User`s manual VW3A58306
Contents
1. C5 Note Physical layer with a capacity of 18 drives Don t forget to configurate the drive adresses in local mode via the operator s terminal or programming terminal or PC software respectively connected to each drive Example of connection to a RS485 standard bus with PC and PLC TSX SCA62 TSX SCA62 TSX SCM2214 TSX CSA TSX CSA 0 D DEED TSX 47 Channel 1 ALTIVAR 58 ALTIVAR 58 ALTIVAR 58 A Note PC and PLC cannot be connected simustanously to the bus Physical layer with a capacity of 18 drives 18 Connection to Multidrop Bus Connection accessories used in the examples C1 9 pin male connector Phoenix Contact SUBCON 9 M SH type with cabling of the pins 3 4 6 and 7 4 conductor shielded cable 1 mm max plus male female adapter 9 pin SUB D 1 C2 9 pin female connector Phoenix Contact SUBCON 9 F SH type with cabling of the pins 3 4 6 and 7 4 conductor shielded cable 1 mm max C3 Connector Phoenix Contact of the SUBCON PLUS M2 type plus male female adapter 9 pin SUB D 1 Cabling ofthe pins 3 4 and 7 4 conductor shielded cable 1 mm max C4 25 pin SUB D male connector with cabling of the pins in correspondence with C3 C3 pins C4 pins 3 21 4 ET not connected 7 4 232. I 1 shielded on 1 15 and 23 connected 4 and 10 connected 7 and 8 connected 11 and 19 connected 18 and 21 connected C5 Box Phoenix Contact PSM PTK type C6 Male connector Phoenix Contact SUBCON 9 M SH type with cabling of the pins 4 and 7 4 conductor shielded cable 1 mm max 1 male female adapter 9 pin SUB D 19 IO rozm I0 ro2mM Modbus Protocol Exchange format The Modbus protocol has the following exchange format Speed 19200 bits second Parity none Format 8 bits 1 start bit and 1 stop bit Modbus frames RTU mode The frame defined for the Modbus protocol has neither message header bytes nor end of message bytes It is defined as follows Address Request Data CRC16 The data is transmitted in binary code CRC16 cyclical redundancy check The end of the frame is detected on a silence of gt 3 characters ATV58 address the ATV58 address varies from 0 to 31 andis configured in menu 4 CONTROL via the PC software or display module 20 Modbus Protocol Principle The Modbus protocol is a dialog protocol which creates a hierarchical structure one master and several slaves The Modbus protocol enables the master to interrogate one or more intelligent slaves A multidrop link connects the master and slaves Two types of dialog are possible between master and slaves the master talks
3. byte gt CRC Enter 8times Move the CRC one bit to the right If the output bit 1 enter CRC XOR H A001 gt CRC End enter End enter The low order bytes of the CRC obtained will be transmitted first followed by the high order ones XOR exclusive OR 25 ro rozm 0 33 89110 85597 5 VVDED397057 W9 1493690 01 11 A02 85597 1998 02
4. The master or supervision device takes the initiative for the exchanges This master addresses a slave by supplying it with four types of data the slave address the function required of the slave the data zone variable depending on the request the exchange check The link master waits for the response from the slave before transmitting the next message thus avoiding any conflict on the line Operation in half duplex mode is therefore authorized 22 Modbus Protocol Control and supervision All management of exchanges between two units which are communicating via an asynchronous serial link naturally includes exception responses when exchange faults occur Various inconsistent messages may be sent to the slave In this case the slave will tell the master that it does not understand and the master will decide whether or not to repeat the exchange Master Modbus functions The following table shows the functions which are managed by the Altivar 58 communication option and specifies its limits The read and write functions are defined from the point of view of the master Code of function B 1 Altivar 58 03 Read N output words 32 max 06 Write an output word B YES 16 Write N output words B 30 max 1 Functions marked B can be broadcast The message transmitted by the master must specify slave number 0 A response messag
5. Altivar 58 Telemecanique Guide d exploitation User s manual Kit connexion RS485 RS485 connection kit VW3 A58306 GROUPE SCHNEIDER m Merlin Gerin 8 Modicon B Square D Telemecanique Altivar 58 Kit connexion RS485 Page 2 RS485 connection kit Page 14 ro rozm When the speed controller is powered up the power components and some of the control components are connected to the line supply Itis extremely dangerous to touch them The speed controller cover must be kept closed After switching the ALTIVAR off wait for 3 minutes before working on the equipment This is the time required for the capacitors to discharge While every precaution has been taken in the preparation of this document Schneider Electric SA assumes no liability for any omissions or errors it may contain nor for any damages resulting from the application or use of the information herein The products and add ons described in this document may be changed or modified at any time either from a technical point of view or in the way they are operated Their description can in no way be considered contractual Contents Presentation Installation 16 Connection to Multidrop Bus 17 to 19 20
