type a elr20 / elr30 type b differential relays series …...differential relays series elr type a...
TRANSCRIPT
User handbook
DIFFERENTIAL RELAYS SERIES ELR
type A ELR20 / ELR30
type B ELR21 / ELR31
version 02.0x
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Société Française d’Etudes et de Réalisations Electroniques
Tél. : 04 78 16 04 04 - Fax. : 04 78 16 04 05Tel. Intern. : 33 4 78 16 04 04 - Fax Intern. : 33 4 78 16 04 05
Siège : Route de Brindas - Parc d’Activité d’Arbora - N°269510 SOUCIEU EN JARREST - FRANCE
http: //www.sfere-net.come-mail: [email protected]
p1
Summary Summary1 . INTRODUCTION p2
2 . FUNCTIONS p2
3 . FEATURES p2
4 . SPACE REQUIREMENTS p3
5 . CONNECTINGS p3
6 . PROGRAMMING p5
6.1 Communication with the instrument p5 6.2 Orientation through the programming p6 6.3 Main menu p6 6.4 Programming menu p6 6.5 Reading of the configuration p15
7 . GENERAL WARRANTY TERMS p17
8 . ANNEXE DIFFERENTIAL EARTH LEAKAGE TRANSFORMERS p18
9 . ANNEXE MODBUS p20
9.1 Table of the Modbus addresses p20 9.2 Description of the born Modbus functions p21 9.3 Reading in double integer format p22 9.4 CRC16 calculation algorythm p22
p2
1. INTRODUCTIONThe differential relays of the serie ELR are relays for the limitation of the earth leakage current: Of type A (measurement of pure alternating differential current (AC) or current with a pulsed continuous component) for the ELR20 and 30 Of type B (for currents identical to the type A, but also for differential sinusoidal currents up to 1000Hz, for differential sinusoidal or continuous pulsed currents, superim-posed to a pure continuous current) for the ELR21 and 31.Associated with a measure earth leakage transformer (of type TcA for the ELR20 or 30 and TcB for the ELR21 or 31) and a circuit breaker, they allow to perform on low voltage networks of the type TT, IT, TNS the following functions:
- protection from indirect contacts,- additional protection from direct contats,- limitation of the current leak,- protection from fires.
Their reinforced immunity as well as theirTRMS measurement technique garantee a maximum safety and a continuity of the electrical operation, avoiding ill-timed cuts. They include in addition a pre-alarm output, allowing the anticipation of insulation defaults without causing a trip.
2. FUNCTIONS
3. FEATURESPower supply Universal: from 20 to 270Vac and 20 to 300Vdc Power draw: 2W max or 4VA ELR20 or ELR30 4W max or 7VA ELR21 or ELR31
Insulation: 2kV-50Hz-1min (between supply and outputs)
Setting of the sensitiveness (I∆n) : 0.030 - 0.1 - 0.2 - 0.3 - 0.5 - 1 - 2 - 3ASetting of the initial network frequency: 50 or 60 Hz (and DC ELR21 and 31)Setting of the triggering:
Alarm: 50% - 60% - 70% - 80% of I∆nPre-alarm: 30% - 50% - 60% - 70% - 80% of I∆n
Setting of the time delay:Alarm: Mode general (instant) - Selective mode - Lapse: 0.02 - 0.1 - 0.2 - 0.3 - 0.4 - 0.5 - 0.75 - 1 - 2 - 5 - 10 sec.Pre-alarm: Lapse: 0.02 - 0.1 - 0.2 - 0.3 - 0.4 - 0.5 - 0.75 - 1 - 2 - 5 - 10 sec.
Setting of the hysteresis:Pre-alarm: 0% - 5% - 10% - 15% - 20% of I∆n
Alarm outputs: one NO contact per alarm, 8A/250Vac on resistive load
External control: potential free contact
Option: digital output RS485, protocole Modbus/Jbus EIA RS485Operating temperature: -5 to +55°CStorage temperature: -20 to +70°CDimensions: 26.5x80x13 mmMounting: on DIN railConnection: plug-off connector for screwed connectionProtection indice: housing and terminals IP20Standards: IEC 61008-1, IEC 60755
CodingType A
Option : N digital RS 485
ELR20 or ELR30 N
- LCD display allowing:• The permanent display of the instant leak current as well as the value of the tripping current.• The visualisation of the status of the alarms.• The configuration of the instrument.
