Altivar 312
Contents
1. 2 bytes Response Slave 10 No of first word Number of words CRC16 m Hi Lo Hi Lo Lo Hi 1 byte 1 byte 2 bytes 2 bytes 2 bytes Example write values 20 and 30 in words W9001 and W9002 in slave 2 ACC 20 s and DEC 30 s Request 02 10 2329 0002 04 0014 001E 517F Response 02 10 2329 0002 8FED Lo CRC16 Hi 2 bytes BBV52816 04 2009 Modbus protocol Exception responses An exception response is returned by a slave when it is unable to perform the request which is addressed to it Format of an exception response Slave Response Error CRC16 no code code t Hi 1 byte 1 byte 1 byte 2 bytes Response code request function code 16 80 Error code 1 The function requested is not recognized by the slave 2 The bit or word addresses indicated in the request do not exist in the slave 3 The bit or word values indicated in the request are not permissible in the slave 4 The slave has started to execute the request but cannot continue to process it completely CRC16 calculation The CRC16 is calculated on all the message bytes by applying the following method Initialize the CRC 16 bit register to 16 FFFF Enter the first to the last byte of the message CRC XOR Enter 8 times End enter End enter Move the CRC one bit to the right lt byte gt gt CRC If the output bit 1 enter CRC XOR 16 A001 gt CRC The CRC obtained will be transmitt2. WARNING LOSS OF CONTROL fault should only be used for adjustment or special applications purpose Failure to follow these instructions can result in death serious injury or equipment damage If Modbus fault management 5 L L is set to nO communication control will be inhibited For safety reasons inhibition of communication BBV52816 04 2009 Connection to RS485 bus Standard schematic The standard schematic corresponds to the Modbus specification published on the Modbus org site in 2002 Modbus_over_serial_line_V1 pdf Nov 2002 and in particular to the schematic of the 2 wire multidrop serial bus The ATV312 drive conforms to this specification Schematic diagram Master Common 7 N cA ro OT III i l i i i i i i i i i i i i i i i i i i i l I l OESE ee AOE tun Type of trunk cable Shielded cable with 1 twisted pair and at least a third conductor Maximum length of bus 1000 m at 19200 bps with the Telemecanique TSX CSAsee cable Maximum number of stations without 32 stations ie 31 slaves repeater Maximum length of tap links 20 m for one tap link 40 m divided by the number of tap links on a multiple junction box Bus polarisation One 450 to 650 Q pulldown resistor at 5 V 650 Q recommended One 450 to 650 pulldown resistor at the Common 650 Q recommended This polarisation is recommended for
3. or terminal strip screw connections with voltage present DO NOT short across terminals PA and PC or across the DC bus capacitors Before servicing the drive Disconnect all power including external control power that may be present Place a DO NOT TURN ON label on all power disconnects Lock all power disconnects in the open position WAIT 15 MINUTES to allow the DC bus capacitors to discharge Then follow the Bus Voltage Measurement Procedure see Installation manual to verify that the DC voltage is less than 42 V The drive LEDs are not indicators of the absence of DC bus voltage Install and close all covers before applying power or starting and stopping the drive Failure to follow these instructions will result in death or serious injury A DANGER UNINTENDED EQUIPMENT OPERATION Read and understand this manual before installing or operating the Altivar 312 drive Any changes made to the parameter settings must be performed by qualified personnel Failure to follow these instructions will result in death or serious injury A WARNING DAMAGED DRIVE EQUIPMENT Do not operate or install any drive or drive accessory that appears damaged Failure to follow these instructions can result in death serious injury or equipment damage A WARNING LOSS OF CONTROL The designer of any control scheme must consider the potential failure modes of control paths
