GE 1601-0149-A2 User Manual

Title P

age

GE Industrial Systems

489

Generator Management Relay

COMMUNICATIONS GUIDE

Software Revision: 3.00

GE Publication Code: GEK-106495A

GE Multilin Part Number: 1601-0149-A2

GE Multilin

215 Anderson Avenue, Markham, Ontario

Canada L6E 1B3

Tel: (905) 294-6222 Fax: (905) 201-2098

Internet: http://www.GEindustrial.com/multilin

ISO9001:2000

GE Multilin's Quality Management

System is registered to

ISO9001:2000

QMI # 005094

UL # A3775

Tabl

e of Contents

Communications Guide

489

MODBUS PROTOCOL Electrical Interface.................................................................................................................................. 1

MODBUS FUNCTIONS Supported Functions ............................................................................................................................. 3

MODBUS MEMORY MAP Memory Map Information..................................................................................................................... 9

DNP PROTOCOL Device Profile Document..................................................................................................................... 46

DNP POINT LISTS Binary Input / Binary Input Change (Objects 01/02) .......................................................................... 49

Modbus RTU Description...................................................................................................................... 1

Data Frame Format and Data Rate ....................................................................................................... 1

Data Packet Format................................................................................................................................ 2

CRC-16 Algorithm .................................................................................................................................. 3

Timing..................................................................................................................................................... 3

Function Codes 03/04: Read Setpoints / Actual Values ...................................................................... 4

Function Code 05: Execute Operation.................................................................................................. 5

Function Code 06: Store Single Setpoint............................................................................................. 5

Function Code 07: Read Device Status ................................................................................................ 6

Function Code 08: Loopback Test......................................................................................................... 6

Function Code 16: Store Multiple Setpoints........................................................................................ 7

Function Code 16: Performing Commands ......................................................................................... 8

Error Responses..................................................................................................................................... 8

User-Definable Memory Map Area ...................................................................................................... 9

Event Recorder....................................................................................................................................... 9

Waveform Capture .............................................................................................................................. 10

Dual Setpoints...................................................................................................................................... 10

Passcode Operation............................................................................................................................. 10

489 Memory Map................................................................................................................................. 11

Memory Map Data Formats................................................................................................................ 40

Implementation Table ......................................................................................................................... 47

Default Variations ................................................................................................................................ 48

Binary / Control Relay Output Block (Objects 10/12)......................................................................... 51

Binary / Frozen Counter (Objects 20/21)............................................................................................. 52

Analog Input / Input Change (Objects 30/32).....................................................................................53

GE Multilin

http://www.GEindustrial.com/multilin

Communications Guide

Table of Contents489

http://www.GEindustrial.com/multilin

GE Multilin

Modbus Protocol

Communications Guide

489 Communications Guide

GE Publication Code: GEK-106495A GE Multilin Part Number: 1601-0149-A2

Modbus Protocol

Electrical Interface The hardware or electrical interface is one of the following: one of two 2-wire RS485

ports from the rear terminal connector or the RS232 from the front panel connector. In a 2-wire RS485 link, data flow is bidirectional. Data flow is half-duplex for both the RS485 and the RS232 ports. That is, data is never transmitted and received at the same time. RS485 lines should be connected in a daisy chain configuration (avoid star connections) with a terminating network installed at each end of the link, i.e. at the master end and at the slave farthest from the master. The terminating network should consist of a 120 Ω resistor in series with a 1 nF ceramic capacitor when used with Belden 9841 RS485 wire. The value of the terminating resistors should be equal to the characteristic impedance of the line. This is approximately 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.

489

Modbus RTU

Description

Data Frame Format and

Data Rate

GE Multilin

The 489 implements a subset of the AEG Modicon Modbus RTU serial communication standard. Many popular programmable controllers support this protocol directly with a suitable interface card allowing direct connection of relays. Although the Modbus protocol is hardware independent, the 489 interfaces include two 2-wire RS485 ports and one RS232 port. Modbus is a single master, multiple slave protocol suitable for a multi-drop configuration as provided by RS485 hardware. In this configuration up to 32 slaves can be daisy-chained together on a single communication channel.

The 489 is always a slave; it cannot be programmed as a master. Computers or PLCs are commonly programmed as masters. The Modbus protocol exists in two versions: Remote Terminal Unit (RTU, binary) and ASCII. Only the RTU version is supported by the 489. Monitoring, programming, and control functions are performed with read/write register commands.

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). The parity bit is optional as odd or even. If it is programmed as odd or even, the data frame consists of 1 start bit, 8 data bits, 1 parity bit, and 1 stop bit.

Modbus protocol can be implemented at any standard communication speed. The 489 RS485 ports support operation at 1200, 2400, 4800, 9600, and 19200 baud. The front panel RS232 baud rate is fixed at 9600 baud.

http://www.GEindustrial.com/multilin

Modbus Protocol489

Communications Guide

Data Packet Format A complete request/response sequence consists of the following bytes (transmitted

as separate data frames):

1. A Master Query Message consisting of: a 1-byte Slave Address, a 1-byte Func- tion Code, a variable number of Data Bytes depending on the Function Code, and a 2-byte CRC code.

2. A Slave Response Message consisting of: a 1-byte Slave Address, a 1-byte Function Code, a variable number of Data Bytes depending on the Function Code, and a 2-byte CRC code.

