LCT通讯规约(中英文版)

1、LCT 微机励磁控制器LCT Digital Excitation Controller通讯规约Communication ProtocolLCT微机励磁控制器与DCS分散控制系统的通讯协议The protocol of LCT digital excitation controller and DCS separated controlling system一、 通讯标准 Communication standard采用RS-232串口；通讯波特率9600bps；3线通讯方式数据出、数据入、地。Adopt RS-232 serial port;9600bps communicating ba

2、ud rate; three-line communicating mode(data output, data input, earth).二、 通讯协议 Communication protocol采用MODBUS协议，RTU编码方式。Adopt Modbus protocol, RTU coding mode.采用主从式通讯方式，DCS系统为主站，励磁控制器为从站。Adopt master-slaving communication mode, define DCS system as master station， digital excitation controller as sl

3、ave station.三、 通讯数据格式 Communication data mode1位起始位，8位数据位，没有奇偶校验，2位停止位。1 bit as start bit, 8 bit as data bit, non odd and even checking, 2 bit as stop bit.错误检测采用CRC16校验方式，校验多项式为X16+X15+X2+1。Error checking adopts CRC16 test mode, testing multinomial is X16+X15+X2+1.四、 数据包格式 Data package format起始Start目

4、的地址Destination address功能码Function code数据DataCRC校验CRC checking结束EndT1T2T3T41字节1 Byte1字节1 ByteN字节N Byte2字节2 ByteT1T2T3T4T1T2T3T4：时间长度，由应用程序控制，两个数据包之间的最小时间间隔为传送3.5个字符的发送时间约4ms。Time length, controlled by application, the least time distance between two data package is as long as the sending time of 3.5

5、character(about 4ms).目的地址Destination address：DCS主站要访问的从站地址。如果励磁调节器为双通道结构，则占用两个从站地址；假设励磁调节器为单通道结构，则占用一个从站地址。 The slave address which the DCS master station should call on. If excitation regulator is two-channel structure, engross two slave station addresses; If single-channel structure, then use one

6、slave station address.功能码Function code：主站告知从站所要执行的操作代码。 Master station give slave station the operation code it will carry out.数据Data：传送的数据，长度为N字节。Sent data, length is N byte.CRC校验CRC checking：前面所有数据的CRC校验值，长度为2字节。The CRC testing value of above all data, length is 2 bytes.五、 功能码定义 Function code defi

7、nition为保证微机励磁调节装置的可靠运行，调节装置只支持DCS主站的读命令，不允许DCS主站对调节装置进行控制。调节装置所支持的功能码如下：To guarantee excitation regulators reliable running, regulating equipment only support DCS master stations reading commend, controlling regulating equipment by DCS master station is forbidden. The function code supported is foll

8、owing:02：DCS主站读微机励磁调节装置的开关量数据。DCS master station read excitation regulators digital data.03：DCS主站读微机励磁调节装置的模拟量的额定量数据。DCS master station read excitation regulators analog rated data.04：DCS主站读微机励磁调节装置的模拟量数据。DCS master station read excitation regulators analog data.六、 数据传送格式 Data sending format1 读开关量数据

9、 Read digital dataDCS主站发送微机励磁调节装置的数据格式8个字节：The data format which DCS master station to send excitation regulator(8 bytes): 从站地址Slave station address功能码02Function code02首地址HiFirst addressHi首地址LoFirst addressLo点数HiPoint numberHi点数LoPoint numberLoCRC校验LoCRC checkingLoCRC校验HiCRC checkingHi微机励磁调节装置发送DCS主

10、站的数据格式：The data format which excitation regulator use to send DCS master station:从站地址Slave station address功能码02Function code02字节数NByte numberN数据1Data1数据NDataNCRC校验LoCRC checkingLoCRC校验HiCRC checkingHi微机励磁调节装置向DCS主站发送的开关量有8个字节，依次为Kairu1、Kairu2、Kairu3、Facru、Kaicu1、Kaicu2、Kaicu3、Faccu，其中前4个字节为输入开关量，后4个

11、字节为输出开关量，首地址为01H。K系列的开关量为送出装置或由装置外送入的开关量，F系列的开关量只送至控制器面板或只由控制器面板送入的开关量。The digital excitation regulator send to DCS master station has 8 bytes, in turn is Kairu1, Kairu2, Kairu3, Fairu, Kaicu1, Kaicu2, Kaicu3, Faccu. Thereinto the first four bytes are input digital, the other four are output digital

12、, first address is 01H. K series digital are digital to send out of the equipment or send into the equipment from outside, F series digital are digital only sent to controller faceplate or sent by controller faceplate.各个开关量的定义如下：Each digitals definition is following:励磁控制器输入开关量Kairu1定义The definition

