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 Digital Excitation Controller 通讯规约 Communication Protocol1LCT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
2、率 9600bps；3 线通讯方式（数据出、数据入、地） 。Adopt RS-232 serial port;9600bps communicating baud 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 communica
3、tion mode, define DCS system as master station， digital excitation controller as slave 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
4、CRC16 test mode, testing multinomial is X16+X15+X2+1.四、 数据包格式 Data package format起始 Start 目的地址Destination address功能码Function code数据 Data CRC 校验CRC checking结束 EndT1T2T3T4 1 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, controlle
5、d by application, the least time distance between two data package is as long as the sending time of 3.5 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；若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
6、 is two-channel structure, engross two slave station addresses; If single-channel structure, then use one 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 chec
7、king：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.LCT 微机励磁控制器 Digital Excitation Controller 通讯规约 Communication Protocol2五、 功能码定义 Function code definition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 rel
8、iable running, regulating equipment only support DCS master stations reading commend, controlling regulating equipment by DCS master station is forbidden. The function code supported is following: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
9、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 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
10、regulator(8 bytes):从站地址Slave station address功能码（02）Function code（02）首地址（Hi）First address（Hi）首地址（Lo）First address（Lo）点数（Hi）Point number（Hi）点数（Lo）Point number（Lo）CRC 校验（Lo）CRC checking（Lo）CRC 校验（Hi）CRC checking（Hi）微机励磁调节装置发送 DCS 主站的数据格式：The data format which excitation regulator use to send DCS master
11、 station:从站地址Slave station address功能码（02）LCT 微机励磁控制器 Digital Excitation Controller 通讯规约 Communication Protocol3Function code（02）字节数（N）Byte number（N）数据 1Data1数据 NDataNCRC 校验（Lo）CRC checking（Lo）CRC 校验（Hi）CRC checking（Hi）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、F
12、accu，其中前 4 个字节为输入开关量，后 4 个字节为输出开关量，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
13、other four are output digital, 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
14、器输入开关量 Kairu1定义 The definition 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 excitationB
15、it1 =1：水电模式下为“95转速到”it is “%95 rotor speed to” under hydroelectric modeBit0 =1：中控运行LCT 微机励磁控制器 Digital Excitation Controller 通讯规约 Communication Protocol4Center 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 born
16、Bit6 =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 faultBit3 =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
17、“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 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 co
18、nstant 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 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 LCT 微机励磁控制器 Digital Excitation Controller 通讯规约 Communication Pro
19、tocol5controller 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 excitationBit4 1/0：就地置位投/就地置位退Local quickly set excitation/Local quickly set excitation offBit3 1/0：PSS 投/PSS 退Pss putson/Pss puts offBit2 1/0：自动运行/手动运行Auto run/Manual
20、runBit1 1/0：就地运行/就地退出Local run/Local quitBit0 1/0：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 excitation failBit5 低励限制动作Under excitation limit doneBit4 过流限制动作Over excitation limit
21、 doneBit3 自动运行故障切手动运行动作Auto run fault switch to manual run doneBit2 V/F 限制动作V/F limit doneBit1 脉冲出错Pulse errorBit0 PT 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:LCT 微机励磁控制器 Digital Excitation Controller 通讯规约 Communication Protoc
22、ol6Bit7 起励控制投起励回路Start excitation switch to start excitation circuitBit6 AVR 故障跳调节器直流输出开关AVR fault to open regulator DC output breakerBit5 1#功率柜故障1# Rectifier faultBit4 2#功率柜故障2# Rectifier faultBit3 3#功率柜故障3# Rectifier faultBit2 DEH 信号：过励磁动作DEH signal：over excitation doneBit1 DEH 信号：最大励磁限制动作；其他为强励动作
23、DEH signal：max 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 dat
24、a Kaicu3:Bit7 手动运行Manual 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 DO21Bit
25、3 备用 DO20Spare DO20Bit2 =1： 双通道模式下本套为“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 runLCT 微机励磁控制器 Digital Excitation Controller 通讯规约 Communication Protocol7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
26、:Bit7 装置出错Equipment errorBit6 减磁Lower excitationBit5 增磁Raise excitationBit4 置位投入Quickly setting excitation puts on.Bit3 PSS 投入PSS puts on.Bit2 1/0：自动/手动Auto/ManualBit1 1/0： 运行/退出Run/QuitBit0 1/0：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 D