- Programmable sensitiveness: 30mA to 3A (8 calibers)
- 2 relay outputs:Relay 1:Main output (Alarm)
• Tripping setpoint programmable (50 to 80% of I∆n)• Positive or negative safety (programmable)• 3 time delay modes: general (instant), selective or programmable lapse from 20ms to 10s.
Relay 2 :Pre-alarm output
• Tripping setpoint programmable (30 to 80% of I∆n)• Positive or negative safety (programmable)• Hysteresis programmable from 0 to 20%• Time delay programmable from 20ms to 10s.• Recording function.
or end of reclosing cycle contact *
*
* ELR30 and ELR31 only Type B
Option : N digital RS 485
ELR21 or ELR31 N
- Test and reset of the alarms by keyboard keys or external control.- Test of the connection with the earth leakage transformer.- Protection of the configuration by code.- function self-reclosing with programming of the number of reclosings (20 max.) Programming of the time between each reclosing (from 1 to 9999 sec.) and programming of the cycle reinitialisation time (from 1 to 9999 sec.)*
*
* definition according to IEC60755
p3
26.5 mm
Upper connectorsA3A2A1E2E1T2T1
S6S5S4S3S2S1N2N1
131
100
80
Lower connectors
4. SPACE REQUIREMENTS
Dimensions : 26.5 x 80 x 131 mmHousing: self-extinguishing case of black UL 94VO ABSMounting in switchbox: latching on symmetrical DIN rail. Plug-off connectors for screwed connections (2.5mm², flexible or rigid and 1.5mm² flexible or rigid for the terminals T1 to T6 and E1 E2 on ELR21 and 31)Protection: Case / terminals: IP 20
Operating temperature: -5 to 55°CStorage temperature: -20 to 70°C
5. CONNECTINGS
Installation and mounting
The instrument can be connected with hazardous electrical voltages.It must be mounted, connected and implemented respecting the current regulations, by a qualified technician.This product is only a part of a protection system, which includes other elements (the earth leakage transformer, the circuit breaker etc....).It is necessary after the installation and recommended periodically to perform a test of the correct operation of the system.
U p p e r c o n n e c t o r s
SUPPLY EXTERNAL CONTROL
A3 A1
AC ~ ~DC + -
A2 E2 E1
T2 T1
Test /external reset
Earth lea-kage trans-former TCAxx
For the ELR21 or 31 use preferably a connection cable reference CBBXX (see the annexe EARTH LEAKAGE TRANSFORMER).Otherwise take care to make the shortest possible connection between the diffe-rential relay and the earth leakage transformer.Use preferably twisted cables, or even shielded cables in the case of a very disturbed environment, and connect the shielding on each side to the terminals T2 for the ELR20 or 30 and T5 for the ELR21 or 31.
L o w e r c o n n e c t o r s
S6 S5 S4 S3 S2 S1pre-alarm or end of reclosing cycle contact
Alarm
N2 N1
AB(ELR30 or ELR31 only)
Upper connectorsA3A2A1E2E1T6............T1
S6S5S4S3S2S1N2N1
131
100
80
Lower connectors
ELR20 and 30 ELR21 and 31
(if option digital output)
T1T2
T6 - - - - T1
T6T1
T1 → T1T2 → T2---T6 → T6
EARTH LEAKAGE TRANSFORMER
OUTPUTS
Earth leakage transformer TCBxx
(coils of the relays not supplied)
p4
For triggering by emission of voltage
For triggering by lack of voltage
LOAD
L1 L2 L3 N
A3 A1 E2 E1 E.L.T. connection
S1S2S3S4S5S6
Pre-alarm witness light
Earth leakage transformer
Test reset
E.L
.T. l
ink
Note:- The earth leakage transformer must be crossed in the same direction by all the active cables of the line, including the neutral (if it is present).- All the cables must be at the center of the earth leakage transformer.- The earth cable should not go through the earth leakage transformer.
