BENCHTOP INSTRUMENT. Digital AC/DC Power Meter. Operation Manual V1.0

Transcription

1 BENCHTOP INSTRUMENT Digital AC/DC Power Meter Operation Manual V1.0

2 Default Setup Item Default Remark Version 0 Model No. Address 1 1 ~ 255 decimal Baud Rate 96 3 bps, 6 bps, 12 bps, 24 bps, 48 bps, 96 bps, 192 bps, 384 bps, 576 bps, 1152bps Parity No Parity N(No Parity),O(Odd Parity),E(Even Parity) Stop Bit 2 Stop Bit 1 Stop Bit,2 Stop Bit Back-Light 10 sec Language English Chinese, English V/A/W Unit / /k Giga, Mega, kilo, mili Wiring Connection Lead/Lag PF 1P2W V LEAD A W/VA VAR + Frequency Mode Hz(v) Data type INTEGER INTEGER,FLOAT PT ratio 1 0.1~9999 CT ratio 1 0.1~9999 Voltage reset 0.% Current reset 0.% Power Maximum 3 (Watt Resolution) IP address Subnet Mask Default Gateway

3 Contents 1. INTRODUCTION Safety terms and symbols General introduction Specification Measurement Dimensions and Stand Operation Case Dimensions Stand Operation Rear Panel Wiring Diagrams Input Wiring Output Wiring USING THE POWER METER Setting Up Serial Port Back-light Language Fix V/A/W Unit Data Format PT: PT ratio setting CT: CT ratio setting V Zero %: to zero the V reading A Zero%: to zero the A reading Power Maximum Lead/Lag PF mode VAR mode Frequency Mode IP /SubMask/Gateway Measurement Range Selection Model Switch Display Switch Hold Help Protocol RS CRC Generation TCP/IP RS Table of registers I

4 1. INTRODUCTION 1-1. Safety terms and symbols Please take a moment to review these safety terms and symbols which may appear in this manual or on equipment to prevent damage to the Power Meter. Identifies conditions or practices that could result in injury or WARNING loss of life. CAUTION Identifies conditions or practices that could result in damage to the instrument or to other objects. DANGER High Voltage ATTENTION Refer to the Manual Earth (ground) Terminal Do not dispose electronic equipment as unsorted municipal waste. Please use a separate collection facility or contact the supplier from which this instrument was purchased General introduction This instrument is an AC/DC digital power meter with 16-bit CPU microprocessor, equipped with multifunction of full digitized measurement, calibration and output. The microprocessor has the advantage of high-speed sampling and calculation function to accurately measure the distortion signal of wave form. Except for its essential measurement on AC/DC voltage, AC/DC current, AC/DC watt, power factor, frequency and Crest Factor, the instrument also provides additional features of PT/CT ratio setting, display value holding, range selecting, auto-ranging, etc. In order for an even more efficient and convenient communication, the instrument is available with the standard RS-232 and RS-485 interfaces. The instrument is a low-cost, easy-to-use power measuring instrument

5 1-3. Specification Warm up time: >30 minutes Minimum input: 2 % of Range Response time: 3 cycles / sec Overload indicating: PEAK Working temperature: 0 ~ 50,RH<80 % Temperature coefficient: ± 0.% FS/ Power supply: AC90 ~ 260V, 50/60Hz BootLoader on RS-232/RS-485 port [Voltage] Range: Measurement Type: Input Impedance: Maximum Input Voltage: PT Ratio Setting: 0.1 to Vpp, 50.Vpp, 1.Vpp, 2.Vpp, 5.0Vpp, 10.0Vpp 6 ranges (Auto range or Manual) True rms 1MΩ 10V Peak Accuracy ( at 23 ± 5 ): DC: ± 0.1% of reading ± 0.1% of range Sinewave: ± 0.1% of reading ± 0.1% of range (45~65Hz) ± 0.2% of reading ± 0.2% of range ± 0.1% of range (10~45Hz, 65~10kHz) [Current] Range: Measurement Type: 1.App, 2.App, 5.0App, 10.0App, 20.0App 6 ranges [Auto range or Manual] True rms Input Impedance: 0.Ω Maximum Input Current: 50A Peak (20A rms) CT ratio setting: 0.1 to 9999 Accuracy (at 23 ± 5 ): DC: ± 0.1% of reading ± 0.1% of range Sinewave: ± 0.1% of reading ± 0.1% of range (45~65Hz) ± 0.2% of reading ± 0.2% of range ± 0.1% of range (10~45Hz, 65~10kHz) [Watt] V W A 1.App 2.App 5.0App 10.0App 20.0App 50.App 20.0Vpp 20.0W 40.W 1.W 2.W 4.0W 10.0W 50.Vpp 50.W 1.W 250.W 5.0W 1.KW 2.50KW 1.Vpp 1.W 2.W 5.0W 1.KW 2.KW 5.0KW 2.Vpp 2.W 4.0W 1.KW 2.KW 4.0KW 10.0KW 5.0Vpp 5.0W 1.KW 2.50KW 5.0KW 10.0KW 25.0KW 10.0Vpp 1.KW 2.KW 5.0KW 10.0KW 20.0KW 50.KW Measurement Type: Accuracy (at 23 ± 5 ): True rms - 2 -