6. e is never returned 23 IO rozm I0 ro2mM Modbus Protocol Detailed information on functions Code 03 Read N output words This function is used to read output words words which can be written and read in the slave by the master Code 06 Write an output word This function is used to write a 16 bit output word words which can only be written Code 16 Write N output words This function is used for the master to read output words in the slave words which can be written and read Details of frames Read N output words function 3 Question Slave 03 No of 1st word Number of words CRC16 no Hi Lo Hi Lo 1 byte 1 byte 2 bytes 2 bytes 2 bytes Response Slave 03 Number of Value of 1st word Value of CRC16 no bytes last word Hi Lo Hi Lo 1byte 1 byte 1 byte 2 bytes 2 bytes 2 bytes Example read words W450 to W459 of slave 2 supervision parameters Question 02 03 01C2 000A CRC16 Response 02 03 14 XX xxxx CRC16 Value Value of W250 of W253 Write an output word function 6 Question Slave 06 Word no Word value CRC16 no PF Pf PF Pf 1 byte 1 byte 2 bytes 2bytes 2bytes Response Slave 06 Word no Word value CRC16 no PF Pf PF Pf 1 byte 1 byte 2 bytes 2bytes 2bytes Wri
7. t 30 cm with any crossover at right 9 angles if necessary and connect the cable shielding to the ground of each device Fit a line terminator at both ends of the line D A HH ml Zt line terminator 1nF recommended at D B a both ends of the line Note the link between pins 8 and 9 of the 9 pin connector has no function on the Altivar 58 Various accessories are available from the Schneider Automation catalog to aid connection of equipment Cables for the TSX CSA bus are sold in lengths of 100 200 or 500 m TSX SCA62 subscriber socket This passive junction box contains a printed circuit equipped with screw terminals and enables two devices to be connected on the bus 2 x 15 pin female SUB D connectors It includes a line terminator if the subscriber socket is located at the end of the line Example of connection TSX SCA62 ISX CSAs oe bb S VW3 A58306 E J ALTIVAR 58 17 IO rozm I0 ro2mM Connection to Multidrop Bus Example of simplified connection on PLC TSX SCM2214 ALTIVAR 58 ALTIVAR 58 ALTIVAR 58 TSX 47 pk OUO OF Channel 1 C3 4 Note Physical layer with a capacity of 18 drives Example of simplified connection of several ATV58H or ATV58P on PC ALTIVAR 58 ALTIVAR 58 ALTIVAR58 ALTIVAR 58
8. te N output words function 16 H 10 Question Slave 10 No of 1st word Number Number Val of 1st word CRC16 no Hi Lo ofwords ofbytes Hi Lo 1byte 1 byte 2 bytes 2bytes 1 byte 2 bytes 2 bytes Response Slave 10 No of 1st word Number of words CRC16 no Hi Lo Hi Lo 1 byte 1 byte 2 bytes 2 bytes 2 bytes Example write values 15 and 400 in words W400 and W401 of slave 2 Question 02 10 0190 0002 04 000F 0190 CRC16 Response 02 10 0190 0002 CRC16 24 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 1 byte 1 byte 1 byte 2 bytes Response code function code of the request H 80 the most significant bit is set to 1 Error code 1 The function requested is not recognized by the slave 2 The bit and word numbers addresses indicated in the request do not exist in the slave 3 The bit and word values indicated in the request are not permissible in the slave 4 The slave has started to execute the reguest but cannot continue to process it completely CRC16 calculation The CRC16 is calculated on all the bytes of the message by applying the following method Initialize the CRC 16 bit register to H FFFF Enter the first to the last byte of the message CRC XOR
9. to 25 Modbus Protocol 15 ro rozm I0 ro2mM Presentation Installation Presentation The RS485 connection kit includes a 3 m cable eguipped with a 9 pin male SUB D connector and a 15 pin male SUB D connector The RS485 multidrop serial link of the Altivar 58 is used for the following functions Configuration Adjustment Control Supervision The protocol used is Modbus RTU mode The Altivar 58 parameters with their addresses are listed in the attached document Internal communication variables Installation Remove the display module or blanking cover to access the ATV 58 SUB D connector Connect the 9 pin cable connector to the ATV 58 connector 9 pin connector 15 pin connector Connection to Multidrop Bus Connection to RS 485 standard bus Diagram of cable equipped with connectors SUB D 9 SUB D 15 Recommendations Do not connect anything to pins 1 2 5 6 on the 9 pin connector Use a shielded cable with 2 pairs of twisted conductors Connect the reference potentials to each other Maximum length of line 1000 metres Maximum length of tap off 20 metres D B 7 c 14 Do not connect more than 18 stations on one bus Cable routing keep the bus away from the power cables at leas
10. to a slave and waits for its response the master talks to all slaves without waiting for a response broadcasting principle The slaves are numbered from 1 to 31 and number 0 is reserved for broadcasting Master d The master manages the exchanges and only it can take the initiative The master repeats the guestion when there is an incorrectexchange and declaresthe interrogated slave absent if no response is received within a given time envelope Only one device can transmit on the line at any time No slave can send a message unless it is invited to do so Slave i Note Slave j Slave k No lateral communication i e slave to slave can be performed directly The application software of the master must therefore be designed to interrogate one slave and send back data received to the other slave 21 ro rozm I0 ro2mM Modbus Protocol Accessible data The Modbus protocol enables data bits and words to be exchanged between a master and several slaves and checks these exchanges With the ATV 58 only words can be exchanged An output object can be read or written The ATV 58 only contains output objects j Slave i Slave j Master I Modbus Addressing 2 2 o So ES gt Output E words D n 2 2o c kel 3 o go es Slave k Exchanges
Download Pdf Manuals
Related Search