4. polarisation Rp all station polarisations must be deemed to be connected in parallel Example If the bus Rp polarisation is 470 Q installed in the master and 2 slaves have 4700 Q polarisation the equivalent polarisation is 1 Re 1 470 1 4700 1 4700 ie Re 1 1 470 1 4700 1 4700 and therefore Re 390 Q 390 Q is greater than 162 Q and the schematic is correct For an ideal equivalent polarisation 650 Q Rp bus polarisation can be installed so that 1 650 1 Rp 1 4700 1 4700 ie Rp 1 1 650 1 4700 1 4700 and therefore Rp 587 Q If the master is fitted with a 470 Q polarisation it is possible to connect a maximum of 18 slaves with 4 7 KQ polarisation 18 BBV52816 04 2009 Appendix Non standard RS485 schematics Recommendations for setting up a Modbus network using non standard devices 1 Identify polarities DO and D1 They are labeled in a variety of ways according to the specification used Modbus DO D1 Common EIA TIA 485 AIA B B C C UNI TELWAY D A D B OVL RD TD RD TD Jbus L L However certain RS485 electronic components are labeled in the opposite way to the EIA TIA 485 standard It may be necessary to perform a test by connecting a master to a slave then reversing the connection in the event of failure 2 Check polarizations Study the documentation supplied with the devices to determine the polarization resistance If there is one chec
5. the master Line terminator One 120 Q 0 25 W resistor in series with a 1nF 10 V capacitor Common polarity Yes Common connected to the protective ground at one or more points on the bus 10 BBV52816 04 2009 Modbus protocol Configuration of the serial link Configuration of the serial link parameters can be accessed from the Communication menu COM Parameters Possible values Terminal display Default value Address 1 to 247 OO Ito241 1 Add Speed 4800 bps T A 19200 bps bir 9600 bps g G 19200 bps 1 a E Format 8 data bits odd parity 1 stop bit BOI 8E1 EF Oo 8 data bits even parity 1 stop bit 1 BEI 8 data bits no parity 1 stop bit Ar l 8 data bits no parity 2 stop bits Ane 1 The display terminal will only work with these values RTU mode The transmission mode used is RTU mode The frame contains no message header byte nor end of message bytes It is defined as follows The data is transmitted in binary code CRC16 cyclical redundancy check The end of the frame is detected on a silence greater than or equal to 3 characters Principle The Modbus protocol is a master slave protocol Master Only one device can transmit on the line at any time The master manages the exchanges and only it can take the initiative It interrogates each of the slaves in succession er No slave can send a message unless it is invited to do so The master repeats the question when the
6. BBV52816 Altivar 312 Variable speed drives for asynchronous motors Modbus communication manual 04 2009 Schneider www schneider electric com ES Electric Contents Important Information Before you begin Documentation structure Presentation Connection to RS485 bus Configuration of the Modbus serial port Modbus protocol Appendix Non standard RS485 schematics m eect MA OANDALA BBV52816 04 2009 Important Information NOTICE Read these instructions carefully and look at the equipment to become familiar with the device before trying to install operate or maintain it The following special messages may appear throughout this documentation or on the equipment to warn of potential hazards or to call attention to information that clarifies or simplifies a procedure The addition of this symbol to a Danger or Warning safety label indicates that an electrical hazard exists which will result in personal injury if the instructions are not followed This is the safety alert symbol It is used to alert you to potential personal injury hazards Obey all safety messages that follow this symbol to avoid possible injury or death A DANGER DANGER indicates an imminently hazardous situation which if not avoided will result in death or serious injury A WARNING WARNING indicates a potentially hazardous situation which if not avoided can result in death serious injur
7. V52816 04 2009 Modbus protocol Identification Function 43 16 2B Request Slave 2B Type of MEI ReadDeviceld Object Id CRC16 no OE 01 00 Lo Hi 1 byte 1 byte 1 byte 1 byte 1 byte 2 bytes Response Slave 2B Type of MEI ReadDeviceld Degree of conformity no 0E 01 02 1 byte 1 byte 1 byte 1 byte 1 byte Number of additional frames Next object Id Number of objects 00 00 03 1 byte 1 byte 1 byte Id of object no 1 00 Length of object no 1 oD Value of object no 1 Telemecanique 1 byte 1 byte 13 bytes Id of object no 2 01 Length of object no 2 OF Value of object no 2 ATV31HU09M3S232 1 byte 1 byte 15 bytes Id of object no 3 Length of object no 3 Value of object no 3 02 04 0201 1 byte 1 byte 4 bytes CRC16 Lo Hi 1 byte 1 byte The total response size equals 48 bytes The three objects contained in the response correspond to the following objects e Objectno Manufacturer name always Telemecanique ie 13 bytes a Object no 2 e Objectno Device version in MMmm format where MM represents the determinant and mm the subdeterminant 4 byte ASCII fos string for example 0201 for version 2 1 Device reference ASCII string for example ATV31HU09M3S232