6 DC: Sinewave: ± 0.2% of reading ± 0.2% of range ± 0.2% of reading ± 0.2% of range (45~65Hz) ± 0.4% of reading ± 0.24% of range ± 0.2% of range (10~45Hz, 65~10kHz) [Power Factor] Range: 0.1 to 1.0 Computation: Watt/ (Voltage x Current )=Power Factor(PF) Accuracy (at 23 ± 5 ): W/VA=PF [Frequency] Range: 0.0 Hz to Hz 6 Hz to 5999 Hz 6. khz to 10. khz Accuracy (at 23 ± 5 ): ± 0.2% of reading ±1C [Communication] Baud rate: 3 bps,6 bps, 12 bps, 24 bps, 48 bps, 96 bps, 192 bps, 384 bps, 576 bps, 1152bps Parity: none/even/odd Data bits: 8 Stop bit: 1/2 RS-485 Modbus RTU RS-232 ASCII Ethernet 10M/1M MODBUS MESSAGING ON TCP/IP [Display] LCD 240x128 V/A/W/VA/VAR/PF/Hz/CF 1-4. Measurement Generator Power -Watt VAR = capacitive θ=120, PF = Used Power +Watt VAR = capacitive θ=60, PF= Capacitive (-): current leads voltage V -Watt VAR = inductive θ=-120, PF = Watt VAR = inductive θ=-60, PF= Inductive (+): current lags voltage - 3 -

7 1-5. Dimensions and Stand Operation Case Dimensions Stand Operation There are 3 positions for the instrument stand. Figures 1, 2, and 3 illustrate the instrument with the stand fully retracted horizontally, as a stand, and as a handle. Figure 4 illustrates the method of changing the position of the stand. Pull the stand with both hands from the left and right sides; turn it to the desired position, then release. 圖一 圖二 Figure 1. Stand Retracted Figure 2. Standing Position Pull to left Pull to right Figure 3. Stand as a Handle Figure 4.Changing Positions - 4 -

8 Rear Panel 1) Power Switch 2) Ethernet Connector (Option) 3) RS-232 Connector 4) RS-485 Connector 5) Power-Line Cord Connector, AC 90~260V, 50/60Hz 6) Breaker 7) SOURCE Terminal 8) LOAD Terminal 9) Ground Terminal! Replacement fuse must be the same size as the original Wiring Diagrams Input Wiring Without PT or CT Front Panel Rear Panel - 5 -

9 With CT With Junction Box Source Load N- L+ L+ N- S+: connect to Source L+ L+: connect to Load L+ L-: connect to Load N- S-: connect to Source N

10 Output Wiring Ethernet Connector Pin-out *Ethernet Port This port provides connectivity via a 10/1BaseT RJ45 connection. Modbus TCP protocol is supported RS-232 Connector Pin-out RS-485 Connector Pin-out - 7 -

11 2. USING THE POWER METER 2-1. Setting Up Press F1 Set key to enter setting mode Serial Port 1. Press F2 or F3 key to highlight Serial Port and press F4 key to enter into the Serial Port. 2. : select setting item; : change setting values: : save setting values EXIT: exit the Serial Port setting without saving Back-light 1. Press F2 or F3 key to highlight Back-light and press F4 key to enter into the Back-light. 2. Use direction keys to select values, press F4 key to enter the value, and go to = on the calculator and press F4 key to save the value. F1( ): direction key, go down; F2( ): direction key, go left; F3( ): direction key, go right; F4( ): enter the value; F5(Exit): exit the Back-light setting without saving Language Press F2 or F3 key to highlight Language and press F1 key to set up language: Chinese, English

12 Fix V/A/W Unit 1. Press F2 or F3 key to highlight Fix V/A/W Unit and press F4 key to enter the Fix V/A/W Unit. 2. Press F1 key to select setting item (V, A, W/VA/VAR), and use F2 or F3 key to change display unit, and press up F4 key to save values (W/VA/VAR) setting item and press to enter the Fix V/A/W Unit setting screen. F5(Exit): exit the Back-light setting without saving Data Format Press F2 or F3 key to highlight Data Format and press F1 key to set up Data Format: Integer, Float PT: PT ratio setting 1. Press F2 or F3 key to highlight PT and press F4 key to enter into the PT. 2. Use F1~F3 arrow keys to select values, press F4 key to enter the value, and go to = on the calculator and press F4 key to save the value. F5(Exit): exit the PT setting without saving CT: CT ratio setting 1. Press F2 or F3 key to highlight CT and press F4 key to enter into the CT. 2. Use F1~F3 arrow keys to select values, press F4 key to enter the value, and go to = on the calculator and press F4 key to save the value. F5(Exit): exit the CT setting without saving

