CFW11 - RS232 and RS485 Manual
Contents
1. Address Function Request data field CRC 1 byte 1 byte n bytes 2 bytes Slave response telegram Address Function Answer data field CRC 1 byte 1 byte n bytes 2 bytes 5 2 1 Address The master initiates the communication sending a byte with the address of the slave to which the message is destined When sending the answer the slave also initiates the telegram with its own address The master can also send a message 1o the address O zero which means that the message is destined to all the slaves in the network broadcast In that case no slave will answer to the master 5 2 2 Function Code This field also contains a single byte where the master specifies the kind of service or function requested to the slave reading writing etc According to the protocol each function is used to access a specific type of data In the CFW 11 parameter related data is available as registers of the holding type referenced starting from address 4000 or 4x 5 2 3 Data Field It is a variable size field The format and contents of this field depend on the used function and the transmitted value This field is described together with the function description refer to item 5 4 22 Modbus RTU Protocol 5 2 4 CRC The last part of the telegram is the field for checking the transmission errors The used method is the CRC 16 Cycling Redundancy Check This field is formed by two bytes where first the least si2. 69 45 E 101 65 e 6 06 ACK Acknowledgment 38 26 amp 70 46 F 102 66 E 7 07 BEL Bell 39 27 71 47 G 103 67 g 8 08 BS Backspace 40 28 72 48 H 104 68 h 9 09 HT Horizontal Tab 41 29 73 49 I 105 69 i 10 OA LF Line Feed 42 2A 74 4A J 106 GA 3 11 OB VT Vertical Tab 43 2B T 75 4B K 107 6B k 12 0C FF Form Feed 44 2C P 76 AC L 108 6C I 13 0D CR Carriage Return 45 2D S 77 AD M 109 6D m 14 OE SO Shift Out 46 2E 78 4E N 110 6E n 15 OF SI Shift In 47 2F 4 79 AF o 111 GF o 16 10 DLE Data Link Escape 48 30 0 80 50 P 112 70 p 17 11 DCl Device Control 1 49 31 a 81 51 O 113 7L q 18 12 DC2 Device Control 2 50 32 2 82 52 R 114 72 hd 19 13 DC3 Device Control 3 5l 33 3 83 53 S 115 73 S 20 14 DC4 Device Control 4 52 34 4 84 54 Et 116 74 i 21 15 NAK Negative Acknowledgement 53 85 5 85 55 U 117 75 22 16 SYN Synchronous Idle 54 36 6 86 56 V 118 76 v 23 17 ETB End of Trans Block 55 37 7 87 57 W 119 77 w 24 18 CAN Cancel 56 38 8 88 58 x 120 78 z 25 19 EM End of Medium 57 39 9 89 59 Y 121 79 y 26 1A SUB Substitute 58 3A 90 5A Z 122 7A Z 21 1B ESC Escape 59 3B E 91 5B 123 7B 28 1C FS File Separator 60 3C z 92 5C 124 7C 29 1D GS Group Separator 61 3D 93 5D 125 7D 30 1E RS Record Separator 62 3E gt 94 5E E 126 7E s 31 1F US Unit Separator 63 3F 95 SF 127 7F DEL 31 Appendices Appendix B CRC Calculation Using Tables Next a function using pro
3. 0014h 2 bytes Request Master Response Slave Field Value Field Value Slave Address OFh Slave Address OFh Function 10h Function 10h Initial register high 00h Register high 00h Initial register low 64h Register low 64h Number of registers high 00h Value high 00h Number of registers low 02h Value low 02h Byte Count 04h CRC 01h P100 high 00h CRC 39h P100 low OAh P101 high 00h P101 low 14h CRC EOh CRC 91h 27 Modbus RTU Protocol 5 4 4 Function 43 Read Device Identification It is an auxiliary function that allows the reading of the product manufacturer model and firmware version It has the following structure Request Master Response Slave Slave Address Slave Address Function Function MEI Type MEI Type Reading code Conformity Level Object number More Follows CRC Next object CRC Number of objects Code of the first object Size of the first object Value of the first object n bytes Code of the second object Size of the second object Value of the second object n bytes etc CRC CRC This function allows the reading of three information categories Basic Regular and Extended and each category is formed by a group of objects Each object is formed by a sequence of ASCII characters For the CFW 11 only basic information formed by
4. Slave Field Value Field Value Slave Address Olh Slave Address 01h Function 03h Function 03h Initial register high 00h Byte Count 04h Initial register low 02h P002 high 03h Number of registers high 00h P002 low ESh Number of registers low 02h P003 high 00h CRC 65h P003 low 23h CRC CBh CRC 3Bh CRC 9Ah 5 4 2 Function 06 Write Single Register This function is used to write a value for a single register lt has the following structure the values are always in hexadecimal and each field represents a byte Request Master Response Slave Slave Address Function Slave Address Function Register address high byte Register address low byte Register address high byte Register address low byte Register value high byte Register value low byte CRC Register value high byte Register value low byte CRC CRC CRC Example 2 writing of 900 rpm as the speed reference P0683 assuming a synchronous speed of 1800 rpm for the CFW 11 located at the address 3 M Address 3 03h 1 byte M Parameter number 683 02AB 2 bytes M Parameter value 1000h 2 bytes Request Master Response Slave Field Value Field Value Slave Address 03h Slave Address 03h Function 06h Function 06h Register high 02h _ Register high 02h Register low ABh Register low ABh Value high 10h Value high 10h Value
5. it is necessary that the inverter be programmed to use the speed reference via serial This programming is done by means of parameters PO221 and PO222 This word uses a 13 bit resolution with signal to represent the motor speed M P0683 0000h 0 decimal gt speed reference O rpm M P0683 2000h 8192 decimal gt speed reference synchronous speed Intermediate or higher speed reference values can be programmed by using this scale E g for a 4 pole 1800 rpm synchronous speed motor to obtain a speed reference of 900 rpm one must calculate 1800 rpm 8192 13 bit reference 900 x 8192 900 rom 13 bit reference 1800 13 bit reference 4096 value corresponding to 900 rpm in a 13 bit scale This parameter also accepts negative values to revert the motor speed direction The reference speed direction however depends also on the control word bit 2 setting P0682 M Bit 2 1 and P0683 gt O reference for direct speed rotation M Bit 2 1 and P0683 lt O reference for reverse speed rotation M Bit 2 O and P0683 gt O reference for reverse speed rotation M Bit 2 O and P0683 lt O reference for direct speed rotation P0695 Settings for the Digital Outputs Range 0000h FFFFh Default 0000h Proprieties Net Access groups via HMI 01 PARAMETER GROUPS L 49 Communication L 111 Status Commands Description It allows the control of the digital outputs by means of the network interfaces Serial USB CAN
6. low 00h _ Value low 00h CRC F5h CRC F5h CRC BOh CRC BOh Note that for this function the slave response is an identical copy of the request made by the master 26 Modbus RTU Protocol 5 4 3 Function 16 Write Multiple Registers This function allows writing values for a group of registers which must be in a numerical sequence It can also be used to write in a single register the values are always in hexadecimal and each field represents a byte Request Master Response Slave Slave Address Slave Address Function Function Address of the initial register high byte Address of the initial register high byte Address of the initial register low byte Address of the initial register low byte Number of registers high byte Number of registers high byte Number of registers low byte Number of registers low byte Byte Count field Nr of data bytes CRC Datum 1 high Datum 1 low CRC Datum 2 high Datum 2 low etc CRC CRC Example 3 writing of the acceleration time PO100 equal to 1 0s and the deceleration time PO101 equal to 2 0s of a CFW 11 located at the address 15 M Values converted to hexadecimal Address 15 OFh 1 byte First parameter number 100 0064h 2 bytes Value for the fist parameter 10 000Ah 2 bytes Value for the second parameter 20
