REMIO Modbus Comms manual issue 2
Contents
1. 2 Bytes 2 Bytes Note e Broadcast not allowed RESPONSE Byte count Bit values n First Byte Last Byte 1 Byte D Bytes Bytes are filled in order from the LSB to the MSB The last byte is filled with zeros if necessary i E Last read bit S Heigth read bit a First read bit X xX x X X x 0 0 X X First Byte Second Byte Last byte Unused Bits of the last byte are r g filled with 0 5 8 2 Example The 6 Ports of the device are as follows REMIN Madhiue Cammininatinane Intarfana Cammininatinne Manual Port gt 0x56 Port3 gt OxB2 Port5 gt 0x45 Port gt OxCF Port4 gt 0x22 Port6 gt 0x55 The address of the device is 50 decimal The Request Frame is 0x32 0x02 0x00 0x05 0x00 0x12 OxED OxC5 Request the 18 decimal bit values from the bit address 5 And the Response Frame is 0x32 0x02 0x03 0x25 0x5B 0x00 0x57 0x76 Another example with a faulty demand bit address not existent Demand 0x32 0x02 0x00 0x23 0x00 0x12 Ox0C Ox0E Response 0x32 0x82 Ox0A 0x30 OxA8 Error Code 10 5 9 Read 1 or several words function 3 function 4 5 9 1 Structure of the frames REQUEST First Word addr Word number MSB LSB MSB LSB CRC 2 Bytes 2 Bytes 2 Bytes Note e Broadcast not allowed e Only a maximum of 8 values is permissible with this function RESPONSE SLAVE Byte count Word values ADDR Sor 4 n F2. Very few profiles defining devices on Modbus networks exist although the CNOMO standard defines the addresses of a few key parameters It is generally unwise to use Modbus addresses that are greater than 99 since many SCADA systems are unable of accessing them 2 8 Configuration method Master typically a PLC SCADA system or panel is hand programmed with parameter addresses then programmed to poll data and write to parameters as required 2 9 Conformance testing No standard testing REMIN Madhiue Cammininatinane Intarfana Cammininatinne Manual 3 GENERAL PRODUCT INFORMATIONS see the User Manual HA175874ENG for complete specification informations 3 1 REMIO MODBUS Interface characteristics The REMIO Interface is a MODBUS Slave Module according to Gould Modicon specification Bus connection using shielded twisted pair RS485 Speed 9 600 or 19 200 baud s selectable by switch Parity 8 bits with no parity 9 bits parity EVEN available on demand Interface status indicated by LEDs See chapter 7 Address set directly by the link from the Master Unit address can be set or changed from the bus without any switch or jumper Exiting the factory the address of the interface is set to 32 decimal A Watchdog Timer monitors the elapsed time between two messages The watchdog is reset with each error free frame received on recognition of the Station Number In case of error all the interface ports are set to l
3. ss cc00 sn ereraa a EE E EEEE 20 5 15 1 Structure of eirames cc eceeeeeeeecececeaeeneeeeeeeeseeeaneaeees Erreur Signet non d fini 5 15 2 EXP ita ii Bois idad Erreur Signet non d fini REMIN Madhiue Cammininatinane Intarfana Cammininatinne Manal 6 PERFORMANCES a eet dee dee eget Erreur Signet non d fini Te TROUBLE SHOOTING srs pi oseere ge EENS ENEE NEEN Erreur Signet non d fini Pollo gt Mod bus status leds iia 22 1 2 Input Output status leds tesis ers rated potser pd E E caceres pista da 23 7 2 1 Digital Input Output modules essi e T EE E E E E aE T eo Sraa 23 7 2 2 Time Proportionning Module REMIN Madhiie Oammiininatinne Intarfana Cammininatinne Manal 1 INTRODUCTION Following documents have been used for these specifications e GOULD MODBUS Protocol Reference Guide PI MBUS 300 Rev B EUROTHERM Group MODBUS Standard Technical Note n 0998 RS485 ElA Standard e Standard CEI 1131 3 programmable controllers programming Languages 2 MODBUS GENERAL CHARACTERISTICS The goal of this paragraph is to remember the basic principle of MODBUS issued from the Gould Modbus specifications and the application to our product It isn t really a Fieldbus MODBUS is not covered by the ISO from the OSI model Targeted at industrial automation use where timing is not critical 2 1 Protocol type Single Master Multiple Slaves type Several function codes see chapter 5 8 a