13 V Zero %: to zero the V reading 1. Press F2 or F3 key to highlight V Zero% and press F4 key to enter into the V Zero%. 2. Use F1~F3 arrow keys to select values, press F4 key to enter the value, and go to = on the calculator and press F4 key to save the value. F5(Exit): exit the V Zero% setting without saving A Zero%: to zero the A reading 1. Press F2 or F3 key to highlight A Zero% and press F4 key to enter into the A Zero%. 2. Use F1~F3 arrow keys to select values, press F4 key to enter the value, and go to = on the calculator and press F4 key to save the value. F5(Exit): exit the A Zero% setting without saving Power Maximum 1. Press F2 or F3 key to highlight Power Maximum and press F4 key to enter into the Power Maximum. 2. Use F1~F3 arrow keys to select values, press F4 key to enter the value, and go to = on the calculator and press F4 key to save the value. F5(Exit): exit the Power Maximum setting without saving Lead/Lag Press F2 or F3 key to highlight Lead/Lag and press F1 key to set up Lead/Lag: V LEAD A, A LEAD

14 PF mode Press F2 or F3 key to highlight PF mode and press F1 key to set up PF mode: W/VA, LEAD/LAG VAR mode Press F2 or F3 key to highlight VAR mode and press F1 key to set up VAR mode:+, +/ Frequency Mode Press F2 or F3 key to highlight Frequency Mode and press F1 key to set up Frequency Mode: +, +/ IP /Sub Mask/Gateway Press F2 or F3 key to highlight IP /Sub Mask/Gateway and press F4 key to enter into the IP /Sub Mask/Gateway. Press F1 key to highlight setting item and press F2 +10 or F3 +1 key to key in the value, and press F4 key to save the value Measurement Range Selection To select the measurement range automatically or manually. 1. Press F2 key to enter into the measurement menu. 2. Press F1 key to enter into the range selection

15 3. Press F2 key to select V or A range and press F5 key to select auto or manual range for V or A range. With : auto range Without : manual range Model Switch To select four or six displays. Press F2 Mode key to select four or six displays Display Switch To set the measurement order. Press F2 or F3 key to select which display to set up, and press F1 key to set the measurement order, and press F4 key to save Hold To freeze the current reading on the LCD. Hold Press F4 Hold key to freeze the current reading on the LCD. Press F1 TRIG key to trigger a data reading on the LCD Help To set the measurement order. Press F5 Help key

16 3. Protocol 3-1. RS-232 Example: The following string configures the meter and reading a volts/current/power/apparent power/reactive power/power factor data. VOLTage:Range:6;CURRent:Range:6 Current Range select 50A Voltage Range select 10V V?;A?;WATT? ;VA? ;VAR? ;PF? Return PF data Return VAR data Return VA data Return watt data Return A data Return V data Respond: 220.0E+0, 11.2E+0, 2.420E+3, 2.420E+3, 0.0E+3, 1.0!= NO Data, SET COMMAND SUCCESSFUL!? ILLEGAL FUNCTION!> ILLEGAL DATA VALUE!^ SLAVE DEVICE FAILURE COMMAND DESCRIPTION RANGE IDN? Return Manufactory and Type CHITAI,CTEC2422 LOCAL Control By Local COMMAND DESCRIPTION RANGE HOLD:ON Data hold enable HOLD:OFF Data hold disable HOLD:TRIGger Data Trigger COMMAND DESCRIPTION RANGE VOLTage:Range:6 V Range = 10.0V VOLTage:Range:5 V Range = 5.0V VOLTage:Range:4 V Range = 2.V VOLTage:Range:3 V Range = 1.V VOLTage:Range:2 V Range = 50.V VOLTage:Range:1 V Range = 20.0V VOLTage:Range:AUTO V Range = AUTO VOLTage:Range:CLEar V Range = AUTO Clear VOLTage:Range:AUTO? AUTO=1, MANUAL=0 0 ~ 1 VOLTage:Range? Read Voltage Range n n=1~6-13 -

17 COMMAND DESCRIPTION RANGE CURRent:Range:6 A Range =50.A CURRent:Range:5 A Range = 20.0A CURRent:Range:4 A Range = 10.0A CURRent:Range:3 A Range = 5.0A CURRent:Range:2 A Range = 2.A CURRent:Range:1 A Range = 1.A CURRent:Range:AUTO A Range = AUTO CURRent:Range:CLEar A Range = AUTO Clear CURRent:Range:AUTO? AUTO=1, MANUAL=0 CURRent:Range? Read Current Range n n=1~6 COMMAND DESCRIPTION RANGE VOLTage:PT:n Set Voltage Ratio ( PT ) n=0.1~9999 VOLTage:PT? Read Voltage Ratio ( PT ) n=0.1~9999 CURRent:CT:n Set Current Ratio ( CT ) n=0.1~9999 CURRent:CT? Read Current Ratio ( CT ) n=0.1~9999 COMMAND DESCRIPTION RANGE SET:L:n Set Language 0/1 SET:L? Read Language SET:POWer:CLEar Clear Power On Status SET:PF:0 Set PF lead/lag SET:PF:1 Set PF W/VA SET:VAR:0 Set PF L/C SET:VAR:1 Set PF always + SET:LEAD:0 Set Lead V (+) SET:LEAD:1 Set Lead A (+) SET:HZ:0 Set Frequency Source V SET:HZ:1 Set Frequency Source A COMMAND DESCRIPTION RANGE SET:VOLTage:ZERO:n Set V to zero 0. ~ 50. (%) SET:VOLTage:ZERO? return 0. ~ 50. SET:CURRent:ZERO:n Set A to zero 0. ~ 50. (%) SET:CURRent:ZERO? return 0. ~ 50. SET:VOLTage:DOWN:n Set V range down 0.1 ~ 50.0 (%) SET:VOLTage:DOWN? return 0.1 ~ 50.0 SET:CURRent:DOWN:n Set A range down 0.1 ~ 50.0 (%) SET:CURRent:DOWN? return 0.1 ~

