ABB REF601 CEI User Manual And Technical Description
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ABB REF601 CEI User Manual And Technical Description

ABB REF601 CEI User Manual And Technical Description

Feeder protection relay
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User's manual and Technical description
Feeder Protection Relay
REF601 CEI

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Summary of Contents for ABB REF601 CEI

  • Page 1 User’s manual and Technical description Feeder Protection Relay REF601 CEI...
  • Page 2 Document ID: 1MDU07205-YN Issued: 30.09.2010 Revision:F Product version:1.0 SP1 Copyright 2009 – ABB. All rights reserved...
  • Page 3 Trademarks ABB is a registered trademark of ABB Group. All other brand or product names mentioned in this document may be trademarks or registered trademarks of their respective holders.
  • Page 4 This document has been carefully checked by ABB but deviations cannot be completely ruled out. In case any errors are detected, the reader is kindly requested to notify the manufac- turer.
  • Page 5 (Low-voltage directive 2006/95/ EC). This conformity is the result of a test conducted by ABB in accordance with Article 10 of the directive in agreement with the product standards EN 50263 and EN 60255-26 for the EMC directive, and with the product standards EN 60255-6 and EN 60255-27 for the low voltage directive.

  • Page 6: Table Of Contents

    1MDU07205-YN rev. F Table of contents Introduction…………………………………...………9 Section 1 This manual..……………………..………………………...9 Intended audience.………………………………..……………9 Document Revison History...…………………………………..9 Document symbol & conventions..………………………….10 Section 2 REF601 CEI overview..…………………...……11 Overview....………….………………………..…………...11 Product version history….……………………………..………12 Operational functionality...……………………………………..12 Basic Functions......……………….…………….12 Power supply....………………………….……………15 Technical data ...……………………………...……17 Section 3 Dimensions..…….………………….…………………………..17 Power supply..……..……………………………..………...
  • Page 7 Breaker control & Trip Command Operation..……….…27 Signal Diagram........…………….…..…30 Protection characteristics.........……………32 Section 5 Menu structures & LHMI navigation……..34 Local HMI..…………...…………………..……………..……34 Navigation..…………………………..………….………….…36 Main Menu....……...…………..………..…………….…37 Authorization..…………………….………………………….38 Measurement............…..…..….39 Recorded data.............………….40 Events..............…..……..41 Settings................43 Confi guration..............47 Test..................51 Test - Calibration..............52 Functional Test..............61 Access Level.............…..……..63 Version info.................64 REF601 CEI User’s manual...
  • Page 8 Relay mounting dimension..………..….………………….…67 Relay connection digram............69 Bonding of sensor cable shield...........70 Relay ordering information....……………..……73 Section 7 Serial communication.....……………74 Modbus protocol overview....……………..……74 Wiring......…..……………..………….………….…74 Modbus RTU message format..........75 Modbus RTU function codes..…………………………….…77 Exception response..………………..….………………….…84 Serial communication parameters..….………………….…87 Communication troubleshooting.........95 REF601 CEI User’s manual...

  • Page 9: Introduction

    The manual contains terms and expressions commonly used to describe this kind of equipment. Document Revision History Document version Release date Document history 17.03.2009 Document released 17.04.2009 Document released 21.04.2009 Document released 25.05.2009 Document released 07.08.2009 Document released 30.09.2010 Document released REF601 CEI User’s manual...

  • Page 10: Document Symbol & Conventions

    Three-phase non-directional overcurrent, high-set 3I>> 50 / 51 stage Three-phase non-directional overcurrent, very high- 3I>>> 50 / 51 set stage Non-directional earth-fault, low-set stage Io> Non-directional earth-fault, high-set stage Io>> 50N/51N Three phase transformer inrush detector 3I2f> REF601 CEI User’s manual...

  • Page 11: Ref601 Cei Overview

    REF601 CEI overview 1MDU07205-YN rev. F Section 2 REF601 CEI overview Overview REF601 is a dedicated feeder protection relay, intended for the protection, measure- ment and supervision of utility substations and industrial power systems. Engineered from the ground up, the relay is inspired by and is compatible with the Rogowski coil sensor for current measurement.