4. 2Bytes 2Bytes 1 Byte n Bytes 2 Bytes Note e Broadcast allowed at the Device address 00 e Parameter addresses must be consecutive e Only a maximum of 8 values is permissible with this function RESPONSE First Word addr Word number MSB LSB MSB LSB CRC 2 Bytes 2 Bytes 2 Bytes Notes e In case of broadcasting there is no response amp Important Do not include this function in a program loop if the parameters are stored in non volatile memory 5 15 2 Example Request 0x32 0x10 0x00 0x01 0x00 0x06 Ox0C 0x00 OxE5 0x00 0x54 0x00 0x82 0x00 OxA2 0x00 0x85 0x00 0xC2 0x83 0x62 Response 0x32 0x10 0x00 0x01 0x00 0x06 0x14 0x08 6 PERFORMANCES The system reaction time is dependant of the Master device used The maximum speed of the network is conditioned by the rate at which the controller can serve interrupts from the network The maximum baud rate available on the REMIO Interface is 19200 bauds A typical single parameter poll reply message can be completed in around 15 20 ms using Modbus This gives a transfer rate of 10 50 parameters per second REMIN Madhiue Cammininatinane Intarfana Cammininatinne Manual Blocks of data may be transferred in one operation allowing more efficient and coherent data transfer Typically each additional value transmitted takes the transmission time for 10 bits although a little extra message processing latency may be added f
5. 3 Response frame SECHER esis ees EEES ook sa ESEE SEEP SEIE PONERSE EEN EE EENS 9 DA Frame senchrotteatonz sioe erer ENEE das EENET KAES 9 5 5 Error TESpONSE HERE Ree Ee n a Oriana a E a e ree Ney 10 5 6 List of valid parameters addresggeg cece cece cece ence cece cece nooo ne ceneeeeeeeeeeeeeeeeeeeesaecea esau eeaa sean eeu eeas 11 5 7 Lastiot Valid bitedddreS Se Sissi ova aos ds RAI Oo saeco Ee SRE oes EE ENEE EE 12 5 8 Read 1 or several bits function 1 function 72 13 5 8 1 EE CEET THE frAM ESS nt load 14 5 8 2 SE XAIMPIlS s ahs ye ONE Bs gOS Me a e Sa Son RG o SE AS hs 15 5 9 Read 1 or several words function 3 function A 15 O Structure ofthe framesii aene a daba 15 6 92 DEE EE ee EE E E E E E EA 16 5 10 Write bit function SE 16 5 10 1 Struct r ofthe frames EE 16 5 10 2 CEA ER E EA Ee ete S EE Ee EEA 17 5 11 Write word uneegnen dE ee EE ee a een 17 5 11 1 SiruCctUre OF TNE MAME AA AA a 17 5 11 2 EXA Plot io ee ENEE EE Erreur Signet non d fini 5 12 Read exception status FUNCTION Te 18 5 12 1 Str ct re ofthe frames state tada tinta dat ceda aoe 18 5 12 2 A A feud intent a aces i ere Eelere EE 18 5 13 Diagnostic test Toperten Reeg se ysborse gee S EEs aSa Ep EEE PESER couse seras Naci E IEEE 18 5 13 1 Siructur e of the aMSN a Ses 18 5 13 2 FE XAMPIG o a e bebe 19 5 14 Write multiple bits function 8 19 5 14 1 gf Ee 19 5 14 2 E EE A el ee eee eh a 20 5 15 Write multiple words function 162
6. MSB LSB 2 Bytes 2 Bytes Notes e The response is simply the echoed request e In case of broadcasting there is no Response amp Important Do not include this function in a program loop if the parameter is stored in non volatile memory of the unit 5 11 2 Example e first example Force the Port 3 to 01010101 0x55 Request 0x32 0x06 0x00 0x02 0x00 0x55 OxED OxF6 Response 0x32 0x06 0x00 0x02 0x00 0x55 OxED OxF6 e Second example Change the unit address parameter address 100 decimal from 50 decimal to 55 decimal This new address will be stored in the non volatile memory of the unit REMIN Madhiue Cammininatinane Intarfana Cammininatinne Manual Request 0x32 0x06 0x00 0x64 0x00 0x37 0x8C 0x00 Response 0x32 0x06 0x00 0x64 0x00 0x37 0x8C 0x00 5 12 Read Exception Status function 7 5 12 1 Structure of the frames REQUEST CRC 2 Bytes Note e Broadcast not allowed RESPONSE CRC 2 Bytes Note e This function has been added for compatibility purposes but is not used 0x00 is returned 5 12 2 Example Request 0x32 0x07 0x55 0x12 Response 0x32 0x07 0x00 0xD2 Ox3F 5 13 Diagnostic Test function 8 5 13 1 Structure of the frames REQUEST REMIN Madhiue Cammininatinane Intarfana Cammininatinne Manual Sub code 0 Data 2 Bytes 2 Bytes Note e Broadcast not allowed e Only the sub code 00 is accepted e An