EXAMPLES OF WIRING DIAGRAMS
M
L1 L2 L3
A3 A1 E2 E1
S1S2S3S4S5S6
Pre-alarm witness light
Earth leakage transformer
Test reset
N
E.L.T. connection
E.L.
T. li
nk
M
L1 L2 L3
A3 A1 E2 E1
S1S2S3S4S5S6
Pre-alarm witness light
Earth leakage transformer
Test reset
N
E.L.T. connection
E.L.
T. li
nk
3 ~
p5
6. PROGRAMMING
6.1 Communication with the instrument
I : 5mAInst
I∆n :30mA
■ )) ■21 ●
Value of the program-med sensitiveness (1)
Alarm indicator
Alarm indication:1: alarm latched2: pre-alarm latched
Test key:Mode measure : setting in test position(launching of the alarms)Mode configuration:allows to move through the menus or increase the enterings
Reset key:Mode measure: reset of the alarmsMode configuration: allows to move through the menus or decrease the enterings
Display of the instant leak current or the latching cur-rent (2)
Type of time delay:Inst: mode general or instantS : Selective modeXXmS: value of the pro-grammed time delay (2)
Activity indicator
Indicator of digital communi-cation
Menu key for access to the configuration
Key validation for validation of menu and entering.Allows to access in mode measure to the value of the max. measured current (see p. 16)
(1) For the ELR30 and 31 the sensitiveness value is displayed alternating with the reclosing mode Auto R or Manu R(2) For the ELR30 and 31 in the case of the awaiting of an automatic reclosing the current and the type of time delay will appear alternating with the n° of the next reclosing and the time remai-ning before that reclosing.
Several functions can be accessed from the measure display
Reset of the alarms
Access to the max. measured current value page 16
Access to the main menu page 6MTest of the alarms
M+ Access to the menu parametering of the earth leakage transformer page 17
Reading convention: Move through the main menu Revert to the previous menu Blinking display: awaiting validation or setting Alternating information display
Entering of a parameter: First start by increasing or decreasing the 1st digit and the sign: from -9 to +9. The 2nd from 0 to 9.
The 3rd from 0 to 9.
The 4th from 0 to 9. And then the decimal point if it needs to be entered.
and6888658865286520
«
Between each entering, validate the cipher with
65.20
M
+
+
Choice of the reclosing mode (ELR30) page 16
Display of the counter of the total of reclosings (ELR30) page 16
p6
6.2 Orientation through the programmingThe dialogue is ensured by 4 keys located on the front face.
Note: In mode programming, the instrument will automatically revert to the measure with the previous configuration if no key is pressed during 1min.In mode programming, the instrument will carry on measuring and managing its outputs with the old configuration.
MExit from a sub-menu to access the next menu / access to the programming exit menu
Move through the menus: downwards, or decrease the value shown
Move through the menus: upwards, or increase the value shown
Validation of the displayed parameter, or access to a submenu
6.3 Main menu
Mode rea-ding of the
configuration(see p15)
If code correct, access to the programming
menu (see right-hand
column)
If code incorrect, message appears
READ PROG
CODE
NO
8 888
« «
«
Programming of the access code
(see p16)
PCODE«
scrolling of the menus
vertical move
Entering of the access code.The access to the programming menu is protected by a 4-cipher code. The code is 0000 on factory exit (to change the code see p.16)
6.4 Programming menu
FREQ
Alarm
Pre.AL
J.BUS
Setting of the sensitiveness p7
Setting of the frequency p7
Configuration menu of the main alarm p8
Configuration menu of the pre-alarm p10
Configuration menu of the digital output p14(if option)
Access to the programming exit menu with or p14without saving of the configuration
Note: ⇒ In mode programming, the instrument will automatically revert to the measu-re with the previous configuration if no key is pressed during 1min.