  • Page 12: Product Version History

    REF601 CEI overview 1MDU07205-YN rev. F Product version history Product version Release date Product history 20.03.2009 Product released 1.0 SP1 21.08.2009 Service Pack released Operational Functionality 2.3.1 Standard confi guration S 2.3.1 Standard confi guration The IED is available with one standard confi guration. The table indicates...
  • Page 13 1MDU07205-YN rev. F REF601 CEI overview If an internal fault disappears, the green Ready LED starts glowing and the IED returns to the normal service state. The fault indication message remains on the LCD until manually cleared. The self-supervision signal output operates on the closed circuit principle. Under normal conditions the relay is energized and the contact gap 5-6 in connector XK2 is closed.
  • Page 14 I R F 0 0 8 voltage check Power ON EEPROM I R F 0 1 6 check fault Runtime EEPROM I R F 0 3 2 check fault I R F 0 6 4 Gain check fault REF601 CEI User’s manual...

  • Page 15: Power Supply

    The power supply board is having universal 24-240V AC / DC input voltage range. It is galvanically isolated switch mode power supply. It is implemented using fl y-back topology where output voltages (+12V and -15V) are obtained using an isolation transformer. The output voltages are sensed through optical isolation REF601 CEI User’s manual...
  • Page 16 Unit is able to accept a wide voltage range as following: Description Range Tolérance Frequency Insulation Input Voltage 24…240Vdc 70%…+120% Galvanic, 2kV Power 24…240Vac 85%…+110% 50Hz * Ripple up to 12% has to be acceptable to the unit. REF601 CEI User’s manual...

  • Page 17: Technical Data

    Burden at rated current < 0.1 VA at 1A Linear current measuring 0.025 x In - 12.5 x In range Thermal withstand capability: • Continuously • For 1 s 100 A Dynamic current withstand: • Half-wave value 250 A REF601 CEI User’s manual...

  • Page 18: Binary Input

    Make and carry 0.5 s 10 A at 24V DC Breaking capacity when the control-circuit time 4 A/0.15 A constant L/R<40 ms at 30 / 220 V DC Minimum contact load 100 mA at 24 V AC / DC REF601 CEI User’s manual...

  • Page 19: Protection Functions

    Defi nite time Operate time t >>> 0.05...0.2 sec in steps of 0.05 Accuracy of pick-up current ± 10% of set value Accuracy of operate time ± 5% of set value or ± 30 msec Reset ratio 0.98 REF601 CEI User’s manual...

  • Page 20: Degree Of Protection

    The automatic swicthing of measurement modes, allows a wide dynamic measurement range of 1 : 500 . Transformer inrush detection Inrush threshold value 0.2...20 x In Ratio Setting 30%...50% Degree of protection of fl ush-mounted relay IP 42 Front side Sides with connection terminal IP 20 REF601 CEI User’s manual...

  • Page 21: Environmental Tests And Conditions

    Peak displac. (f<fco): 0.075mm Peak accel. (f>fco): 1gn No. of sweep cycles in each axis: 1 Vibration endurance test IEC 60255-21-1 Class 2: 10 to 150Hz freq range, Constant acceleration: 2 gn No. sweep cycles in each axis: 20 REF601 CEI User’s manual...

  • Page 22: Mechanical Tests

    Conducted Immunity and Power unit tests Electrostatic Discharge IEC 60255-22-2 Level 3, 5/30ns pulse, 5 discharges: ±6kVp contact ±8kVp air Fast Low Energy Tran- IEC 60255-22-4 5/50ns pulse, 2.5 kHz, ±4kVp, sient (EFT) (Including functional earth port) REF601 CEI User’s manual...
  • Page 23 Spot freq: 80, 160, 450, 900MHz, AM 80% @1kHz Radio-Frequency Elec- IEC 60255-22-3 Level 4, 900 ± 5MHz, PWM 100% @ tromagnetic Field 200Hz, 50% D.C.: - 10V/m (10s Dwell from digital radio time) telephones(Pulse Modul.) REF601 CEI User’s manual...
  • Page 24 Product safety Complies with the LV directive 2006/95/EC Standards EN 60255-27 (2005), EN 60255-6 (1994) RoHS compliance Complies with the RoHS directive 2002/95/EC Data communication ( optional ) Protocol : Modbus RTU Communication port : RS485 4-wire REF601 CEI User’s manual...

  • Page 25: Protection Functions

    (XK2.3 –XK2.4) will also be activated for user as Trip indication. Earth Fault Protection 4.2.1 Functionality The earth-fault function is used as non-directional earth-fault protection for feeders. The function starts and operates when the set current exceeds the set limit. REF601 CEI User’s manual...