The terms Slave Address, Function Code, Data Bytes, and CRC are explained below:

• SLAVE ADDRESS: This is the first byte of every transmission. This byte represents the user-assigned address of the slave device that is to receive the message sent by the master. Each slave device must be assigned a unique address and only the addressed slave will respond to a transmission that starts with its address. In a master request transmission the Slave Address represents the address of the slave to which the request is being sent. In a slave response transmission the Slave Address represents the address of the slave that is sending the response. The RS232 port ignores the slave address, so it will respond regardless of the value in the message. Note: A master transmission with a Slave Address of 0 indicates a broadcast command. Broadcast commands can be used for specific functions.

• FUNCTION CODE: This is the second byte of every transmission. Modbus defines function codes of 1 to 127. The 489 implements some of these functions. In a master request transmission the Function Code tells the slave what action to perform. In a slave response transmission if the Function Code sent from the slave is the same as the Function Code sent from the master indicating the slave performed the function as requested. If the high order bit of the Function Code sent from the slave is a 1 (i.e. if the Function Code is greater than 127) then the slave did not perform the function as requested and is sending an error or exception response.

• DATA BYTES: This is a variable number of bytes depending on the Function Code. These may be actual values, setpoints, or addresses sent by the master to the slave or vice-versa. Data is sent MSByte first followed by the LSByte.

• CRC: This is a two byte error checking code. CRC is sent LSByte first followed by the MSByte. The RTU version of Modbus includes a two byte CRC-16 (16-bit cyclic redundancy check) with every transmission. The CRC-16 algorithm essentially treats the entire data stream (data bits only; start, stop and parity ignored) as one continuous binary number. This number is first shifted left 16 bits and then divided by a characteristic polynomial (11000000000000101B). The 16-bit remainder of the division is appended to the end of the transmission, LSByte first. The resulting message including CRC, when divided by the same polynomial at the receiver will give a zero remainder if no transmission errors have occurred.

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 indicates than one or more bytes of the transmission were received incorrectly and thus the entire transmission should be ignored in order to avoid the 489 performing any incorrect operation. The CRC-16 calculation is an industry standard method used for error detection. An algorithm is included here to assist programmers in situations where no standard CRC-16 calculation routines are available.

http://www.GEindustrial.com/multilin

GE Multilin

Modbus Functions

Communications Guide

CRC-16 Algorithm Once the following algorithm is complete, the working register “A” will contain the

CRC value to be transmitted. Note that this algorithm requires the characteristic polynomial to be reverse bit ordered. The MSbit of the characteristic polynomial is dropped since it does not affect the value of the remainder.

The symbols used in the algorithm are shown below:

--> data transfer

; A

low

CRC 16 bit CRC-16 result

i, j loop counters

(+) logical EXCLUSIVE-OR operator

N total number of data bytes

G 16 bit characteristic polynomial = 1010000000000001 (binary)

shr (x) right shift operator (the LSbit of x is shifted into a carry flag, a '0' is

The CRC algorithm is shown below:

1. FFFF (hex) --> A

2. 0 --> i

3. 0 --> j

4. D

(+) A

5. j + 1 --> j

6. shr (A)

7. Is there a carry? No: go to step 8.

8. Is j = 8? No: go to 5.; Yes: continue.

9. i + 1 --> i

10. Is i = N? No: go to 3.; Yes: continue.

11. A --> CRC

16-bit working register; low and high order bytes of A (the 16-bit

high

working register)

i-th data byte (i = 0 to N – 1)

with MSbit dropped and bit order reversed

shifted into the MSbit of x, all other bits are shifted right one location)

--> A

low

Yes: G (+) A --> A and continue.

489

Timing Data packet synchronization is maintained by timing constraints. The receiving

device must measure the time between the reception of characters. If three and one half character times elapse without a new character or completion of the packet, then the communication link must be reset (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.

Modbus Functions

Supported Functions The following functions are supported by the 489:

• Function Codes 03 and 04: Read Setpoints and Actual Values

• Function Code 05: Execute Operation

• Function Code 06: Store Single Setpoint

• Function Code 07: Read Device Status

• 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.

GE Multilin

http://www.GEindustrial.com/multilin

Communications Guide

Modbus Functions489

Function Codes 03/04:

Read Setpoints / Actual

Value s

Modbus implementation: Read Input and Holding Registers 489 Implementation: Read Setpoints and Actual Values

For the 489 Modbus implementation, these commands are used to read any setpoint (‘holding registers’) or actual value (‘input registers’). Holding and input registers are 16-bit (two byte) values transmitted high order byte first. Thus all 489 setpoints and actual values are sent as two bytes. The maximum of 125 registers can be read in one transmission. Function codes 03 and 04 are configured to read setpoints or actual values interchangeably since some PLCs do not support both function codes.

The slave response to these function codes is the slave address, function code, a count of the number of data bytes to follow, the data itself and the CRC. Each data item is sent as a two byte number with the high order byte sent first. The CRC is sent as a two byte number with the low order byte sent first.

Message Format and Example:

Request slave 11 to respond with 2 registers starting at address 0235. For this example, the register data in these addresses is:

Address Data

0235 0064

0236 000A

Master Transmission Bytes Example Description

Slave Address 1 0B message for slave 11

Function Code 1 03 read register values

Data Starting Address 2 02 32 data starting at 0235h

Number of Setpoints 2 00 02 2 registers = 4 bytes total

CRC (low, high) 2 D5 17 computed CRC error code

Slave Response Bytes Example Description

Slave Address 1 0B message from slave 11

Function Code 1 03 read register values

Byte Count 1 04 2 registers = 4 bytes total

Data #1 (high, low) 2 00 64 value in address 0235h

Data #2 (high, low) 2 00 0A value in address 0236h

CRC (low, high) 2 EB 91 computed CRC error code

http://www.GEindustrial.com/multilin

GE Multilin

Modbus Functions

Communications Guide

489

Function Code 05:

Execute Operation

Modbus Implementation: Force Single Coil 489 Implementation: Execute Operation

This function code allows the master to request specific 489 command operations. The command numbers listed in the Commands area of the memory map correspond to operation code for function code 05. The operation commands can also be initiated by writing to the Commands area of the memory map using function code 16. Refer to Section Function Code 16: Store Multiple Setpoints on page –7 for complete details.

