GE 489 Communications Manual
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GE 489 Communications Manual

Generator management relay
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GE
Grid Solutions
GE Grid Solutions
650 Markland Street
Markham, Ontario
Canada L6C 0M1
Tel: +1 905 927 7070 Fax: +1 905 927 5098
Internet:
http://www.gegridsolutions.com
*1601-0149-A8*
489
Generator Management Relay
COMMUNICATIONS GUIDE
Software Revision: 4.0x
GE Publication Code: GEK-106495H
GE Multilin Part Number: 1601-0149-A8
Copyright © 2017 GE Multilin Inc.
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  • Page 1 Generator Management Relay COMMUNICATIONS GUIDE Software Revision: 4.0x GE Publication Code: GEK-106495H GE Multilin Part Number: 1601-0149-A8 Copyright © 2017 GE Multilin Inc. GE Grid Solutions 650 Markland Street Markham, Ontario Canada L6C 0M1 Tel: +1 905 927 7070 Fax: +1 905 927 5098 Internet: http://www.gegridsolutions.com...

  • Page 3: Table Of Contents

    01/02) ........CG-60 INARY NPUT INARY NPUT HANGE BJECTS 10/12) ........CG-64 INARY ONTROL ELAY UTPUT LOCK BJECTS 20/21) ............. CG-65 INARY ROZEN OUNTER BJECTS 30/32) ............ CG-66 NALOG NPUT NPUT HANGE BJECTS 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE CGTOC–I...
  • Page 4 TABLE OF CONTENTS CGTOC–II 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...

  • Page 5: Modbus Protocol

    120 Ω for standard #22 AWG twisted pair wire. Shielded wire should always be used to minimize noise. Polarity is important in RS485 communications. Each '+' terminal of every 489 must be connected together for the system to operate. Refer to the 489 Instruction Manual for correct serial port wiring.

  • Page 6: Data Frame Format And Data Rate

    CG.1.3 Data Frame Format and Data Rate One data frame of an asynchronous transmission to or from a 489 is default to 1 start bit, 8 data bits, and 1 stop bit. This produces a 10-bit data frame. This is important for transmission through modems at high bit rates (11 bit data frames are not supported by Hayes modems at bit rates of greater than 300 bps).

  • Page 7: Crc-16 Algorithm

    If a 489 Modbus slave device receives a transmission in which an error is indicated by the CRC-16 calculation, the slave device will not respond to the transmission. A CRC-16 error...

  • Page 8: Timing

    (i.e. all slaves start listening for a new transmission from the master). Thus at 9600 baud a delay of greater than 3.5 × 1 / 9600 × 10 = 3.65 ms will cause the communication link to be reset. 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...

  • Page 9: Modbus Functions

    Function Code 08: Loopback Test • Function Code 16: Store Multiple Setpoints A detailed explanation of how the 489 implements these function codes is shown in the following sections. CG.2.2 Function Codes 03/04: Read Setpoints / Actual Values Modbus implementation: Read Input and Holding Registers...
  • Page 10 Modbus Implementation: Preset Single Register 489 Implementation: Store Single Setpoint This command allows the master to store a single setpoint into the 489 memory. The slave response to this function code is to echo the entire master transmission. 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 11 This function reads the selected device status. A short message length allows for rapid reading of status. The returned status byte has individual bits set to 1 or 0 depending on the slave device status. The 489 general status byte is shown below: Description...

  • Page 12: Test

    CG.2.6 Function Code 08: Loopback Test Modbus Implementation: Loopback Test 489 Implementation: Loopback Test This function is used to test the integrity of the communication link. The 489 will echo the request. Message Format and Example: Loopback test from slave 11.

  • Page 13: C Ommands

    16 (10h), a certain sequence of commands must be written at the same time to the 489. The sequence consists of: Command Function register, Command operation register and Command Data (if required). The Command Function register must be written with the value of 5 indicating an execute operation is requested.

  • Page 14: Error Responses

    CG.2.9 Error Responses When a 489 detects an error other than a CRC error, a response will be sent to the master. The MSbit of the Function Code byte will be set to 1 (i.e. the function code sent from the slave will be equal to the function code sent from the master plus 128).