  • Page 26: Three Phase Inrush Detector

    fl ows for a short period during switch on. The REF601 employs the most proven technique of blocking based on measured value of second harmonic content to make the protection immune to magnetizing inrush. REF601 CEI User’s manual...

  • Page 27: Output & Inputs

    -Through “UP” + “Enter” key combination In case of power off without reset command, at next power-on, trip signaling we get restored. In case of power OFF condition and Internal relay fault condition, trip contact will be in open condition. REF601 CEI User’s manual...
  • Page 28 “breaker close” output (XK2.7 – XK2.8) i.e. contacts becomes close for 200mSec. The difference between Remote opening command and Breaker open is that Re- mote opening function can be blocked, moreover when remote opening is activated the message “Remote Trip Activated” is displayed on the LCD. REF601 CEI User’s manual...
  • Page 29 & either breaker open or close will be inhibited or will not function. While rest all actions can be performed. Otherwise, in case relay is in default screen mode then all above mentioned action in table can be performed. REF601 CEI User’s manual...

  • Page 30: Signal Diagram

    Close command Fig. 6 – Signal diagram of relay REF601 Analogue input: o L1, L2, L3 Energizing sensor input for phase L1, L2, L3 o Io Earth current input 1A through CBCT for external earth measurement REF601 CEI User’s manual...
  • Page 31 NC , when healthy Breaker close command is received. The signaling contacts can be reset to normal default conditions by proper reset command. Reset command can be given by push buttons or by binary input or through communication interface. REF601 CEI User’s manual...

  • Page 32: Protection Characteristics

    I/I> Very Inverse 2.34E 1.26E 1.01E 1.00E Note: E stands for accuracy class i.e. in this case it is 5 for phase and external earth fault whereas for internal earth fault the accuracy class is 7.5 REF601 CEI User’s manual...
  • Page 33 20In while earth measurement is limited up to 12.5In. So corresponding I / Isat get limited depending upon maximum measurement limits. Minimum trip time for IDMT curve is 50ms. Fig. 7 – Very inverse-time characteristics of relay REF601 REF601 CEI User’s manual...

  • Page 34: Menu Structures & Lhmi Navigation

    Local HMI Fig. 8 – Local HMI of relay REF601 The local HMI of the relay contains following elements: . LCD display . Navigation buttons . LED indicators The LHMI is used for setting, monitoring and controlling. REF601 CEI User’s manual...

  • Page 35: Navigation

    Used for discarding changed parameter value in edit mode, or for going back to main menu from any level of menu navigation. Breaker Close Control key for providing Breaker Close command. Breaker Open Control key for providing Breaker Open command. REF601 CEI User’s manual...
  • Page 36 Main Menu. After time-out the default view is activated displaying all the phase and earth currents. Figure 10 shows the main menu of the relay. REF601 CEI User’s manual...

  • Page 37: Main Menu

    C o n f i g u r a t i o n T e s t A c c e s s L e v e l V e r s i o n I n f o Fig. 10 - Main menu of relay REF601 REF601 CEI User’s manual...

  • Page 38: Authorization

    Sr. No. Feature User Level Level User Level Password editing Relay confi guration editing COM Board parameter editing Protection settings editing Menu Viewing other than Back Admin / Password key comibation Up + Back +Down setting password REF601 CEI User’s manual...

  • Page 39: Measurement

    X X X X X . X X A m P I 3 : X X X X X . X X A m p I o : X X . X X Fig. 13- Measurement menu view with primary current REF601 CEI User’s manual...

  • Page 40: Recorded Data

    C o u n t e r Fig. 15- Recorded data menu with its sub menu B l o c k R e c o r d e d C u r r e n t B l o c k REF601 CEI User’s manual...

  • Page 41: Events

    (IRF) status, phase protection trip status and earth protection trip status which is shown in following fi gure. ‘Event 1’ will always contain data for the most recent event and ‘Event 2’ previous trip event and so on. REF601 CEI User’s manual...
  • Page 42 B r k r O p n : Y Y Y O / P B r k r C l d : Y Y Y Note: = "YES" or "NO " Y Y Y Fig.18- Event sub menu view REF601 CEI User’s manual...