27、CS master station to send excitation regulating equipment(8 bytes):从站地址Slave station address功能码（03）Function code（03）首地址（Hi）First address（Hi）首地址（Lo）First address（Lo）点数（Hi）Point number（Hi）点数（Lo）Point number（Lo）CRC 校验（Lo）CRC checking（Lo）CRC 校验（Hi）CRC checking（Hi）微机励磁调节装置发送 DCS 主站的数据格式 The data format e
28、xcitation LCT 微机励磁控制器 Digital Excitation Controller 通讯规约 Communication Protocol8regulator use to send DCS master station:从站地址Slave station address功能码（03）Function code（03）字节数（2N）Byte number（2N）数据 1（Hi）Data1(Hi)数据 1（Lo）Data1(Lo)数据 N（Hi）Data N(Hi)数据 N（Lo）Data N(Lo)CRC 校验（Lo）CRC checking（Lo）CRC 校验（Hi）CR
29、C checking（Hi）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。The analog which excitation regulator sen
30、d 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 voltage sampling value, generator current
31、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 current and so on) is define as 1000H, so it
32、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 LCT 微机励磁控制器 Digital Excitation Controller 通讯规约 Communication Protocol9master station to send excitation regulator(8 bytes):从站地址Slave station address功能码（04）Function code（04）首地址（
33、Hi）First address（Hi）首地址（Lo）First address（Lo）点数（Hi）Point number（Hi）点数（Lo）Point number（Lo）CRC 校验（Lo）CRC checking（Lo）CRC 校验（Hi）CRC checking（Hi）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（04）Function code（04）字节数（2N）Byte number（2
34、N）数据 1（Hi）Data1(Hi)数据 1（Lo）Data1(Lo)数据 N（Hi）Data N (Hi)数据 N（Lo）Data N (Lo)CRC 校验（Lo）CRC checking（Lo）CRC 校验（Hi）CRC checking（Hi）LCT 微机励磁控制器 Digital Excitation Controller 通讯规约 Communication Protocol10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
35、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 为基准。The analog data excitation regulator send to DCS master station has 11 words, 22 bytes. They are in turn Vf, Vf, I
36、f, 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 generator voltage sampling value, generator current, generator active power, generator reactive power, generator rotor volt
37、age, generator rotor current, regulator output current, generator auto reference voltage, generator manual reference current, SCR opening angle. In addition Verf reference value is Vfref; Href reference value is 1000H, when non-brush excitation system use regulator output current, other excitation s
38、ystem use generator rotor current; s value use the reference that 4000h correspond 90.4 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 generator group as example.发电机额定有功 Generator rating active power：MWPN125发电机额定电压 Generator rating voltage： KVVf8.3发电机额定励磁电压 Generator
39、 rating excitation voltage：fdN265发电机额定励磁电流 Generator rating excitation current： AIfdN10调节器额定励磁电流 Regulator rating excitation current： IfdN6发电机额定功率因数 Generator rating power factor： Cos N=0.85通过计算 By calculation:发电机额定无功 Generator rating reactive power： LCT 微机励磁控制器 Digital Excitation Controller 通讯规约 Co
40、mmunication Protocol11MVARQN47.发电机额定定子电流 Generator rating stator current： KIfN152.6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 samp
41、ling 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：334DHCT 的采样值为 CT sampling value is：3D4AH发电机有功的采样值为 Generator active power sampling value is：37ADH发电机无功的采样值为 Generator reactive power sampling value is：2281H通过 03 功能码读模拟量的额定量数据得到 Use 03 fun
42、ction code to read analog rating data and get:DHVfre34rfAIrefDHPrf37Qref281通过 04 功能码读模拟量的数据依次得到 、 、 、 、 、 、fVffIPQfdV、 、 、 、 的采样值，换算成实际值的方法如下：Use 04 fdIfdrefVrefHfunction code to read analog data and get sampling value of , , ,fffI, , , , , , , in turn，the method which PQfdfIfdrefrefconversing pract
43、ical value is as below:LCT 微机励磁控制器 Digital Excitation Controller 通讯规约 Communication Protocol12（1） 、发电机电压 Generator voltage )(348.1*KVDHVffrefNf发电机测量 PT 电压 Generator specific PT voltage)(3410*10*Vffref发电机仪表 PT 电压 Generator instrument PT voltage)(3410*10* VDHfreff（2） 、发电机电流 Generator current )(43152.6
44、*KAIIfreffNf发电机 CT 电流 Generator CT current )(4385.*845.3*AHDIIfreff（3） 、发电机有功 Generator active power )(37125*MWPreffN（4） 、发电机无功 Generator reactive power )(2814.*VARHQreffN（5） 、发电机转子电压 Generator rotor voltage )(1065*10*VfdfdNfd（6） 、发电机转子电流 Generator rotor current )(1065*10H*AHIIIfdfdNfd（7） 、调节器输出电流 R
45、egulator output currentLCT 微机励磁控制器 Digital Excitation Controller 通讯规约 Communication Protocol13)(106*10*AHIHIIfdfdNfd（8） 、 调节器自动给定 Regulator auto reference voltage)(34Vfre VDrefref（9） 、调节器手动给定：分两种情况 Regulator manual reference current: divide two kinds of situation）自并励及三机常规励磁有测发电机转子电流回路的，则以额定转子电流为基准：I
46、f static excitation and three-machine common excitation can measure generator current circuit, set rating rotor current as reference current:手动给定 Manual reference current )(1065*10*AHHIreffdNref ）无刷励磁及三机常规励磁没有测发电机转子电流回路的，则以额定调节器输出电流为基准：If non-brush excitation and three-machine excitation cant measure generator current , set rating regulator output current as reference current:手动给定 Manual reference current )(106*10*AHHIreffdNref （10）可控硅开放角 SCR opening angle=* 409