  • Page 15: Modbus Memory Map

    CG.3 Modbus Memory Map CG.3.1 Memory Map Information The data stored in the 489 is grouped as Setpoints and Actual Values. Setpoints can be read and written by a master computer. Actual Values are read only. All Setpoints and Actual Values are stored as two byte values. That is, each register address is the address of a two-byte value.
  • Page 16 CG.3.4 Waveform Capture The 489 stores up to 64 cycles of A/D samples in a waveform capture buffer each time a trip occurs. The waveform capture buffer is time and date stamped and may therefore be correlated to a trip in the event record.
  • Page 17 1 read from this register indicates that the user has full access rights to changing setpoints from the given port. CG.3.7 489 Memory Map The 489 memory map is shown in the following table. Table CG–1: 489 Memory Map (Sheet 1 of 30) ADDR...
  • Page 18 Table CG–1: 489 Memory Map (Sheet 2 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT STATUS / SYSTEM STATUS 0210 General Status 0 to 65535 F140 0211 Output Relay Status 0 to 63 F141 0212 Active Setpoint Group 0 to 1...
  • Page 19 Table CG–1: 489 Memory Map (Sheet 3 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 0288 Field-Breaker Discrepancy Pickup 0 to 4 – F123 0289 Tachometer Pickup 0 to 4 – F123 028A Offline Overcurrent Pickup 0 to 4 –...
  • Page 20 Table CG–1: 489 Memory Map (Sheet 4 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 030A Ground Overcurrent Pickup 0 to 4 – F123 030B Undervoltage Pickup 0 to 4 – F123 030C Overvoltage Pickup 0 to 4 –...
  • Page 21 Table CG–1: 489 Memory Map (Sheet 5 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 0386 Assignable Digital Input 5 State 0 to 1 – F207 0387 Assignable Digital Input 6 State 0 to 1 – F207 0388 Assignable Digital Input 7 State 0 to 1 –...
  • Page 22 Table CG–1: 489 Memory Map (Sheet 6 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 0466 Neutral Voltage Angle 0 to 359 – METERING DATA / POWER METERING 0480 Power Factor –100 to 100 – 0481 Real Power –2000000 to 2000000...
  • Page 23 Table CG–1: 489 Memory Map (Sheet 7 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT LEARNED DATA / PARAMETER AVERAGES 0600 Average Generator Load 0 to 2000 %FLA 0601 Average Negative Sequence Current 0 to 2000 %FLA 0602 Average Phase-Phase Voltage...
  • Page 24 Table CG–1: 489 Memory Map (Sheet 8 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 0783 Sequential Trips 0 to 50000 – 0784 Field-Breaker Discrepancy Trips 0 to 50000 – 0785 Tachometer Trips 0 to 50000 – 0786 Offline Overcurrent Trips 0 to 50000 –...
  • Page 25 Table CG–1: 489 Memory Map (Sheet 9 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 1006 Passcode (Write Only) 0 to 99999999 Encrypted Passcode (Read Only) 1008 Note: From version 4.06 onward, relay response to read request is 00000000.
  • Page 26 Table CG–1: 489 Memory Map (Sheet 10 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 11C5 Generator Phase Sequence 0 to 2 – F124 SYSTEM SETUP / SERIAL START/STOP 11E0 Serial Start/Stop Initiation 0 to 1 – F105 11E1...
  • Page 27 Table CG–1: 489 Memory Map (Sheet 11 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 1261 General Input C Trip 0 to 2 – F115 1262 Assign Trip Relays (1-4) 0 to 3 – 1263 General Input C Trip Delay...
  • Page 28 Table CG–1: 489 Memory Map (Sheet 12 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 12D1 Asserted Digital Input State 0 to 1 – F131 12D2 Input Name 0 to 12 – 12D8 Block Input From Online 0 to 5000...