I∆n
MNote: Press to go on to the next menu Move through the menus / choice
EXIT
ELR20 or 21
FREQ
Alarm
REL2
J.BUS
Setting of the sensitiveness p7
Setting of the frequency p7
Configuration menu of the main alarm p8
Configuration menu of the pre-alarm p10
Configuration menu of the automatic reclosing p12
Configuration menu of the digital output p14(if option)
Access to the programming exit menu with or p14without saving of the configuration
I∆n
EXIT
ELR30 or 31
Auto.R
Upwards move / increase
Validation / vertical moveDownwards move / decrease
Menu exit / accessM
p7
I∆nProgramming of the sensitiveness
I∆n
FREQ
« « « « « « « «
30mA 100mA 200mA 300mA 500mA 1A 2A 3A
Programming of the initial network frequency FREQ
FREQ
Alarm
« «
50 Hz 60 Hz ELR 20 and 30
FREQ
Alarm
« «ELR 21 and 31
«DC 50 Hz 60 Hz
p8
Programming of the main alarm Alarm
Alarm
SECU
DELAY
«
«
«
« «
« « « «
INSTA
«
SELEC
« «
Pre.AL
«
NEG.S POS.S
SpT.50% 60% 70% 80%
TIME*
* possible only if I∆n > 30mA
« « « « « « « « « « «
20ms 100ms 200ms 300ms 400ms 500ms 750ms 1 SEC 2 SEC 5 SEC 10 SEC* * * * * * * * * *
Programming of the type of time delay for the switching into alarm
Choice of the triggering value (% of I∆n)
Choice of the safety mode:NEG.S: the relay coil is supplied in alarm positionPOS.S: the relay coil is not supplied in alarm position
p9
InsTA
SELEC
TIME
:
:
:
Mode instant or general
Selective mode
fixed time delay
} In these 2 modes the time delay varies according to the pro-grammed sensitiveness and the measured leak current (see the table 1 from the standard IEC 610008-1)
table 1
Maximum operating time and minimum no response time according to the measured alternating current (RMS value).
Type I∆n (A) I∆n 2I∆n 5I∆n 500Ageneral or instant
any value0.3s 0.15s 0.04s 0.04s
Maximumoperating time
selective > 0.03 A0.5s 0.2s 0.15s 0.15s
0.13s 0.06s 0.05s 0.04sMinimum no response time
p10
Programming of the pre-alarm Pre.ALPre.AL
SECU
«
NEG.S
«
POS.S
«
Hyst.
«
0%
«
5%
«
10%
«
15%
«
20%
«DELAY
«
TIME
«
MEMO
«
YES
«
no
«
J.BUS EXITOR
if option
« « « « « « « « « « «
20ms 100ms 200ms 300ms 400ms 500ms 750ms 1 SEC 2 SEC 5 SEC 10 SEC
Programming of the type of time delay for the switching into alarm
recording of the pre-alarm, or not
Choice of the safety mode:NEG.S: the relay coil is supplied in alarm positionPOS.S: the relay coil is not supplied in alarm position
SPT.
«
«
50%
«
60%
«
70%
«
80%
«
Choice of the triggering setpoint (% of I∆n)
Choice of the hysteresis value (% de I∆n)
Out of alarm
alarm
spt.spt. -Hyst
OFF
«
30%
ELR20 or 21
p11
Programming of the Relais 2 REL2
Pre.AL
SECU
«
NEG.S
«
POS.S
«
Hyst.
«0%
«
5%«
10%«
15%«
20%«
DELAY
«
TIME
«
MEMO
«
YES
«
no
«
Auto.R EXITOR
« « « « « « « « « ««
20ms 100ms 200ms 300ms 400ms 500ms 750ms 1 SEC 2 SEC 5 SEC 10 SEC
Programming of the type of time delay for the switching into alarm
recording of the pre-alarm, or not
Choice of the safety mode:NEG.S: the relay coil is supplied in alarm positionPOS.S: the relay coil is not supplied in alarm position
SPT.
«
«
50%
«
60%
«
70%
«
80%
«
Choice of the triggering setpoint (% of I∆n)
Choice of the hysteresis value (% of I∆n)
Out of alarm
alarm
spt.spt. -Hyst
OFF
«
30%
ELR30 or 31
End C Relay 2 in pre-alarm output
Mode
REL2
Relay 2 in end of automatic reclosing cycle contact
p12
T.R1
Auto.R
J.BUS EXITOR
Programming of the automatic reclosing Auto.R
ON OFFMode
8888
«RAZ C.
