Lumel ND10 TYPE User manual

1
METER OF NETWORK
PARAMETERS
ND10 TYPE
USER’S MANUAL

3
Contents
1.APPLICATION ................................................................... 3
2.METER SET ...................................................................... 3
3.BASIC REQUIREMENTS AND OPERATIONAL SAFETY ..................... 3
4.INSTALLATION .................................................................. 3
5.METER DESCRIPTION .......................................................... 4
6.ND10 METER PROGRAMMING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7.SOFTWARE UPGRADE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8.RS-485 INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
9.ERROR CODES .................................................................24
10. TECHNICAL DATA .............................................................. 24
11. ORDERING CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

ND10-09/1 User's manual
3
1 APPLICATION
The ND10 meter is a digital programmable panel meter destined for the measurement of the 3-
phase, 4-wire power network parameters in balanced and unbalanced systems. It is also capable of
displaying measured quantities and their simultaneous digital transmission. The meter is also capable of
controlling and optimization of the power electronic devices, systems, and industrial installations.
The meter can be used for measuring: RMS value of voltage and current; active, reactive and apparent
power; active and reactive energy, power parameters; frequency, 15-, 30- and 60-minute mean active
power and THD. Additionally, a current in the neutral wire is calculated from the phase current vectors .
Voltage and current values are multiplied by given voltage and current ratios of measuring transformers.
Power and energy indications take into account all programmed ratio values. Any and all measured values
can be sent to the master via the RS-485 interface. The relay outputs signal alarm when selected
parameters exceed set limits. Impulse output can be used for consumption check of the 3-phase real
energy. This meter is also able to detect and signal incorrect phase sequence.
The meter is powered by the measuring circuit, i.e. from the voltage output.
There is a galvanic separation between following units of the meter:
- voltage and current inputs,
- RS-485 output,
- impulse output.
2 METER SET
Complete set of the meter includes:
- ND10 Meter 1 pcs.
- user's manual 1 pcs.
- warranty card 1 pcs.
- seal 1 pcs.
- panel mounting bracket 4 pcs.
3 BASIC REQUIREMENTS, OPERATIONAL SAFETY
ND10 Meter fully conforms with the requirements of EN 61010-1 standard.
Additional comments concerning safety:
•The meter should be installed and connected only by a qualified personnel. All relevant safety
measures should be observed during installation.
•Always check the connections before turning the meter on.
•Removal of the meter housing during the warranty period voids the warranty.
•This meter conforms to all requirements of the electromagnetic compatibility in the industrial
environment.
•Building power network should include switch or automatic circuit breaker positioned in the
convenient vicinity of the meter. It should be properly marked and available to operator at all times.
4 INSTALLATION
ND10 Meter is adapted to be mounted to the panel with mounting brackets (see Fig. 1). Meter housing
is made of plastic.
Housing dimensions: 96 x 96 x 77 mm. On the outer side of the meter there are screw and tab terminal
strips that can be used for connecting external wires with diameter up to 2.5 mm2.
Prior to installation a 92,5+0.6 x 92,5+0.6 mm slot must be made in the panel. The thickness of the panel
material should not exceed 15 mm. The meter must be placed in the panel from the front. During
installation the powering voltage must be off. When the panel is inserted in the slot, mount it in place with
provided mounting brackets.

ND10-09/1 User's manual
4
1
2
Fig. 1. Meter fitting
Fig. 2. Meter dimensions
5 METER DESCRIPTION
5.1 Current n puts
All current inputs are galvanically isolated (internal current transformers). The meter is suited to operate
together with external measuring current transformers. Displayed values of currents as well as their
derivative values are automatically calculated using set ratio value of the external transformer. Current
inputs are specified in the order as either 1 A or 5 A.
5.2 Voltage nputs
Displayed values of voltages as well as their derivative values are automatically calculated using set ratio
value of the external transformer. Voltage inputs are specified in the order as either 3 x 57.7/100 V, 3 x
230/400 V or 3 x 290/500 V.

