Tlk 31 контроллер инструкция на русском

1 Tecnologic TLK31/TLK32/TLK33/TLK35 Communication protocolTLK31/ tlk32 / tlk33 / tlk35 Communication protocol user’s guide1/21 Tecnologic TLK31/TLK32/TLK33/TLK35 Communication protocolINDEX1 Preface ..32 Physical connection .. Communication Function 3 — read n Function 6 — one word The exception Cyclic redundancy check (CRC)..94 Data Some Memory Variables Parameters Identification code 5 TLK31/TLK32/TLK33/TLK35 Communication protocol1 Preface This document is intended to describe the TLK series controllers using the MODBUS protocol in their communication capability and is mainly directed to technicians, system integrators and software subject is subdivided in four levels of interest:first level describes the physical connection to the line;second level presents the data link protocol, that is a subset of the MODBUS RTU (JBUS) protocol;third level describes in detail each data that can be exchanged.

2 Fourth level states performance characteristics of the TLK31/TLK32/TLK33/TLK35 Communication protocol2 Physical connection series controllers are provided with a RS485 serial communication interface, insulated so that any problem arising from ground potential is at rest, the instruments are in a receive condition and are revert to transmission after a correct message has been decoded that matches the configured address. instruments are equipped with 2 terminals named A and connection between TLKs has to be carried on in parallel, all A terminals have to be connected between them so as B termination resistor of 120 ohm is required to maintain the quiescent condition on the line;Adopted baud rates range from 1200 to 38400 baud, that is very satisfactory for application performances, yet very slow for RS485 interface. This fact allows the wiring of the line with a medium quality twisted pair cable: total capacity of the line should not exceed 200 nF.

3 The line can be up to 1000 meters in TLK31/TLK32/TLK33/TLK35 Communication protocol3 Communication protocolThe protocol adopted by TLK series is a subset of the widely used MODBUS RTU (JBUS)1 protocol, so that connections are easy for many commercial PLCs and supervisory users needing to develop their own communication software, all information is available as well as implementation hints. The MODBUS RTU (JBUS) communication functions implemented in TLK series are:function 3 — n word read function 6 — one word functions allow the supervisory program to read and modify any data of the controller. The communication is based on messages sent by the master station (host) to the slave stations (TLK) and slave station that recognises the message as sent to it, analyses the content and, if it is formally and semantically correct, generates a reply message directed back to the communication process involves five types of messages: from master to slave from slave to master function 3: n word read requestfunction 3: n word read reply function 6: one word write requestfunction 6: one word write replyexception reply (as reply to both functions in abnormal conditions)Every a message contains four fields:slave address (from 1 to 255): MODBUS RTU (JBUS) reserves address 0 for broadcasting messages, but due to inherent unreliability of its not implemented for TLK series;function code: contains 3 or 6 for specified functions;information field: contains data like word addresses and word values as required by function in use.

4 Control word: a cyclic redundancy check (CRC) performed with particular rules for characteristics of the asyncronous transmission are 8 bits, no parity, one stop AEG Schneider Automation, Inc. registered trade mark5/21 Tecnologic TLK31/TLK32/TLK33/TLK35 Communication 3 — read n wordThe number of words to be read must be less or equal request has the following frame:slave number 3first word address MSB LSBnumber of words MSB LSB CRC LSB MSBbyte 0byte 1byte 2 byte 3byte 4byte 5byte 6byte 7 The normal reply (as opposed to exception reply) has the following frame:slave number 3NB number of read bytes value of first wordMSB LSBfollowing words CRC LSB MSBbyte 0byte 1byte 2 byte 3byte 4byte 5byte NB + 2byteNB + 36/21 Tecnologic TLK31/TLK32/TLK33/TLK35 Communication 6 — one word writeThe request has the following frame.