7. a a 22 1210727 MES CY T aa SS a aa a a S SS NT PERRI 23 D dime BDelweendMessdgesua Di ATA AA A EIU 23 5 3 CFW 11 OPERATION IN THE MODBUS RTU NETWORK kaka aaa aaa rte e rre e aaa aaa 23 53 1 Available Functions and Response Times disi di du eni ade ci dee ci uu noe edd adu 24 53 2 Dala Addressing and Offset ERR REA EE ai o 24 5 4 DETAILED DESCRIPTION OF THE FUNCTIONS cssssee ee emen enne ne e ne ne re ie n re eere n eene nus 25 5 4 1 Function 03 Read Holding Regisfer sss ness tense senes nnn 25 DAD Function 06 Write Single Register uia ss ertet a ia nb n n v Re dg 26 5 4 3 Function 16 Write Multiple Registers oooonnnnncininncnicnaccccccnnar or onona on rr nana nr rana nro 27 5 4 4 Function 43 Read Device Identification cccicccccceccccccceecccccseecceceesseescessessscssuessssssutsscsssessessunesss 28 Bid Sic GOMMUNIGQHOM EOS N A EEE tots fa Paty ie da sad dote od 29 FAULTS AND ALARMS RELATED TO THE SERIAL COMMUNICATION eee 30 A128 F228 TIMEOUT FOR SERIAL COMMUNICATION iesiceeee ee ee e e eene e ne ne e ne n ern ene e ne nee nenne 30 APPENDIGES 5157 aa da E a i sana AE aa As 31 IABPENIDD AAS GAB Ite OAM EA AA Na S ROO EEE MAS ASSEN M NE EA REEERE AANE RENER ENET Eun cu 31 APPENDIX B CRC CALCULATION USING TABLES JL aka aaa em m e eene enne nee aaa re eene e ne nee nenne 32 APPENDIX C CRC CALCULATION USING DISPLACEMENT OF REGISTERS 0 ccccceecccsesecccseuuseceeueeses
8. it has been used in other applications many times implemented in PLC s and other systems for controlling and monitoring WEG equipment 4 1 Protocol FIELDS M M M SXT Start of Transmission byte Value 02h 2 decimal ETX End of Transmission byte Value 03h 3 decimal ADR Byte of the inverter address in the network programmable via P0308 Value Range from 41h 65 decimal A ASCII to 5Eh 94 decimal ASCII representing the addresses 1 90 in the network Special 1 40h 64 decimal O ASCII It allows the writing or reading of all the equipments connected to the network Special 2 5Fh 95 decimal ASCII gt It allows ONLY writing in all the equipments connected to the network without acceptance or rejection answer COD Telegram code byte Reading 3Ch hexadecimal 60 decimal lt ASCII Writing 3Dh hexadecimal 61 decimal ASCII without saving the parameter in the EEPROM Writing 3Eh hexadecimal 62 decimal gt ASCII saving the parameter in the EEPROM BCC Telegram longitudinal checksum byte EXCLUSIVE OR XOR between all the telegram bytes With the size of 1 byte OOh to FFh hexadecimal DMW Data Master Write Those are the 4 writing bytes the master sends to the slave the first 2 represent the parameter number and the last 2 the value to be written in that parameter PHi Byte representing the parameter number high portion PL
9. left mounting instruction and fixing screw It has the same characteristics as the RS485 01 interface plus a CAN interface for applications where the operation with both interfaces is necessary NA The limit number of devices that can be connected to the network depends also on the used protocol 8 Accessory Kits 2 2 3 Connector Pin Functions The RS485 communication module presents a 4 wire plug in connector XC7 with the following pin assignment Table 2 2 4 wire RS485 connector pin assignment Pin Name Function 1 A Line RxD TxD negative 2 B Line RxD TxD positive 3 GND OV isolated from the RS485 circuit 4 Ground Ground shield 2 2 4 Indications and Switches Term LED M TX LED LED for the indication of data transmission by the inverter in yi y A green color M Termination resistor S1 switch for enabling the termination resistor necessary for the RS485 interface This resistor must be enabled position ON only at the devices located at the extremes of the main bus 2 2 5 Connection with the RS485 Network The following point must be observed for the connection of the inverter using the RS485 interface It is recommended the use of a shielded cable with a twisted pair of wires It is also recommended that the cable has one more wire for the connection of the reference signal GND In cas
10. significant part is transmitted first CRC and nex the most significant part CRC 33
11. three objects is available M Object 00h VendorName always WEG M Object 01h ProductCode Formed by the product code CFW 1 1 plus the inverter rated voltage and current e g CFW 11 220 230 V 10A 8A M Object 02h MajorMinorRevision lt indicates the inverter firmware version in the format VX XX The reading code indicates what information categories are read and if the objects are accessed in sequence or individually The CFW 11 supports the codes O1 basic information in sequence and 04 individual access to the objects The other fields are specified by the protocol and for the CFW11 they have fixed values Example 4 reading of basic information in sequence starting from the object 01h from a CFW 11 located at the address 1 Request Master Response Slave Field Value Field Value Slave Address 01h Slave Address 01h Function 2Bh Function 2Bh MEI Type OEh MEI Type OEh Reading code 01h Reading code 01h Object number 01h Conformity Level 81h CRC 70h More Follows 00h CRC 77h Next object 00h Number of objects 02h Object code 01h Object size 1Bh Object value CFW 11 220 230 V 10A 8A Object code 02h Object size 05h Object value V4 50 CRC B2h CRC 8Fh In this example the value of the objects was not represented in hexadecimal but using the corresponding ASCII characters instead E g for the object 02h the value V4 50 was transmitte
12. 0h 64h 00h 32h 00h 65h 00h 96h SIX ADR COD NUM DMW P0100 50 DMW P0101 150 Parameter Value Parameter Value 00h DCh 00h O h OOh DEh OOh O9h OOh E2h OOh O5h DMW P0220 6 DMW P0222 9 DMW P0226 5 Parameter Value Parameter Value Parameter Value 00h E3h 00h 02h 03h D h DMW P0227 2 ETX BCC Parameter Value Slave answer 4lh 06h ADR ACK Example 4 the writing of the enabling command and the speed reference via serial M Writing telegram without saving in the EEPROM M P0682 0013h control via serial with LOC REM to Remote mode General Enabling and Start Stop 682 in decimal 02AAh M P0683 1000h Speed reference via serial programmed for half the motor synchronous speed 683 in decimal 02ABh Master request 02h 41h 3Dh 02h 02h AAh OOh 13h 02h ABh 10h OOh O3h 7Dh SIX ADR COD NUM DMW 0682 0013h DMW P0683 1000h ETX BCC Parameter Value Parameter Value Slave answer 41h 06h ADR ACK 21 Modbus RTU Protocol 5 MODBUS RTU Protocol The Modbus RTU protocol was initially developed in 1979 Nowadays it is a widely spread open protocol used by several manufactures in many equipments The CFW 11 inverter Modbus RTU com