ND10-09/1 User's manual
5
5.3 Connect on d agrams
Semi-indirect measurement
in a 4-wire network
Direct measurement
in a 4-wire network
L1
L2
L3
N
1819202123 2224252627
5678911
B A
GNDI
RS 485 AL1
ND10
+
WYimp
34 2
1213141517 16
1
AL2
1819202123 2224252627
5678911
BAGNDI
RS485 AL1
L1
L2
L3
ND10
N
+
WYimp
34 2
1213141517 16
1
S
1
S
2
P
1
P
2
S
1
S
2
P
1
P
2
S
1
S
2
P
1
P
2
AL2

ND10-09/1 User's manual
6
Caution: It is recommended to connect ND10 meters (RS-485) to a computer with a
shielded wire.A shield should be connected to ground in a single point. Shielded wire must be used in case
there are many interferences in the environment.
Fig 4. Connection diagrams of the meter in the 4-wire network.
Indirect measurement using
3 current transformers
and 3 voltage transformers
in 4-wire network
L1
L2
L3
S
1
S
2
P
1
P
2
S
1
S
2
P
1
P
2
S
1
S
2
P 1
P
2
N
1819202123 2224252627
5678911
BA GNDI
RS485 AL1
ND10
+
WYimp
34 2
1213141517 16
1
a
b
A
B
a
b
AB
a
bA
B
AL2

ND10-07/1 User's manual
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6 ND10 METER PROGRAMMING
6.1 Front panel
Fig. 5. Front panel
Front panel description:
1 – cancel button (ESC)
2 – move left button
3 – decrease value button
4 – increase value button
5 – move right button
6 – confirm button (ENTER)
7 – digital data transmission symbols
8 – connection / alarm symbols
9 – unit at displaying THD and power guard
10 – THD value display symbols
11 – power coefficient and power tangent
display symbol
12 – mean active power value display symbol
13 – menu safety symbol
14 – units of the displayed values
15 – 3-phase values display symbol
16 – base values ratios
17 – field for displaying base values, power, THD,
date, mean values, frequency, time and power
guard
18 – min / max value symbols
19 – symbols of value-phase connection
20 – power and energy characteristics symbol

ND10-07/1 User's manual
8
6.2 Power-on messages
After connection of voltage inputs the meter performs a display test and displays the ND10 meter
name, build and current software version.
where: r n.nn is a number of the current software version or special build number.
b n.nn is a bootloader version number.
Fig. 6. Meter start messages
Caution! If the display shows Err Cal or Err EE message, please contact the maintenance
service.
6.3 Parameter d splay
In the measurement mode, values are displayed according to set tables. Pressing button (left)
or (right) allows user to switch between displayed base values (table 1). Pressing button
(down) displays minimal value and pressing button (up) displays maximal value. When these
values are displayed, pressing the ESC button resets all minimal or maximal values. When
buttons and are pressed simultaneously, respective mean 3-phase values are displayed,
together with minimal and maximal values (see Table 2).
RS-485 interface allows setting the values that are to be displayed.
Error display is described in section 8.
When reactive power is displayed, this indication is accompanied by a symbol of the load: capacity
load ( ) or inductive load ( ).
Base values displayed in the field 17 (Fig. 5.). Option (parameter) shown in the Table 1 indicated that
displaying of this parameter may be turned off in register 4056 via RS485. Turning this parameter off
(from U to tg) disables displaying their respective mean / 3-phase values.
Table 1
Displayed symbols L1,V L2,
L3
L12,V
L23,
L31
L1,A
L2,
L3
L1,W
L2,
L3
L1,Var
L2,
L3
L1,VA
L2,
L3
L1,PF
L2,
L3
L1,tg
L2,
L3
kWh
Values
displayed
row 1 U1 U12 I1 P1 Q1 S1 PF1 tg1 Active
energy
consumed
row 2 U2 U23 I2 P2 Q2 S2 PF2 tg2
row 3 U3 U31 I3 P3 Q3 S3 PF3 tg3
Display fixed optio
nal fixed fixed option al optiona loptio nal optio nal optional