8. and for certain critical control functions provide a means to achieve a safe state during and after a path failure Examples of critical control functions are emergency stop and overtravel stop Separate or redundant control paths must be provided for critical control functions System control paths may include communication links Consideration must be given to the implications of unanticipated transmission delays or failures of the link Failure to follow these instructions can result in death serious injury or equipment damage w For additional information refer to NEMA ICS 1 1 latest edition Safety Guidelines for the Application Installation and Maintenance of Solid State Control and to NEMA ICS 7 1 latest edition Safety Standards for Construction and Guide for Selection Installation and Operation of Adjustable Speed Drive Systems BBV52816 04 2009 a Documentation structure The following Altivar 312 technical documents are available on the Schneider Electric website www schneider electric com as well as on DVD ROM reference VW3A8200 Installation manual This manual describes how to install and wire the drive Programming manual This manual describes the functions parameters and use of the drive terminal integrated display terminal optional graphic display terminal and optional remote terminal The communication functions are not described in this manual but in the man
9. ed with the low order bytes sent first followed by the high order ones unlike the other data contained in Modbus frames XOR exclusive OR BBV52816 04 2009 15 Appendix Non standard RS485 schematics Uni Telway schematic The Uni Telway bus schematic has been used by Telemecanique for its drives and soft starters ATV58 ATV 28 etc Schematic diagram Master Slave 1 Slave n Type of trunk cable Cable with 2 twisted pairs shielded in pairs Maximum length of bus 1000 m at 19200 bps Maximum number of stations without 29 stations ie 28 slaves repeater 20m Maximum length of tap links 40 m divided by the number of tap links on a multiple junction box Bus polarisation For the master and each slave One 4 7 KQ pulldown resistor at 5 V One 4 7 KQ pulldown resistor at O VL Line terminator One 120 Q 0 25 W resistor in series with a 1 nF 10 V capacitor Yes 0 VL and high impedance placed between 0 VL and the ground in each station Common polarity BBV52816 04 2009 Appendix Non standard RS485 schematics Jbus schematic Schematic diagram L A A Slave 1 Slave n Type of trunk cable Cable with 1 shielded twisted pair Maximum length of bus 1300 m at 19200 bps Maximum number of stations without repeater 32 stations ie 31 slaves Maximum le
10. er 16 Write N output words YES 27 words max Preset Multiple Regs 43 Identification NO Read Device Identification Read N output words function 3 Note Hi high order byte Lo low order byte This function can be used to read all ATV 312 words both input words and output words Request Slave 03 No of first word Number of words CRC16 Be Hi Lo Hi Lo Lo Hi 1 byte 1 byte 2 bytes 2 bytes 2 bytes Response Slave 03 Number of First word value Last word value CRC16 ne bytes read Hi Lo Hi Lo Lo Hi 1 byte 1 byte 1 byte 2 bytes 2 bytes 2 bytes Example read 4 words W3102 to W3105 16 0C1E to 16 0C21 in slave 2 using function 3 where SFr Switching frequency 4 kHz W3102 16 0028 e tFr Maximum output frequency 60 Hz W3103 16 0258 e HSP High speed 50 Hz W3104 16 01F4 e LSP Low speed 0 Hz W3105 16 0000 Request 02 03 OC1E 0004 276C Response 02 03 08 0028 0258 01F4 0000 52B0 Value of W3102 W3103 W3104 W3105 Parameters SFr tFr HSP LSP Write one output word function 6 Request and response the frame format is identical Slave 06 Word number Value of word CRC16 u Hi Lo Hi Lo Lo Hi 1 byte 1 byte 2 bytes 2 bytes 2 bytes Example write value 16 000D in word W9001 16 2329 in slave 2 ACC 13 s Request and response 02 06 2329 000D 9270 BB