8888
«NB
8888
«
8888
«T.Rxx
choice of the reclosing mode: ON: automatic OFF: manual
Programming of the reinitialisation time (in se-conds) of the automatic reclosing cycle in case the error disappears
Number of automatic reclosings in the cycle
Programming of the time (in seconds) between each reclosingxx: number of reclosings (NB)}
if option
ELR30 or 31
p13
Note:
I : XXmAInst
I∆n :30mA
I : XXmAInst
Auto R
I : XXmAInst
Manu R
or
)
When an error surges the relay will send an opening commande to the circuit breaker. After the programmed time «T.R1» the relay will then send a closing command to the circuit breaker.It will thus perform as many attempts as the number programmed in the variable «NB» (max. 20 times). If all the attempts fail the relay will remain open, until a manual reset, a keyboard or remote reset (external control or digital data link).Once the reset is performed the automatic reclosing cycle will start.Note: A reset performed during the reclosing cycle will let the cycle start again. The relay 2 can be programmed to trip at the end of the cycle (Mode => End C.).
If after a reclosing no error appears during the time programmed in the variable «RAZ C.» the cycle will reinitialise itself and start again from 0 at the next error.
To stop the automatic reclosing function set the mode on OFF. You will then switch to a manual reclosing. A quick access to the changing of mode (without going through the programming) is possible, see p16The current type of mode is indicated alternating with the value of the assigned current.
I : XXmAInst
I∆n :30mA
Rx inYYYS
Auto R
) Reclosing n°X in YYY seconds
Note: During the awaiting of the next reclosing the value of the remaining time as well as the number of the reclosing will appear alternating with the value of the default current and the type of time lapse.
Circuitbreakerclosed
Circuitbreakeropen
Operating of the automatic reclosing function
Error
Reclosing n°1
Error Error Error
Reclosing n°2 Reclosing n°«NB»
End of cycleReclosing possible only in manual
T.R1 T.R2 T.R«NB»
p14
Communication parametersslave number
must be between 1 and 255
transmission speed
«
SLAVE «
-8888 JBUS
time delay before any reply
NO: typical time lapse 10ms
«
YES
«
NO
Option digital output
JBUS
See also the features of the digi-tal data link p18
«
DELAY
«
PARIT «
EVEN
«
NONE
«
ODD
«
FORM «
L-H
«
H-L
Transmission rank of the bytes of an integer H-L: MSB of the integer transmit-ted firstL-H: LSB of the integer transmit-ted first
Choice of the parity NONEEVENODD
EXIT
YES: typical time lapse 75ms
SAVE
EXITNOYES
Exit from the programming with or without saving
exit and save the configura-tion
exit without saving the configuration
revertto the measure display
EXIT
«
2400
«
4800
«
9600
«
19.2K
«
38.4K
«
57.6K
«
115.2K
«
1200
«
BAUD
Upwards move / increase
Validation / vertical moveDownwards move / decrease
Menu exit / accessM
p15
INFOELR
20N
PROG
xxxx
ORIG
xx.xx
CSUM
PC-x
65F2
Validation / vertical move
name of the instrument
(1)- : standard versionN : digital output
Submenu
type of the instrument
options of the instrument
identification number of the instrument
programme version number
origin of the instrument
check sum of the programme
no
READ
I∆nFREQAlarmPre.AL
Reading of the sensitiveness
Reading of the frequency
Reading of the main alarm configuration Reading of the pre-alarm configuration Reading of the digital data link configuration (if option) Reading of the instrument internal parameters
Validation / vertical move
J.BUS
INFO
READ6.5 Reading of the configuration
ELR20 or 21
READ
I∆nFREQAlarmREL2
Reading of the sensitiveness
Reading of the frequency
Reading of the main alarm configuration Reading of the pre-alarm configuration
Configuration menu of the automatic reclosing Reading of the digital data link configuration (if option) Reading of the instrument internal parameters
Validation / vertical move
J.BUS
INFO
ELR30 or 31
Auto.R
In each reading submenu, use the keys and to move, and to visualise the parameters.