ND10-07/1 User's manual
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Displayed symbols -, kWh kVarh kVarh L1, THD U L2,
L3
L1, THD I
L2,
L3,
Values
displayed
row 1
Active
output
energy
Reactive
energy
(inductive)
/
Reactive
energy
(positive)
Reactive
energy
(capacity)
/
Reactive
energy
(negative)
THD U1 % THD I1 %
row 2 THD U2 % THD I1 %
row 3 THD U3 % THD I1 %
Display optional optional optional optional optional
Displayed symbols HZ 3L, W PAVG A % Date/time
Values
displayed
row 1 f(L3) ΣP3-phase (15,
30
or 60 min.) I(N) Ordered power
consumption
(within 15, 30 or
60 min.)
Year
row 2 min min min Month.day
row 3 max max max Hours : minutes
Display optio
nal optional optional optional optional
Mean values and corresponding minimal and maximal values (when pressed on the first 8
base value screens, following markers are highlighted: 3L, ,) .
Table 2
Displayed symbols 3L, V 3L, V 3L,A 3L, W 3L, Var 3L, VA 3L, PF 3L, tg
Values
displayed
row 1 ULNav.
3-phase
ULLav.
3-phase
Iav.
3-phase P Q S PF tg
row 2 min min min min min min min min
row 3 max max max max max max max max
When upper limit of the indication range is exceeded, it is indicated by two horizontal lines in upper
part of the display. Conversely, when lower limit is exceeded, it is indicated by two horizontal lines in
the lower part of the display. When mean power is measured ΣP3-phase separate measurements are
made for 15-second quantum. Depending on chosen value (15 min, 30 min, 60 min) calculated mean
value is based on 60, 120 or 240 measurements. After the meter is turned on or after the power is
reset, the first value will be calculated in 15 seconds after turning meter on or resetting. Until all
probed values of the active power are acquired, mean power value is calculated from values already
measured. Current in the neutral wire I(N) is calculated from phase current vectors.
When alarms are activated, symbols A1 and/or A2 are displayed. When alarms are deactivated and
alarm signalization latch is turned on, flashing symbols A1 and/or A2 are displayed.

ND10-07/1 User's manual
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6.4 Operat ng modes
Fig. 7. ND10 meter operating modes
O or
3 sec
O or
3 sec
3 sec
O or 30 sec
O or 30 sec
Tryb POMIAR
TEST
Par out ALr1
min max
lub
= 0
T
N
Change of quantity
value
dAtE
Data mode
Parameters acc. to
the table 7
T
Selection
of quantities for
modification
MEASURING mode
S switching on
Supply
Display of minimum
Aand maximum value Change
of displayed
basic quantities
Display of mean
and 3-phase quantities
Erasing of alarm
support
Preview of configured
parameters
rEAd onLY SEC code Introduce the code
O or
O or
O or 30 sec
Selection
of
parameters
Meterparameters mode
Parameters acc. to the
table 3
def = Y manufacturer’s
parameters
Output parameters mode
Parameters acc. to the
table 4
def = Y manufacturer’s
parameters
Parametersofalarm1or2
mode Parametersacc. to the
table 5
def = Y manufacturer’s
parameters
O or
30 sec
O or
30 sec
O or
30 sec
O or
30 sec
30
sec 30 sec 30
sec
30 sec
30 sec
30
sec
30
sec
30
sec
O or
Selection
of quantities for
modification
Selection
of quantities for
modification
O or
Selection
of quantities for
modification
O or
O or
O or
O or
O or
Change of quantity
value Change of quantity
value Change of quantity value
O or
O or
O or
O or
min
Erasing Erasing
T tSE
or
ALr2

ND10-07/1 User's manual
11
6.5 Parameter sett ng
ND10 meters are configured with the use of LPCon software available for free on the
www.lumel.com.pl web site.
Fig 8. Setup menu
Programming mode is enabled by pressing and holding button for about 3 seconds. To enable
the programming user bust enter a correct access code. If there is not such a code, the program
transits into the programming option. Message SET (in the first row) and first parameter group PAr
are displayed. User can view parameters at any time by pressing and holding button for about
3 seconds.
6.5.1
Sett ng of Meter Parameters
In options menu choose PAr (using or buttons) and confirm selection with the
button.
Table 3
Ite
mParameter name Marki ng Range Notes/description Manufact urer’s
value
1 Access code
entry SEC oFF, 1 … 60000 0 – no code 0
2 Current
transformer ratio tr_I 1 … 10000 1
3 Voltage
transformer ratio tr_U 0.1 … 4000.0 1
4 Mean active
power
synchronization
Syn 15, c_15,
c_30, c_60 Mean active power synchronization: 15 - 15-minute moving window
c_15 – measurement synchr. with clock
every 15 min.
c_30 – measurement synchr. with clock
every 30 min.
c_60 – measurement synchr. with clock
every 60 min.
15
5 Recording
minimal and
maximal values
complete with
errors
erLi oFF, on oFF – recording only correct values
(within measurement range),
on – recording all errors occurring in
measurements (values in 1e20 and
-1e20 registers)
on
6 Method of
reactive energy
calculation
En_q cAP, sIGn cAP – inductive and capacity energy
sIGn – positive and negative energy cAP
7 Display panel
illumination diSP oFF,1…60, on off, on, 1..60 – illumination time (in seconds) from pressing the button on
8 Energy counters En_0 no, EnP, no – no activity, EnP – erase active no