  • Page 43: Settings

    Time value can be changed from 0.05 to 1 sec in steps of 0.05. • For “High Set Io>>”, Isat value range is 0.25 to 12.5 In in steps of 0.25 and Time value can be changed from 0.05 to 0.2 sec in steps of 0.05. REF601 CEI User’s manual...
  • Page 44 S e t I > : X X . X X T i m e : X X . X X s e c Fig. 20-Setting menu with its sub menu protection stage Low-set over current REF601 CEI User’s manual...
  • Page 45 S e t I o > : X X . X X T i m e : X X . X X s e c Fig. 23- Setting menu with its sub menu protection stage Low-set earth-fault REF601 CEI User’s manual...
  • Page 46 P a r a m e t e r s P a r i t y : X X X X N o n e O d d E v e n Fig. 25- Setting menu with sub menu communication setting (optional feature) REF601 CEI User’s manual...

  • Page 47: Confi Guration

    P r o t e c t i o n R e s e t y y y Y e s S e n s o r C o n t a n t Fig. 26- Confi guration menu with sub menu REF601 CEI User’s manual...
  • Page 48 Y e s B l o c k i n g R e m o t e C t r l : Y Y Y Y e s Fig. 27- Confi guration sub menu protection blocking REF601 CEI User’s manual...
  • Page 49 : X X X X I n r u s h : X X . X X 0 0 . 2 0 2 0 . 0 0 Fig. 29- Confi guration sub menu Inrush with settings REF601 CEI User’s manual...
  • Page 50 This is displayed only once when user presses any key when in default screen mode if settings gets changed before that, either by user through menu navigation, by communication module or by Confi guration Tool. REF601 CEI User’s manual...

  • Page 51: Test

    O u t p u t : Y Y Y Y e s T e s t F u n c t i o n a l T e s t Fig. 32 Test menu with sub menu REF601 CEI User’s manual...

  • Page 52: Test - Calibration

    D o n e C a l i b F a u l t f o r I n 8 0 f o r I n 8 0 Fig. 33- Test sub menu calibration with display REF601 CEI User’s manual...
  • Page 53 C a l i b F a u l t f o r I n 1 2 5 0 f o r I n 1 2 5 0 Fig. 33-Test sub menu calibration with display ( contd. ) REF601 CEI User’s manual...
  • Page 54 For binary input tests, timeout between one test to another binary input test is 10 sec. And during binary output test each output will toggle for 100msec ON & 100 msec OFF Each test procedure provides test result messages and interactive user selections on LCD. REF601 CEI User’s manual...
  • Page 55 BACK key timesout T e s t F a i l e d T e s t S u c c e s s f u l Repeat Test Fig.34- Hardware Test menu with its display view. REF601 CEI User’s manual...
  • Page 56 DOWN key or timesout T e s t F a i l e d T e s t S u c c e s s f u l Fig.34- Hardware Test menu with its display view (contd.) REF601 CEI User’s manual...
  • Page 57 BO key pressed or timesout T e s t F a i l e d T e s t S u c c e s s f u l Fig.34- Hardware Test menu with its display view (contd.) REF601 CEI User’s manual...
  • Page 58 T e s t F a i l e d T e s t S u c c e s s f u l Fig.34- Hardware Test menu with its display view (contd.) REF601 CEI User’s manual...
  • Page 59 T e s t F a i l e d T e s t S u c c e s s f u l Fig.34- Hardware Test menu with its display view (contd.) REF601 CEI User’s manual...
  • Page 60 R e p e a t ? Y E S : U P N O : D O W N if user selects NO if user selects YES or timesout Start Exit Fig.34- Hardware Test menu with its display view (contd.) REF601 CEI User’s manual...

  • Page 61: Functional Test

    : Y Y Y Y e s F u n c t i o n a l T e s t S G 1 7 : Y Y Y Y e s Fig.35- Functional test with its display view REF601 CEI User’s manual...
  • Page 62 I>> = 0.2 In t0>> = 0.2 sec t>> = 0.05 sec I0>> = 2.0 In I>> = 2.1 In t0>> = 0.1 sec t>> = 0.3 sec I>> = 4.2 In t>> = 0.5 sec REF601 CEI User’s manual...

  • Page 63: Access Level

    L e v e l P a s s w o r d : X X X Key 1 when user enters first key Key 2 when user enters second key Fig.37- Access Level Sub Menu with its display view REF601 CEI User’s manual...

  • Page 64: Version Info

    1250 T r i p C i r c u i t x x x x x x x x x x x x x Normally Open For CEI 0-16, only"250" available Fig.38– Version Info Display REF601 CEI User’s manual...