18 COMMAND DESCRIPTION Data Format V? Read Voltage 1.15E+2 A? Read Current 1.E+0 WATT? Read Watt 2.3E+1 VA? Read VA 2.3E+1 VAR? Read VAR 0.0E+0 PF? Read PF 1.0 HZ? Read Hz 6.E+1 VCF? Read Voltage Crest Factor 1.41 ACF? Read Current Crest Factor 1.42 DATA? All data plus Unit (V/A/W/VA/VAR/PF/Hz/VCF/ACF) 1.15E+2 V, 1.E+0 A, 2.3E+1 W, 2.3E+1 VA, 0.0E+0 VAR, 1.0 PF, 6.E+1 Hz, 1.41 Vcf, 1.42 Acf

19 3-2. CRC Generation CRC value is calculated by the transmitting device, which appends the CRC to the message. The receiving device recalculates a CRC during receipt of the message, and compares the calculated value to the actual value it received in the CRC field. If the two values are not equal, an error results. The Cyclical Redundancy Check (CRC) field is two bytes, containing a 16-bit binary value. The The CRC is started by first preloading a 16-bit register to all 1 s. Then a process begins of applying successive 8-bit bytes of the message to the current contents of the register. Only the eight bits of data in each character are used for generating the CRC. Start and stop bits, and the parity bit if one is used, do not apply to the CRC. During generating of the CRC, each 8-bit character is exclusive ORed with the register contents. Then the result is shifted in the direction of the least significant bit (LSB), with a zero filled into the most significant bit (MSB) position. The LSB is extracted and examined. If the LSB was a 1, the register is then exclusive ORed with a preset, fixed value. If the LSB was a 0, no exclusive OR takes place. This process is repeated until eight shifts have been performed. After the last (eight) shift, the next 8-bit character is exclusive ORed with the register s current value, and the process repeats for eight more shifts as described above. The final contents of the register, after all the characters of the message have been applied, are the CRC value. PROCEDURE FOR GENERATING A CRC 1) Load a 16-bit register with FFFF hex ( all 1 s ). Call this the CRC register. 2) Exclusive OR the first 8-bit byte of the message with the low-order byte of the 16-bit CRC register, putting the result in the CRC register. 3) Shift the CRC register one bit to the right (toward the LSB), zero-filling the MSB. Extract and Examine the LSB. 4) If the LSB was 0 : Repeat Step 3 ( another shift ). If the LSB was 1 : Exclusive or the CRC register with the polynomial value A1hex (10 ). 5) Repeat Steps 3 and 4 until 8 shifts have been performed. When this is done, a complete 8-bit byte will have been processed. 6) Repeat Steps 2 through 5 for the next 8-bit byte of the message. Continue doing this until all byte have been processed. 7) The final contents of the CRC register is the CRC value. Address Function Data Count Data Data Data Data CRC Lo CRC Hi