ND10-07/1 User's manual
12
erasing Enq, ALL energy, Enq – erase reactive, ALL –
erase all energies
9 Mean active
power erasing PA_0 no, yES yES – erase power no
10 Ordered power PAor 0 … 144.0 Power ordered to establish power
consumption in % of rated power 100
11 Default settings dEf no, yES reverting to default (factory) group
settings no
The automatic erasing of energy is carried out:
- for active energy when changing: voltage or current ratio;
- for reactive energy when changing: voltage or current ratio, reactive energy calculation method;
Buttons and are used for setting the values while buttons and are used for
choosing position of the number to be set. The active position is signaled by the cursor. Set value can
be accepted by pressing the button or canceled by pressing the button. When value is to
be accepted, it is checked against the acceptable value range. If the set value falls outside the
allowable range, the meter remains in parameter setting mode and the value is set to the highest
possible value (when entered value is too high) or lowest possible value (when it is too low).
6.5.2
Sett ng of Output Parameters
In Options choose the out mode and confirm your choice by pressing the. button. Table 4
Ite
mParameter name Markin grange Notes/description Manufact urer’s
value
1 # of impulses. Io_n 5000 …
20000 # of impulses per kWh 5000
2 MODBUS Network
Address Adr 1 … 247 1
3 Transmission mode trYb 8n2, 8e1,
8o1, 8n1 8n2
4 Transmission speed bAUd 4.8 k, 9.6 k,
19.2 k, 38.4 k 9,6 k
5Default settings dEf no, yES reverting to default (factory)
group settings no
6.5.3
Sett ng alarm paramet
ers
In Options choose ALr1 or ALr2 mode and confirm your selection by pressing the button.
Table 5
Ite
mParameter name Marki ng range Notes/description Manufact urer’s
value
1 Value on alarm output
(code as in Tab. 6) A1_n, A2_n table 6 P
2 Alarm type A1_t,
A2_t n-on, n-oFF, on,oFF, H-on,
H-oFF
Fig. 9. n-on
3 Lower value of the input
range A1oF, A2oF -144.0 … 144.0 in % of the rated quantity value 99.0
4 Upper value of the input
range A1on, A2on -144.0 … 144.0 in % of the rated quantity value 101.0
5 Time delay of the switch A1dt, 0 … 900 in seconds (for A1_n = P_ord, 0

ND10-07/1 User's manual
13
reaction A2dt delay occurs only when alarm
is activated)
6
Alarm signalization latch
A1_S,
A2_S, oFF, on When alarm signalization latch is enabled and the alarm state
ends, alarm symbol is not
turned off but begins to flash.
Alarm symbol flashes until it is
turned off by pressing both
and buttons (for 3
seconds). This function refers
only to the alarm signalization,
so the relay connectors will
operate without support
according to the selected alarm
type.
oFF
7 Alarm re-activation
block A1_b, A2_b, 0 … 900 in seconds 0
8 Default settings dEf no, yES reverting to default (factory)
group settings no
The write of the value ALon lower than ALoF switches the alarm off.
Selection of the monitored value:
Table 6
Item / value
in
4015
register
Displayed
element Quantity type
Value needed for
calculations of
percentage outputs and
alarm values (100 %)
00 oFF no quantity /alarm disabled/ none
01 U_1 L1 phase voltage Un [V] *
02 I_1 L1 phase wire current In [A] *
03 P_1 L1 phase active power Un x In x cos(0°) [W] *
04 q_1 L1 phase reactive power Un x In x sin(90°) [var] *
05 S_1 L1 phase apparent power Un x In [VA] *
06 PF1 L1 phase active power factor 1
07 tg1 tg factorϕof L1 phase 1
08 U_2 L2 phase voltage Un [V] *
09 I_2 L2 phase wire current In [A] *
10 P_2 L2 phase active power Un x In x cos(0°) [W] *
11 q_2 L2 phase reactive power Un x In x sin(90°) [var] *
12 S_2 L2 phase apparent power Un x In [VA] *
13 PF2 L2 phase active power factor 1
14 tg2 tg factorϕof L2 phase 1
15 U_3 L3 phase voltage Un [V] *
16 I_3 L3 phase wire current In [A] *
17 P_3 L3 phase active power Un x In x cos(0°) [W] *
18 q_3 L3 phase reactive power Un x In x sin(90°) [var] *
19 S_3 L3 phase apparent power Un x In [VA] *
20 PF3 L3 phase active power factor 1
21 tg3 tg factorϕof L3 phase 1
22 U_A mean 3-phase voltage Un [V] *
23 I_A mean 3-phase current In [A] *
24 P 3-phase active power (P1+P2+P3) 3 x Un x In x cos(0°) [W] *