13. 49 Current Fault Bit 9 0 General Enabling is not active General Enabling active 1 General enabling is active and the inverter is ready to run the motor Bit 10 0 The motor is rotating in reverse mode Speed Direction 1 The motor is rotating in direct mode Bit 11 0 JOG function inactive JOG 1 JOG function active Bit 12 0 Inverter in Local mode LOC REM 1 Inverter in Remote mode Bit 13 0 No Undervoltage Undervoltage 1 With Undervoltage Bit 14 0 PID in manual mode Manual Automatic 1 PID in Automatic mode Bit 15 0 The inverter is not in a fault condition 1 N P0681 Motor Speed in 13 bits Range 32768 32767 Default Proprieties RO Access groups via HMI 01 PARAMETER GROUPS L 49 Communication L 111 Status Commands Description It allows monitoring the motor speed This word uses 13 bit resolution with signal to represent the motor synchronous speed M P0681 0000h 0 decimal motor speed O rpm M P0681 2000h 8192 decimal gt motor speed synchronous speed Intermediate or higher speed values in rpm can be obtained by using this scale E g for a 4 pole 1800 rpm synchronous speed motor if the value read is 2048 0800h then to obtain the speed in rpm one must calculate 8192 1800 rpm Speed in rpm 1800 x 2048 2048 value read in P0681 8192 14 Inverter Programming Speed in rpm 450 rpm Negative values in this para
14. C1 0x81 0x40 0x00 OxCl 0x81 0x40 0x0 OxCO 0x80 0x41 0x00 OxC1 0x81 0x40 0x01 0xC0 0x80 Ox41 0x01 0xC0 0x80 Ox41 0x00 0xC1 0x81 0x40 0x01 OxCO 0x80 0x41 0x00 OxC1 0x81 0x40 0x00 OxC1 0x81 0x40 0x01 0xC0 0x80 0x41 0x01 OxCO 0x80 0x41 0x00 OxC1 0x81 0x40 0x00 OxC1 0x81 0x40 0x01 0xC0 0x80 0x41 0x00 OxC1 0x81 0x40 0x01 0xC0 0x80 Ox41 0x01 OxCO 0x80 0x41 0x00 OxCl 0x81 0x40 f Table of CRC values for low order byte static char auchCRCLo 0x00 OxCO OxC1 0x01 0xC3 0x03 0x02 0xC2 OxC6 0x06 0x07 OxC7 0x05 OxC5 OxC4 0x04 OxCC 0x0C Ox0D OxCD OxOF OxCF OxCE OxOE 0x0A OxCA OxCB Ox0B 0xC9 0x09 0x08 0xC8 OxD8 0x18 0x19 OxD9 0x1B OxDB OxDA 0x1A OXIE OxDE OxDF 0x1F OxDD 0x1D 0x1C OxDC 0x14 0xD4 OxD5 0x15 OxD7 0x17 0x16 0xD6 0xD2 0x12 0x13 OxD3 0x11 OxD1 OxDO 0x10 OxFO 0x30 0x31 OxF1 0x33 0xF3 OxF2 0x32 0x36 OxF6 OxF7 0x37 OxF5 0x35 0x34 OxF4 0x3C OxFC OxFD 0x3D OxFF Ox3F Ox3E OxFE OxFA 0x3A 0x3B OxFB 0x39 OxF9 OxF8 0x38 0x28 OxE8 OxE9 0x29 OxEB 0x2B 0x2A OxEA OxEE Ox2E 0x2F OxEF 0x2D OxED OxEC 0x2C OxE4 0x24 0x25 OxE5 0x27 OxE7 OxE6 0x26 0x22 OxE2 OxE3 0x23 OxE1 0x21 0x20 OxEO OxA0 0x60 0x61 OxA1 0x63 0xA3 OxA2 0x62 0x66 OxA6 OxA7 0x67 OxA5 0x65 0x64 OxA4 0x6C OxAC OxAD 0x6D OxAF Ox6F O
15. DO Osa es ani rt ao od o dde dcs didt d sd m 12 POS T6 SERIALINTERFACE STATUS esla dE 13 PO680 LOGI6 STATUS O DEED DE DD DE 13 P068 T MOTORSPEEDJIN do ID IE 14 P0682 CONTROL WORD VIA SERIAL USB JL aaa Hem eee ene ne e ne n ene ee e ne ne e nenne 15 P0683 SPEED REFERENCE VIA SERIAL USB sssssssse He eee eee nenne e ne ne e eene e ne nn need 16 P0695 SETTINGS FOR THE DIGITAL OUTPUTS ssssssese e e e eene re aaa rene ne e ie e ee le e e d e e e rende 16 P096 VALUE T FORANALO G OUTPUTS acta horas e etae reete waa tie nort teh epa tmr ld lla vase Sala vag lo a LI nc 17 POA9 7 VALUE Z EOR ANALOG OUTPUTS ais Kk i ak A Ka a i k o i i A i n 17 P0698 VALUE 3 FOR ANALOG OUTPUTS He ee een e nn ne e ie e re aaa e e ene e aaa aaa aaa 17 P0699 VALUEA EOR ANALOG OUTPUTS i i ai a ai i i i a S A i i E i E E 17 MEM Dd Gode aa Sa aa bese vn K a a jo V di D i i i a as Sai 19 4 1 PROTOOGOBEIEEDS t e ee ool et a a a sa ao sa S as co 19 AD MEKEGRAMILORMAT i e dm cc A Me du Em LRL ee E dU te Metus 20 ALA elio elass eet nonlinear mmn 20 422 MW lngelegramasessote n e E RR RR E RR RR RE RR E RR RERO 20 4 3 EXAMPLE OF TELEGRAMS USING THE TP PROTOCOL LL aaa a aaa Hee eene emen ne e aaa aaa 20 5 MODBUS RTU PROTOGOL S a a E S REED 22 5 1 TRANSMISION MODES do 22 O22 RIUSMOBDEMESSAGE RUE es tsa nal a Maia 22 DAA ARAS a a I IE AI a a e RE e 22 A Al JA d i dolci AS 22 A O Lo E le RR Sa L aa aaa io a i a a a a a
16. Disable via Start Stop 2 Disable via General Enable 3 Change to Local 4 Change to LOCAL keeping the commands and the reference 5 Fault trip Proprieties CFG Net Access groups via HMI 01 PARAMETER GROUPS L 49 Communication L 111 Status Commands Description It allows the selection of the action to be executed by the inverter when a communication error is detected Table 3 1 Parameter P0313 options Options Description O Inactive No action is taken and the inverter remains in the existing status 1 Disable via Start Stop A stop command with deceleration ramp is executed and the motor stops according to the programmed deceleration ramp 2 Disable via General The inverter is disabled by removing the General Enable Enabling and the motor coasts to stop 3 Change to Local The inverter commands change to Local 4 Change to LOCAL The inverter is changed to the local mode However keeping the the enabling and reference commands received via commands and the the network in case the inverter had been reference programmed for start stop via HMI or 3 wire and reference via HMI or electronic potentiometer are kept in the local mode 5 Fault Trip Instead of an alarm a communication error causes a fault at the inverter so that it becomes necessary to perform the inverter fault reset in order to get it back to normal operation It is considered a communication
17. E Situation P0223 FORWARD REVERSE Selection LOCAL Situation P0224 Run Stop Selection LOCAL Situation P0225 JOG Selection LOCAL Situation P0226 FORWARD REVERSE Selection REMOTE Situation P0227 Run Stop Selection REMOTE Situation P0228 JOG Selection REMOTE Situation These parameters are used in the configuration of the command source for the CFW 11 inverter local and remote situations In order that the inverter be controlled through the Serial interface one of the the options Serial USB available in these parameters must be selected The detailed description of these parameters is found in the CFW 11 Programming Manual P0308 Serial Address Range 1 to 247 Default 1 Proprieties CFG Serial Access groups via HMI 01 PARAMETER GROUPS L 49 Communication L 1113 Serial RS232 485 Description It allows the programming of the address used for the inverter serial communication It is necessary that each device in the network has an address different from all the others The valid addresses for this parameter depend on the protocol programmed in PO312 M P0312 1 TP gt Valid addresses 1 to 30 M P0312 2 Modbus RTU Valid addresses 1 to 247 10 Inverter Programming P0310 Serial Communication Rate Range O 9600 bits s Default O 1 19200 bits s 2 38400 bits s 3 57600 bits s Proprieties CFG Serial Access groups via HMI 01 PA
18. INVERTER PROGRAMMING Lake aaa aaa aaa aaa aaa saaa aaa 10 3 1 SYMBOLS FOR THE PROPRIETIES DESCRIPTION 00 cc ccccceecccceeecceceeuececseuescceeueseseuueeccssuaesecseueesessuneeseseuneseeeenees 10 POTOS TST 2ND RAMPSELEGTION S nd 10 P0220 EOGAE REMOTESEIEGHON SOURGE eee e eer eR eR E ER EE ERN REN E ran 10 P0221 SPEED REFERENCE SELECTION LOCAL SITUATION iiissesse mH ee eee ee eene e ne eee nene 10 P0222 SPEED REFERENCE SELECTION REMOTE SITUATION esse meme eene e eene nenne 10 P0223 FORWARD REVERSE SELECTION LOCAL SITUATION cicsee mme emen ene nee nenne 10 P0224 RUN STOP SELECTION FOGCAE SITUATION a dt aaa a 10 P0225 JOG SELECTION TOCALSI UAT Na oa 10 P0226 FORWARD REVERSE SELECTION REMOTE SITUATION occonocccncnnnoccnononocnnononicnnonerinonnnorononnanicnonnnninnns 10 PO22 7 RUN STOP SELECTON REMOTE MUA a i i a a a ai S 10 P0228 JOG SELECTION REMOTE SITUATION a aaa aaa eme n eee nene e nenne er aaa aaa ee enne rere nenne 10 P0308 SERIAL ADDRESS metere e lu dave Su a ds Saus o aaa a a 10 PO310 SERIAL COMMUNICATION RATE eee e ne nne ne e ne e re esee e ns nn e de n e n s n n e ne e denne 11 PO311 SERIAL INTERFACE BYTE CONFIGURATION cccssssee Hee e nee eene e ie e rn e ne e ne e re aaa 11 PO312 5ERIALBRO OC Ola a S AA a A a a ON 11 P0313 ACTION IN CASE OF COMMUNICATION ERROR iiisses Hee eene e ne ne e ne e re eene e de ne e ien 12 PO SIS SERIAL ATC A