  • Page 29 Table CG–1: 489 Memory Map (Sheet 13 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 1400 1 Trip 0 to 1 – F117 1401 2 Auxiliary 0 to 1 – F117 1402 3 Auxiliary 0 to 1 – F117...
  • Page 30 Table CG–1: 489 Memory Map (Sheet 14 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 161D FlexCurve™ Trip Time at 3.30 × PU 0 to 65535 65535 161E FlexCurve™ Trip Time at 3.40 × PU 0 to 65535 65535 161F FlexCurve™...
  • Page 31 Table CG–1: 489 Memory Map (Sheet 15 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 1652 FlexCurve™ Trip Time at 19.0 × PU 0 to 65535 65535 1653 FlexCurve™ Trip Time at 19.5 × PU 0 to 65535 65535 1654 FlexCurve™...
  • Page 32 Table CG–1: 489 Memory Map (Sheet 16 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 1742 FlexCurve™ Trip Time at 3.40 × PU 0 to 65535 65535 1743 FlexCurve™ Trip Time at 3.50 × PU 0 to 65535 65535 1744 FlexCurve™...
  • Page 33 Table CG–1: 489 Memory Map (Sheet 17 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 1777 FlexCurve™ Trip Time at 19.5 × PU 0 to 65535 65535 1778 FlexCurve™ Trip Time at 20.0 × PU 0 to 65535 65535...
  • Page 34 Table CG–1: 489 Memory Map (Sheet 18 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 2040 Volts/Hertz Alarm 0 to 2 – F115 2041 Assign Alarm Relays (2-5) 1 to 4 – 2042 Volts/Hertz Alarm Pickup 50 to 199 ×...
  • Page 35 Table CG–1: 489 Memory Map (Sheet 19 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 20CA Neutral Overvoltage Curve Reset Rate 0 to 9999 20CB Neutral Overvoltage Trip Element 0 to 1 – F208 VOLTAGE ELEMENTS / NEUTRAL UNDERVOLTAGE (3rd HARMONIC)
  • Page 36 Table CG–1: 489 Memory Map (Sheet 20 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 220F Negative Mvar Trip Delay 2 to 1200 2210 Positive Mvar Trip Delay 2 to 1200 2211 Positive Mvar Alarm Delay 2 to 1200...
  • Page 37 Table CG–1: 489 Memory Map (Sheet 21 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 24A0 RTD #3 Application 0 to 4 – F121 24A1 RTD #3 Alarm 0 to 2 – F115 24A2 Assign Alarm Relays (2-5) 1 to 4 –...
  • Page 38 Table CG–1: 489 Memory Map (Sheet 22 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 25A9 RTD #7 Name 0 to 8 – RTD TEMPERATURE / RTD #8 25E0 RTD #8 Application 0 to 4 – F121 25E1 RTD #8 Alarm 0 to 2 –...
  • Page 39 Table CG–1: 489 Memory Map (Sheet 23 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 26E7 Assign Trip Relays (1-4) 0 to 3 – 26E8 RTD #12 Trip Temperature 1 to 250 °C 26E9 RTD #12 Name 0 to 8 –...
  • Page 40 Table CG–1: 489 Memory Map (Sheet 24 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 2846 Time to Trip at 20.0 × FLA 5 to 999999 2848 Minimum Allowable Voltage 70 to 95 2849 Stall Current at Minimum Voltage 200 to 1500 ×...
  • Page 41 Table CG–1: 489 Memory Map (Sheet 25 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 2A90 MVA Demand Period 5 to 90 2A91 MVA Demand Alarm 0 to 2 – F115 2A92 Assign Alarm Relays (2-5) 1 to 4 –...
  • Page 42 Table CG–1: 489 Memory Map (Sheet 26 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 2B1D RTD #4 Maximum –50 to 250 °C 2B1E RTD #5 Minimum –50 to 250 °C 2B1F RTD #5 Maximum –50 to 250 °C...
  • Page 43 Table CG–1: 489 Memory Map (Sheet 27 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 2B5E Mvar Demand Minimum 0 to 200 × Rated 2B5F Mvar Demand Maximum 0 to 200 × Rated 2B60 MW Demand Minimum 0 to 200 ×...
  • Page 44 Table CG–1: 489 Memory Map (Sheet 28 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 2C93 Analog Input 3 Alarm Events 0 to 1 – F105 2C94 Analog Input 3 Trip 0 to 2 – F115 2C95 Assign Trip Relays (1-4) 0 to 3 –...