5 Slave number 6 word address MSB LSBvalue to write MSB LSB CRC LSB MSBbyte 0 byte 1byte 2byte 3byte 4byte 5byte 6byte 7 The normal reply (as opposed to exception reply) is merely an echo of the request message:slave number 6 word address MSB LSBvalue to write MSB LSB CRC LSB MSBbyte 0 byte 1byte 2byte 3byte 4byte 5byte 6byte 77/21 Tecnologic TLK31/TLK32/TLK33/TLK35 Communication exception replayTLK series instruments reply with an exception when the request is formally correct, but cannot be satisfied standing particular situations; the reply contains a code indicating the cause of the missing regular reply, the frame is:slave numberfunction code with most sign. bit set to 1 exception code CRC LSB MSBbyte 0byte 1 byte 2byte 3byte 4 TLK series adopts a subset of MODBUS RTU (JBUS) exception code:unknown function code 1invalid memory address 2invalid data field3controller not ready 68/21 Tecnologic TLK31/TLK32/TLK33/TLK35 Communication redundancy check (CRC)CRC is a check word that premits to verify the integrity of a message, sent or received, has in the two last characters the CRC check receiving a request, the controller checks the validity of the received message comparing the received CRC with the calculated a reply is ready the controller calculates the CRC word and adds two characters to the prepared message.

6 CRC calculation is performed on every character of the message, excluding the last two. Being MODBUS RTU (JBUS) compatible , TLK series controllers adopt an identical algorithm for CRC calculation, scketched in following diagram:The polinomial adopted by MODBUS RTU (JBUS) is 1010 0000 0000 : the first transmitted character of the CRC word is the least significant between calculated = FFFF hexCRC exor charCRC=n=0shift a destra delCRC nel carrycarry = 1 CRC= CRC exor POLYn = n+1 YYYIl CRC contiene il valore calcolatoprendi il prossimocharn < 8 Tecnologic TLK31/TLK32/TLK33/TLK35 Communication protocol4 Data exchangeThis section contains informations about data exchanged with TLK series controllers concerning numerical and not numerical data, with their formats and limits. definitionsAll exchanged data are in the form of 16 bit types of data are distinguished: numerical and symbolic (or not numerical).Numerical data represents the value of a quantity ( the measured variable, the set point).

7 Symbolic data represents a particular value in a set of values ( the thermocouple type in the set of available ones : J,K, ).Both types are coded as integers number : signed numbers for numerical and unsigned numbers for numerical data, coded as an integer, is coupled with appropriate number of decimal digits to represent a quantity with the same engineering units adopted aboard the data are in fixed point representation; however we make a distinction between two kinds of data:the first kind has determined and unmodifiable decimal point position;the second has programmable decimal point position (dP parameter). zonesAll readable and writable data appear to be allocated as 16 bit words in the memory of the memory map has three zones:varaibles,parameters,instrument identification parameters explore the characteristics of each TLK31/TLK32/TLK33/TLK35 Communication zonesIn this zone there is a collection of main TLK controller variables, it is a group of frequently computed or updated data residing in volatile are available (HEX)DescriptionData typerange of values/symbolsDecimal figuresr/wnote10200PV : measured variable (signed integer)NdPr20201n.

8 Of decimals to be associated to PVN0ras DP parameter30202 Power calculated by the regulatorN a power on the heating outputN a power on the cooling output N a 1 statusS0: OFF1: ON0r70206 Alarm 2 status S0: OFF1: ON0r80207 Alarm 3 statusS0: OFF1: ON0r90208 Active Set Point NdPr10020 Aalarm LBA statusS0: OFF1: ON0r11020 Fregulator statusS 0: OFF 1: auto. reg. 2: tuning 3: man. reg. 0r120240 Digital input 1 statusS0: open1: closedr130241 Digital input 2 statusS0: open1: closedrAbnormal conditions of process variable are reported as special word values which are beyond the normal result of a measure:abnormal conditionreturned valuefront panel displayunderrange(measure) -10000uuuuoverrange (measure) 10000oooooverflow (A/D conv.) 10001—-variable not available10003 not available11/21 Tecnologic TLK31/TLK32/TLK33/TLK35 Communication programmingThe operating and configuration parameters can be read and written through serial one tries to read or write a parameter not available for a certain instrument configuration, a message of error is displayed : data not available.