19. Motors Energy Automation Coatings Serial CFW 11 Communication Manual Language English AH EBENEN Ella y 5 RS232 RS485 Serial Communication Manual Series CFW 11 Language English Document Number 0899 5741 03 Publication Date 01 2010 ABOUT THIS MANUAL i n a a nih eee 5 ABBREVIATIONSHANIDIDEFINITIONS oca k ds od de doas e k dde dde Heo k i ak k i ale n 5 IN RERICAISREPRESENTATION LL ses a a a a a AAA A SA 5 1 INTRODUCTION TO SERIAL COMMUNICATION oooccccnocccncnnnoccnnnnononcnonocoronononorononnnorononnnrrnnnnnnornnnnnnornnnno 6 25 ACCESO Mill cota a orice Bes taut deut cca dt ieee dad tia ta LN SLM DL ur 7 2 1 RS23 2 a aa ia E 7 O MEN EAS OS P S 7 DADO Connector Pin FUNCHAL a as a O O O O as 7 ZUM handidionstana SWIHCH8s A dod Ted ae i Mata Da Det Dee DeL De tea Daa De De enh Deu D De a E oa 7 244 Connection with ME RS 2 IZ NOR dd reed ee 7 21 5 Cables for the RS232 Connection occccccccccceccccccteeccccuueeccccesececseescscsuseccessuesssssssuessssssessssssetsesnans 8 DEP SRS 185 coo en M nm D paar doa a dp oci dna rna rco 8 ITA O RSA ODA IKS REM Det 6 222 KICAN ARS465 QT i iii iia 6 22 6 o aig FInsbkmncHons ise de a a A el dada na aller ar 9 224 Jnacalonsanad SWHCROS sa ainiai saitas asa as aga o as og o e tct citet aaa 9 225 Connection with the R 485 Network ether hns se Aaaa Aaaa aaa aaa Aaaa aaa aaa aaa rnaar nnna aaa 9 2 94 O x atr e adr Ad Aaa d ad aaa a I M i Maa A 9 3
20. RAMETER GROUPS L 49 Communication L 113 Serial RS232 485 Description It allows the programming of the wished communication rate for the serial interface in bits per second This rate must be the same for all the devices connected to the network P0311 Serial Interface Byte Configuration Range O 8 data bits no parity 1 stop bit Default O 8 data bits parity even 1 stop bit 2 8 data bits parity odd 1 stop bit 3 8 data bits no parity 2 stop bits 4 8 data bits parity even 2 stop bits 5 8 data bits parity odd 2 stop bits Proprieties CFG Serial Access groups via HMI 101 PARAMETER GROUPS L 49 Communication L 113 Serial RS232 485 Description It allows the programming of the number of data bits parity and s op bits of the serial interface bytes This configuration must be identical for all the devices connected to the network P0312 Serial Protocol Range TP Default 2 2 Modbus RTU Proprieties CFG Serial Access groups via HMI 01 PARAMETER GROUPS L 49 Communication L 113 Serial RS232 485 Description It allows the selection of the desired protocol for the serial interface The detailed description of those protocols appears in the next topics of this manual Inverter Programming P0313 Action in Case of Communication Error Range O Inactive Default 0 1
21. Telegram Table 5 1 Communication rates and the time periods involved in the telegram transmission Communication rate Tion Tix 9600 bits s 1 146 ms 4 010 ms 19200 bits s 573 us 2 005 ms 38400 bits s 573 us 2 005 ms 57600 bits s 573 us 2 005 ms M Ti bits Time for transmitting one byte of the telegram Wl Tbemeen byes Time between bytes must not be longer than T 35 M Tas Minimum interval to indicated beginning and end of a telegram 3 5 x T 4 5 3 CFW 11 Operation in the Modbus RTU Network The CFW 11 has the following characteristics when operated in Modbus RTU network M Network connection via RS 232 or RS 485 serial interface refer to item 2 M Address communication rate and byte format defined by means of parameters refer to item 3 M Itallows the inverter programming and control via the access to parameters 3 The time of 11 bits is always considered as the time for the transmission of a byte even if in the parameter PO311 a telegram format where each byte has only 10 bits be programmed 29 Modbus RTU Protocol 5 3 1 Available Functions and Response Times In the Modbus RTU specification are defined the functions used to access different types of registers In the CFW 11 the parameters have been defined as being Ao ding type registers In order to access those registers the following services or functions have been made available M Read Coils Description reading of bit blocks of the co type Function c
22. able 5 2 Modbus RTU interface data address Parameters Modbus data address Parameter number Decimal Hexadecimal P0000 0 0000h P0001 0001h P0100 100 0064h 2 NOTE Wa A M All the parameters are treated as holding type registers Depending on the master that is used those registers are referenced staring from the base address 40000 or 4x In this case the address that must be programmed in the master for a parameter is the address showed in the table above added to the base address Refer to the master documentation to find out how to access holding type registers M Besides the parameters other types of data as bit markers word or float can also be accessed using the Modbus RTU interface Those markers are used mainly by the SoftPLC function available for the CFW 11 Refer to the SoftPLC Manual for the description of those markers as well as for the addresses via Modbus 54 Detailed Description of the Functions A detailed description of the functions available in the CFW 11 for the Modbus RTU is provided in this section In order to elaborate the telegrams it is important to observe the following M The values are always transmitted in hexadecimal M The address of a datum the number of data and the value of registers are always represented in 16 bits Therefore it is necessary to transmit those fields using two bytes superior Aigh and inferior ow M The telegrams for request as
23. aces Accessory Kits 2 Accessory Kits In order to make available a serial interface for the CFW 11 it is necessary to use one of the RS232 or RS485 communication kits described next Information on the installation of those kits can be obtained in the guide that comes with the kit 2 1 RS232 2 1 1 RS232 01 Kit WEG part number 10051958 Composed by the RS232 communication module drawing at the left mounting instructions and fixing screw The interface follows the ElA RS232C standard It allows the connection from the CFW11 to the network master point to point Maximum distance for the devices connection of 10m K AN RR 2 1 2 Connector Pin Functions The RS232 communication module presents a male DB9 connector XC8 with the following pin assignment Table 2 7 RS232 DB9 connector pin assignment Name Function Not connected RX Data reception TX Data transmission Not connected a GND Reference for the RS232 circuit Not connected Not connected Not connected 7 Not connected 5 NO 00 NM OS On BY GO Nh 2 1 3 Indications and Switches M TX LED LED for the indication of data transmission by the inverter in green color 2 1 4 Connection with the RS232 Network M The inverter RX and TX signals must be respectively connected to the master TX and RX signals besides the reference signal GND connection M The RS232 interface is very s