13、of Digital excitation controller input digital data Kairu1:Bit7=1：备用DI8 Spare DI8Bit6=1：起励Start excitationBit5=1：出口断路器合闸Oil breaker closeBit4=1：发电机出口保护动作generator protecting operationBit3=1：中控减磁Center room lower excitationBit2=1：中控增磁Center room raise excitationBit1=1：水电模式下为“95转速到” it is “%95 rotor s

14、peed to” under hydroelectric modeBit0=1：中控运行Center room run励磁控制器输入开关量Kairu2定义The definition of Digital excitation controller input digital data Kairu2:Bit7=1：2#功率柜快熔 2# Rectifier fuse bornBit6=1：2#功率柜风机故障 2# Rectifier fan faultBit5=1：1#功率柜快熔1# Rectifier fuse bornBit4=1：1#功率柜风机故障1# Rectifier fan faul

15、tBit3=1：PSS投入PSS puts onBit2=1：发电机灭磁断路器动作Generator field deexcitation operationBit1=1：双通道模式下为“它套从柜运行” It is “the other is slave run” under two-channel modeBit0=1：双通道模式下为“它套正常”It is “the other is OK” under two-channel mode励磁控制器输入开关量Kairu3定义The definition of Digital excitation controller input digital

16、 data Kairu3:Bit7=1：备用DI24Spare DI24Bit6=1：备用DI23 Spare DI23Bit5=1：备用DI22 Spare DI22Bit4=1：投入跟踪系统电压功能Switch to track system voltage functionBit3=1：投入恒COS调节功能Switch to constant COS regulation functionBit2=1：投入恒无功调节功能Switch to constant reactive power regulation functionBit1=1：3#功率柜快熔3# Rectifier fuse

17、bornBit0=1：3#功率柜风机故障3# Rectifier fan fault励磁控制器面板输入开关量Facru定义The definition of Digital excitation controller faceplate input digital data Facru:Bit7=1：信号复归Signal resetBit6=1：就地减Local lower excitationBit5=1：就地增Local raise excitationBit41/0：就地置位投/就地置位退Local quickly set excitation/Local quickly set exc

18、itation offBit31/0：PSS投/PSS退Pss putson/Pss puts offBit21/0：自动运行/手动运行Auto run/Manual runBit11/0：就地运行/就地退出Local run/Local quitBit01/0：中控/就地Center room/local励磁控制器输出开关量Kaicu1定义The definition of Digital excitation controller output digital data Kaicu1:Bit7调节器故障退出Regulator fault quitBit6起励失败Start excitati

19、on failBit5低励限制动作Under excitation limit doneBit4过流限制动作Over excitation limit doneBit3自动运行故障切手动运行动作Auto run fault switch to manual run doneBit2V/F限制动作V/F limit doneBit1脉冲出错Pulse errorBit0PT熔丝熔断PT fuse failure励磁控制器输出开关量Kaicu2定义The definition of Digital excitation controller output digital data Kaicu2:B

20、it7起励控制投起励回路Start excitation switch to start excitation circuitBit6AVR故障跳调节器直流输出开关AVR fault to open regulator DC output breakerBit51#功率柜故障1# Rectifier faultBit42#功率柜故障2# Rectifier faultBit33#功率柜故障3# Rectifier faultBit2DEH信号：过励磁动作DEH signal：over excitation doneBit1DEH信号：最大励磁限制动作；其他为强励动作DEH signal：max

21、 excitation limit done；other is force excitation doneBit0小机无刷励磁方式为：调节器输出电流为0；其它励磁方式为DEH信号：V/F动作The non-brush machine mode：regulator output current is 0；other excitation mode is DEH signal：V/F done励磁控制器输出开关量Kaicu3定义The definition of Digital excitation controller output digital data Kaicu3:Bit7手动运行Man

22、ual runBit6调试状态中频励磁电源使用50Hz同步励磁电源Used on intermediate frequency generator group when test and overhaul without intermediate frequency electrical source, use 50HZ electrical source to replace to connect 50HZ in synchronous circuit.Bit5退出运行Quit runningBit4备用DO21Spare DO21Bit3备用DO20Spare DO20Bit2=1： 双通

23、道模式下本套为“从柜运行” The set is slave under two-channel mode.Bit1本套正常The set is OK.Bit0自动运行Auto run励磁控制器面板输出信号开关量Faccu定义The definition of Digital excitation controller faceplate output digital data Faccu:Bit7装置出错Equipment errorBit6减磁Lower excitationBit5增磁Raise excitationBit4置位投入Quickly setting excitation p

24、uts on.Bit3PSS投入PSS puts on.Bit21/0：自动/手动 Auto/ManualBit11/0： 运行/退出 Run/QuitBit01/0：中控/就地 Center room/local2 读模拟量的额定量数据 Read analogs rating dataDCS主站发送微机励磁调节装置的数据格式8个字节 The data format DCS master station to send excitation regulating equipment(8 bytes):从站地址Slave station address功能码03Function code03首地