Supported Operations:Reset 489 (operation code 1); Generator Start (operation code 2); Generator Stop (operation code 3); Waveform Trigger (operation code 4)

Message Format and Example:

Reset 489 (operation code 1).

Master Transmission Bytes Example Description

Slave Address 1 0B message for slave 11

Function Code 1 05 execute operation

Operation Code 2 00 01 reset command (op code 1)

Code Value 2 FF 00 perform function

CRC (low, high) 2 DD 50 computed CRC error code

Slave Response Bytes Example Description

Slave Address 1 0B message from slave 11

Function Code 1 05 execute operation

Operation Code 2 00 01 reset command (op code 1)

Code Value 2 FF 00 perform function

CRC (low, high) 2 DD 50 computed CRC error code

Function Code 06: Store

Single Setpoint

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.

Message Format and Example:

Request slave 11 to store the value 01F4 in Setpoint address 1180. After the transmission in this example is complete, Setpoints address 1180 will contain the value 01F4.

Master Transmission Bytes Example Description

Slave Address 1 0B message for slave 11

Function Code 1 06 store single setpoint

Data Starting Address 2 11 80 setpoint address 1180h

Data 2 01 F4 data for address 1180h

CRC (low, high) 2 8D A3 computed CRC error code

Slave Response Bytes Example Description

Slave Address 1 0B message from slave 11

Function Code 1 06 store single setpoint

Data Starting Address 2 11 80 setpoint address 1180h

Data 2 01 F4 data for address 1180h

CRC (low, high) 2 8D A3 computed CRC error code

GE Multilin

http://www.GEindustrial.com/multilin

Communications Guide

Modbus Functions489

Function Code 07: Read

Device Status

Modbus Implementation: Read Exception Status 489 Implementation: Read Device Status

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:

BIT DESCRIPTION BIT DESCRIPTION

B0 1 TRIP relay operated = 1 B4 5 ALARM relay operated = 1

B1 2 AUXILIARY relay operated = 1 B5 6 SERVICE relay operated = 1

B2 3 AUXILIARY relay operated = 1 B6 Stopped = 1

B3 4 AUXILIARY relay operated = 1 B7 Running = 1

Note that if status is neither stopped or running, the generator is starting.

Message Format and Example:

Request status from slave 11.

Master Transmission Bytes Example Description

Slave Address 1 0B message for slave 11

Function Code 1 07 read device status

CRC (low, high) 2 47 42 computed CRC error code

Slave Response Bytes Example Description

Slave Address 1 0B message from slave 11

Function Code 1 07 read device status

Device Status 1 59 status = 01011001b

CRC (low, high) 2 C2 08 computed CRC error code

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.

Master Transmission Bytes Example Description

Slave Address 1 0B message for slave 11

Function Code 1 08 loopback test

Diagnostic Code 2 00 00 must be 0000h

Data 2 00 00 must be 0000h

CRC (low, high) 2 E0 A1 computed CRC error code

Slave Response Bytes Example Description

Slave Address 1 0B message from slave 11

Function Code 1 08 loopback test

Diagnostic Code 2 00 00 must be 0000h

Data 2 00 00 must be 0000h

CRC (low, high) 2 E0 A1 computed CRC error code

http://www.GEindustrial.com/multilin

GE Multilin

Modbus Functions

Communications Guide

489

Function Code 16: Store

Multiple Setpoints

Modbus Implementation: Preset Multiple Registers 489 Implementation: Store Multiple Setpoints

This function code allows multiple Setpoints to be stored into the 489 memory. Modbus “registers” are 16-bit (two byte) values transmitted high order byte first. Thus all 489 setpoints are sent as two bytes. The maximum number of Setpoints that can be stored in one transmission is dependent on the slave device. Modbus allows up to a maximum of 60 holding registers to be stored. The 489 response to this function code is to echo the slave address, function code, starting address, the number of Setpoints stored, and the CRC.

Message Format and Example:

Request slave 11 to store the value 01F4 to Setpoint address 1180 and the value 0001 to setpoint address 1181. After the transmission in this example is complete, 489 slave 11 will have the following setpoints information stored:

Address Data

1180 01F4

1181 0001

Master Transmission Bytes Example Description

Slave Address 1 0B message for slave 11

Function Code 1 10 store setpoints

Data Starting Address 2 11 80 data starting at 1180h

Number of Setpoints 2 00 02 2 setpoints = 4 bytes total

Byte Count 1 04 2 registers = 4 bytes

Data 1 2 01 F4 data for address 1180h

Data 2 2 00 01 data for address 1181h

CRC (low, high) 2 9B 89 computed CRC error code

Slave Response Bytes Example Description

Slave Address 1 0B message from slave 11

Function Code 1 10 store multiple setpoints

Data Starting Address 2 11 80 data starting at 1180h

Number of Setpoints 2 00 02 2 setpoints (4 bytes total)

CRC (low, high) 2 45 B6 computed CRC error code

GE Multilin

http://www.GEindustrial.com/multilin

Communications Guide

Modbus Functions489

Function Code 16:

Performing Commands

Some PLCs may not support execution of commands using function code 5 but do support storing multiple setpoints using function code 16. To perform this operation using function code 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. The Command Operation register must then be written with a valid command operation number from the list of commands shown in the memory map. The Command Data registers must be written with valid data if the command operation requires data. The selected command will execute immediately upon receipt of a valid transmission.