20 CRC GENERATION FUNCTION ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// /* The function returns the CRC as a type unsigned short. */ /*CRC Generation Function */ ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// /*High Order Byte Table*/ /* Table of CRC values for high-order byte */ static unsigned char auchcrchi[ ] = { 0x, 0xC1, 0x81, 0x40, 0x, 0xC0, 0x80, 0x41, 0x0l, 0xC0, 0x80, 0x41, 0x, 0xC1, 0x81, 0x40, 0x, 0xC0, 0x80, 0x41, 0x, 0xC1, 0x81, 0x40, 0x, 0xC1, 0x81, 0x40, 0x, 0xC0, 0x80, 0x41, 0x, 0xC0, 0x80, 0x41, 0x, 0xC1, 0x81, 0x40, 0x, 0xC1, 0x81, 0x40, 0x, 0xC0, 0x80, 0x41, 0x, 0xC1, 0x81, 0x40, 0x, 0xC0, 0x80, 0x41, 0x, 0xC0, 0x80, 0x41, 0x, 0xC1, 0x81, 0x40, 0x, 0xC0, 0x80, 0x41, 0x, 0xC1, 0x81, 0x40, 0x, 0xC1, 0x81, 0x40, 0x0l, 0xC0, 0x80, 0x41, 0x, 0xC1, 0x81, 0x40, 0x, 0xC0, 0x80, 0x41, 0x, 0xC0, 0x80, 0x41, 0x, 0xC1, 0x81, 0x40, 0x, 0xC1, 0x81, 0x40, 0x, 0xC0, 0x80, 0x41, 0x, 0xC0, 0x80, 0x41, 0x, 0xC1, 0x81, 0x40, 0x, 0xC0, 0x80, 0x41, 0x, 0xC1, 0x81, 0x40, 0x, 0xC1, 0x81, 0x40, 0x, 0xC0, 0x80, 0x41, 0x, 0xC0, 0x80, 0x41, 0x, 0xC1, 0x81, 0x40, 0x, 0xC1, 0x81, 0x40, 0x, 0xC0, 0x80, 0x41, 0x, 0xC1, 0x81, 0x40, 0x0l, 0xC0, 0x80, 0x41, 0x, 0xC0, 0x80, 0x41, 0x, 0xC1, 0x81, 0x40, 0x, 0xC1, 0x81, 0x40, 0x, 0xC0, 0x80, 0x41, 0x, 0xC0, 0x80, 0x41, 0x, 0xC1, 0x8l, 0x40, 0x, 0xC0, 0x80, 0x41, 0x, 0xC1, 0x81, 0x40, 0x, 0xC1, 0x81, 0x40, 0x, 0xC0, 0x80, 0x41, 0x, 0xC1, 0x81, 0x40, 0x, 0xC0, 0x80, 0x41, 0x, 0xC0, 0x80, 0x41, 0x, 0xC1, 0x81, 0x40, 0x, 0xC0, 0x80, 0x41, 0x, 0xC1, 0x81, 0x40, 0x, 0xC1, 0x81, 0x40, 0x, 0xC0, 0x80, 0x41, 0x, 0xC0, 0x80, 0x41, 0x, 0xC1, 0x81, 0x40, 0x, 0xC1, 0x81, 0x40, 0x, 0xC0, 0x80, 0x41, 0x, 0xC1, 0x81, 0x40, 0x, 0xC0, 0x80, 0x41, 0x, 0xC0, 0x80, 0x41, 0x, 0xC1, 0x81, 0x40};

21 /*Low Order Byte Table*/ /* Table of CRC values for low-order byte */ static char auchcrclo[ ] = { 0x, 0xC0, 0xC1, 0x, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06, 0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD, 0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09, 0x08, 0xC5, 0xD5, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A, 0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC, 0x14, 0xD4, 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3, 0xll, 0xD1, 0xDO, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 0xF2, 0x32, 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4, 0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A, 0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29, 0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED, 0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26, 0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60, 0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67, 0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F, 0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68, 0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA, 0xBE, 0x7E, 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5, 0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 0x70, 0xB0, 0x50, 0x90, 0x9l, 0x51, 0x93, 0x53, 0x52, 0x92, 0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C, 0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B, 0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B, 0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C, 0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42, 0x43, 0x83, 0x41, 0x81, 0x80, 0x40}; ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// unsigned char* puchmsg; /* message to calculate CRC upon */ unsigned short usdatalen; /* quantity of bytes in message */ unsigned short CRC16 (puchmsg,usdatalen) { unsigned char uchcrchi = 0xFF; /* high CRC byte initialized */ unsigned char uchcrclo = 0xFF; /* Low CRC byte initialized */ unsigned char uindex; /* will index into CRC lookup */ while(usdatalen--) { uindex= uchcrchi ^ * puchmsg++; /* calculate the CRC */ uchcrchi = uchcrclo ^ auchcrchi[uindex]; uchcrclo = auchcrclo[uindex]; } return(uchcrchi<<8 uchcrclo); } Address Function Data Count Data Data Data Data CRC Hi CRC Lo

22 3-3. TCP/IP TCP/IP Modbus TCP/IP MBAP Header + Function +Data Query: Response: Transaction Identifier Protocol Identifier Length 02 Unit Identifier ModBus Function Code 03/04/06/10/14/15 Data -- Transaction Identifier Protocol Identifier Length 02 Unit Identifier ModBus Function Code 03/04/06/10/14/15 Data -- Transaction Identifier: Identifier of A Modbus Request/Respond Transaction (2 Byte) Protocol Identifier: Length: Unit Identifier: Function: 0 Modbus Protocol (2 Byte) Number Of Following Bytes Address 03H/04H/06H/10H/14H/15H (1 Byte) Data: 03H Read Holding Registers 04H Read Input Registers 06H Preset Single Register 14H Read File Record 10H Preset Multiply Register 15H Write File Record

23 Preset Single Register (06H) : Query: Response: Slave Address Function 06 Register Address Hi Register Address Lo Preset Data Hi Preset Data Lo Slave Address Function 06 Register Address Hi Register Address Lo Preset Data Hi Preset Data Lo Slave Address: (1 Byte) Function: 06H (1 Byte) Register Address: Start address is 1 (2 Byte) Preset Data: (2 Byte) Preset Multiply Register (10H): Query: Slave Address Function 10 Register Address Hi Register Address Lo Number of Point Hi Number of Point Lo Number of Byte 02 Data High Byte Data Low Byte Response: Slave Address Function 10 Register Address Hi Register Address Lo Number of Point Hi Number of Point Lo Slave Address: (1 Byte) Function: 10H (1 Byte) Register Address: Start address is 1 (2 Byte) Number of Point: (2 Byte) Number of Byte: Byte Length ( 1 Byte) Data: n Byte

