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Page  15 

Communication Setup 

As shown below, Accura 7500 features the meter and protection relay sections located on the left 

and right side from the center line. 

 

Fig 2.1 Screen Composition on the Front     

 

 

The control method and screen composition of the meter part is same to those of Accura 3300 and 

3500. Therefore, communication setup can be performed in the same way as in Accura 3300 and 

3500 devices.   

 

The following modes are operated with the buttons on the meter section[Menu, Up, Down, ENTER]. 

 

Mode 

Description 

Display mode 

Shows all measurement parameters 

Setup mode 

Sets operation parameters [wiring, communication, etc].   

Reset mode 

Resets 

“Energy, Demand, Maximum and Minimum”

 values.   

System mode 

Shows system information [Option, Firmware version, etc].   

 

 

 

Meter 

Protection relay 

Содержание ACCURA 7500

Страница 1: ...ACCURA 7500 Integrated Digital Protection Relay High Accuracy Power Meter Communication User s Manual English Rev 1 0...

Страница 2: ...by qualified competent personnel that have received appropriate training and experience with high voltage and current devices Caution Failure to observe the following instructions may result in sever...

Страница 3: ...specifications shown in this User Guide without notice Therefore we recommend that customers should obtain the latest information on specifications of the device before making orders In the absence o...

Страница 4: ...ts discretion whether to repair or replace it or give a refund for the product for when the warranty period for the product expired or issues related to the product are not applicable for warranty ter...

Страница 5: ...l purchaser is responsible for determining the feasibility of such suggestions and should conduct tests to prove their feasibility It is the original purchaser s responsibility to determine the suitab...

Страница 6: ...Page 6 Standard Compliance Process Control Equipment E324900...

Страница 7: ...Page 7 Revision History The following versions of the Accura 7500 Communication User Guide has been released Revision Date Description Revision 1 0 November 11 2020 First issue...

Страница 8: ...s 20 Packet Communication 21 Function 03 Read Holding Registers 21 Function 06 Write a Single Register to Meter 22 Function 16 Write Multiple Registers to Meter 22 Reserved Registers 23 Invalid Regist...

Страница 9: ...7 OCR section 48 NSOCR section 48 OCGR section 49 OVR section 49 UVR section 50 POR section 50 NSOVR section 51 OVGR section 51 SGR section 52 MOTOR Protection Section 53 Short form Data Block Section...

Страница 10: ...riable Scale 68 APPENDIX A CRC 16 Calculation 70 CRC 16 Generation 70 CRC Generation procedure 70 APPENDIX B Modbus RTU C Code Example 72 Data Reception and CRC Generation Checking 72 Request Packet G...

Страница 11: ...nformation on the communications loop A slave device responds only when there is a request from a master device All communications occur in the form of packets which consist of bytes All packets trans...

Страница 12: ...decrease communication reliability To connect an RS 485 communication line to a PC supports only the RS 232 port a RS 485 to RS 232 converter RTS CTS automatic control required should be used For comm...

Страница 13: ...he same and the time interval between frames is recognized as the same packet for the condition where the distance between frames is within 5ms At least 10ms is required for packet recognition Holding...

Страница 14: ...ew type terminal Pluggable Wire specs 1 25 to 3 5 mm2 24 to 14 AWG Shielded twisted pair Communication cable length 1219m 4000ft Maximum number of connected devices per bus 32 Note It is recommended t...

Страница 15: ...Accura 3300 and 3500 Therefore communication setup can be performed in the same way as in Accura 3300 and 3500 devices The following modes are operated with the buttons on the meter section Menu Up Do...

Страница 16: ...set values on the menu can be edited Button functions in the menu edit mode Button Function Increases the displayed preset values of the menu 1 Decreases the displayed preset values of the menu 2 Save...

Страница 17: ...5 Protocol Modbus RTU Rootech 1 6 Baud rate bps 1200bps 2400bps 4800bps 9600bps 19200bps 38400bps 2 7 Parity bit Even parity Odd parity None parity 8 1 2 1 1 Used for manufacturers only 2 At 38400 bps...