7. can not be used without any repeater REMIN Madhie Cammiuininratiane Intarfana Cammininatinne Manual 5 MODBUS USER INFORMATION S 5 1 Principle The protocol used is the MODBUS RTU That is e Coding system 8 bit binary e Number of bits 8 with no parity a 9 bits parity EVEN is available on demana Start bit 1 Stop bit 1 First bit least significant bit Error Checking Cyclic Redundancy Check The protocol controls the query and response cycle which takes place between master and slave devices Each exchange comprises 2 messages excepted in case of broadcasting where there Is no response sent MASTER SLAVE Slave Address Query Slave Address A ees Function Code Function Code Data Response Data Error Check Error Check Only the Master initiates a transaction Slave Address Specifies which Slave is concerned by the Query frame Function code Indicates which operation has to be performed Data s all the parameters required by the function Error Check Cyclic Redundancy Code CRC 5 2 Query frame structure The query frame structure is as follows Slave Function Informations CRC 16 Address Code 1 Byte 1 Byte n Bytes 2 Bytes REMIN Madhiue Cammininatinane Intarfana Cammininatinne Manual Function field Code ooo Function ________ RECH 2 JL Diagnostic Test Write multiple Words These functions will be detailed below The message is accepted by the Slave only if the addr
8. CONTENTS Ek INTRODUCTION a A A iia 3 2 MODBUS GENERAL CHARACTERISTICS coccoccococcnononncncnnconononcnncnnononnnnrncnnrnnrnrnnrnnnrnnrnnrnnncrnaninninanoss 3 A ele Eden geed dE Eege edel edd eg eege ee 3 2 2 A a EE ad Baad od ok aaa Sea eae aed aS ages Cad Nou Sos Mad adel RENE 3 2 33 Maximum device mutter 35 cccacse NA EEN ENEE EEN tes 3 2 4 Eypical baud TAS aset EA DEER Seat dE AER DAN ea ed Cea Ie es es 3 Zn Maximum network lengths 24 en enn n E deed ege ege Ed ae ege d e eege eer 4 2 0 Network performantei opeen a ie 4 DAs Ee 4 2 8 Configuration Met A Ua DEE Sean heey wens a Ee e ANEN EE ENEE 4 29 Conformance tes g t kaso estas eegen delen lin ae RE 4 3 GENERAL PRODUCT INFORMATIONS dcoococococcnccncononcncononcononcoroncononrononcnronrnnonrnroncnnononnoncnrononranennanonss 5 3 1 REMIO MODBUS Interface charactettstcs 5 3 1 1 Time Proportionning Oufput neiaa ai N EEA T a 5 e gt INSTALLATION N T EEEE TE E AE E dt EEA AE ET EE wits is 6 Alo Address EE 6 4 2 Baud rate EE 6 43 Te TEE Erreur Signet non d fini 4 3 1 Connection on the Main board ococcccccccccoocococcccnononnnnnnnncnnnnnnnnnnnnnns Erreur Signet non d fini 4 3 1 1 Modus conpeclor sarraski rera n Ea Erreur Signet non d fini 5 MODBUS USER INFORMATION S ae 8 Dolls A T E EE EE EE ENEE E SE 8 5 2a Query frame structures A A A 8 5
9. ED LED remains ON until a valid frame is addressed to the unit 7 2 Input Output status leds 7 2 1 Digital Input Output modules Each module is equipped with 2 LEDs GREEN ORANGE The GREEN LED indicates that all is in order with the corresponding module power supply and internal connections The ORANGE LED is lit when the bi directional Input Output Port at the bottom of the module is configured as INPUT and is ACTIVE This Input is active when at least one Input contact is open 7 2 2 Time Proportionning Ouput module TPO module The GREEN LED indicates that all is in order with the corresponding module power supply and internal connections HAHAHAHA AA REMIN Madhiue Cammiuininratiane Intarfana Cammininatinne Manual
10. TPO unit but in this case writing to these ports has no physical effect could be used as virtual ports Broadcast permissible on write operation e Ports 2 4 6 are outputs Readable and Writable if SW1 1 1 are inputs only Readable if SW1 1 0 see User Manual HA175874ENG for more details Note gt These ports are also accessible on a TPO unit but in this case writing to these ports has no physical effect could be used as virtual ports gt Broadcast permissible on write operation e Duty cycle outputs TPO are Output only Readable and Writable Note Broadcast allowed on write operation on these outputs e Unit address Readable and Writable At first power on the Unit Address is 32 decimal by factory setting Before any operation on the bus the device must be assigned a single unmatched address between 1 and 247 Note 32 is an authorised address but care must be taken to have only one unit at this address on the bus This parameter is stored in the units non volatile memory Broadcasting this parameter is not allowed REMIN Madhie Cammiuininratiane Intarfana Cammininatinne Manual e Watchdog Time Out Readable and Writable This parameter indicates the elapsed time allowed without any valid frame addressed to this unit After this time all the outputs are reset to 0 and the RED LED is lit waiting the next valid frame Watchdog_Time_Out 0 gt Watchdog not active The allowe