Message Format and Example:

Perform a 489 RESET (operation code 1).

Master Transmission Bytes Example Description

Slave Address 1 0B message for slave 11

Function Code 1 10 store setpoints

Data Starting Address 2 00 80 setpoint address 0080h

Number of Setpoints 2 00 02 2 setpoints = 4 bytes total

Byte Count 1 04 2 registers = 4 bytes

Command Function 2 00 05 data for address 0080h

Command Function 2 00 01 data for address 0081h

CRC (low, high) 2 0B D6 computed CRC error code

Slave Response Bytes Example Description

Slave Address 1 0B message from slave 11

Function Code 1 10 store multiple setpoints

Data Starting Address 2 00 80 setpoint address 0080h

Number of Setpoints 2 00 02 2 setpoints (4 bytes total)

CRC (low, high) 2 40 8A computed CRC error code

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). The following byte will be an exception code indicating the type of error that

occurred.

Transmissions received from the master with CRC errors will be ignored by the 489.

The slave response to an error (other than CRC error) will be:

• SLAVE ADDRESS: 1 byte

• FUNCTION CODE: 1 byte (with MSbit set to 1)

•EXCEPTION CODE: 1 byte

•CRC: 2 bytes

The 489 implements the following exception response codes.

01: ILLEGAL FUNCTION

The function code transmitted is not one of the functions supported by the 489.

02: ILLEGAL DATA ADDRESS

The address referenced in the data field transmitted by the master is not an allowable address for the 489.

03: ILLEGAL DATA VALUE

The value referenced in the data field transmitted by the master is not within range for the selected data address.

http://www.GEindustrial.com/multilin

GE Multilin

Modbus Memory Map

Communications Guide

489

Modbus Memory Map

Memory Map

Information

NOTE

User-Definable

Memory Map Area

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. Addresses are listed in hexadecimal. Data values (Setpoint ranges, increments, and factory values) are in decimal.

Many Modbus communications drivers add 40001d to the actual address of the register addresses. For example: if address 0h was to be read, 40001d would be the address required by the Modbus communications driver; if address 320h (800d) was to be read, 40801d would be the address required by the Modbus communications driver.

The 489 contains a User Definable area in the memory map. This area allows remapping of the addresses of all Actual Values and Setpoints registers. The User Definable area has two sections:

1. A Register Index area (memory map addresses 0180h to 01FCh) that contains

125 Actual Values or Setpoints register addresses.

2. A Register area (memory map addresses 0100h to 017Ch) that contains the

data at the addresses in the Register Index.

Register data that is separated in the rest of the memory map may be remapped to adjacent register addresses in the User Definable Registers area. This is accomplished by writing to register addresses in the User Definable Register Index area. This allows for improved throughput of data and can eliminate the need for multiple read command sequences.

For example, if the values of Average Phase Current (register addresses 0412h and 0413h) and Hottest Stator RTD Temperature (register address 04A0h) are required to be read from an 489, their addresses may be remapped as follows:

1. Write 0412h to address 0180h (User Definable Register Index 0000) using func-

tion code 06 or 16.

2. Write 0413h to address 0181h (User Definable Register Index 0001) using func-

tion code 06 or 16. (Average Phase Current is a double register number)

3. Write 04A0h to address 0182h (User Definable Register Index 0001) using func-

tion code 06 or 16.

A read (function code 03 or 04) of registers 0100h (User Definable Register 0000) and 0101h (User Definable Register 0001) will return the Average Phase Current and register 0102h (User Definable Register 0002) will return the Hottest Stator RTD Temperature.

Event Recorder The 489 event recorder data starts at address 3000h. Address 3003h is the ID

number of the event of interest (a high number representing the latest event and a low number representing the oldest event). Event numbers start at zero each time the event record is cleared, and count upwards. To retrieve event 1, write ‘1’ to the Event Record Selector (3003h) and read the data from 3004h to 30E7h. To retrieve event 2, write ‘2’ to the Event Record Selector (3003h) and read the data from 3004h to 30E7h. All 40 events may be retrieved in this manner. The time and date stamp of each event may be used to ensure that all events have been retrieved in order without new events corrupting the sequence of events (event 0 should be less recent than event 1, event 1 should be less recent than event 2, etc.).

If more than 40 events have been recorded since the last time the event record was cleared, the earliest events will not be accessible. For example, if 100 events have been recorded (i.e., the total events since last clear in register 3002h is 100), events 60 through 99 may be retrieved. Writing any other value to the event record selector (register 3003h) will result in an “invalid data value” error.

GE Multilin

http://www.GEindustrial.com/multilin

Modbus Memory Map489

Communications Guide

Each communications port can individually select the ID number of the event of interest by writing address 3003h. This way the front port, rear port and auxiliary port can read different events from the event recorder simultaneously.

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. To access the waveform capture memory, select the channel of interest by writing the number to the Waveform Capture Channel Selector (30F5h). Then read the waveform capture data from address 3100h-31BFh, and read the date, time and line frequency from addresses 30F0h-30F4h.

Each communications port can individually select a Waveform Channel Selector of interest by writing address 30F5h. This way the front port, rear port and auxiliary port can read different Waveform Channels simultaneously.