Страница 18: ...e data and make a request for the address Function Field The function field of a Modbus RTU packet is one byte in length and tells the slave device what request has been made by users Function Decimal...

Страница 19: ...more details of the CRC 16 algorithm refer to the Appendix A B of this document Packet Format Slave address Function Data Error check 1 byte 1 byte N 2 bytes 2 bytes Exception Responses If a master de...

Страница 20: ...o send the same commands to multiple slave devices simultaneously A broadcast request packet is the same as a normal request packet except the slave address field is set to zero All Slave devices rece...

Страница 21: ...nction Starting address Word count Error check 03 1 byte 1 byte 2 bytes 2 bytes 2 bytes Example The relay 1 sends data on A phase voltage address 40101 and B phase voltage address 40102 in the followi...

Страница 22: ...ord Error Check 01 06 00 34 00 78 C8 26 Response In addition to the response to Function 06 command the relay re sends the request packet Example The response to the above request packet is as follows...

Страница 23: ...Data Word1 01 10 00 34 00 02 04 00 78 Data Word2 Error Check 00 0A F1 56 Response Slave Function Starting Address Word Count Error Check 10 1 byte 1 byte 2 bytes 2 bytes 2 bytes Example The response t...

Страница 24: ...urrent x y 40607 40997 Waveform Voltage waveform current waveform 40998 41000 Invalid 41001 41097 Demand Trend Total kW demand trend 41098 41100 Invalid 41101 41107 Reset kWh reset kVARh reset kVAh re...

Страница 25: ...43221 43234 OCGR Inverse Definite time Instantaneous OCGR Inverse OCGR2 43235 43240 Invalid 43241 43246 OVR Definite time Instantaneous OVR 43247 43260 Invalid 43261 43278 UVR Definite time UVR Defini...

Страница 26: ...R Serial number UINT32 Product serial number Refer to Data Formats 40004 R Reserved UINT16 40005 R Reserved UINT16 40006 R Reserved UINT16 40007 R Reserved UINT16 40008 R Reserved UINT16 40009 R Reser...

Страница 27: ...0bps 5 38400bps 40057 R W Parity bit UINT16 2 Even parity 0 None parity 1 Odd parity 2 Even parity 40058 R W Stop bit UINT16 0 1 stop bit 0 1 stop bit 1 2 stop bits 40059 R Reserved UINT16 40060 R Res...

Страница 28: ...23 R Total kW INT16 VSB 40124 40124 R Total kW Scale UINT16 40125 R kVAR a INT16 VSB 40128 40126 R kVAR b INT16 VSB 40128 40127 R kVAR c INT16 VSB 40128 40128 R kW Scale UINT16 40129 R Total kVAR INT1...

Страница 29: ...Attribute Measurement Format Scale Descriptions 40157 40158 R W kWh received 1 UINT32 x1 Data Format 40159 40160 R W kWh delivered 2 UINT32 x1 Data Format 40161 40162 R kWh total 3 kWh received kWh de...

Страница 30: ...nd UINT16 VSB 40322 40320 R Current c peak demand UINT16 VSB 40322 40321 Reserved UINT16 40322 R Current peak demand Scale UINT16 40323 R Voltage a maximum UINT16 VSA 40331 40324 R Voltage b maximum U...

Страница 31: ...oltage average minimum UINT16 VSA 40367 40363 R Line Voltage ab minimum UINT16 VSA 40367 40364 R Line Voltage bc minimum UINT16 VSA 40367 40365 R Line Voltage ca minimum UINT16 VSA 40367 40366 R Line...

Страница 32: ...e c UINT16 x0 1 40467 R 2nd harmonic of Voltage c UINT16 x0 1 UINT16 x0 1 40464 R 31st harmonic of Voltage c UINT16 x0 1 40497 R DC Current a UINT16 x0 1 40498 R 1st harmonic of Current a UINT16 x0 1...