24 Read Holding Registers (03H) : Query: Slave Address Function 03 Register Address Hi Register Address Lo Number of Point Hi Number of Point Lo 02 Slave Address: (1 Byte) Function: 03H (1 Byte) Register Address: Start address is H Number of Point: 2 (4 Byte) Response: Slave Address Function 03 Byte Count 04 Data Hi (Address 256) Data Lo (Address 256) Data Hi (Address 257) Data Lo (Address 257) Slave Address: (1 Byte) Function: 03H (1 Byte) Byte Count: 4 Data: 4 Byte Read Input Registers (04H): Query: Slave Address Function 04 Register Address Hi Register Address Lo Number of Point Hi Number of Point Lo 02 Slave Address: (1 Byte) Function: 04H (1 Byte) Register Address: Start address is H Number of Point: 2 (4 Byte) Response: Slave Address Function 04 Byte Count 04 Data Hi (Address 256) Data Lo (Address 256) Data Hi (Address 257) Data Lo (Address 257) Slave Address: (1 Byte) Function: 04H (1 Byte) Byte Count: 4 Data: 4 Byte

25 Read File Record (14H) : Query: Slave Address Function 14 Byte Count 07 Sub-Req, x Referencr Type 06 Sub-Req, x File Number Hi Sub-Req, x File Number Lo Sub-Req, x Record Number Hi Sub-Req, x Record Number Lo Sub-Req, x Record Length Hi Sub-Req, x Record Length Lo 02 Slave Address: (1 Byte) Function: 14H (1 Byte) Byte Count: 0x07 ~ 0xF5 Sub-Req, x Referencr Type: 0x06 Sub-Req, x File Number: 1 ~ 0xFFFF Sub-Req, x Record Number: 0 ~ 9999 Sub-Req, x Record Length: Response: 1 ~ N Slave Address Function 14 Resp Data Length 06 Sub-Req, x File Resp. Length 05 Sub-Req, x Referencr Type 06 Sub-Req, x Record Data Hi (1) Sub-Req, x Record Data Lo Sub-Req, x Record Data Hi (2) Sub-Req, x Record Data Lo Slave Address: (1 Byte) Function: 14H (1 Byte) Resp Data Length: (Sub-Req, x) Data + 1 Sub-Req, x File Resp. Length: N * Sub-Req, x Referencr Type: 0x06 Sub-Req, x Record Data: N * 2 Byte Write File Record (15H): Query: Slave Address Function 15 Request Data Length 09 Sub-Req, x Referencr Type 06 Sub-Req, x File Number Hi Sub-Req, x File Number Lo Sub-Req, x Record Number Hi Sub-Req, x Record Number Lo Sub-Req, x Record Length Hi Sub-Req, x Record Length Lo Sub-Req, x Record Data Hi (1) Sub-Req, x Record Data Lo Slave Address: (1 Byte) Function: 15H (1 Byte) Request Data Length: 0x09 ~ 0xFB Sub-Req, x Referencr Type: 0x06 Sub-Req, x File Number: 1 ~ 0xFFFF Sub-Req, x Record Number: 0 ~ 9999 Sub-Req, x Record Length: 1 ~ N Sub-Req, x Record Data: N*2 Byte

26 Response: Slave Address Function 15 Request Data Length 09 Sub-Req, x Referencr Type 06 Sub-Req, x File Number Hi Sub-Req, x File Number Lo Sub-Req, x Record Number Hi Sub-Req, x Record Number Lo Sub-Req, x Record Length Hi Sub-Req, x Record Length Lo Sub-Req, x Record Data Hi (1) Sub-Req, x Record Data Lo Slave Address: (1 Byte) Function: 15H (1 Byte) Request Data Length: 0x09 ~ 0xFB Sub-Req, x Referencr Type: 0x06 Sub-Req, x File Number: 1 ~ 0xFFFF Sub-Req, x Record Number: 0 ~ 9999 Sub-Req, x Record Length: 1 ~ N Sub-Req, x Record Data: N*2 Byte Error Message: Response: Slave Address Error Function + 80 Error Status Slave Address: (1 Byte) Function: Send Function Plus 80H (1 Byte) Error Status: (1 Byte) H illegal function 02H illegal data address 03H illegal data value

27 3-4. RS-485 START ADDRESS FUNCTION DATA CRC CHECK END T1-T2-T3-T4 8 BITS 8 BITS N 8BITS 16 BITS T1-T2-T3-T4 RTU Message Frame Preset Single Register (06H): Query: Response: Slave Address Function 06 Register Address Hi Register Address Lo Preset Data Hi Preset Data Lo Error Check (CRC) -- Slave Address Function 06 Register Address Hi Register Address Lo Preset Data Hi Preset Data Lo Error Check(CRC) -- Slave Address: (1 Byte) Function: 06H (1 Byte) Register Address: Start address is 1 (2 Byte) Preset Data: (2 Byte) Error Check: CRC (2 Byte) Preset Multiply Register (10H): Query: Slave Address Function 10 Register Address Hi Register Address Lo Number of Point Hi Number of Point Lo Number of Byte 02 Data High Byte Data Low Byte Error Check (CRC) -- Response: Slave Address Function 10 Register Address Hi Register Address Lo Number of Point Hi Number of Point Lo Error Check(CRC)