ND10-07/1 User's manual
14
25 q 3-phase reactive power (Q1+Q2+Q3) 3 x Un x In x sin(90°) [var] *
26 S 3-phase apparent power (S1+S2+S3) 3x Un x In [VA] *
27 PF_A 3-phase active power factor 1
28 tg_A tg factorϕfor 3 phases 1
29 FrEq frequency 100 [Hz]
30 U12 phase-to-phase voltage L1-L2
3
Un [V] *
31 U23 phase-to-phase voltage L2-L3
3
Un [V] *
32 U31 phase-to-phase voltage L3-L1
3
Un [V] *
33 U4_A mean phase-to-phase voltage
3
Un [V] *
34 P_At mean active power 3 x Un x In x cos(0°) [W] *
35 P_ord used % of the ordered active power
(used energy) 100 [%]
36 I_ne neutral wire current In [A] *
*Un, In – voltage and current rated values
a)
n-on b)
n-oFF
c)
On d)
OFF
Fig. 9.Alarm types (x – alarm no.): a),b) normal c) off d) on.
Remaining types of the alarm:
−H-on – always on;
−H-oFF – always off.
−
Example 1 of alarm setting:
Set n-on alarm type for monitored quantity P – 3-phase active power,
Version: 5A; 3 x 230/400 V. Setting the alarm on after exceeding 3800 W, switching the alarm off
after power drops to 3100 W.
Calculations:: rated 3-phase active power: P = 3 x 230 V x 5 A = 3450 W
3450 W – 100 % 3450 W – 100 %
3800 W –A1on % 3100 W –A1oF %
1
0
Relay
disabled
Axon
Axof
Measured value
Contact
state
Relay
enabled
1
0
AxonAxof
Measured value
Relay
enabled Relay disabled
Contact
state
1
0
AxonAxof
Contact
state
Relay
disabled
Relay
enabled Relay
disabled
Measured value
1
0
AxonAxof
Contact
state
Relay
enabled Relay
enabled
Relay
disabled
Measured value

ND10-07/1 User's manual
15
In conclusion: A1on = 110,0 % A1oF = 90,0 %
Set: Monitored quantity: P; type of alarm: n-on, A1on 110,0, A1oF 90,0.
Example no 2 of alarm setting:
The value of ordered power consumption may be used for the purpose of prior warning that ordered
power might be exceeded. Ordered power consumption is calculated according to time period set for
the mean active power synchronization and value of the ordered power. Pre-emptive alarm should be
set so that it indicates the possibility of exceeding ordered power of 1MW at 90 % assuming
allocation of 15-minutes
(900 s). Measuring current transformer 2500: 5A, voltage 230 V. Peak max power consumption 1,5
MW.
Calculations::
ND10 meter active rated 3-phase power: P = 3 x kU x Unx kIx In= 3 x 1 x 230 V x 500 x 5A = 1,725
MW →100 %.
Ordered-to-rated power ratio = 1 MW / 1.725 MW ≈57,97 % of meter rated value (rounded down) -
Pord;
Alarm operation hysteresis: alarm should be activated at 90 % ordered power (A1on), and
deactivated for e.g.: at 1 % lower 89 % (A1of).
Optimization of power limit function (delay at alarm activation):
alarm activation delay to=10%∗
[
1MW∗900 s
1,5 MW
]
=60 s(A1dt) .
Fig. 10. Measurement of used ordered 15 minutes’ active power
consumption synchronized with the clock, with alarm set on a 90%
consumption.
Fig. 10 shows an example of
how the consumed ordered
active power parameter can be
used to alarm activation. Delay
time is set at 0 seconds (A1dt).
In presented example for the
remaining 10 % of ordered
power at maximum power
consumption, all devices could
operate for additional 60
seconds without imposing
penalties. If the delay time A1dt
had been set to 60 seconds,
alarm would not have been
activated.
Set alarm as following: monitored quantity: A1_n = P_ord; alarm type: A1_t = n-on; A1on = 90,0,
AL1oF = 89,9; delay time A1dt = 0 or 60 s; A1_s = 0;A1_b = 0. Parameters should be set as
following: tr_I = 500; Syn = 15 or c_15, and Pord = 57.9.
1 MW
0
A1on = 90.0 %
Time
Imported
power
1
0
Relay
enabled
A1of = 89.9 % Ordered power
State of
contacts
1,5 MW
100 %
Ordered power
(energy)
90 %
8:00:00 8:15:00
8:14:05
8:07:30
Time of delay A1dt = 0 sec
Relay
disabled