11. ie 15 bytes Note The response to function 43 may be negative in this case the response located at the top of the next page is sent by the Altivar 312 rather than the response described above BBV52816 04 2009 13 Modbus protocol Negative response Slave 2B 80 Type of MEI Error code CRC16 no AB 0E 00 to 02 i Lo Hi 1 byte 1 byte 1 byte 1 byte 1 byte 1 byte Error code 16 0 No error o 1640 The Request code 16 2B the Type of MEI 16 0E or the ReadDeviceld 16 01 contained in the 1 request is incorrect e 1640 The Object Id 16 00 contained in the request is incorrect Example Following the request from the Modbus master slave 2 identifies itself as follows Manufacturer name Telemecanique 13 bytes Device name ATV31HU09M3S232 15 bytes Device version 0201 4 bytes Request 02 2B 0E 01 00 3477 Response 02 2B 0E 01 02 00 00 03 00 0D 54 45 4C 45 4D 45 43 41 4E 49 51 55 45 01 OF 41 54 56 33 31 48 55 30 39 4D 33 53 32 33 32 02 04 30 32 30 31 A80F Write N output words function 16 16 10 Request No 10 No of first word Number of Number of Value of first word slave Hi Lo words bytes Hi is 1 byte 1 byte 2 bytes 2 bytes 1 byte
12. ions The two most common networks are described in the appendices Uni Telway schematic page 16 e Jbus schematic page 17 Requirements enabling different types of protocol to coexist are given in the appendix e Mixed schematic page 18 In case of coexistence of different types of protocol see the appendix page 21 8 BBV52816 04 2009 Configuration of the Modbus serial port Communication Menu Structure The communication parameters are part of the COM and FLt menus These parameters are accessible as follows BED Ebr BER Communication configuration Parameters decription Parameter description Range or listed values default Long name Short name Modbus Address 1 to 247 1 Modbus Address Add Add Modbus baud rate 4 8 kbps 19 2 kbps Modbus baud rate 4 Ebr 9 6 kbps IB Important only 19 2 kbps baud 19 2 kbps id rate allows to communicate with the remote display Modbus format 801 8 bits odd parity 1 stop bit 8E1 8 odd 1 stop BD I EFO 8E1 8 bits even parity 1 stop bit 8 even 1 stop BEI 8N1 8 bits no parity 1 stop bit 8 no 1 stop En 8N2 8 bits no parity 2 stop bits 8 no 2 stop Hog Modbus time out Adjustable from 0 1 to 30s 10s Modbus time out EEU EED Modbus fault mgt No action No oJ SLL Freewheel stop Freewheel JES This parameter is not a Ramp stop Ramp Stop rNP communication management Fast stop Fast Stop FSE parameter A
13. k that the value is correct see Mixed schematic page 18 Polarization is not always possible For example in the event of the 5 V not being available in the master 3 Select a line terminator In the case of polarization select an RC line terminator R 120 Q C 1 nF If polarization is not possible select an R line terminator R 150 Q BBV52816 04 2009 BBV52816 ATV312_Modbus_EN_V1 pdf 04 2009
14. ngth of tap links 3m Bus polarisation One 470 Q pulldown resistor at 5 V One 470 Q pulldown resistor at 0 V This polarisation is often provided in the master Line terminator One 150 Q resistor Common polarity No BBV52816 04 2009 17 Appendix Non standard RS485 schematics Mixed schematic Slaves with 4 7 kQ polarisation can be integrated into a standard schematic Suitable polarisation Rp must be calculated Schematic diagram Master 7 Type of trunk cable Shielded cable with 1 twisted pair and at least a 3 conductor Maximum length of bus 1000 m at 19200 bps Maximum number of stations At most 32 stations ie 31 slaves depending on Rp and the number of 4 7 kQ resistors without repeater Maximum length of tap links e 20 m for a single tap link 40 m divided by the number of tap links on a multiple junction box Bus polarisation One pulldown resistor at 5 V Rp One pulldown resistor at the Common Rp This polarisation can be provided in the master The value of Rp should be validated or determined by calculating the equivalent polarisation Re according to the polarisation of the master and slave stations The value of Re must be between 162 Q and 650 Q recommended value 650 Q Line terminator One 120 Q 0 25 W resistor in series with a 1 nF 10 V capacitor Common polarity Yes Common To calculate the
15. nsult our catalogues Connect the RJ45 cable connector to the ATV312 connector Pin out of the ATV312 RJ45 Connector View from underneath Pin Signal CANopen signal reserved CANopen signal reserved CANopen signal reserved D1 Modbus signal DO Modbus signal Not connected VP 1 CO NI OD ol A ol N gt Common Modbus signal 1 Supply for RS232 RS485 converter or a remote terminal Protection against interference Use the Telemecanique cable with 2 pairs of shielded twisted conductors reference TSXCSA100 TSXCSA200 TSXCSA500 Keep the Modbus cable from the power cables 30 cm minimum e Make any crossovers of the Modbus cable and the power cables at right angles if necessary e Connect the cable shielding to the ground of each device For more information please refer to the TSX DG KBL E guide Electromagnetic compatibility of industrial networks and fieldbuses RS485 bus schematic The RS485 standard allows variants of different characteristics polarisation line terminator distribution of a reference potential number of slaves length of bus The new Modbus specification published on the Modbus org site in 2002 contains precise details of all these characteristics They are also summarised in the next paragraph Standard schematic The new Telemecanique devices conform to this specification Some devices comply with earlier specificat