28 Slave Address: (1 Byte) Function: 10H (1 Byte) Register Address: Start address is 1 (2 Byte) Number of Point: (2 Byte) Number of Byte: Byte Length ( 1 Byte) Data: n Byte Error Check: CRC (2 Byte) Read Holding Registers (03H): Query: Slave Address Function 03 Register Address Hi Register Address Lo Number of Point Hi Number of Point Lo 02 Error Check (CRC) -- Slave Address: (1 Byte) Function: 03H (1 Byte) Register Address: Start address is H Number of Point: (4 Byte) Error Check: CRC (2 Byte) Response: Slave Address Function 03 Byte Count 04 Data Hi (Address 256) Data Lo (Address 256) Data Hi (Address 257) Data Lo (Address 257) Error Check(CRC) -- Slave Address: (1 Byte) Function: 03H (1 Byte) Byte Count: 4 Data: 4 Byte Error Check: CRC (2 Byte) Read Discrete Input (02H): Query: Slave Address Function 02 Start Address Hi Start Address Lo Quantity of Input Hi Quantity of Input Lo Error Check (CRC) -- Slave Address: (1 Byte) Function: 02H (1 Byte) Start Address: Start address is 1 Quantity of Input: (1 Byte) Error Check: CRC (2 Byte)

29 Response: Slave Address Function 02 Byte Count Data (Input Status) Error Check(CRC) -- Slave Address: (1 Byte) Function: 02H (1 Byte) Byte Count: 2 Data: 2 Byte Error Check: CRC (2 Byte) Read Input Registers (04H): Query: Slave Address Function 04 Register Address Hi Register Address Lo Number of Point Hi Number of Point Lo 02 Error Check (CRC) -- Slave Address: (1 Byte) Function: 04H (1 Byte) Register Address: Start address is H Number of Point: (4 Byte) Error Check: CRC (2 Byte) Response: Slave Address Function 04 Byte Count 04 Data Hi (Address 256) Data Lo (Address 256) Data Hi (Address 257) Data Lo (Address 257) Error Check(CRC) -- Slave Address: (1 Byte) Function: 04H (1 Byte) Byte Count: 4 Data: 4 Byte Error Check: CRC (2 Byte)

30 Error Message: Response: Slave Address Error Function 83 Error Status Error Check(CRC) -- Slave Address: (1 Byte) Function: Send Function Plus 80H (1 Byte) Error Status: (1 Byte) H illegal function 02H illegal data address 03H illegal data value Error Check: CRC (2 Byte) Read File Record (14H): Query: Slave Address Function 14 Byte Count 07 Sub-Req, x Referencr Type 06 Sub-Req, x File Number Hi Sub-Req, x File Number Lo Sub-Req, x Record Number Hi Sub-Req, x Record Number Lo Sub-Req, x Record Length Hi Sub-Req, x Record Length Lo 02 Error Check (CRC) -- Slave Address: (1 Byte) Function: 14H (1 Byte) Byte Count: 0x07 ~ 0xF5 Sub-Req, x Referencr Type: 0x06 Sub-Req, x File Number: 1 ~ 0xFFFF Sub-Req, x Record Number: 0 ~ 9999 Sub-Req, x Record Length: 1 ~ N Error Check: CRC (2 Byte) Response: Slave Address Function 14 Resp Data Length 06 Sub-Req, x File Resp. Length 05 Sub-Req, x Referencr Type 06 Sub-Req, x Record Data Hi (1) Sub-Req, x Record Data Lo Sub-Req, x Record Data Hi (2) Sub-Req, x Record Data Lo Error Check (CRC) -- Slave Address: (1 Byte) Function: 14H (1 Byte) Resp Data Length: (Sub-Req, x) Data + 1 Sub-Req, x File Resp. Length: N * Sub-Req, x Referencr Type: 0x06 Sub-Req, x Record Data: N * 2 Byte Error Check: CRC (2 Byte)

31 Write File Record (15H): Query: Slave Address Function 15 Request Data Length 09 Sub-Req, x Referencr Type 06 Sub-Req, x File Number Hi Sub-Req, x File Number Lo Sub-Req, x Record Number Hi Sub-Req, x Record Number Lo Sub-Req, x Record Length Hi Sub-Req, x Record Length Lo Sub-Req, x Record Data Hi (1) Sub-Req, x Record Data Lo Error Check (CRC) -- Slave Address: (1 Byte) Function: 15H (1 Byte) Request Data Length: 0x09 ~ 0xFB Sub-Req, x Referencr Type: 0x06 Sub-Req, x File Number: 1 ~ 0xFFFF Sub-Req, x Record Number: 0 ~ 9999 Sub-Req, x Record Length: 1 ~ N Sub-Req, x Record Data: N*2 Byte Error Check: Response: CRC (2 Byte) Slave Address Function 15 Request Data Length 09 Sub-Req, x Referencr Type 06 Sub-Req, x File Number Hi Sub-Req, x File Number Lo Sub-Req, x Record Number Hi Sub-Req, x Record Number Lo Sub-Req, x Record Length Hi Sub-Req, x Record Length Lo Sub-Req, x Record Data Hi (1) Sub-Req, x Record Data Lo Error Check (CRC) -- Slave Address: (1 Byte) Function: 15H (1 Byte) Request Data Length: 0x09 ~ 0xFB Sub-Req, x Referencr Type: 0x06 Sub-Req, x File Number: 1 ~ 0xFFFF Sub-Req, x Record Number: 0 ~ 9999 Sub-Req, x Record Length: 1 ~ N Sub-Req, x Record Data: N*2 Byte Error Check: CRC (2 Byte)