The channel selector must be one of the following values:

VALUE SELECTED A/D SAMPLES SCALE FACTOR

0 Phase A line current 500 counts equals 1 × CT primary 1 Phase B line current 500 counts equals 1 × CT primary 2 Phase C line current 500 counts equals 1 × CT primary 3 Neutral-End phase A current 500 counts equals 1 × CT primary 4 Neutral-End phase B current 500 counts equals 1 × CT primary 5 Neutral-End phase C current 500 counts equals 1 × CT primary 6 Ground current 500 counts equals 1 × CT primary

7 Phase A to neutral voltage 2500 counts equals 120 secondary volts

8 Phase B to neutral voltage 2500 counts equals 120 secondary volts

9 Phase C to neutral voltage 2500 counts equals 120 secondary volts

or 1A for 50:0.025

Dual Setpoints Each communications port can individually select an Edit Setpoint Group of interest

by writing address 1342h. This way the front port, rear port and auxiliary port can read and alter different setpoints simultaneously.

Passcode Operation Each communications port can individually set the Passcode Access by writing

address 88h with the correct Passcode. This way the front port, rear port and auxiliary port have individual access to the setpoints. Reading address 0203h,

COMMUNICATIONS SETPOINT ACCESS register, provides the user with the current state

of access for the given port. A value of 1 read from this register indicates that the user has full access rights to changing setpoints from the given port.

http://www.GEindustrial.com/multilin

GE Multilin

Modbus Memory Map

Communications Guide

489 Memory Map The 489 memory map is shown in the following table.

Table 1: 489 Memory Map (Sheet 1 of 29)

ADDR NAME RANGE STEP UNITS FORMAT DEFAULT

PRODUCT ID

0000 GE Multilin Product Device Code N/A N/A N/A F1 32

0001 Product Hardware Revision 1 to 26 1 N/A F15 N/A

0002 Product Software Revision N/A N/A N/A F16 N/A

0003 Product Modification Number 0 to 999 1 N/A F1 N/A

0010 Boot Program Revision N/A N/A N/A F16 N/A

0011 Boot Program Modification Number 0 to 999 1 N/A F1 N/A

MODEL ID

0040 Order Code 0 to 16 1 N/A F22 N/A

0050 489 Revision 12 1 N/A F22 N/A

0060 489 Boot Revision 12 1 N/A F22 N/A

COMMANDS

0080 Command Function Code (always 5) 5 N/A N/A F1 N/A

0081 Command Operation Code 0 to 65535 1 N/A F1 N/A

0088 Communications Port Passcode 0 to 99999999 1 N/A F12 0

00F0 Time (Broadcast) N/A N/A N/A F24 N/A

00F2 Date (Broadcast) N/A N/A N/A F18 N/A

USER_MAP / USER MAP VALUES

0100 User Map Value #1 of 125... 5 N/A N/A F1 N/A

017C User Map Value #125 of 125 5 N/A N/A F1 N/A

USER_MAP / USER MAP ADDRESSES

0180 User Map Address #1 of 125... 0 to 3FFF 1 hex F1 0

01FC User Map Address #125 of 125 0 to 3FFF 1 hex F1 0

STATUS / GENERATOR STATUS

0200 Generator Status 0 to 4 1 – F133 1

0201 Generator Thermal Capacity Used 0 to 100 1 % F1 0

0202 Estimated Trip Time On Overload 0 to 65535

0203 Communications Setpoint Access 0 to 1 N/A N/A F126 N/A

STATUS / SYSTEM STATUS

0210 General Status 0 to 65535 1 N/A F140 0

0211 Output Relay Status 0 to 63 1 N/A F141 0

0212 Active Setpoint Group 0 to 1 1 N/A F118 0

STATUS / LAST TRIP DATA

0220 Cause of Last Trip 0 to 139 1 – F134 0

0221 Time of Last Trip N/A N/A N/A F19 N/A

0223 Date of Last Trip N/A N/A N/A F18 N/A

0225 Tachometer Pretrip 0 to 7200 1 RPM F1 0

0226 Phase A Pre-Trip Current 0 to 999999 1 Amps F12 0

0228 Phase B Pre-Trip Current 0 to 999999 1 Amps F12 0

022A Phase C Pre-Trip Current 0 to 999999 1 Amps F12 0

022C Phase A Pre-Trip Differential Current 0 to 999999 1 Amps F12 0

022E Phase B Pre-Trip Differential Current 0 to 999999 1 Amps F12 0

0230 Phase C Pre-Trip Differential Current 0 to 999999 1 Amps F12 0

0232 Negative Sequence Current Pretrip 0 to 2000 1 % FLA F1 0

0233 Ground Current Pretrip 0 to 20000000 1 A F14 0

0235 Pre-Trip A-B Voltage 0 to 50000 1 Volts F1 0

0236 Pre-Trip B-C Voltage 0 to 50000 1 Volts F1 0

0237 Pre-Trip C-A Voltage 0 to 50000 1 Volts F1 0

0238 Frequency Pretrip 0 to 12000 1 Hz F3 0

023B Real Power (MW) Pretrip –2000000 to 2000000 1 MW F13 0

1, 2, 3 See Table footnotes on page 39

1sF12 –1

489

GE Multilin

http://www.GEindustrial.com/multilin

Modbus Memory Map489

Communications Guide

Table 1: 489 Memory Map (Sheet 2 of 29)