16. re is an incorrect exchange and declares the interrogated slave absent if no response is received within a given time period If a slave does not understand a message it sends an exception response to the master The master may or may not repeat the request SS Direct slave to slave communications are not possible For slave to slave communication the application software must therefore be designed to interrogate a slave and send back data received to the other slave Two types of dialogue are possible between master and slaves e the master sends a request to a slave and waits for its response the master sends a request to all slaves without waiting for a response broadcasting principle Addresses The drive Modbus address can be configured from 1 to 247 Address 0 coded in a request sent by the master is reserved for broadcasting ATV 312 drives take account of the request but do not respond to it BBV52816 04 2009 11 Modbus protocol Modbus functions The following table indicates which Modbus functions are managed by the Altivar 312 and specifies their limits The read and write functions are defined from the point of view of the master en Function name Broadcasting Max value of N Modbus standard name 3 Read N output words NO 29 words max Read Holding Registers 6 Write one output word YES _ Preset Single Regist
17. ual for the bus or network used Simplified manual This manual is a simplified version of the User manual This manual is delivered with the drive Quick Start sheet The Quick Start describes how to wire and configure the drive to start motor quickly and simply for simple applications This document is delivered with the drive Communication manuals Modbus CANopen These manuals describe the assembly connection to the bus or network signaling diagnostics and configuration of the communication specific parameters They also describe the communication protocol services Communication variables manual The Communication variables manual defines the drive control processes and the drive variables which can be accessed by the communication buses Modbus CANopen 6 BBV52816 04 2009 Presentation The Modbus socket on the Altivar 312 can be used for the following functions Configuration Settings Control e Monitoring The ATV312 drive supports The 2 wire RS485 physical layer e The RTU transmission mode This guide contains information on installation and describes the Modbus services available The communication variables guide describes the operating modes as well as the Altivar 312 variables and parameters which can be accessed via the communication bus BBV52816 04 2009 7 Connection to RS485 bus Connection to ATV312 Connection accessories should be ordered separately please co
18. y or equipment damage A CAUTION CAUTION indicates a potentially hazardous situation which if not avoided can result in injury or equipment damage CAUTION CAUTION used without the safety alert symbol indicates a potentially hazardous situation which if not avoided can result in equipment damage PLEASE NOTE The word drive as used in this manual refers to the controller portion of the adjustable speed drive as defined by NEC Electrical equipment should be installed operated serviced and maintained only by qualified personnel No responsibility is assumed by Schneider Electric for any consequences arising out of the use of this product 2009 Schneider Electric All Rights Reserved 4 BBV52816 04 2009 Before you begin Read and understand these instructions before performing any procedure with this drive A A DANGER HAZARD OF ELECTRIC SHOCK EXPLOSION OR ARC FLASH e Read and understand this manual before installing or operating the Altivar 312 drive Installation adjustment repair and maintenance must be performed by qualified personnel The user is responsible for compliance with all international and national electrical code requirements with respect to grounding of all equipment Many parts of this drive including the printed circuit boards operate at the line voltage DO NOT TOUCH Use only electrically insulated tools DO NOT touch unshielded components
Download Pdf Manuals
Related Search