24. d as being five ASCII characters which in hexadecimal have the values 56h V 34h 4 2Eh 35h 5 and 30h 0 28 Modbus RTU Protocol 5 4 5 Communication Errors Communication errors may occur in the transmission of telegrams as well as in the contents of the transmitted telegrams Depending on the type of error the CFW 11 may or not send a response to the master When the master sends a message for an inverter configured in a specific network address the inverter will not respond to the master if the following occurs M Parity bit error M CRC error M Jimeout between the transmitted bytes 3 5 times the transmission time of a byte In those cases the master must detect the occurrence of the error by means of the f meouf while waiting for the slave response In the event of a successful reception during the treatment of the telegram the inverter is able to detect problems and send an error message indicating the kind of problem found M Invalid function Error code 1 The requested function has not been implemented for the equipment M Invalid datum address Error code 2 the datum address parameter does not exist M Invalid datum value Error code 3 It occurs in the following situations The value is out of the permitted range n attempt to write in a datum that cannot be changed reading only register NOTE j gw It is important that it be possible to identify at the master what type of er
25. e the cable does not have the additional wire then the GND signal must be left disconnected The cable must be laid separately and far away if possible from the power cables All the network devices must be properly grounded preferably at the same ground connection The cable shield must also be grounded Enable the termination resistors only at two points at the extremes of the main bus even if there are derivations from the bus K RR RR 2 3 ANYBUS CC The RS232 and RS485 interfaces can also be made available by using the Anybus CC kits available for RS232 or RS485 Refer to the Anybus CC Communication Manual for information on those kits Inverter Programming 3 Inverter Programming Next only the CFW 11 frequency inverter parameters related to the serial communication will be presented 3 1 Symbols for the Proprieties Description RO Reading only parameter CFG Parameter that can be changed only with a stopped motor Net Parameter visible on the HMI if the inverter has the network interface installed RS232 RS485 CAN Anybus CC Profibus or if the USB interface is connected Serial Parameter visible on the HMI if the inverter has the RS232 or RS485 interface installed USB Parameter visible on the HMI if the inverter USB interface is connected P0105 1st 2nd Ramp Selection P0220 LOCAL REMOTE Selection Source P0221 Speed Reference Selection LOCAL Situation P0222 Speed Reference Selection REMOT
26. error for the serial interface only the Timeout event A128 alarm F228 fault This Timeout is programmed via the PO314 parameter The actions described in this parameter are executed by means of the automatic writing of the respective bits on the control via serial USB parameter P0682 In order to be effective it is necessary that the inverter be programmed to be controlled via serial This programming is done by means of parameters PO220 to P0228 P0314 Serial Watchdog Range OO 444 92005 Default 0 0s Proprieties CFG Serial Access groups via HMI 01 PARAMETER GROUPS L 49 Communication L 113 Serial RS232 485 Description It allows the programming of a time limit for the detection of serial interface communication error In case the inverter remains without receiving valid telegrams longer than the time programmed in this parameter it will be considered that a communication error happened the alarm A128 will be showed on the HMI or F228 fault depending on the programming done at P0313 and the option programmed in PO313 will be executed After being powered up the inverter starts counting this time from the first received valid telegram The value 0 0 disables this function 12 Inverter Programming P0316 Serial Interface Status Range O Inactive Default Active 2 Watchdog error Proprieties RO Access groups via HMI 01 PARAMETER GROUPS L 49 Communicatio
27. etc This parameter cannot be changed via HMI Each bit of this parameter corresponds to the desired value for a digital output In order to have the correspondent digital output controlled according to this content it is necessary that its function be programmed for P0695 Content at parameters PO275 to P0280 16 Inverter Programming Bits 15t05 4 3 2 1 0 A gt O O O O O Function ES Tu mmm 5 oA EE 6 6 Eo 6 ZO o i i i c AOIBGAISAISOIZSO Table 3 5 PO695 parameter bit functions Bits Values Bit O 0 DO output open Setting for DO1 RL1 1 DO output closed Bit 1 0 DO2 output open Setting for DO2 RL2 1 DO2 output closed Bit 2 0 DO3 output open Setting for DO3 RL3 1 DOS output closed Bit 3 0 DO4 output open Setting for DO4 1 DO4 output closed Bit 4 0 DO5 output open Setting for DO5 1 DO5 output closed Bits 5 to 15 Reserved Range 32768 32767 Default 0 Proprieties Net Access groups via HMI 01 PARAMETER GROUPS L 49 Communication L 111 Status Commands Description It allows the control of the analog outputs by means of network interfaces Serial USB CAN etc This parameter cannot be changed via HMI The value written in those parameters is used as the analog output value providing that the function for the desired analog ou
28. ge Value 15h 21 decimal 19 TP Protocol 4 2 Telegram Format Next the format of the telegrams for reading and writing in the parameters will be presented lt is important to realize that each telegram in the TP protocol allows the reading or writing of up to 6 parameters each time Telegrams with format error or incorrect BCC will be ignored by the inverter which will not send an answer to the master 4 2 1 Reading Telegram Master STX ADR COD NUM DMR DMR ETX BCC M COD code for reading gt 3Ch hexadecimal 60 decimal lt ASCII M NUM number of read parameters Range from 1 6 M DMR number of the requested parameter The number of DMR s must be equal to the value configured in the NUM byte Slave CFW 11 ADR DSV_ DSV BCC or ADR NAK M DSV value of the requested parameter The number of DSV s must be equal to the value configured in the NUM byte Remembering that DMR DSV PHi PLo VHi VLo 4 2 2 Writing Telegram Master SIX ADR COD NUM BMW DMW ETX BCC M COD code for writing 3Eh hexadecimal 62 decimal gt ASCII gt saving in the EEPROM 3Dh hexadecimal 61 decimal ASCII gt without saving in the EEPROM M NUM number of writing parameters Range from 1 6 M DMW number and content for t
29. gnificant byte is transmitted CRC and then the most significant CRC The CRC calculation form is described in the protocol specification however information for its implementation is also supplied in the appendices B and C 5 2 5 Time Between Messages In the RTU mode there is no specific character that indicates the beginning or the end of a telegram The indication of when a new message begins or when it ends is done by the absence of data transmission in the network for a minimum period of 3 5 times the transmission time of a data byte 11 bits Thus in case a telegram has initiated after the elapsing of this minimum time the network elements will assume that the first received character represents the beginning of a new telegram And in the same manner the network elements will assume that the telegram has reached its end when after receiving the telegram elements this time has elapsed again If during the transmission of a telegram the time between the bytes is longer than this minimum time the telegram will be considered invalid because the inverter will discard the bytes already received and will mount a new telegram with the bytes that were being transmitted For communication rates higher than 19200 bits s the used times are the same as for that rate The next table shows us the times for different communication transmission rates Tasx Thetween bytes Tasx Transmission Signal Time r T11 bits