ND10-07/1 User's manual
16
6.5.4
Sett ng Date and T me
In Options choose dAtE mode and confirm the selection with button. Seconds are reset to 0
after hour and minute values are set. Table 7
Ite
mParameter name Markin grange Manufacturer’s value
1 Hour, minute t_H 0…23, 0..59 00.00
2 Month, day t_d 1…12, 1…31 1.01
3 Year t_y 2001 … 2100 2001
7 Software upgrade
ND10 meter (with digital output) allows for firmware upgrade via PC with LPCon software installed.
LPCon software is available as freeware on the www.lumel.com.pl web site. Upgrade is possible if PC
is connected to RS485 to USB converter, such as PD10 converter.
a) b)
Fig. 11. Program window view: a) LPCon, b) software upgrades
Important! Software upgrade automatically reverts meter to its default (factory) settings, so it is
recommended to save meter settings with LPCon software before upgrading.
After launching LPCon program, set in Options required serial port, speed, mode and address of the
meter. Next, choose ND10 meter from Devices menu and click the Read icon to read all set
parameters (required for later recovery). After choosing Device software upgrade option from
Upgrade menu a Lumel Updater window appears(LU) – Fig. 11 b. Press Connect. The Messages
information window displays information concerning upgrade process. If the port is opened correctly,
a Port opened message appears. Upgrade mode may be entered using either of the two methods:
remotely via LU (using LPCon settings: address, mode, speed, COM port) or by switching on a meter
with a button pressed (while entering bootloader mode, upgrade button is used to set default
communication settings of the meter). Meter display shows the "boot" message and the software
version while the LU program displays Device found message along the name and version of the
software of connected device. Click the ... button and browse to the meter upgrade file. If the file is
opened correctly, a File opened message is displayed. Press the Send button. When upgrade is
successfully completed, meter reverts to the default settings and begins normal operation while the
information window displays Done message and upgrade elapsed time. After the LU window is
closed, click the Save icon to save all initially read parameters. Current software version can be
checked by reading Device information from LPCon software.

ND10-07/1 User's manual
17
Important! Turning the meter off during upgrade process may result in permanent damage!
8 RS-485 INTERFACE
Overview of the ND10 serial port parameters.
•identifier 0xCB
•meter address 1..247
•transmission speed 4.8, 9.6, 19.2, 38.4 kbit/s,
•operation mode Modbus RTU,
•transmission mode 8N2, 8E1, 8O1, 8N1,
•max. response time 750 ms.
•max. no. of registers read in a single query
- 40 4-byte registers,
- 80 2-byte registers,
•implemented functions - 03,06,16, 17,
- 03 register read,
- 06 1st register write,
- 16 register write,
- 17 device identification,
Manufacturer’s settings: address 1, speed 9.6 kbit/s, mode RTU 8N2,
ND10 meter register map
ND10 meter has data contained in 16-bit and 32-bit registers. Process variables and meter
parameters are placed in the address area of registers in a way depended on the variable value
type. Bits in 16-bit registers are numbered from the youngest to the oldest (b0-b15). 32-bit
registers include numbers of float type in IEEE-754 standard. Sequence of 3210 bytes – the
oldest is transmitted as the first. Table 8
Address range Value type Description
4000 – 4057 Integer
(16 bits) Value set in the 16-bit register. Register description is presented in Table 9. Read and write registers.
7000 – 7319 Float
(2x16 bits)
Value is set in the two following 16-bit registers. These
registers contain the same data as 32-bit registers from 7500
– 7659 range. Readout registers. Bit sequence (3-2-1-0)
7500 – 7659 Float
(32 bits) Value set in the 32-bit register. Register description is presented in Table 10. Readout registers.
Table 9
Register
address Operat ions Range Description Default
4000 RW 0 … 60000 Protection - password 0
4001 reserved
4002 RW 0...1200 [o/oo]Mean ordered power *10
nominal signals 1000
4003 RW 1 … 10000 Current transformer ratio 1
4004 RW 1 … 40000 Voltage transformer ratio *10 10
4005 RW 0..3 Mean active power synchronization:
0 - 15-minute moving window
1 – measurement synchr. with clock every 15
minutes,
0