ADDR NAME RANGE STEP UNITS FORMAT DEFAULT

023D Reactive Power Mvar Pretrip –2000000 to 2000000 1 Mvar F13 0

023F Apparent Power MVA Pretrip 0 to 2000000 1 MVA F13 0

0241 Last Trip Data Stator RTD 1 to 12 1 – F1 1

0242 Hottest Stator RTD Temperature –50 to 250 1 °C F4 0

0243 Last Trip Data Bearing RTD 1 to 12 1 – F1 1

0244 Hottest Bearing RTD Temperature –50 to 250 1 °C F4 0

0245 Last Trip Data Other RTD 1 to 12 1 – F1 1

0246 Hottest Other RTD Temperature –50 to 250 1 °C F4 0

0247 Last Trip Data Ambient RTD 1 to 12 1 – F1 1

0248 Hottest Ambient RTD Temperature –50 to 250 1 °C F4 0

0249 Analog Input 1 Pretrip –50000 to 50000 1 Units F12 0

024B Analog Input 2 Pretrip –50000 to 50000 1 Units F12 0

024D Analog Input 3 Pretrip –50000 to 50000 1 Units F12 0

024F Analog Input 4 Pretrip –50000 to 50000 1 Units F12 0

025C Hottest Stator RTD Temperature –50 to 250 1 °F F4 0

025D Hottest Bearing RTD Temperature –50 to 250 1 °F F4 0

025E Hottest Other RTD Temperature –50 to 250 1 °F F4 0

025F Hottest Ambient RTD Temperature –50 to 250 1 °F F4 0

0260 Neutral Voltage Fundamental Pretrip 0 to 250000 1 Volts F10 0

0262 Neutral Voltage 3rd Harmonic Pretrip 0 to 250000 1 Volts F10 0

0264 Pre-Trip Vab/Iab 0 to 65535 1 ohms s F2 0

0265 Pre-Trip Vab/Iab Angle 0 to 359 1 ° F1 0

STATUS / TRIP PICKUPS

0280 Input A Pickup 0 to 4 1 – F123 0

0281 Input B Pickup 0 to 4 1 – F123 0

0282 Input C Pickup 0 to 4 1 – F123 0

0283 Input D Pickup 0 to 4 1 – F123 0

0284 Input E Pickup 0 to 4 1 – F123 0

0285 Input F Pickup 0 to 4 1 – F123 0

0286 Input G Pickup 0 to 4 1 – F123 0

0287 Sequential Trip Pickup 0 to 4 1 – F123 0

0288 Field-Breaker Discrepancy Pickup 0 to 4 1 – F123 0

0289 Tachometer Pickup 0 to 4 1 – F123 0

028A Offline Overcurrent Pickup 0 to 4 1 – F123 0

028B Inadvertent Energization Pickup 0 to 4 1 – F123 0

028C Phase Overcurrent Pickup 0 to 4 1 – F123 0

028D Negative Sequence Overcurrent Pickup 0 to 4 1 – F123 0

028E Ground Overcurrent Pickup 0 to 4 1 – F123 0

028F Phase Differential Pickup 0 to 4 1 – F123 0

0290 Undervoltage Pickup 0 to 4 1 – F123 0

0291 Overvoltage Pickup 0 to 4 1 – F123 0

0292 Volts/Hertz Pickup 0 to 4 1 – F123 0

0293 Phase Reversal Pickup 0 to 4 1 – F123 0

0294 Underfrequency Pickup 0 to 4 1 – F123 0

0295 Overfrequency Pickup 0 to 4 1 – F123 0

0296 Neutral Overvoltage (Fundamental) Pickup 0 to 4 1 – F123 0

0297 Neutral Undervoltage (3rd Harmonic) Pickup 0 to 4 1 – F123 0

0298 Reactive Power Pickup 0 to 4 1 – F123 0

0299 Reverse Power Pickup 0 to 4 1 – F123 0

029A Low Forward Power Pickup 0 to 4 1 – F123 0

029B Thermal Model Pickup 0 to 4 1 – F123 0

029C RTD #1 Pickup 0 to 4 1 – F123 0

029D RTD #2 Pickup 0 to 4 1 – F123 0

1, 2, 3 See Table footnotes on page 39

http://www.GEindustrial.com/multilin

GE Multilin

Modbus Memory Map

Communications Guide

Table 1: 489 Memory Map (Sheet 3 of 29)