11. by BROADCASTING at the Address 00 4 2 Baud rate selection The Baud rate is selected by the second switch on the top of the unit Also see the User Manual HA175874ENG for more details SW1 2 baud rate selection SW1 3 SW1 4 Bus Terminal SW1 1 port Resistors configuration MA Beso uGn To SW1 2 OFF 9 600 bauds SW1 2 ON 19 200 bauds REMIN Madhiie Oammiininatinne Intarfana Cammininatinne Manal 4 3 Connections 4 3 1 Connection on the main board 4 3 1 1 Modbus connector The 6 pins connector on the bottom of the unit is used to connect the shielded twisted pair of the bus RX TX RX TX PA GO Go OO e 4 61 62 63 64 65 66 The connections number 61 and 65 are internally connected together as well as the connections number 62 and 64 The Communication electronics is insulated from the Control electronics One earth terminal is provided near the communication connector at the bottom of the unit for shielding purposes Wiring and shielding are described in the User Manual HA175874ENG Care must be particularly taken to the line impedance to the impedance adaptation maximal length etc The Bus terminal resistors can be put in or out circuit using the 2 micro switches intended for this purpose on the top of the unit Note that only the last unit on the bus must have the impedance adaptation resistors fit SW1 3 SW1 4 Bus Terminal Resistors selection More than 32 stations
12. d values are 1000 to 65535 time out in ms or 0 deactivated Note gt This parameter is stored in non volatile memory of the unit Broadcast allowed on write operation e Command Word Readable and Writable This parameter is bit decoded CWIbit0 0 gt Digital Input are read in negative logic Open contact gives a 0 logic level a CWIbitO 1 gt Digital Input are read in positive logic Open contact gives a 1 logic level Note gt If the Command Word has to be changed it is recommended to change it before any other operation Warning CWH is reserved for factory setting It is readable but writing it in the normal way has no effect x CWIbit8 1 gt TPO module 1 fit deactive porti and port2 CWIbit9 1 gt TPO module 2 fit deactive port3 and port4 CW bit10 1 gt TPO module 3 fit deactive port5 and port6 CW bit11 shows the value of SW1 1 CWI bit11 0 gt SW1 1 0 ports2 4 6 configured as INPUT CW bit11 1 gt SW1 1 1 ports2 4 6 configured as OUTPUT XX XX This parameter is stored in the non volatile memory of the unit Writing this parameter by word Function 6 or Function 16 is allowed but not recommended It is preferable to change it bit by bit by using function 5 only avoiding unwanted bits modifications Broadcast allowed on write operation e Instrument Identifier only Readable This parameter has no affectation yet but is requi
13. ess matches its own address number and if the CRC word is correct 5 3 Response frame structure Slave Function Informations Address Code 1 Byte 1 Byte n Bytes The structure is the same for the Query and for the Response 5 4 Frame synchronisation The synchronisation is made by the time elapsed between 2 frames Inter frame gap Following rules must be followed e The time between 2 characters inside a frame must not exceed 3 character time First Byte Second Byte a Third Byte H REQUEST E or S RESPONSE Tch ros Tch TRAME ff lt 3 Tch lt 3 Tch Inside the frame e The time between 2 frames must be greater than 3 character time REMIN Madhiue Cammininatinane Intarfana Cammininatinne Manual Request Request Request or or ae or Response Response Response gt 3 Tch gt 3 Tch Between 2 frames Note The first character of the frame is comprised into the Inter frame gap 5 5 Error response messages An error frame message is as follows Slave Function Error Code Address Code 128 1 Byte 1 Byte 1 Byte with following error codes po CODE ERROR 1 Failure in Device ACK Busy REMIN Madhiie Oammiininatinne Intarfana Cammininatinne Manal 5 6 List of valid parameters addresses Address Parameter Fomat EA e Ports 1 3 5 are Output only Readable and Writable Note gt These ports are also accessible on a