9 (6).After have written into the parameters zone, it s necessary to start the CHECKSUM calculation, writing any value at the address HEX group (parameters relative to the Set Point)ParameterAddress (HEX)DescriptionData typen decimalsPossibile valuesnSP2800 Select the number of the programmable Set the active Set Point SPHLSP22803 Set Point SPHLSP32804 Set Point SPHLSP42805 Set Point SPHLSPLL2806 Set Point Lower limit SPHLSPHL2807 Set Point Higher 999912/21 Tecnologic TLK31/TLK32/TLK33/TLK35 Communication protocolInP group (parameters relative to the measure input)ParameterAddress (HEX)DescriptionData typen decimalsPossibile valuesSEnS2809 Probe typeTC, Pt100 inputTC, PTC, NTC inputI inputV inputS0=J, 1=CrAL, 2=S , 3= ,4= , 5= Pt100, 6= (mV),7= (mV), 8= (mV)0=J, 1=CrAL, 2=S , 3= ,4= , 5= PTC,6= NTC, 7= (mV),8= (mV), 9= (mV)0= (mA),1= (mA)0= (V), 1= (V), 2= (V), 3= (V)4= (V)SSC280 ALow scale limit in case of input with V / I signals scale limit in case of input with V / I signals 280 CNumber of decimal unit of measurementS0=C, 1=FFiL280 EInput digital secOFSt2810 Measuring rot 2811 Rotation of the measuring straight.

10 OPE functioning in case of measuring errorS0=OR, 1=Ur, 2=OUrOPE 2813 Output power in case of measuring TLK31/TLK32/TLK33/TLK35 Communication protocolParameterAddress (HEX)DescriptionData typen decimalsPossibile valuesdIF2814 Digital input functionS00=noF, 1=AaC, 2=Asi,3=Hold, 4=OFF, 5=CHSP, 6= ,7= ,8= group (parameters relative to outputs)ParameterAddress (HEX)DescriptionData typen decimalsPossibile valuesO1F2815 Functioning of output 1 S0=OFF, 1= , 2= , 3=Alno, 4=Alnc5= AlniO2F2816 Functioning of output 2 S0=OFF, 1= , 2= , 3=Alno, 4=Alnc5= AlniO3F2817 Functioning of output 3 S0=OFF, 1= , 2= ,3=Alno, 4=Alnc5= AlniO4F2818 Functioning of output 4 S0=OFF, 1= , 2= ,3=Alno, 4=Alnc5= Alni14/21 Tecnologic TLK31/TLK32/TLK33/TLK35 Communication protocolBlocco Al1 (parametri relativi all allarme 1)ParameterAddress (HEX)DescriptionData typen decimalsPossibile valuesOAL12819 Output where alarm AL1 is addressedS0=OFF, 1=Out1, 2=Out2, 3=Out3, 4=Out4AL1t281 AAlarm AL1 typeS0=LoAb, 1=HiAb, 2=LHAb, 3=LodE, 4=HidE 5=LHdEAb1281 BAlarm AL1 functioningN0+0 = no function+1 = alarm hidden at the start up+2= alarm delaied+4 = alarm stored+8 = alarm aknowledged+16 = relative alarm hidden at the set point changeAL1281 CAlarm AL1 threshold band alarm AL1 or Minimum set alarm AL1 for high or low threshold band alarm AL1 or Maximum set alarm AL1 for high or low AL1 hysteresisNDp0= delay of alarm AL1 NDp0= secAL1i2821 Alarm AL1 activation in case of measuring errorS 0=no, 1=YESAl2 group (parameters relative to alarm 2)ParameterAddress (HEX)DescriptionData typen decimalsPossibile valuesOAL22822 Output where alarm AL2 is addressedS0=OFF, 1=Out1, 2=Out2, 3=Out3, 4=Out415/21 Tecnologic TLK31/TLK32/TLK33/TLK35 Communication protocolParameterAddress (HEX)