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2 – measurement synchr. with clock every 30
minutes,
3 – measurement synchr. with clock every 60
minutes,
4006 reserved
4007 RW 0.1 Max and min value saving method: 0 – no
errors, 1 – with errors 0
4008 reserved
4009 RW 0.1 Reactive energy calculation method: 0 – inductive and capacity energy
1 – positive and negative energy 0
4010 RW 0 … 61 Display panel illumination: 0 – off, 1-60 – illumination time in seconds from
pressing the button; 61 – always on 61
4011 RW 0 … 3
Energy counters erasing
0 – no changes, 1 – erase active energies,
2 – erase reactive energies, 3 – erase all
energies
0
4012 RW 0.1 Erasing mean active power PAV 0
4013 reserved
4014 RW 0.1 Min and max erasing 0
4015 RW 0.1..35 Quantity on the relay output of alarm 1
(code as in Table 6) 24
4016 RW 0..5 Output type 1: 0 – n-on, 1– n-oFF, 2 – on,
3 – oFF, 4 – H-on, 5 – H-oFF 0
4017 RW -1440..0..1440
[o/oo]Lower value of the alarm 1 switch
of the rated input range 990
4018 RW -1440..0..1440
[o/oo]Upper value of the alarm 1 switch
of the rated input range 1010
4019 RW 0..900 s Alarm 1 switch delay value (forAL_n = P_ord – register 4015 = 35, delay occurs only at alarm
activation) 0
4020 RW 0.1 Alarm 1 signalization latch 0
4021 RW 0..900 s Alarm 1 re-activation block 0
4022 RW 0.1..35 Quantity on the relay output of alarm 2
(code as in Table 6) 24
4023 RW 0..5 Output type 1: 0 – n-on, 1– n-oFF, 2 – on,
3 – oFF, 4 – H-on, 5 – H-oFF 0
4024 RW -1440..0..1440
[o/oo]Lower value of the alarm 2 switch
of the rated input range 990
4025 RW -1440..0..1440
[o/oo]Upper value of the alarm 2 switch
of the rated input range 1010
4026 RW 0..900 s Alarm 2 switch delay value (forAL_n = P_ord – register 4015 = 35, delay occurs only at alarm
activation) 0
4027 RW 0.1 Alarm 2 signalization latch 0
4028 RW 0..900 s Alarm 2 re-activation block 0
4029 RW 5000 … 20000 No. of impulses for the impulse output 5000
4030 RW 1..247 MODBUS Network Address 1
4031 RW 0..3 Transmission mode: 0->8n2, 1->8e1, 2->8o1,
3->8n1 0
4032 RW 0..3 Transmission speed: 0->4800, 1->9600 1