25、址HiFirst addressHi首地址LoFirst addressLo点数HiPoint numberHi点数LoPoint numberLoCRC校验LoCRC checkingLoCRC校验HiCRC checkingHi微机励磁调节装置发送DCS主站的数据格式The data format excitation regulator use to send DCS master station:从站地址Slave station address功能码03Function code03字节数2NByte number2N数据1HiData1(Hi)数据1LoData1(Lo)数据NHi

26、Data N(Hi)数据NLoData N(Lo)CRC校验LoCRC checkingLoCRC校验HiCRC checkingHi微机励磁调节装置向DCS主站发送的模拟量的额定值有5个字，10个字节。依次为Vfref、Vfref、Iref、Pref、Qref，首地址为01H，其定义分别为：发电机励磁专用电压互感器之额定发电机电压采样值、发电机仪表用电压互感器之额定发电机电压采样值、发电机电流互感器之额定发电机电流采样值、额定发电机有功功率采样值、额定发电机无功功率采样值。另外发电机直流量如发电机转子电压、电流及调节器输出电流等的额定采样值统一规定为1000H，因此不再向DCS主站发送该量。

27、The analog which excitation regulator send to DCS master station has 5 words, 10 bytes. They are in turn Vfref, Vfref, Iref, Pref, Qref,the first address is 01H,the definitions are: generator excitation specific PTs rating generator voltage sampling value, generator instrument PTs rating generator v

28、oltage sampling value, generator current transformers rating generator current value, rating generator active power sampling value, rating generator reactive power sampling. In addition the rating sampling value of generator DC data (such as generator rotor voltage, current and regulator output curr

29、ent and so on) is define as 1000H, so it wouldnt send the rating data to DCS master station.3 读模拟量数据 Read analog dataDCS主站发送微机励磁调节装置的数据格式8个字节The data format DCS master station to send excitation regulator(8 bytes):从站地址Slave station address功能码04Function code04首地址HiFirst addressHi首地址LoFirst addressLo点

30、数HiPoint numberHi点数LoPoint numberLoCRC校验LoCRC checkingLoCRC校验HiCRC checkingHi微机励磁调节装置发送DCS主站的数据格式The data format excitation regulator use to send DCS master station:从站地址Slave station address功能码04Function code04字节数2NByte number2N数据1HiData1(Hi)数据1LoData1(Lo)数据NHiData N (Hi)数据NLoData N (Lo)CRC校验LoCRC c

31、heckingLoCRC校验HiCRC checkingHi微机励磁调节装置向DCS主站发送的模拟量有11个字，22个字节。依次为Vf、Vf 、If、P、Q、Vfd、Ifd、Iffd、Vref、Href、，首地址为01H，其定义分别为：发电机励磁专用电压互感器之发电机电压、发电机仪表用电压互感器之发电机电压、发电机电流、发电机有功、发电机无功、发电机转子电压、发电机转子电流、调节器输出电流、发电机自动给定、发电机手动给定、可控硅开放角。另外Vref的基准值为Vfref；Href的基准值为1000H，无刷励磁时以调节器输出电流为单位、其它励磁方式以发电机转子电流为单位；的值按4000H对应90&

32、#186;为基准。The analog data excitation regulator send to DCS master station has 11 words, 22 bytes. They are in turn Vf, Vf, If, P, Q, Vfd, Ifd, Iffd, Vref, Href, ,the first address is 01H,the definitions are: generator excitation specific PTs generator voltage sampling value, generator instrument PTs

33、generator voltage sampling value, generator current, generator active power, generator reactive power, generator rotor voltage, generator rotor current, regulator output current, generator auto reference voltage, generator manual reference current, SCR opening angle. In addition Verf reference value

34、 is Vfref; Href reference value is 1000H, when non-brush excitation system use regulator output current, other excitation system use generator rotor current; s value use the reference that 4000h correspond 90º.4 例子 For example模拟量换算例子：以某125MW发电机组为例。Analog data conversion example: set 125MW gener

35、ator group as example.发电机额定有功Generator rating active power： 发电机额定电压Generator rating voltage： 发电机额定励磁电压Generator rating excitation voltage： 发电机额定励磁电流Generator rating excitation current： 调节器额定励磁电流Regulator rating excitation current： 发电机额定功率因数Generator rating power factor： CosN=0.85通过计算 By calculation:

36、发电机额定无功Generator rating reactive power： 发电机额定定子电流Generator rating stator current： 发电机PT变比为Generator PT tramsformation ratio is： 13.8KV/100V发电机CT变比为Generator CT tramsformation ratio is： 8KA/5A额定发电机CT电流为Rating generator CT current is： 3.845A励磁调节器额定交流采样量各值为Excitation regulator rating AC sampling each values are： 测量PT的采样值为Specific PT sampling value is：334DH 仪表PT的采样值为Instrument PT sampling value is：334DH CT的采样值为CT sampling value is：3D4AH 发电机有功的采样值为Generator active p