ADDR NAME RANGE STEP UNITS FORMAT DEFAULT

029E RTD #3 Pickup 0 to 4 1 – F123 0

029F RTD #4 Pickup 0 to 4 1 – F123 0

02A0 RTD #5 Pickup 0 to 4 1 – F123 0

02A1 RTD #6 Pickup 0 to 4 1 – F123 0

02A2 RTD #7 Pickup 0 to 4 1 – F123 0

02A3 RTD #8 Pickup 0 to 4 1 – F123 0

02A4 RTD #9 Pickup 0 to 4 1 – F123 0

02A5 RTD #10 Pickup 0 to 4 1 – F123 0

02A6 RTD #11 Pickup 0 to 4 1 – F123 0

02A7 RTD #12 Pickup 0 to 4 1 – F123 0

02A8 Analog Input 1 Pickup 0 to 4 1 – F123 0

02A9 Analog Input 2 Pickup 0 to 4 1 – F123 0

02AA Analog Input 3 Pickup 0 to 4 1 – F123 0

02AB Analog Input 4 Pickup 0 to 4 1 – F123 0

02AC Loss Of Excitation 1 Pickup 0 to 4 1 – F123 0

02AD Loss Of Excitation 2 Pickup 0 to 4 1 – F123 0

02AE Ground Directional Pickup 0 to 4 1 – F123 0

02AF High-Set Phase Overcurrent Pickup 0 to 4 1 – F123 0

02B0 Distance Zone 1 Pickup 0 to 4 1 – F123 0

02B1 Distance Zone 2 Pickup 0 to 4 1 – F123 0

STATUS / ALARM PICKUPS

0300 Input A Pickup 0 to 4 1 – F123 0

0301 Input B Pickup 0 to 4 1 – F123 0

0302 Input C Pickup 0 to 4 1 – F123 0

0303 Input D Pickup 0 to 4 1 – F123 0

0304 Input E Pickup 0 to 4 1 – F123 0

0305 Input F Pickup 0 to 4 1 – F123 0

0306 Input G Pickup 0 to 4 1 – F123 0

0307 Tachometer Pickup 0 to 4 1 – F123 0

0308 Overcurrent Pickup 0 to 4 1 – F123 0

0309 Negative Sequence Overcurrent Pickup 0 to 4 1 – F123 0

030A Ground Overcurrent Pickup 0 to 4 1 – F123 0

030B Undervoltage Pickup 0 to 4 1 – F123 0

030C Overvoltage Pickup 0 to 4 1 – F123 0

030D Volts/Hertz Pickup 0 to 4 1 – F123 0

030E Underfrequency Pickup 0 to 4 1 – F123 0

030F Overfrequency Pickup 0 to 4 1 – F123 0

0310 Neutral Overvoltage (Fundamental) Pickup 0 to 4 1 – F123 0

0311 Neutral Undervoltage (3rd harmonic) Pickup 0 to 4 1 – F123 0

0312 Reactive Power Pickup 0 to 4 1 – F123 0

0313 Reverse Power Pickup 0 to 4 1 – F123 0

0314 Low Forward Power Pickup 0 to 4 1 – F123 0

0315 RTD #1 Pickup 0 to 4 1 – F123 0

0316 RTD #2 Pickup 0 to 4 1 – F123 0

0317 RTD #3 Pickup 0 to 4 1 – F123 0

0318 RTD #4 Pickup 0 to 4 1 – F123 0

0319 RTD #5 Pickup 0 to 4 1 – F123 0

031A RTD #6 Pickup 0 to 4 1 – F123 0

031B RTD #7 Pickup 0 to 4 1 – F123 0

031C RTD #8 Pickup 0 to 4 1 – F123 0

031D RTD #9 Pickup 0 to 4 1 – F123 0

031E RTD #10 Pickup 0 to 4 1 – F123 0

031F RTD #11 Pickup 0 to 4 1 – F123 0

1, 2, 3 See Table footnotes on page 39

489

GE Multilin

http://www.GEindustrial.com/multilin

Modbus Memory Map489

Communications Guide

Table 1: 489 Memory Map (Sheet 4 of 29)