30. gramming language C is presented which implements the CRC calculation for the Modbus RTU protocol The calculation uses two tables to supply pre calculated values of the necessary displacement for the calculation The algorithm was obtained from and is explained in the documents referred to in the item 5 Table of CRC values for high order byte static unsigned char auchCRCHi 0x00 OxC1 0x81 0x40 0x01 0xC0 0x80 Ox41 0x01 0xC0 0x80 Ox41 0x00 OxC1 0x81 0x40 0x01 OxCO 0x80 0x41 0x00 OxC1 0x81 0x40 0x00 OxC1 0x81 0x40 0x01 0xC0 0x80 0x41 0x01 OxCO 0x80 0x41 0x00 OxC1 0x81 0x40 0x00 OxC1 0x81 0x40 0x01 0xC0 0x80 0x41 0x00 OxC1 0x81 0x40 0x01 0xC0 0x80 Ox41 0x01 0xC0 0x80 Ox41 0x00 OxC1 0x81 0x40 0x01 OxCO 0x80 0x41 0x00 OxC1 0x81 0x40 0x00 OxC1 0x81 0x40 0x01 0xC0 0x80 0x41 0x00 0xC1 0x81 0x40 0x01 0xC0 0x80 0x41 0x01 0xC0 0x80 0x41 0x00 0xC1 0x81 0x40 0x00 OxC1 0x81 0x40 0x01 OxCO 0x80 Ox41 0x01 0xC0 0x80 Ox41 0x00 OxC 0x81 0x40 0x01 OxCO 0x80 0x41 0x00 OxC1 0x81 0x40 0x00 0xC1 0x81 0x40 0x01 0xC0 0x80 0x41 0x01 OxCO 0x80 0x41 0x00 OxC1 0x81 0x40 0x00 OxC1 0x81 0x40 0x01 0xC0 0x80 0x41 0x00 OxC1 0x81 0x40 0x01 OxCO 0x80 Ox41 0x01 OxCO 0x80 Ox41 0x00 OxC1 0x81 0x40 0x00 OxC1 0x81 0x40 0x01 0xC0 0x80 0x41 0x01 0xC0 0x80 Ox41 0x00 OxC1 Ox81 0x40 0x01 0xCO 0x80 0x41 0x00 Ox
31. he parameter The number of DMW s must be equal to the value configured in the NUM byte Slave CFW 1 1 ADR ACK or ADR NAK Remembering that DMW PHi Plo VHi VLo 4 3 Example of Telegrams Using the TP Protocol All the next examples consider that the inverter is programmed with the address 1 PO308 1 consequently the field ADR is sent with the value 41h refer to table 1 1 Example 1 the reading of two inverter parameters M Motor speed P0002 assuming P0002 at 1200rpm 04BOh M Motor current P0003 assuming P0003 at 5 0A 0032h 20 TP Protocol Master 02h 41h 3Ch 02h 00h 02h 00h 03h 03h 7Fh SIX ADR COD NUM DMR P0002 DMR P0003 ETX BCC Parameter Parameter Slave CFW 1 1 4lh 04h BOh 00h 32h C7h ADR DSV 1200 DSV 50 BCC Value Value Example 2 To program 6 parameters for the inverter operation KL ISLISL EIL ISL FSI Writing telegram saving in the EEPROM P0100 50 100 in decimal 0064h 50 in decimal 0032h P0101 150 101 in decimal 0065h 150 in decimal 0096h P0220 6 220 in decimal OODChh 6 in decimal 0006h P0222 9 222 in decimal OODEh 9 in decimal 0009h P0226 5 226 in decimal OOE2h 5 in decimal 0005h P0227 2 227 in decimal OOE3h 2 in decimal 0002h Master request 02h 41h 3Eh 06h 0
32. ing field correct otherwise it will be considered that there was any problem in the serial communication The time counting initiates after the reception of the first valid telegram This function can be used by any serial protocol supported by the inverter After the timeout for serial communication is identified the alarm A128 or the fault F228 depending on the P0313 programming will be signalized through the HMI In case of alarms if the communication is reestablished and new valid telegrams are received the alarm indication will be removed from the HMI Possible Causes Correction M Verify factors that could cause failures in the communication cables installation and grounding M Make sure that the master sends telegrams to the inverter in intervals shorter than the programmed in P0314 M Disable this function in PO314 30 Appendices I APPENDICES Appendix A ASCII Table Table 1 1 ASCII characters Dec Hex Chr Dec Hex Chr Dec Hex Chr Dec Hex Chr 0 00 NUL Null char 32 20 Sp 64 40 Q 96 60 j 1 01 SOH Start of Header 29 21 65 41 A 97 61 a 2 02 STX Start of Text 34 22 66 42 B 98 62 b 3 03 ETX End of Text 35 23 67 43 i 99 63 a 4 04 EOT End of Transmission 36 24 68 44 D 100 64 d 5 05 ENQ Enquiry 34 25
33. lgorithm for the calculation of the Modbus RTU communication CRC using displacement of registers is described in this item The algorithm was obtained from and is explained in the documents referred to in the item 5 The CRC calculation is initiated by first loading a 16 bit variable referenced from now on as CRC variable with the value FFFFh Afterwards the following routine is executed step by step l 4 5 The first byte of the message is submitted only the data bits start bit parity and stop bit are not used to an XOR Exclusive OR logic with the 8 less significant bits of the CRC variable returning the result in the CRC variable itself Then the CRC variable is shifted one position to the right towards the less significant bit and the position of the most significant bit is filled with O zero After this shifting the fag bit the bit that was shifted out of the CRC variable is analyzed occurring the following m Ifthe bit value is O zero nothing is done m If the value of the bit is 1 the content of the CRC variable is submitted to an XOR logic with a constant value of ADO1h and the result is returned to the CRC variable The steps 2 and 3 are repeated until eight shifts have been done The steps 1 to 4 are repeated using the next byte of the message until all the message has been processed The final content of the CRC variable is the CRC field value that is transmitted at the end of the telegram The less
34. meter indicate motor rotating in counterclockwise sense of rotation P0682 Control Word via Serial USB Range 0000h FFFFh Default 0000h Proprieties Serial USB Access groups via HMI 01 PARAMETER GROUPS L 49 Communication L 111 Status Commands Description It is the inverter serial interface Control word This parameter can only be changed via serial interface or via USB For the other sources HMI CAN etc it behaves like a reading only parameter In order to have those commands executed it is necessary that the inverter be programmed to be controlled via serial This programming is done by means of parameters PO105 and P0220 to P0228 Each bit of this word represents an inverter command that can be executed Bits 15 to 8 7 6 5 4 3 2 1 0 2 6 o O g gt o D o a 2 lt D O Function 9 PE S Ies ez 96 PE 9 O O O 3 o ea wv gt 5 oE O og o 216 32 9 8 A 3 Table 3 4 Parameter P0682 bit functions Bits Values Bit O O It stops the motor with deceleration ramp Start Stop 1 The motor runs according to the acceleration ramp until reaching the speed reference value Bit 1 O It disables the inverter interrupting the supply for the motor General Enabling 1 It enables the inverter allowing the motor operation Bit 2 0 To run the motor in a direction opposed to the speed reference Direction of Rota
35. munication was developed based on the following documents M MODBUS Protocol Reference Guide Rev J MODICON June 1996 M MODBUS Application Protocol Specification MODBUS ORG May 8 2002 M MODBUS over Serial Line MODBUS ORG December 2 2002 In those documents is defined the format of the messages used by the elements that are constituent parts of the Modbus network the services or functions that can be made available and also how those elements exchange data in the network 5 1 Transmission Modes Two transmission modes are defined in the protocol specification ASCII and RTU The modes define the way the message bytes are transmitted It is not possible to use the two transmission modes in the same network The CFW 11 frequency inverter uses only the RTU mode for the telegram transmission The bytes are transmitted in hexadecimal format and its configuration depends on the programming done by means of P0311 5 2 RTU Mode Message Structure The Modbus RTU structure uses a master slave system for message exchange It allows up to 247 slaves but only one master Every communication begins with the master making a request to a slave which answers to the master what has been asked In both telegrams request and answer the used structure is the same Address Function Code Data and CRC Only the data field can have a variable size depending on what is being requested Master request telegram