  • Page 45: Event Recorder

    Table CG–1: 489 Memory Map (Sheet 29 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 2D84 Fault Current Ground 0 to 2000 × CT 2D85 Fault Voltage Neutral 0 to 1000 Volts 2D86 Fault Stator RTD Temp –50 to 250 °C...

  • Page 46: Memory Map Data Formats

    Table CG–1: 489 Memory Map (Sheet 30 of 30) ADDR Name RANGE STEP UNITS FORMAT DEFAULT 302A Hottest Other RTD Temperature –50 to 250 °C 302B Hottest Ambient RTD Number 1 to 12 – 302C Hottest Ambient RTD Temperature –50 to 250 °C...
  • Page 47 Example: 2:05pm stored as 235208704 (i.e. 1st word: 0E05, 2nd word 0000) 32 bits 2’s COMPLEMENT SIGNED LONG VALUE 1st 16 bits High Order Word of Long Value 2nd 16 bits Low Order Word of Long Value Note: -1 means “Never” 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 48 16 bit integer None F104 1 A Secondary 50/0.025 Ground CT 5 A Secondary Unsigned OFF/ON SELECTION 16 bit integer F105 Unsigned VOLTAGE TRANSFORMER CONNECTION TYPE 16 bit integer None F106 Open Delta 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 49 Other Unsigned RTD VOTING SELECTION 16 bit integer RTD #1 RTD #2 RTD #3 RTD #4 RTD #5 F122 RTD #6 RTD #7 RTD #8 RTD #9 RTD #10 RTD #11 RTD #12 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 50 ALARM/TRIP STATUS 16 bit integer Not Enabled Inactive F123 Timing Out Active Trip Latched Trip Unsigned PHASE ROTATION SELECTION 16 bit integer ---- F124 Unsigned DISABLED / ENABLED SELECTION 16 bit F126 Disabled Enabled 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 51 Reactive Power (Mvar) Real Power (MW) Apparent Power (MVA) Analog Input 1 Analog Input 2 Analog Input 3 Analog Input 4 Tachometer Thermal Capacity Used Current Demand Mvar Demand MW Demand MVA Demand 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 52 CAUSE OF LAST TRIP No Event General Switch A Trip General Switch B Trip F134 General Switch C Trip General Switch D Trip General Switch E Trip General Switch F Trip General Switch G Trip 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 53 General Switch A Alarm General Switch B Alarm General Switch C Alarm General Switch D Alarm General Switch E Alarm General Switch F Alarm General Switch G Alarm Not Used Tachometer Alarm Thermal Model Alarm 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 54 Service Alarm Control Power Lost Control Power Applied Thermal Reset Close Not Used Not Used Relay Not Inserted Trip Coil Supervision Breaker Failure VT Fuse Failure Simulation Started Simulation Stopped Ground Overcurrent Trip 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 55 Simulate Pre-Fault Simulate Fault Pre-Fault to Fault Unsigned FORCE OPERATION OF RELAYS 16 bit integer Disabled 1 TRIP 2 AUXILIARY 3 AUXILIARY F139 4 AUXILIARY 5 ALARM 6 SERVICE All Relays No Relays 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 56 Each byte in this register represents one octet in the IP Address. For example: 0x015EDA1F means 1.94.218.31 Unsigned ETHERNET STATUS 16 bit integer Diagnostic Status On F152 Connection Status On Not Used Ethernet Link Status On 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 57 16 bit integer None Input 1 Input 2 F210 Input 3 Input 4 Input 5 Input 6 Input 7 Unsigned VOLTS/HERTZ ELEMENT TYPE 16 bit integer Curve #1 F211 Curve #2 Curve #3 Definite Time 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 58 Output-End CTs Unsigned DNP PORT SELECTION 16 bit integer None F216 Computer RS485 Auxiliary RS485 Front Panel RS485 Unsigned GROUND DIRECTIONAL MTA 16 bit integer 0 degrees F217 90 degrees 180 degrees 270 degrees 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 59 Unsigned BREAKER STATE 16 bit integer F218 52 Closed 52 Open/Closed Unsigned STEP-UP TRANSFORMER TYPE 16 bit integer F219 None Delta/Wye Unsigned IRIG-B TYPE 16 bit integer None F220 DC Shift Amplitude Modulated 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...

  • Page 60: Dnp Protocol

    Configurable Ë Ë Ë Ë Application Confirm None Fixed Variable Configurable Ë Ë Ë Ë (fixed value is 5000 milliseconds) Complete Appl. Response None Fixed Variable Configurable Ë Ë Ë Ë Others: (None) 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...

  • Page 61: Implementation Table

    All static data known to the relay is returned in response to a request for Class 0. This includes all objects of type 1 (Binary Input), type 10 (Binary Output), type 20 (Binary Counter), type 21 (Frozen Counter) and type 30 (Analog Input). 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 62 06, 07, 08 Class 3 Data (Note 3) 06, 07, 08 Internal Indications 00 (Note 4) No object - Cold Start No object - Warm Start No object - Delay Measurement (Note 5) 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...