If no key is pressed during 20 s. the instrument will revert to the measure display. During the reading of the programming, the instrument will carry on measuring and managing its outputs.
p16
Programming of a new access code
Reminder: If no key is pressed during 1 min, the instrument will revert to the measure display. On factory exit the access code is 0000.
PCOD OLDNO
Enter pre-vious code
if code not valid(old)
display during 2s. and revert to the measure display
New code registered, and revert to the measure display
if code correct(old)
Enter the new code
NEW
Visualisation of the max. measured current value
Mode measure
I: max
▼I: xxmA
alternating display
maximum value
CLR.M
M
if you press the maximum recorded value will be deleted, and revert to the mode measure
Note: the max. value will not be recorded in case of power supply cut.
Changing of reclosing mode (ELR30 or 31 only)
Mode measure
Auto.R
+
ON OFFMode
automaticreclosing
Modemanual
reclosing
A counter of the total number of reclosings is increased at each auto-matic triggering.Note: This counter will not be saved in case of power supply cut.
Visualisation of the total number of reclosings (ELR30 or 31 only)
Mode measure
Tot.R
+M
XXXX
alternating display
number of automaticreclosings
Cl.Tot
M
p17
Saturation of the input
Mode measure
Menu parametering of the earth leakage transformer (ELR20 and 30 only)
code
«
M +
enter the code
access to the menu by simultaneous pressing of M +
RAP.TI
8 888
«
RPt.TI
ON OFF
SAVE
YES NO
*
* Caution: the programming of a wrong ratio would provoque a false measure
saving of the earth leakage transformer parameters, or not
detection of earth leakage transformer connection rupture: ON or OFF
enter the earth leakage transformer ratio500 ≤ Ratio ≤ 1000
RPt.TI
ON : The ELR20 will permanently detect the presence of the earth leakage transformer.If the connection with the earth leakage transformer is cut it will trigger the main alarm and show the message OPEN
OFF: No detection of the earth leakage transformer presence
Error messages
Rupture of the connection with the earth leakage transformer
Configuration memory error
Programming error (incoherent programming parameter)
Calibration error
OPENEr.FLAER.01ER.08
Note: If the instrument detects one of these 4 errors it will trig-ger the main alarm and show the corresponding message.
7. GENERAL WARRANTY TERMSWARRANTY applying and durationThis instrument is under warranty for a duration of 1 year against any design or manufacturing defects, under normal operating conditions. Processing conditions *: The processing not under warranty will be submit-ted to the acceptance of a repair estimate. The customer will return the pro-ducts at his charge, and they will be restored to him after processing. Without a written agreement on the repair estimate within 30 days, the products will not be held.
* Complete warranty terms and details available on request.
OvL
p18
8. ANNEXE 1: EARTH LEAKAGE TRANSFORMER
Differential earth leakage transformersTCA for type A relay: ELR20 or ELR30TCB for type B relay: ELR21 or ELR31
Recommendations for use:The earth leakage transformer must be crossed in the same direction by all the active cables of the line, including the neutral (if present).Do not let the earth cable go through the earth leakage transformer.Maintain the cables at the center of the earth leakage transformer.
no yes
PE NL1L2L3
They perform the algebraic sum of the currents inside the active leads (phase and neutral), thus allowing the detec-tion of any leak current even in the case of a very low value.
They are foreseen for wall mounting, but can also be mounted on DIN rail thanks to specific provided fastenings.
Take care to make the shortest possible connection between the differential relay and the earth leakage transformer.Use preferably twisted cables, or even shielded cables in the case of a very disturbed environment, and connect the shielding on both sides to the termi-nals T2 for the ELR20 or 30 and terminals T5 for the ELR21 or 31.
Connection
Relay ELR20 or 30
T1T2
T1T2
TCB earth leakage transformer
For the connection of the ELR21 or 31 to the earth leakage transformer of type TCB you can also use a cable.