Страница 33: ...UINT16 40600 R Current a x INT16 x1 40601 R Current a y INT16 x1 40602 R Current b x INT16 x1 40603 R Current b y INT16 x1 40604 R Current c x INT16 x1 40605 R Current c y INT16 x1 40606 R Reserved U...

Страница 34: ...served UINT16 x1 40739 R 1st Waveform data of Voltage b INT16 x1 40740 R 2nd Waveform data of Voltage b INT16 x1 INT16 x1 40802 R 64th Waveform data of Voltage b INT16 x1 40803 R Reserved UINT16 x1 40...

Страница 35: ...d UINT16 41100 Invalid UINT16 Refer to Measurement Value Calculation Reset section Address Attribute Measurement Format Descriptions 41101 W kWh Reset UINT16 0x00FF kWh Reset 41102 W kVARh Reset UINT1...

Страница 36: ...ital Input channel 10 UINT16 0x00FF On 0x0000 Off 41211 R W Digital Output channel 1 UINT16 0x00FF On 0x0000 Off 41212 R W Digital Output channel 2 UINT16 0x00FF On 0x0000 Off 41213 R W Digital Output...

Страница 37: ...rved 41241 R Remote Local Mode Flag UINT16 0x00FF Local mode 0x0000 Remote mode 41242 R Protection Block Flag UINT16 0x00FF Set 0x0000 Not Set 41243 R CB Failure Detection Flag UINT16 0x00FF Set 0x000...

Страница 38: ...current Ia2 S1 UINT16 41520 R Zero sequence current Ia0 S1 UINT16 41521 R Fundamental current A maximum S1 UINT16 41522 R Fundamental current B maximum S1 UINT16 41523 R Fundamental current C maximum...

Страница 39: ...Reset 41604 W All Records Reset UINT16 0x00FF Reset Request 0x0000 Not Reset Invalid UINT16 42000 Invalid UINT16 Maintenance section Address Attribute Measurement Format Descriptions 42001 42002 R Tot...

Страница 40: ...Refer to Value Table T2 42037 R Record N Cause UINT16 Refer to Value Table T3 42038 R Reserved UINT16 42039 R Record N Ia Magnitude S1 INT16 42040 R Record N Ib Magnitude S1 INT16 42041 R Record N Ic...

Страница 41: ...fer to Value Table T1 42113 42114 R Time of Selected Waveform UINT32 Refer to Value Table T2 42115 R Cause of Selected Waveform UINT16 4 Pickup 42116 R Reserved UINT16 42117 R 1st Data of Selected Cyc...

Страница 42: ...Request Save Address 43001 43004 UINT16 0x00FF Save Request 0x0000 Do not save LCD 43006 R W Backlight On time on LCD UINT16 1 60 min 43007 R W Contrast on LCD UINT16 10 250 10 43008 R W Save Request...

Страница 43: ...38 R W CB Failure Aux Relay UINT16 Refer to Value Table T10 43039 R W CB Failure Current Tap S1 UINT16 0 1 10 0 0 1 A 43040 R W CB Failure Time Delay S1 UINT16 0 1 10 0 0 1 sec 43041 R W CB Failure Fu...

Страница 44: ...T11 43057 R W Cold Load Pickup UINT16 Refer to Value Table T11 43058 R W CB Close Block UINT16 Refer to Value Table T11 43059 R W Digital Input Save Request Save Address 43051 43053 43058 43060 43063...

Страница 45: ...T16 Refer to Value Table T12 43082 R W Aux DO4 Dwell Time UINT16 1 600 1sec 43083 R W Aux DO5 Relay Type UINT16 Refer to Value Table T12 43084 R W Aux DO5 Dwell Time UINT16 1 600 1sec 43085 R W Aux DO...