14. irst Word Last Word CRC REMIN Madhiue Cammininatinane Intarfana Cammininatinne Manual Notes e Each word take 2 Bytes MSB LSB In consequence the total number of word is n 2 e Only consecutive words can be read in the same sequence 5 9 2 Example With the same Port values of the previous example Request 0x32 0x04 0x00 0x01 0x00 0x03 0xE4 0x08 Reading of the 3 first ports of the device Response 0x32 0x04 0x06 0x00 0x56 0x00 0xB2 0x00 0x45 0x09 OxBA 5 10 Write 1 Bit function 5 5 10 1 Structure of the frames REQUEST Bit addr MSB LSB Bit value CRC 2 Bytes 1 Byte 2 Bytes Note e Broadcast allowed at the Device address 00 e Bit value 255 gt 1L gt 0 gt OL other values are not accepted RESPONSE Bit addr MSB LSB Bit value CRC 2 Bytes 1 Byte 2 Bytes Notes e The response is simply the demand echoed e In case of broadcasting there is no Response REMIN Madhiue Cammininatinane Intarfana Cammininatinne Manual 5 10 2 Example Force the bit number 3 of port 5 Bit 19 to 1L Request 0x32 0x05 0x00 0x13 OxFF 0x00 0x78 0x3C Response 0x32 0x05 0x00 0x13 OxFF 0x00 0x78 0x3C 5 11 Write 1 Word function 6 5 11 1 Structure of the frames REQUEST Word addr Word Value MSB LSB MSB LSB 2 Bytes 2 Bytes Note e Broadcast allowed at the Device address 00 RESPONSE Word addr Word Value MSB LSB
15. nd following are used to provide access to parameter data either in blocks or as single parameters The protocol differentiates between digital and analogue values but in our application they are treated in the same way function 1 2 and 3 4 are exactly the same Each value has its own separate address space Other function codes provide quick status information and loop back diagnostics 125 registers may be transferred in a single block read write 2 2 Medium used RS485 2 3 Maximum device number 32 RS485 without repeaters including master 2 4 Typical baud rates 9 600 19 200 bauds REMIN Madhiue Cammiuininratiane Intarfana Cammininatinne Manual 2 5 Maximum network length 1200 m at 9600 baud s 2 6 Network performance The maximum speed of the network is conditioned by the rate at which the controller can service interrupts from the network The maximum baud rate supported by the TE Series Interface is 19 200 bauds A typical single parameter poll reply message can be completed in around 15 20 ms using Modbus This gives a transfer rate of 10 50 parameters per second Blocks of data may be transferred in one operation allowing more efficient and coherent data transfer Typically each additional value transmitted takes the transmission time for 10 bits although a little extra message processing latency may be added for larger blocks Typical network scan time of the order of 1 second 2 7 Profiles
16. ogical 0 level in order to avoid malfunction The Time Out can be programmed from an appropriate control A value between 1s and 65s can be selected No redundancy available 3 1 1 Time Proportionning Outputs The REMIO Interface can be equipped with up to 2 optional modules carrying each one 16 Time Proportionning Outputs allowing up to 48 Time Proportionning Outputs on one single unit REMIN Madhiue Cammininatinane Intarfana Cammininatinne Manual 4 INSTALLATION 4 1 Address setting The protocol provides for one Master and up to 247 slaves on a common line Before to start a MODBUS system it must be assigned an unmatched address to each station The Slave Address can ONLY BE SET BY THE LINK No jumper is available for this purpose Because certain device restriction limit the address number to 99 decimal the initial address factory setting is fixed at 32 decimal This address is stored in a non volatile memory and e must be changed by the user before connection of the Unit to the link OR e The address setting must be made with only one slave at the address 32 at the time on the link That is the slaves must be added one by one on the link and each time be assigned a single address between 1 and 247 excepted 32 in this second case The Parameter address of the Device Address is 100 decimal See chapter 5 6 for more information In addition MODBUS provide the possibility to WRITE certain parameters