1 meter long connection cable: reference CBB012 meter long connection cable: reference CBB025 meter long connection cable: reference CBB05
T1T2T3T4T5T6
T1T2T3T4T5T6
Relay ELR21 or 31 TCB earth leakage transformer
p19
Dimensions
TCA TCB
Reference A B C D E F GTCB35 95 91 24 35 111 125 49TCB70 127 110 24 70 144 157 49TCB110 162 145 24 110 179 192 49
A slow blinking (1.3Hz) of the checking LED indicates a correct operation.A fast blinking (10 Hz or a fixed position (still or lit) of the checking LED indicates a system error: problem on the earth leakage trans-former, or on the relay, or on the connection between them.
Type A B C D E FTCA35 81 71 26 35 96 111TCA70 120 110 26 70 134 150TCA110 170 160 26 110 184 200
D C
E
F
A
B
cheking led
p20
Word address0123456789
10
Descriptionmeasure of the input instant currentdecimal point / unitmeasure of the displayed current valuedecimal point / unitmeasure of the max. recorded current valuedecimal point / unitself-diagnosisstatus of the alarmsreclosing cycletime lapse before the next reclosingtotal number of reclosings
9. ANNEXE 2: MODBUS
9.1 Table of the modbus addresses
MeasuresThe following parameters: instant measure, displayed measure and max. recorded measure will be transmitted in the form of a module and a unit associated with a position of the decimal point.Eg.:
Coding of the integer decimal point / unit H L
dec.point unit: code of correspondance in the list hereunder 0: no decimal 0: none16: 1 decimal 1: V32: 2 decimals 2: kV48: 3 decimals etc ...Eg.: 416 = 1 X 256 + 161The integer encodes the unit mA with 1 decimalHence the measure read is 10.6 mA
BYTE BYTE
Table of the unitsCode Unit Code Unit Code Unit Code Unit Code Unit
000 001 V 002 KV 003 A 004 KA005 W 006 KW 007 MW 008 GW 009 VAr010 KVAR 011 MVAR 012 GVAR 013 VA 014 KVA015 MVA 016 GVA 017 Wh 018 KWh 019 MWh020 GWh 021 VARh 022 KVARh
023 MVARh024 GVARh025 Hz 026 Khz 027 Deg 028 Ohms 029 Kohms030 h 031 mn 032 s 033 % 034 cos PHI035 to 099 free
100 °C 101 °F 102 % 103 mm 104 cm105 m 106 km 107 mBar 108 Bar 109 Pa110 Kpa 111 Kg/cm2112 PSI 113 mCE 114 l/s115 l/mn 116 l/h 117 m3/s 118 m3/mn119 m3/h120 tr/s 121 rad/s
122 mm/s 123 cm/s 124 m/s125 m/mn 126 m/h 127 mm3 128 cm3 129 m3 130 g 131 kg 132 t 133 l 134 hl135 Rpm 136 CP/mn137 PH 138 mV AC139 V AC140 KV AC141 mA AC142 A AC 143 KA AC
144 mV DC145 V DC 146 KV DC147 mA DC148 A DC 149 KA DC150 Ohms 151 Kohms152 Mohms153 US.gal/s154 US.gal/min155 US.gal/h156 US.gal157 lb 158 C 159 imp160 CP 161 mA 162 A 163 mA.h 164 A.h165 µV 166 mV
bit
(0) programming error(1) rupture of the connection with the earth leakage transformer(2) input saturation (3) calibration error(4) external command status(5) test mode status(6) main alarm triggered(7) end of the automatic reclosing cycle (ELR30)
Self-diagnosis integer: (address 6 integer)
(15) memory error
(6) (5) (4) (3) (2) (1) (0)(15)
Integer status of the alarms (address 7 integer)
01234567
status of the alarm
status of the relay
} }pre-alarm main alarm
} ELR30 or 31 only
(7)
Word address01
Decimal value106416
Codingmoduledecimal point / unit
p21
Reclosing cycle (address 8 integer)
byte byte
H L15 0
L: total number of reclosings programmed per cycleH: number of reclosings performed in the cycle
Time lapse before the next reclosing (address 9 integer)
Value in seconds before the next reclosing.
Total number of reclosings (address 10 integer)
Value of the counter of the total of reclosings performed since the last zero reset of the counter (setting of the relay on tension, or reset of the counter from the keyboard).
