarantee specifications Mastervolt guarantees that this product was built according to the legally applicable standards and stipulations If you fail to act in accordance with the regulations instructions and stipulations in this users manual damage can occur and or the 2 OPERATION 2 1 MasterBus functions product will not fulfil the specifications This may mean that the guarantee will become null and void IMPORTANT Additional warranty agreements like Mastervolt system warranty may contain restrictions which forbid resetting of historical data The standard gua
5. ixed Write Starting Address 2 Bytes 0 read 1 write Quantity to Write 2 Bytes 6 Fixed Write Byte Count 1 Byte 12 Fixed IDAL 5 bit value 1 Byte Variable IDB 3 Bytes Variable TabNr 2 Bytes Variable Index 2 Bytes Variable Value 4 Bytes Variable CRC 2 Bytes Calculated Response data frame Address field Function code Function 23 Data Read Starting Address etc CRC Error check 1 Byte 1 Byte 13 Bytes 2 Bytes Response Variable Size Value Bus address 1 Byte Variable Function code 1 Byte 0x17 Fixed Byte Count 1 Byte 0x0C Fixed IDAL 5 bit value 1 Byte Variable IDB 3 Bytes Variable TabNr 2 Bytes Variable Index 2 Bytes Variable Value 4 Bytes Variable CRC 2 Bytes Calculated March 2009 MasterBus Modbus Interface EN www busse yachtshop de info busse yachtshop de _ MASTERVOLT 6 5 2 Example writing request e Monitoring TabNr 0 This is an example of a request to WRITE to the e Variable index Index 1 variable with e MasterBus device IDAL 0x0E ID e MasterBus device IDB 0x0217C1 Request example Variable Value Range Bus address 0x01 1 247 Function code 0x17 Fixed Read Starting Address Hi 0x00 Fixed Read Starting Address Lo 0x00 Fixed Quantity to Read Hi 0x00 Fixed Quantity to Read Lo 0x06 Fixed Write Starting Address Hi 0 Fixed Write Starting Add
6. rantee period is two years after date of purchase 1 3 Liability Mastervolt can accept no liability for e consequential damage due to use of the Modbus e possible errors in the manuals and the results thereof e Use that is inconsistent with the purpose of the product CAUTION Never remove the identification label The Modbus communicates via MasterBus For information about MasterBus see www mastervolt com The table below shows the interface functions Monitoring Function Description Factory settings Range State Interface can be switched Communicating Idle Idle activate or Idle standby Communicating Configuration Function Description Factory settings Range Language Set the Modbus menu language English See specifications Device name Any name you wish with 12 characters INT MB Modbus 12 characters max max Device ID Number to recognize the interface 1 1 247 Parity The parity check of the interface can be None None Even Odd set None means no parity check Speed Interface communication speed in Baud 19200 9600 19200 Set a lower speed if not all devices support 19200 Baud 3 EC DECLARATION OF CONFORMITY This product is in conformity with the provision of the EC EMC directive 89 336 EEC and amendments 92 31 EEC 93 68 EEC Standards applied Generic emission standard EN 50081 1 1992 Generic Immunity standard EN 50082 1 1997 Safety directive 2006 95
7. ress Enter Read Starting Address 0 Wrong Write starting address Enter Write Starting Address 0 or 1 03 Wrong Quantity to Read Enter Quantity to Read 6 Wrong Quantity to Write Enter Quantity to Write 6 04 Packet size is too large or too small Enter a Packet sized exactly 25 bytes including Modbus ID CRC IDAL value is too high Enter a maximum 5 bit value IDB value is too high Enter a maximum 18 bit value 05 The time out error occurs when there is Check if the MasterBus powering device is working and or no response from MasterBus for three seconds check the MasterBus wiring 6 5 4 Exception message Below the exception message is described and an example is shown Exception message Variable Size Value Bus address 1 Byte Variable Function code 1 Byte 0x97 Fixed Exception code 1 Byte Variable CRC 2 Byte Calculated Exception message example Variable Value Range Bus address 0x01 1 247 Function code 0x97 Fixed Exception code 0x05 1 5 CRC Lo 0x8E 0 255 CRC Hi 0x33 0 255 MASTERVOLT Snijdersbergweg 93 1105 AN Amsterdam The Netherlands Tel 31 20 3422100 Fax 31 20 6971006 Email info mastervolt com www busse yachtshop de info busse yachtshop de
8. ress Lo 1 0 read 1 write Quantity to Write Hi 0x00 Fixed Quantity to Write Lo 0x06 Fixed Write Byte Count Fixed 0x0C Fixed IDAL Ox0E 0 31 IDB Hi 0x02 0 3 IDB Mi 0x17 0 255 IDB Lo 0xC1 0 255 TabNr Hi 0x00 Fixed TabNr Lo 0x00 0 3 Index Hi 0x00 0 255 Index Lo 0x01 0 255 Value Lo Float IEEE 754 0x00 0 255 Value Mi 0x00 0 255 Value Hi 0x80 0 255 Value Exponent 0x3F 0 255 CRC Lo 0x85 0 255 CRC Hi OxFA 0 255 Response example Variable Value Range Bus address 0x01 1 247 Function code 0x17 Fixed Byte Count Fixed 0x0C Fixed IDAL Ox0E 0 31 IDB Hi 0x02 0 3 IDB Mi 0x17 0 255 IDB Lo 0xC1 0 255 TabNr Hi 0x00 Fixed TabNr Lo 0x00 0 3 Index Hi 0x00 0 255 Index Lo 0x01 0 255 Value Lo Float IEEE 754 0x00 0 255 Value Mi 0x00 0 255 Value Hi 0x80 0 255 Value Exponent 0x3F 0 255 CRC Lo 0x94 0 255 CRC Hi 0xC1 0 255 EN MasterBus Modbus Interface March 2009 www busse yachtshop de info busse yachtshop de MASTERVOLT 6 5 3 Exception codes The Modbus function 23 communication protocol implements five default Modbus Exception Codes for incorrectly entered values The table below describes the corresponding errors and proposes their solutions Code Error Solution 01 The function code is wrong Enter the Function 23 code 0x17 02 Wrong Read starting add
9. se yachtshop de MASTERVOLT 6 MODBUS INTERFACE CONFIGURATION This chapter describes the configuration of the Modbus interface for communication between the MasterBus network and the Modbus network The communication mode supported is RTU 6 1 What you need To configure the Modbus interface you will need besides the Modbus itself e a Modbus cable from your Modbus network to the Modbus interface e apc with Windows 2000 XP or higher e Masteradjust software free downloadable from www mastervolt com e USB MasterBus interface 6 2 MasterBus device address and variable The master of the Modbus network is able to communicate with any individual MasterBus device variable for read or write action For this communication the MasterBus_ device address and the position of the variable are needed 6 2 1 MasterBus Device Address The MasterBus Device Address consists of 2 variables e IDB 18 bit value and e IDAL 5 bit value These two variables are read out by MasterAdjust 6 2 2 Position of the MasterBus device variable The position of a particular MasterBus variable is expressed in 2 values Tab number column and Variable number row The Tab number is related to the category concerned There are 4 different categories as mentioned below e Monitoring e Alarm tab number 1 e History tab number 2 e Configuration tab number 3 Enter this number into TabNr to communicate with correct categories tab
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