  • Page 65: Installation

    Check the relay for transport damages. If the product has been damaged, a claim should be made to the transport contractor and the local representative of ABB should be promptly notifi ed. Compare the type designation of the product with the ordering information to verify that you have received the right product.

  • Page 66: Checking Environmental Conditions And Mounting Space

    • Breaker mounting The space requirement of mounting: Overall dimensions (H x W x D) : 160 x 130 x 101 mm Cutout dimensions (H x W) : 151.5 x 121.5 mm Weight : 1.2 kg REF601 CEI User’s manual...

  • Page 67: Relay Wiring

    - 0.2 - 2.5 sq. mm fi nely stranded Relay mounting dimensions The over all dimensions of the relay are as follows: 4,25 24,8 121,5 91,6 Bottom 89,25 3,75 Left Front Fig. 39– Relay mounting dimensions with Flush (Panel) mounting REF601 CEI User’s manual...
  • Page 68 The relay also have breaker mounting version. The details of the same are indicated in Figure 37: 24,8 121,5 Mounting plate Bottom Left Front SEE DETAIL SECTION DETAIL SCALE Cross Recessed Pan head Screws M4X10 Plain Washer,Normal Series M4 Fig. 40 – Relay mounting dimensions with Breaker mounting REF601 CEI User’s manual...

  • Page 69: Relay Connection Digram

    BI : Remote Control Unit BI : Remote Reset Ready Bkr. Close BI : Breaker Close Trip2 BI : Breaker Open XK10 Communication on Modbus RTU Protocol (Optional) Trip1 SHIELD Fig. 41 – Connection diagram for relay REF601 REF601 CEI User’s manual...

  • Page 70: Bonding Of Sensor Cable Shield

    This shall result in a short and big area connection of the sensor cable shield to the chassis resp. GND • The braid shall have a similar construction as shown on image below Fig. - Braid for 3 Sensor Cable REF601 CEI User’s manual...
  • Page 71 This shall result in a short and big area connection of the sensor cable shield to the chassis resp. GND • The braid shall have a similar or equivalent construction as shown on image (ring type) Fig. - Bottom view of sensor REF601 CEI User’s manual...
  • Page 72 A coupling path between cables for I/O , Power Supply and the cables for voltage indicator should be avoided. • A typical segregation of 40cm shall be considered Move Right to Segregate VI Cables I/O Signals REF601 CEI User’s manual...

  • Page 73: Relay Ordering Information

    Code Fig. Figure 42 – Ordering details of relay REF601 Specifi c sensors needs to be used along with the relays. The ordering details for the same can be available from sensor data sheet no. 1YMA583791R0001-4. REF601 CEI User’s manual...

  • Page 74: Serial Communication

    MODBUS Master RS485 / RS232 Convertor Tx+ Tx- Rx+ Rx- G 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 REF601 REF601 REF601 Fig. 43– Connection details for MODBUS RTU communication REF601 CEI User’s manual...

  • Page 75: Modbus Rtu Message Format

    Partial messages must be detected and errors must be set as a result. In RTU mode, message frames are separated by a silent interval of at least 3.5 character times this time interval is called t3,5. REF601 CEI User’s manual...
  • Page 76 fi eld in the message. When this is done, the low–order byte of the fi eld is appended fi rst, followed by the high–order byte. The CRC high–order byte is the last byte to be sent in the message. REF601 CEI User’s manual...

  • Page 77: Modbus Rtu Function Codes

    Read Module Read baud rate, parity and relay settings address settings. Table 2 : Maximum number of resistors allowable per request Function Code Maximum number of resistors REF601 CEI User’s manual...
  • Page 78 The same function code is also used to read the relay confi guration parameters. The address range to read the confi guration parameters is 0x20 – 0x26, and maximum number of registers is 7. The mapping of address to confi guration parameter read is shown in table 5 REF601 CEI User’s manual...
  • Page 79 The register mapping of data log is shown in table - 6, event log is explained in table – 7, 8, 9, and register mapping for current measurement is shown in Table 10. REF601 CEI User’s manual...
  • Page 80 Function Address Address value value Address Code High High Example: Change the breaker close output Response message format for function code 0x05 Output Output Output Output Slave Function Address Address value value Address Code High High REF601 CEI User’s manual...
  • Page 81 Example: Write 0Ah value to resistor value with address 0x0005 on slave at add. 01 Response message format for function code 06 Starting Starting Setting Setting Slave Function Address Address value value Address Code High high 0 Ah REF601 CEI User’s manual...
  • Page 82 This function code is used to read the settings of the module. The following sub- function codes are supported. Sub-function Code Description Read the module address Read the communication settings – Baud rate Read the communication settings – Parity REF601 CEI User’s manual...
  • Page 83 Sub-function 03: Read parity This sub-function code is used to read the operating parity of the MODBUS communication. The Baud rate setting mapping is as shown in table 13 and Parity settings is as shown in table 14. REF601 CEI User’s manual...