External control via the digital data link
Writing of an integer to address 50
0: Reset of the alarms and zero reset of the reclosing cycle (ELR30)
65535 : Switching to the external test mode Triggering of the alarms (equivalent to the closing of the logic input)
23130 : Zero reset of the counter of the total of reclosings
2 bytes
CRC 16
Slave number
1 byte 1 byte 1 byte
Function3 or 4
2 bytes
CRC 16Number of read bytes
Reply sequence:1st word
MSB
value
LSB2 bytes
2nd word
MSB
value
LSB2 bytes
Slave number
1 byte 1 byte
Function16
2 bytes
CRC 161st word address
Nbr of words to be enfor.
Writing of N words: Function N°16:Request sequence:
Value of the words to be enforced
2 bytes 2 bytes
Nbr of words to be enfor.
2 bytes
Nbr of bytes to be enfor.
1 byte n bytes
Slave number
1 byte 1 byte 1 byte
Function16
1st word address
Reply sequence:
2 bytes
CRC 16
Slave number
1 byte 1 byte
Function6
2 bytes
CRC 16Address
of the word
Writing of 1 word: Function N°6:Request sequence:
2 bytes
Value of the word to be enf.
2 bytes
Value of the word to be enf.
2 bytes
Slave number
1 byte 1 byte 2 bytes
Function6
Address of the word
2 bytes
CRC 16Slave number
1 byte 1 byte 1 byte
Function reques-ted with MSB=1
Error code
Reply sequence:
Exception sequence:Value of the error codes:1: Unknown function code2: Address incorrect3: Data incorrect9: Writing impossible
Slave number
1 byte 1 byte
Function3 or 4
2 bytes
CRC 161st word
MSB
address
LSB
Number
MSB
of words
LSB2 bytes 2 bytes
Request sequence:
9.2 Description of the born modbus functions: Reading of N words: Function n°3
p22
Note 1: ⊕ = exclusive or.Note 2: POLY = A001 (hex).Note 3: The CRC16 calculation applies to all bytes in the sequence (except CRC16).Note 4: Caution! In the CRC 16, the 1st sent byte is the LSB.Example: Sequence 1-3-0-75-0-2 CRC16 = 180-29 (the values are decimal).
Measure = byte 3 x 2563 + byte 4 x 2562 + byte 1 x 256 + byte 2 = 0 x 2563 + 0 x 2562 + 19 x 256 + 136 = 5000
Reading of the address 3 => decimal point = 2 => displayed measure = 50.00
00000000
byte 3
00000000
byte 4
00010011
byte 1
10001000
byte 2
0
Sign : 0 positive 1 negative
0 19 136
Value of the measure:
254 3 4 19
• Reply with a positive measure:
136 0 CRC 160
measure
byte 1 byte 2 byte 3 byte 4 2 bytes
254 03 0 2
9.3 Reading in double integer format:Example: Reading of the displayed measureRequest:
0AddressReading
of n words
Slave number
Number of words
2 CRC 16
Measure = -(byte 3 x 2563 + byte 4 x 2562 + byte 1 x 256 + byte 2) = -(0 x 2563 + 0 x 2562 + 19 x 256 + 136) = - 5000Reading of address 3 => decimal point = 2 => displayed measure -50.00
11111111
byte 3
11111111
byte 4
111 0 11 0 0
byte 1
0 1111 0 0 0
byte 2
Sign: 1 negative: reversal of the bits, and plus 1.
254 3 4 236
• Reply with a negative measure:
120 255 CRC 16255
measure
byte 1 byte 2 byte 3 byte 4 2 bytes
00000000
byte 3
00000000
byte 4
00010011
byte 1
10000111
byte 2
00000000
byte 3
00000000
byte 4
00010011
byte 1
10001000
byte 2
0 0 19 136
Adding of 1
Reversal
9.4 CRC 16 calculation algorythm:
FFFF → CRC
CRC ⊕ BYTE→ CRC
yesno
n = 0
n = n + 1
yesno
shifting by 1 bit to the right of CRC
carry
CRC ⊕ poly → CRC
n > 7
next byte
no
END
yes
end of sequence