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2->19200, 3->38400
4033 RW 0.1 Upgrade change of transmission parameters 0
4034 RW 0 … 2359 Hour *100 + minutes 0
4035 RW 101 … 1231 Month * 100 + day 101
4036 RW 2009 … 2100 Year 2009
4037 RW 0.1 Standard parameters save (complete with reseting energy as well as min, max and mean
power to 0) 0
4038 RW 0..15258 Consumed active energy, two older bytes 0
4039 RW 0..65535 Consumed active energy, two younger bytes 0
4040 RW 0..15258 Released active energy, two older bytes 0
4041 RW 0..65535 Released active energy, two younger bytes 0
4042 RW 0..15258 Reactive inductive energy, two older bytes
4043 R 0..65535 Reactive inductive energy, two younger bytes
4044 R 0..15258 Reactive capacity energy, two older bytes 0
4045 R 0..65535 Reactive capacity energy, two younger bytes 0
4046 reserved
4047 reserved
4048 reserved
4049 reserved
4050 R 0..65535 Status Register – see description below 0
4051 R 0..65535 Status Register 2 – see description below 0
4052 reserved
4053 R 0..65535 Serial number two older bytes -
4054 R 0..65535 Serial number two younger bytes -
4055 R 0..65535 Software version (*100) -
4056 RW 0..65535 Quantity parameters displayed 0xFFFF
4057 reserved
Brackets [ ] contain, respectively: resolution or unit.
Energy is made available in hundreds of watt-hours (var-hours) in double 16-bit register, and for this
reason, one must divide them by 10 when calculating values of particular energy from registers, e.g.:
Consumed active energy = (reg. value 4038 x 65536 + reg. value 4039) / 10 [kWh]
Released active energy = (reg. value 4040 x 65536 + reg. value 4041) / 10 [kWh]
Reactive inductive energy = (reg. value 4042 x 65536 + reg. value 4043) / 10 [kVarh]
Reactive capacity energy = (reg. value 4044 x 65536 + reg, value 4045) / 10 [kVarh]
Status Register (address 4050, R):
Bit 15 – „1” – non-volatile memory damage Bit 7 – „1” – power averaging interval has not
ended
Bit 14 – „1” – no calibration or calibration error Bit 6 – „1” – frequency for THD calculation
outside ranges:
−48 – 52 for 50 Hz,
−58 – 62 for 60 Hz
Bit 13 – „1” – parameters value error Bit 5 – „1” – voltage too low for measurement of
Bit 12 – „1” – energy value error frequencies
Bit 11 – „1” – phase sequence error Bit 4 – „1” – L3 phase voltage too low
Bit 10 – current range „0” – 1 A~; 1” – 5 A~ Bit 3 – „1” – L2 phase voltage too low
Bit 2 – „1” – L1 phase voltage too low
Bit 1 – „1” – RTC
Bit 0 – relay output state „1” – on, „0” - off
Bit 9 Bit 8 voltage range
0 0 57,7 V~
0 1 230 V~

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Status Register 2 – reactive power characteristics (address 4051, R):
Bits 15 ... 12 - reserved
Bit 11 – „1” – capacity 3L max,
Bit 10 – „1” – capacity 3L min.
Bit 9 – „1” – capacity 3L
Bit 8 – „1” – capacity L3 max.
Bit 7 – „1” – capacity L3 min.
Bit 6 – „1” – capacity L3
Bit 5 – „1” – capacity L2 max.
Bit 4 – „1” – capacity L2 min.
Bit 3 – „1” – capacity L2
Bit 2 – „1” – capacity L1 max.
Bit 1 – „1” – capacity L1 min.
Bit 0 – „1” – capacity L1
Configuration register of displayed base quantities parameters (address 4056, R/W):
Bit 15 – „1” – phase-to-phase display
Bit 14 – „1” – reactive power display
Bit 13 – „1” – apparent power display
Bit 12 – „1” – power factor display
Bit 11 – „1” – power tangent display
Bit 10 – „1” – consumed active power display
Bit 9 – „1” – released active power display
Bit 8 – „1” – reactive capacity energy display
Bit 7 – „1” – reactive inductive power display
Bit 6 – „1” – current THD display
Bit 5 – „1” – voltage THD display
Bit 4 – „1” – frequency display
Bit 3 – „1” – mean active power display
Bit 2 – „1” – neutral wire current display
Bit 1 – „1” – usage of ordered power display
Bit 0 – „1” – time and date display
Table 10
16-bit
register
address
Registe
r
addres
s
32-bit
Oper
ation
sDescription Unit
7000 7500 R L1 phase voltage V
7002 7501 R L1 phase current A
7004 7502 R L1 phase active power W
7006 7503 R L1 phase reactive power var
7008 7504 R L1 phase apparent power VA
7010 7505 R L1 phase power factor (PF) -
7012 7506 R L1 phase reactive to active power ratio -
7014 7507 R L2 phase voltage V
7016 7508 R L2 phase current A
7018 7509 R L2 phase active power W
7020 7510 R L2 phase reactive power var
7022 7511 R L2 phase apparent power VA
7024 7512 R L2 phase power factor (PF) -