Страница 46: ...n UINT16 Refer to Value Table T10 43109 R W DO Relay Interconnection Save Request Save Address 43101 43124 43150 43155 UINT16 0x00FF Save Request 0x0000 Not Save 43110 R W TRIP Interconnection UINT16...

Страница 47: ...Table T10 43134 R W DI7 Input Type UINT16 Refer to Value Table T7 43135 R W DI8 Interconnection UINT16 Refer to Value Table T10 43136 R W DI8 Input Type UINT16 Refer to Value Table T7 43137 R W DI9 In...

Страница 48: ...quest Save Address 43201 43209 UINT16 0x00FF Save Request 0x0000 Not Save Supported in F W version 5 0 or lower From Version 5 0 if the definite time of the OCR Delay is set to 0 05 sec the instantane...

Страница 49: ...equest Save Address 43221 43234 UINT16 0x00FF Save Request 0x0000 Do Not Save Inverse OCGR2 43231 R W Function UINT16 Refer to Value Table T9 43232 R W Selected Curve UINT16 Refer to Value Table T13 4...

Страница 50: ...Not Save Definite time UVR2 43271 R W Function UINT16 Refer to Value Table T9 43272 R W Tap Pickup value UINT16 20 220 1 V 43273 R W Delay S2 UINT16 0 03 60 00 0 01 sec 43274 R W Reset Time Delay UINT...

Страница 51: ...F Save Request 0x0000 Do Not Save Invalid UINT16 43300 Invalid UINT16 OVGR section Address Attribute Measurement Format Descriptions Definite time OVGR 43301 R W Function UINT16 Refer to Value Table T...

Страница 52: ...16 43328 R W Save Request for All Relay Data Save Address 43201 43209 43221 43234 43241 43245 43261 43278 43281 43283 43301 43305 43321 43325 43329 43336 UINT16 0x00FF Save Request 0x0000 Do Not Save...

Страница 53: ...20 00 0 01 x Im S2 UNIT16 Pickup Value 43354 R W 0 05 60 00 0 01 sec S2 UINT16 Time Delay Starting Overcurrent 43355 R W Function UINT 16 Refer to Value Table T9 43356 R W 0 50 10 00 0 01 A S2 UINT16...

Страница 54: ...Voltage a FLOAT Refer to Data Formats 49003 49004 R Voltage b FLOAT Refer to Data Formats 49005 49006 R Voltage c FLOAT Refer to Data Formats 49007 49008 R Voltage ab FLOAT Refer to Data Formats 4900...

Страница 55: ...el 6 Bit 6 Channel 7 Bit 7 Channel 8 Bit 8 Channel 9 Bit 9 Channel 10 Bit 10 Reserved Bit 11 Reserved Bit 12 Reserved Bit 13 Reserved Bit 14 Reserved Bit 15 CB status UINT16 Bit 1 On Bit 0 Off 49061 R...

Страница 56: ...Bit 9 Inst UVR Instantaneous UVR Bit 10 Def POR Definite time POR Bit 11 Def OVGR Definite time OVGR Bit 12 Inst OVGR Instantaneous OVGR Bit 13 Def SGR1 Definite time SGR1 Bit 14 Def SGR2 Definite ti...

Страница 57: ...st OVGR Instantaneous OVGR Bit 13 Def SGR1 Definite time SGR1 Bit 14 Def SGR2 Definite time SGR2 Bit 15 Def GR Definite time GR UINT16 Bit 1 On Bit 0 Off 49081 R Phase A Fault Status Bit 0 Inv OCGR2 I...

Страница 58: ...t 6 51LR Definite time 51LR Bit 7 Starting motor Inverse 48 Bit 8 Def UCR Definite time UCR Bit 9 Def NSOVR Definite time NSOVR UINT16 Bit 1 On Bit 0 Off 49085 R Reserved UINT16 49086 R Reserved UINT1...

Страница 59: ...2 12pm 23 11pm 0x00FF Bit7 bit0 Minutes 0 to 59 in step of 1 2nd 16bits Seconds xx xx SS SS 0xFFFF bit15 bit0 0 00 00s 1 00 01s 5999 59 99s If the time has never been set the value for all 32 bits wil...