  • Page 63: Default Variations

    Binary Input - Single Bit Binary Input Change With Time Binary Output Status 16-Bit Binary Counter without Flag 16-Bit Frozen Counter without Flag 32-Bit Analog Input Without Flag 32-Bit Analog Input Change Without Time 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...

  • Page 64: Dnp Point Lists

    Assignable Input 5 Closed Class 1 Assignable Input 6 Closed Class 1 Assignable Input 7 Closed Class 1 Trip Coil Supervision - Coil Detected Class 1 Assignable Input 1 Trip Active or Latched Class 1 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 65 Class 1 RTD 5 Trip Active or Latched Class 1 RTD 6 Trip Active or Latched Class 1 RTD 7 Trip Active or Latched Class 1 RTD 8 Trip Active or Latched Class 1 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 66 Neutral Undervoltage (Third Harmonic) Alarm Class 1 Active or Latched Reactive Power Alarm Active or Latched Class 1 Reverse Power Alarm Active or Latched Class 1 Low Forward Power Alarm Active / Latched Class 1 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 67 Test Switch Shorted Alarm Active or Latched Class 1 Ground Directional Alarm Active or Latched Class 1 IRIG-B Failure Alarm Active or Latched Class 1 Generator Running Hour Alarm Active or Latched Class 1 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...

  • Page 68: Binary / Control Relay Output Block (Objects 10/12

    • A Status of “Request Accepted” (0) will be returned if the command was accepted. • A Status of “Request not Accepted due to Formatting Errors” (3) will be returned if the Control Code field was incorrectly formatted or an invalid Code was present in the command. 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...

  • Page 69: Binary / Frozen Counter (Objects 20/21

    Number of Volts/Hertz Trips 50000 Number of Phase Reversal Trips 50000 Number of Underfrequency Trips 50000 Number of Overfrequency Trips 50000 Number of Neutral Overvoltage (Fundamental) Trips 50000 Number of Neutral Undervoltage (Third Harmonic) Trips 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...

  • Page 70: Analog Input / Input Change (Objects 30/32

    Many of the values reported by the 489 have a size of 32-bits and have had their upper and lower 16-bit components assigned to separate points. Where indicated, refer to the appropriate note following the table for more detail.
  • Page 71 Notes 3,8 Pre-Trip Reactive Power (kvar) Class 1 Notes 3,8 Pre-Trip Apparent Power (MVA) Class 1 Notes 3,8 Pre-Trip Apparent Power (kVA) Class 1 Notes 3,8 Last Trip Stator RTD Class 1 Note 3 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 72 Phase B Differential Current Class 2 Note 7 Phase C Differential Current Class 2 Note 7 Average Phase Current Class 2 Note 7 Generator Load (percent) Class 2 Negative Sequence Current Class 2 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 73 Note 8 Hottest Stator RTD Class 2 Note 3 Hottest Stator RTD Temperature (°C) Class 2 RTD #1 Temperature (°C) Class 2 RTD #2 Temperature (°C) Class 2 RTD #3 Temperature (°C) Class 2 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 74 Average Generator Load Class 2 Average Negative Sequence Current Class 2 Average Phase-Phase Voltage Class 2 User Map Value 1 Note 5 User Map Value 2 Note 5 ↓ ↓ …↓... ↓ ↓ 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 75 (kW and MW, for example). The user should select the unit which is closest to providing the resolution and range desired. If 32-bit analog input capability is present, the higher-resolution (kW, kvar, kVA) points should generally be used, since they provide the greatest resolution. 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 76 (volts and tenths of a volt). The user should select the unit which is closest to providing the resolution and range desired. If 32-bit analog input capability is present, the higher-resolution (tenths of a volt) points should generally be used, since they provide the greatest resolution. 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...
  • Page 77 DNP COMMUNICATIONS device profile document ..............56 DUAL SETPOINTS ................13 ELECTRICAL INTERFACE ..............1 ERROR RESPONSES ................10 EVENT RECORDER ................12 LOOPBACK TEST ................8 MEMORY MAP data formats ................. 42 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE CGI–1...
  • Page 78 ................ 6 MODBUS FUNCTIONS ................. 5 RS232 COMMUNICATIONS ..............1 RS485 COMMUNICATIONS ..............1 TIMING ................... 4 TRACE MEMORY ................12, 13 USER DEFINABLE MEMORY MAP ............11 WAVEFORM CAPTURE ................ 12 CGI–2 489 GENERATOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE...

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