  • Page 84: Exception Response

    81h in the starting fi eld indicates that the frame is for exception frame and exception code 01h indicates that the requested function code is not implemented in the slave device. The various exception codes are listed in table 15 REF601 CEI User’s manual...
  • Page 85 0x0004 0.05 (1-2.75) (1-2.75) set I >> Isat 2-9 (0.1- Phase High 1 (0.05) 0x0005 0.05 (0.1-0.45) 0.45) set I >> Time Phase Very 4-30 4-30 2 (1) 0x0006 Highset I >>> (2-15) (2-15) Isat 0x0007 REF601 CEI User’s manual...
  • Page 86 Io >> Isat Earth High 0-15 0-15 1 (0.05) 0x000D set Io >> 0.05 (0-0.75) (0-0.75) Time 2-200 2-200 Inrush current 1 (0.1) 0x000E 0.10 (0.2-20) (0.2-20) threshold 30-50 30-50 5(5) 0x000F Inrush ratio (30-50) (30-50) REF601 CEI User’s manual...

  • Page 87: Serial Communication Parameters

    5-250(0.25 - Earth Highset 0x000C 0.05 5(0.25) 12.5) Io>> Isat Earth Highset 0x000D 1-4(0.05 - 0.2) 0.05 1 (0.05) Io>> Time Inrush 0x000E 2-200 (0.2 -20) Current 1(0.1) Threshold 0x000F 30 -50 (30-50) Inrush ratio 5(5) REF601 CEI User’s manual...
  • Page 88 Data samples 02 to 05 0080 - 0095 0x0050 - 0x005F Data samples 06 to 09 0096 - 0111 0x0060 - 0x006F Data samples 10 to 13 0112 - 0119 0x0070 - 0x0077 Data samples 14 to 15 REF601 CEI User’s manual...
  • Page 89 Current I0 of 3rd sample 0012 0x000C Current I1 of 4th sample 0013 0x000D Current I2 of 4th sample Data log of 4th sample 0014 0x000E Current I3 of 4th sample 0015 0x000F Current I0 of 4th sample REF601 CEI User’s manual...
  • Page 90 Event Word for I3 Event 4 0x0112 Event Word for I0 0x0113 Port Status 0x0114 Event Word for I1 0x0115 Event Word for I2 0x0116 Event Word for I3 Event 5 0x0117 Event Word for I0 0x0118 Port Status REF601 CEI User’s manual...
  • Page 91 Port Status as per table 9 The port status is a 2 byte fi eld where bit positions 0 – 7 form the byte 1 and bit position 8-9 forms byte 2. Byte 1: Byte 2: REF601 CEI User’s manual...
  • Page 92 0515 0x0203 0 - 65535 0-0xFFFF Current measurement on Io Table 11: Digital output channel to address mapping Address Data log mapping 0x00 Breaker open 0x01 Breaker close 0x02 Reset protection command 0x03 Remote trip command REF601 CEI User’s manual...
  • Page 93 Nominal current 0250A Table 13: Baud rate mapping Baud Rate response value Description 2400 baud 4800 baud 9600 baud 19200 baud 38400 baud Table 14: Parity mapping Parity response value Description None parity Odd parity Even parity REF601 CEI User’s manual...
  • Page 94 Data Value remainder of a complex request, such as that the implied length is incorrect. Memory The slave attempted to read record fi le but 0x08 Parity detected a parity error in the memory. Error REF601 CEI User’s manual...

  • Page 95: Communication Troubleshooting

    Is the function code supported by the device? • Has the request a valid address? • Has the request a valid quantity of coils, inputs, and registers? • Is the power supply turned on for the relay unit? REF601 CEI User’s manual...
  • Page 96 ABB Ltd. Distribution Automation Maneja Works, Vadodara - 390 013, India Phone +91 265 2604386 +91 265 2638922 www.abb.com/substationautomation Copyright 2009- ABB...

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