36. n L 113 Serial RS232 485 Description It makes it possible to establish if the RS232 or RS485 serial interface board is properly installed and if the serial communication presents errors Table 3 2 P0316 parameter values Options Description O Inactive Serial interface inactive lt occurs when the inverter does not have the RS232 RS485 board installed Active RS232 RS485 interface board installed and acknowledged 2 Watchdog Error Active serial interface but a serial communication error has been detected Alarm A128 Fault F228 P0680 Logic Status Range 0000h FFFFh Default Proprieties RO Access groups via HMI 01 PARAMETER GROUPS L 49 Communication L 111 Status Commands Description It allows the inverter status monitoring Each bit represents a specific status Bits 15 14 13 12 11 10 9 8 7 6 5 4 3 to 0 9 o o o c E Se RE c 6 o 2 2 3 2 2 a 5 o 9 2 5 o 5 E o Function lt 2 lu o o 5 929 S a o ui eO c D no me 8 o gt oz 9 o E as o 2 o 2 O CY O ooco a oto 0 Z 5 c me Q o c gt E O o O k gt o ME ME SEE E MP o E EE 5 L gt gt S 5 O 5 SE O lt a 13 Inverter Programming Table 3 3 Parameter P0680 functions Bits Values Bits O to 4 Reserved Bit 4 0 Quick stop command is no
37. o Byte representing the parameter number low portion VHi Byte representing the parameter content high portion VLo Byte representing the parameter content low portion E g To write 1FFFh in the speed reference P0683 gt PHi 02h PLo ABh VHi 1Fh VLo FFh DMR Data Master Read Those are the 2 reading bytes the master sends to the slave representing the parameter to be read PHi Byte representing the parameter number high portion PLo Byte representing the parameter number low portion E g to read the value of the output voltage parameter P0007 gt PHi OOh PLo 07h NUM This is the byte that represents the number of DMW s or DMR s to be transmitted according to the telegram COD Range 1 6 decimal DSV Data Slave Value Those are the 2 bytes the slave sends to the master after a request from a master reading parameter representing the content of the requested parameter VHi Byte representing the high portion of the parameter to be written VLo Byte representing the low portion of the parameter to be written Eg Answer to the inverter logic status parameter P0680 reading request gt VHi 13h VLo OOh ACK Slave acknowledgment byte after a master writing Value 06h 6 decimal NAK Slave rejection byte after a master reading or writing It may occur when the master request a reading or writing from an inexistent parameter or the value to be written is out of the permitted value ran
38. ode 01 M Read Discrete Inputs Description reading of bit blocks of the discrete inpurtype Function code 02 M Read Holding Registers Description reading of register blocks of the holding register type Function code 03 M Read Input Registers Description reading of register blocks of the input register type Function code 04 M Write Single Coif Description writing in a single bit of the co type Function code 05 M Write Single Register Description writing in a single register of the ho ding type Function code 06 M Write Multiple Coils Description writing in bit blocks of the co type Function code 15 M Write Multiple Registers Description writing in register blocks of the holding register type Function code 16 M Read Device Identitication Description identitication of the drive model Function code 43 The CFW 11 response time from the end of transmission of the master until the response of the slave ranges from 2 to 10 ms for any of the functions above 5 3 2 Data Addressing and Offset The CFW 11 data addressing is done with offset equal to zero i e the address number is equivalent to the given number The parameters are made available starting from the address O zero The next table illustrates the addressing of the parameters which can be accessed as holding type registers Functions used to get access to data used by the SoftPLC function 24 Modbus RTU Protocol T
39. ror occurred in order to be able to diagnose problems during the communication In the event of any of those errors the slave must send a message to the master indicating the type of error that occurred The error messages sent by the slave have the following structure Request Master Response Slave Slave Address Slave Address Function Function with the most significant bit in 1 Data Error code CRC CRC CRC CRC Example 5 The master requests to the slave at the address 1 the writing in the parameter 99 nonexistent parameter Request Master Response Slave Field Value Field Value Slave Address 01h Slave Address 01h Function 06h Function 86h Register high 00h Error code 02h Register low 63h CRC C3h Value high 00h CRC4 Ath Value low 00h CRC 79h CRC D4h 29 Faults and Alarms Related to the Serial Communication 6 Faults and Alarms Related to the Serial Communication A128 F228 Serial Communication Timeout Description It is the only alarm fault related to the serial communication It indicates that the inverter has stopped receiving valid serial telegrams for a period longer than the programmed in P0314 Working The parameter PO314 allows the programming of a time during which the inverter must receive at least one valid telegram via the RS 232 or RS 485 serial interface with address and error check
40. seuesecseuneseeseneeseeees 33 About this Manual About this Manual This manual supplies the necessary information for the operation of the CFW 11 frequency inverter using the RS232 and RS485 serial interfaces This manual must be used together with the CFW 11 user manual Abbreviations and Definitions ASCII American Standard Code for Information Interchange CRC Cycling Redundancy Check ElA Electronic Industries Alliance RTU Remote Terminal Unit Numerical Representation Decimal numbers are represented by means of digits without suffix Hexadecimal numbers are represented with the letter h after the number Introduction to Serial Communication 1 Introduction to Serial Communication In a serial interface the data bits are sent sequentially through a communication channel or bus Several technologies use the serial communication for data transfer including the RS232 and RS485 interfaces The directions that specify the RS232 and RS485 standards however do neither specify the character format nor its sequence for the data transmission and reception Therefore besides the interface it is also necessary to identify the protocol used for the communication Among the several existent protocols one used a lot in the industry is the Modbus RTU protocol In the sequence the characteristics of the RS232 and RS485 serial interfaces available for the CFW 11 will be presented as well as the protocols for the use of those interf