17. or larger blocks Typical network scan time of the order of 1 second Examples 19 200 Bauds e In normal conditions up to 2000 Digital Input or Output can be read or written in 1 second using blocs in function 3 read or 16 write to reach ports 1 to 6 e Using blocs of 8 words mesured time for Duty Cycle ports are as follows Request for writing 8 words function 16 13 ms Response 4 ms Total latency time 10ms Total_27 ms gt about 250 to 300 TPO setpoints per seconde 7 TROUBLE SHOOTING 7 1 Modbus status leds The Interface is equipped with 2 LEDs GREEN RED REMIN Madhiue Cammininatinane Intarfana Cammininatinne Manual e The GREEN LED indicates that the unit is in the Normal Operation State The master exchanges data s with it at a rate not exceeding the Watchdog Time Out e The RED LED indicates that the Interface is not communicating with the master The master has never addressed this device OR a Watchdog Time Out has occurred before any valid communication with the Master In this case following points must be verified gt connections Bus cable Bus length Impedance adaptation Address Verify that any other Slave has not the same address Verify that the watchdog Time Out is not too short according to the master scan rate At power on the LED s blink 3 times with the following sequence Green LED ON Red LED OFF for 500ms Green LED OFF Red LED ON for 500ms Then the R
18. red by the CNOMO 0x0000 is returned Ss Important 1 All writable parameters are broadcastable excepted Unit Address 2 Do not insert write instructions of a non volatile memory stored parameter in a Program loop 5 7 List of valid bit addresses REMIN Madhiue Cammininatinane Intarfana Cammininatinne Manual e Only Port1 2 3 4 5 6 and the Command Word CW can be accessed as bits e Bit addresses are as follows PORTS e Only these bit addresses are valid e Bits 1 to 24 are output only Readable and Writable e Bits 25 to 48 are Output Readable and Writable if SW1 1 1 gt Input only Readable if SW1 1 0 e Bits 101 to 108 CWL are readable and writable preferably with function 5 to avoid false bits modifications Bit 101 1L gt port2 port4 port6 read in positive logic when selected as Input e Bits 109 to 116 CWH are only readable This byte is reserved for factory setting Bit 109 1L gt TPO module 1 fit deactive port and port2 Bit 110 1L gt TPO module 2 fit deactive port and port4 Bit 111 1L gt TPO module 3 fit deactive port5 and port6 Bit 112 0 gt SW1 1 0 ports2 4 6 configured as INPUT 1 gt SW1 1 1 ports2 4 6 configured as OUTPUT 5 8 Read 1 or several bits function 1 function 2 REMIN Madhiue Cammininatinane Intarfana Cammininatinne Manual 5 8 1 Structure of the frames REQUEST First bit addr Bit number MSB LSB MSB LSB
19. y data value is accepted and echoed RESPONSE Sub code 0 Data 2 Bytes 2 Bytes Note e This function has been added for compatibility purposes but is not used e The response is simply the echoed request 5 13 2 Example Request 0x32 0x08 0x00 0x00 0x00 0x00 OxE5 OxC8 Response 0x32 0x08 0x00 0x00 0x00 0x00 OxE5 OxC8 5 14 Write multiple bits function 15 5 14 1 Structure of the frames REQUEST REMIN Madhiue Cammiuininratiane Intarfana Cammininatinne Manual First Bit addr Bit Bit values MSB LSB number MSB LSB number 2 Bytes 2Bytes 1Byte 2 Bytes Last written bit Heigth written bit i gt First written bit x Xx x x z x 0 0x x First Byte Second Byte Last byte Unused Bits of the last byte are S filled with 0 Note e Broadcast allowed at the Device address 00 RESPONSE First Bit addr Bit number MSB LSB MSB LSB CRC 2 Bytes 2 Bytes 2 Bytes Notes e In case of broadcasting there is no response 5 14 2 Example Request 0x32 OxOF 0x00 0x11 0x00 0x08 0x01 0x55 0x81 OxA8 Response 0x32 OxOF 0x00 0x11 0x00 0x08 0x01 OSCH 5 15 Write multiple Words function 16 5 15 1 Structure of the frames REQUEST REMIN Madhiue Cammiuininratiane Intarfana Cammininatinne Manual First Word Word Word values addr number Total Byte First Word MSB LSB MSB LSB number MSB LSB CRC Last Word MSB LSB
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