ADDR NAME RANGE STEP UNITS FORMAT DEFAULT

0320 RTD #12 Pickup 0 to 4 1 – F123 0

0321 Open Sensor Pickup 0 to 4 1 – F123 0

0322 Short/Low Temperature Pickup 0 to 4 1 – F123 0

0323 Thermal Model Pickup 0 to 4 1 – F123 0

0324 Trip Counter Pickup 0 to 4 1 – F123 0

0325 Breaker Failure Pickup 0 to 4 1 – F123 0

0326 Trip Coil Monitor Pickup 0 to 4 1 – F123 0

0327 VT Fuse Failure Pickup 0 to 4 1 – F123 0

0328 Current Demand Pickup 0 to 4 1 – F123 0

0329 MW Demand Pickup 0 to 4 1 – F123 0

032A Mvar Demand Pickup 0 to 4 1 – F123 0

032B MVA Demand Pickup 0 to 4 1 – F123 0

032C Analog Input 1 Pickup 0 to 4 1 – F123 0

032D Analog Input 2 Pickup 0 to 4 1 – F123 0

032E Analog Input 3 Pickup 0 to 4 1 – F123 0

032F Analog Input 4 Pickup 0 to 4 1 – F123 0

0330 Not Programmed Pickup 0 to 4 1 – F123 0

0331 Simulation Mode Pickup 0 to 4 1 – F123 0

0332 Output Relays Forced Pickup 0 to 4 1 – F123 0

0333 Analog Output Forced Pickup 0 to 4 1 – F123 0

0334 Test Switch Shorted Pickup 0 to 4 1 – F123 0

0335 Ground Directional Pickup 0 to 4 1 – F123 0

0336 IRIG-B Alarm Pickup 0 to 4 1 – F123 0

0337 Generator Running Hour Pickup 0 to 4 1 – F123 0

STATUS / DIGITAL INPUTS

0380 Access Switch State 0 to 1 1 – F207 0

0381 Breaker Status Switch State 0 to 1 1 – F207 0

0382 Assignable Digital Input 1 State 0 to 1 1 – F207 0

0383 Assignable Digital Input 2 State 0 to 1 1 – F207 0

0384 Assignable Digital Input 3 State 0 to 1 1 – F207 0

0385 Assignable Digital Input 4 State 0 to 1 1 – F207 0

0386 Assignable Digital Input 5 State 0 to 1 1 – F207 0

0387 Assignable Digital Input 6 State 0 to 1 1 – F207 0

0388 Assignable Digital Input 7 State 0 to 1 1 – F207 0

0389 Trip Coil Supervision 0 to 1 1 – F132 0

STATUS / REAL TIME CLOCK

03FC Date (Read-only) N/A N/A N/A F18 N/A

03FE Time (Read-only) N/A N/A N/A F19 N/A

METERING DATA / CURRENT METERING

0400 Phase A Output Current 0 to 999999 1 Amps F12 0

0402 Phase B Output Current 0 to 999999 1 Amps F12 0

0404 Phase C Output Current 0 to 999999 1 Amps F12 0

0406 Phase A Neutral-Side Current 0 to 999999 1 Amps F12 0

0408 Phase B Neutral-Side Current 0 to 999999 1 Amps F12 0

040A Phase C Neutral-Side Current 0 to 999999 1 Amps F12 0

040C Phase A Differential Current 0 to 999999 1 Amps F12 0

040E Phase B Differential Current 0 to 999999 1 Amps F12 0

0410 Phase C Differential Current 0 to 999999 1 Amps F12 0

0412 Average Phase Current 0 to 999999 1 Amps F12 0

0414 Generator Load 0 to 2000 1 % FLA F1 0

0415 Negative Sequence Current 0 to 2000 1 % FLA F1 0

0416 Ground Current 0 to 10000 1 Amps F14 0

0420 Phase A Current Angle 0 to 359 1 ° F1 0

1, 2, 3 See Table footnotes on page 39

http://www.GEindustrial.com/multilin

GE Multilin

Modbus Memory Map

Communications Guide

Table 1: 489 Memory Map (Sheet 5 of 29)

ADDR NAME RANGE STEP UNITS FORMAT DEFAULT

0421 Phase B Current Angle 0 to 359 1 ° F1 0

0422 Phase C Current Angle 0 to 359 1 ° F1 0

0423 Phase A Neutral-Side Angle 0 to 359 1 ° F1 0

0424 Phase B Neutral-Side Angle 0 to 359 1 ° F1 0

0425 Phase C Neutral-Side Angle 0 to 359 1 ° F1 0

0426 Phase A Differential Angle 0 to 359 1 ° F1 0

0427 Phase B Differential Angle 0 to 359 1 ° F1 0

0428 Phase C Differential Angle 0 to 359 1 ° F1 0

0429 Ground Current Angle 0 to 359 1 ° F1 0

METERING DATA / VOLTAGE METERING

0440 Phase A-B Voltage 0 to 50000 1 Volts F1 0

0441 Phase B-C Voltage 0 to 50000 1 Volts F1 0

0442 Phase C-A Voltage 0 to 50000 1 Volts F1 0

0443 Average Line Voltage 0 to 50000 1 Volts F1 0

0444 Phase A-N Voltage 0 to 50000 1 Volts F1 0

0445 Phase B-N Voltage 0 to 50000 1 Volts F1 0

0446 Phase C-N Voltage 0 to 50000 1 Volts F1 0

0447 Average Phase Voltage 0 to 50000 1 Volts F1 0

0448 Per Unit Measurement Of V/Hz

0449 Frequency 500 to 9000 1 Hz F3 0

044A Neutral Voltage Fund 0 to 250000 1 Volts F10 0

044C Neutral Voltage 3rd Harmonic 0 to 250000 1 Volts F10 0

044E Neutral Voltage Vp3 3rd Harmonic 0 to 250000 1 Volts F10 0

0450 Vab/Iab 0 to 65535 1 ohms F2 0

0451 Vab/Iab Angle 0 to 359 1 ° F1 0

0460 Line A-B Voltage Angle 0 to 359 1 ° F1 0

0461 Line B-C Voltage Angle 0 to 359 1 ° F1 0

0462 Line C-A Voltage Angle 0 to 359 1 ° F1 0

0463 Phase A-N Voltage Angle 0 to 359 1 ° F1 0

0464 Phase B-N Voltage Angle 0 to 359 1 ° F1 0

0465 Phase C-N Voltage Angle 0 to 359 1 ° F1 0

0466 Neutral Voltage Angle 0 to 359 1 – F1 0

METERING DATA / POWER METERING

0480 Power Factor –100 to 100 1 – F6 0

0481 Real Power –2000000 to 2000000 1 MW F13 0

0483 Reactive Power –2000000 to 2000000 1 Mvar F13 0

0485 Apparent Power –2000000 to 200000 1 MVA F13 0

0487 Positive Watthours 0 to 4000000000 1 MWh F13 0

0489 Positive Varhours 0 to 4000000000 1 Mvarh F13 0

048B Negative Varhours 0 to 4000000000 1 Mvarh F13 0

METERING DATA / TEMPERATURE

04A0 Hottest Stator RTD 1 to 12 1 – F1 0

04A1 Hottest Stator RTD Temperature –52 to 250 1 °C F4 –52

04A2 RTD #1 Temperature –52 to 251 1 °C F4 –52

04A3 RTD #2 Temperature –52 to 251 1 °C F4 –52

04A4 RTD #3 Temperature –52 to 251 1 °C F4 –52

04A5 RTD #4 Temperature –52 to 251 1 °C F4 –52

04A6 RTD #5 Temperature –52 to 251 1 °C F4 –52

04A7 RTD #6 Temperature –52 to 251 1 °C F4 –52

04A8 RTD #7 Temperature –52 to 251 1 °C F4 –52

04A9 RTD #8 Temperature –52 to 251 1 °C F4 –52

04AA RTD #9 Temperature –52 to 251 1 °C F4 –52

04AB RTD #10 Temperature –52 to 251 1 °C F4 –52

1, 2, 3 See Table footnotes on page 39

0 to 200 1 – F3 0

489

GE Multilin

http://www.GEindustrial.com/multilin

+ 43 hidden pages