41. t activated Quick Stop Activated 1 Inverter is executing quick stop command Bit 5 0 The inverter is configured to use as acceleration and deceleration ramp for the motor the Second Ramp first ramp programmed at the parameters PO100 and P0101 1 The inverter is configured to use as acceleration and deceleration ramp for the motor the second ramp programmed at the parameters PO102 and P0103 Bit 6 0 Inverter operating normally In configuration mode 1 Inverter in configuration mode Indicates a special condition when the inverter cannot be enabled Executing the self tuning routine Executing guided start up routine Executing the HMI copy function Executing the flash memory card guided routine There is a parameter setting incompatibility Without power supply at the inverter power section Note It is possible to obtain the exact description of the special operation mode ot parameter P0692 KA KR ERE Bit 7 0 The inverter is not in alarm condition Alarm condition 1 The inverter is in alarm condition Note The alarm number can be read by means of the parameter P0048 Current Alarm Bit 8 0 The motor is stopped Ramp Enabled RUN 1 The inverter is driving the motor at the set point speed or executing either the acceleration or the deceleration ramp Fault condition Any fault has been recorded by the inverter ote The fault number can be read by means of the parameter P00
42. tion 1 To run the motor in the direction indicated by the speed reference Bit 3 0 It disables the JOG function JOG 1 lt enables the JOG function Bit 4 0 The inverter goes to the Local mode LOC REM 1 The inverter goes to the Remote mode Bit 5 O The inverter uses as acceleration and deceleration ramp for the motor the first ramp Second Ramp Use times programmed at the parameters PO100 and P0101 The inverter uses as acceleration and deceleration ramp for the motor the second ramp times programmed at the parameters PO102 and P0103 Bit 6 0 Quick Stop command not activated Quick Stop 1 Quick Stop command activated Obs when the control modes V f or VVW are selected the use of this function is not recommended Bit 7 0 No function Fault reset 1 If in a fault condition then it executes the inverter reset Bits 8 to 15 Reserved 15 Inverter Programming P0683 Speed Reference via Serial USB Range 32768 32767 Default 0 Proprieties Serial USB Access groups via HMI 01 PARAMETER GROUPS L 49 Communication L 111 Status Commands Description It allows the programming of the speed reference for the inverter via the serial interface This parameter can only be changed via serial interface or via USB For the other sources HMI CAN etc it behaves like a reading only parameter In order to have the reference written in this parameter working
43. tput be programmed for Content P0696 P0697 P0698 P0699 in the parameters P0251 PO254 P0257 or P0260 The value must be written in a 15 bit scale 7FFFh 32767 to represent 10096 of the output desired value i e M P0696 0000h 0 decimal analog output value O 96 M P0696 7FFFh 32767 decimal analog output value 100 96 The showed example was for PO696 but the same scale is also used for the parameters PO697 P0698 P0699 For instance to control the analog output 1 via serial the following programming must be done M Choose a parameter from P0696 to P0699 to be the value used by the analog output 1 For this example we are going to select P0696 M Program the option Content P0696 as the function for the analog output 1 in P0254 M Using the serial interface write in PO696 the desired value for the analog output 1 between O and 100 according to the parameter scale Refer to the CFW 11 manual for knowing the actual output resolution 17 Inverter Programming JL NOTE j m ME If the analog output is programmed for working from 10 V to 10 V negative values must be programmed at the specitic parameter so that 32768 to 32767 represent a variation from 10 V to 10 V at the output 18 TP Protocol 4 TP Protocol The TP Protocol was developed with the purpose of making it possible the communication with the TP line PLC s However due to its flexibility and easiness to use
44. usceptible to interference For that reason the cable used for the communication must be as short as possible always less than 10 meters and must be laid separately from the power input and motor cables Accessory Kits 2 1 5 Cables for the RS232 Connection In case it is wished WEG is able to supply the following cables for the connection in RS232 between the CFW 11 inverter and a network master as a PC for instance Cable WEG Part Number Shielded RS232 cable with a DB9 female connector 10050328 Length 3 meters Shielded RS232 cable with a DB9 female connector Length 10 meters 10191117 Other cables however can be found in the market generally called nu modem or assembled according to what is wished for the installation 2 2 RS485 The CFW 11 presents 2 options for using the RS485 interface as described next 2 2 1 RS485 01 Kit WEG part number 10051957 Composed by the RS485 communication module drawing at the left mounting instructions and fixing screw The interface follows the ElA 485 standard The interface is electrically isolated and with differential signal which grants more robustness against electromagnetic interference It allows the connection of up to 32 devices to the same segment More devices can be connected by using repeaters A maximum bus length of 1000 meters WEG part number 10051960 Composed by the CAN RS485 01 communication module drawing at the
45. well as for response cannot exceed 64 bytes M The transmitted values are always integer regardless of having a representation with decimal point Thus the value 9 5 would be transmitted via serial as being 95 5Fh Refer to the CFW 11 parameter list to obtain the resolution used for each parameter 5 4 1 Function 03 Read Holding Register It reads the content of a group of registers that must be necessarily in a numerical sequence This function has the following structure for the reading and response telegrams the values are always in hexadecimal and each field represents a byte Request Master Response Slave Slave Address Slave Address Function Function Address of the initial register high byte Byte Count field Address of the initial register low byte Datum 1 high Number of registers high byte Datum 1 low Number of registers low byte Datum 2 high CRC Datum 2 low CRC etc CRC CRC Example 1 reading of the motor speed P0002 and the motor current P0003 of the CFW 11 located at the address 1 assuming that P0002 1000 rpm and P0003 3 5 A M Address 1 01h 1 byte M First parameter number 2 0002h 2 bytes M Value of the fist parameter 1000 03E8h 2 bytes 25 Modbus RTU Protocol M Value of the second parameter 35 0023h 2 bytes Request Master Response
46. x6E OxAE OxAA Ox6A Ox6B OxAB 0x69 OxA9 OxA8 0x68 0x78 OxB8 OxB9 0x79 OxBB 0x7B Ox7A OxBA OxBE Ox7E Ox7F OxBF 0x7D OxBD OxBC Ox7C 0xB4 0x74 0x75 OxB5 0x77 OxB7 OxB6 0x76 0x72 OxB2 OxB3 0x73 OxBl 0x71 0x70 OxBO 0x50 0x90 0x91 0x51 0x93 0x53 0x52 0x92 0x96 0x56 0x57 0x97 0x55 0x95 0x94 0x54 0x9C Ox5C 0x5D 0x9D Ox5F Ox9F Ox9E Ox5E Ox5A Ox9A Ox9B 0x5B 0x99 0x59 0x58 0x98 0x88 0x48 0x49 0x89 0x4B 0x8B Ox8A 0x4A 0x4E Ox8E 0x8F 0x4F 0x8D Ox4D 0x4C 0x8C 0x44 0x84 0x85 0x45 0x87 0x47 0x46 0x86 0x82 0x42 0x43 0x83 0x41 0x81 0x80 0x40 The function returns the CRC as a unsigned short type unsigned short CRCl6 puchMsg usDataLen unsigned char puchMsg message to calculate CRC upon unsigned short usDataLen quantity of bytes in message xl unsigned char uchCRCHi OxFF high byte of CRC initialized unsigned char uchCRCLo OxFF low byte of CRC initialized EJ unsigned uIndex will index into CRC lookup table while usDataLen pass through message buffer ulndex uchCRCLo puchMsgg calculate the CRC ud uchCRCLo uchCRCHi auchCRCHi uIndex uchCRCHi auchCRCLo uIndex return uchCRCHi lt lt 8 uchCRCLo 32 Appendices Appendix C CRC Calculation Using Displacement of Registers The a
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