32 3-5. Table of registers FUNCTION (03H) Address WORD Description Range 02H 1 Address / Baud-Rate 1 ~ 255,0 ~ 9 03H 1 Parity / Stop-Bit 0 ~ 2,0 ~ 1 04H 1 PT 1 ~ H 1 PT(10^n) 0 ~ -3 06H 1 CT 1 ~ H 1 CT(10^n) 0 ~ -3 08H 1 Voltage Range 0 ~ 5 09H 1 Current Range 0 ~ 5 0AH 1 Range Mode Bit 0,1 * Address / Baud-Rate: Address (High Byte) 1 ~ 255 Baud-Rate (Low Byte) 0 ~ * Parity / Stop-Bit: Parity (High Byte) 0 ~ 2 0 no parity 1 odd 2 Even Stop-Bit (Low Byte) 0 ~ Stop-Bit * PT /* CT: 1 ~ 9999 * PT(10^n)/ * CT(10^n): 0 ~ -3 * Voltage Range: 0~5 * Current Range: 0~5 * RangeMode: BIT0 V, BIT1 A 0 Manual, 1 AUTO 1 2 Stop-Bit FUNCTION (06H, 10H) Address WORD Description Range 02H 1 Address / Baud-Rate 1 ~ 255,0 ~ 9 03H 1 Parity / Stop-Bit 0 ~ 2,0 ~ 1 04H 1 PT 1 ~ H 1 PT(10^n) 0 ~ -3 06H 1 CT 1 ~ H 1 CT(10^n) 0 ~ -3 08H 1 Voltage Range 0 ~ 5 09H 1 Current Range 0 ~ 5 0AH 1 Range Mode Bit 0,1 0DH 1 Setting Parameters 0 ~ 37 * Address / Baud-Rate: Address (High Byte) 1 ~ 255 Baud-Rate (Low Byte) 0 ~ * Parity / Stop-Bit: Parity (High Byte) 0 ~

33 0 no parity 1 odd 2 Even Stop-Bit (Low Byte) 0 ~ Stop-Bit 1 2 Stop-Bit * PT /* CT: 1 ~ 9999 * PT(10^n)/ * CT(10^n): 0 ~ -3 * Voltage Range: 0~5 * Current Range: 0~5 * RangeMode: BIT0 V, BIT1 A 0 Manual, 1 AUTO FUNCTION (14H/15H) Record File 4 (14H) Address WORD Description Range 03H 1 Voltage (10^n) n = -4 ~ 6 04H 1 Current(10^n) n = -4 ~ 6 05H 1 Watt/VA/VAR (10^n) n = -8 ~ 12 06H 1 CH1 Hz(10^n) n = -1 ~ 2 0DH 1 CH1 Power Factor 0 ~ ±10 0EH CH1 Hz (High Word) Unsigned INT FH CH1 Hz (Low Word) / Float 32 10H CH1 Voltage (rms) (High Word) Unsigned INT H CH1 Voltage (rms) (Low Word) / Float 32 12H CH1 Current (rms) (High Word) Unsigned INT H CH1 Current(rms) (Low Word) / Float 32 14H CH1 Watt (High Word) Signed INT H CH1 Watt (Low Word) / Float 32 16H CH1 VA (High Word) Unsigned INT H CH1 VA (Low Word) / Float 32 18H CH1 VAR (High Word) Signed INT H CH1 VAR (Low Word) / Float 32 1AH 1 CH1 V-CF 0 ~ 6. 1BH 1 CH1 A-CF 0 ~ 6. Record File 6 (14H/15H) Address WORD Descirption Range H 1 Mode 2 Display 1 Item 0~ 8 H 1 Mode 2 Display 2 Item 0~ 8 02H 1 Mode 2 Display 3 Item 0~ 8 03H 1 Mode 2 Display 4 Item 0~ 8 04H 1 Mode 2 Display 5 Item 0~ 8 05H 1 Mode 2 Display 6 Item 0~ 8 06H 1 Mode 2 Display 7 Item 0~ 8 07H 1 Mode 2 Display 8 Item 0~ 8 08H 1 Mode 2 Display 9 Item 0~ 8 09H 1 Mode 1 Display 1 Item 0~ 8 0AH 1 Mode 1 Display 2 Item 0~ 8 0BH 1 Mode 1 Display 3 Item 0~ 8 0CH 1 Mode 1 Display 4 Item 0~ 8 Display Item: 0 V 1 A 2 W 3 VA 4 VAR 5 PF 6 Hz 7 Vcf 8 Acf