Страница 60: ...tantaneous Definite time UVR In F W Version 4 0 or lower it is Definite time UVR 10 Reserved In F W Version 4 0 or lower it is Instantaneous UVR 11 Definite time POR 12 Definite time OVGR 13 Instantan...

Страница 61: ...00FF Bit 7 0 Causes of Events 1 OCR relay function settings are changed 2 OCGR relay function settings are changed 3 OVR relay function settings are changed 4 UVR relay function settings are changed 5...

Страница 62: ...n Setup Value Descriptions 0x0000 N Disable 0x0001 Y Enable T5 Motor Operation Status Value Descriptions 0x0000 By CB Status 0x0001 By Current Value T6 T8 Reserved T9 Relay Function Value Descriptions...

Страница 63: ...x0003 KEPCO NI KEPCO Normal Inverse 0x0004 KEPCO VI KEPCO Very Inverse 0x0005 IEC LI T14 Fault Pickup Status 1 Value Descriptions 0x0000 None Bit 0 High 1 Inverse OCR 51P Bit 1 High 1 Instantaneous De...

Страница 64: ...ed by a scale of a certain value for each and the value varies depending on the value of the selected channel address 42106 Selected channel address 42106 T16 Fault Pickup Status 2 Value Descriptions...

Страница 65: ...ormula for converting to 32bit data is as follows Register value Upper register x 65536 lower register UINT32 Unsigned 32bit Both the upper and lower registers are unsigned 16bit integers Example If u...

Страница 66: ...epresents the scale and the real value is calculated by multiplying it by 0 01 It is the same as the fixed scale x0 01 Real measured value Measured value x S2 0 01 Example If OCR Inverse Level registe...

Страница 67: ...0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 s Exponent Mantissa Example Register High Low Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 1 1 0 0 0 1 0 0 1 1 1 0 0 0 0 1 0...

Страница 68: ...egister address VSA is Variable Scale Type A The real value is the value measured by multiplying it by the variable scale value and x0 1 Variable scale value indicates one of the values 1 10 100 and 1...

Страница 69: ...alue indicates one of the values 1 10 100 1000 Real measured value Measured value x Variable scale value x 0 001 Example Address Attribute Measurement Format Scale Descriptions 40110 R Current UINT16...

Страница 70: ...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...

Страница 71: ...f80 ef41 2d00 edc1 ec81 2c40 e401 24c0 2580 e541 2700 e7c1 e681 2640 2200 e2c1 e381 2340 e101 21c0 2080 e041 a001 60c0 6180 a141 6300 a3c1 a281 6240 6600 a6c1 a781 6740 a501 65c0 6480 a441 6c00 acc1 a...

Страница 72: ...Request Packet Generation Main module Read Holding Registers Request Example define CRC_16 0xA001 unsigned int Crc Table 256 main unsigned char send_byte 12 unsigned short crc_out MakeCrcTable CRC_16...

Страница 73: ...PacketLen status CheckCrc receive_byte PacketLen unsigned int GenCrc unsigned int Data unsigned int Polynomial unsigned int crc unsigned int ccc Reverse CRC Modicon Crc for ccc 0 ccc 8 ccc if Data cr...

Страница 74: ...puchMsg unsigned short usDataLen unsigned char uchCRCHi 0xFF unsigned char uchCRCLo 0xFF unsigned uIndex while usDataLen uIndex uchCRCHi puchMsg uchCRCHi uchCRCLo CrcTable uIndex 0xFF uchCRCLo CrcTab...

Страница 75: ......

Страница 76: ...ies www rootech com sales rootech com 2006 Rootech Inc All Rights Reserved Accura 2300 2350 Accura 2300S 2350 Accura 2700 2750 Accura 3000 Accura 3300S 3300 Accura 3300E Accura 3500S 3500 Accura 3550S...

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