Gossen MetraWatt LonWorks U128-W1 Series User manual

Interface Description
U128x-W1 and U138x-W1
Electronic Active and reactive Energy Meters
with LON Interface 3-349-312-03
6/6.11

2GMC-I Messtechnik GmbH
Table of Contents
Page
1 General Information Regarding the LON Bus ................... 2
2 Overview .......................................................................... 2
3 Wiring ............................................................................... 2
3.1 Network Topologies ......................................................................2
3.2 Recommendations .........................................................................2
3.3 Use of Repeaters ...........................................................................2
3.4 Maximum Cable Lengths ...............................................................3
3.5 Cable Type ....................................................................................3
3.6 Bus Termination ...........................................................................3
4 Network Interface ............................................................ 3
4.1 Network Variables ..........................................................................3
4.2 Units and Resolutions .....................................................................4
4.3 Functions of the Energy Meter Object ..............................................5
4.3.1 Resetable Energy Meter ................................................................5
4.3.2 Freezable Energy Meter .................................................................5
4.3.3 Energy Meter for Active and Reactive Energy ..................................5
4.4 Control and Display Functions .........................................................6
4.5 S0 Pulse Rate ................................................................................7
4.6 Error Messages .............................................................................7
4.7 Configuring the Meter with the LNS Plug-In
and Displaying Current Measured Values ........................................8
4.7.1 Downloading, Unzipping, Installing, Registering and
Starting the LNS-Plug ....................................................................8
4.7.2 Descriptions of Tab Cards for the LNS Plug-In .................................9
5 Product Support ............................................................. 12
1 General Information Regarding the LON Bus
LON (local operating network) is a multi-network compatible
communication system for distributed applications.
Central control tasks are broken down into subtasks which are
then executed in a decentralized fashion. The subtasks are
executed at so-called nodes without placing any load on the bus
system.
Functional units are assigned to the nodes, for example units
required for ascertaining measured quantities.
The system can be centrally controlled, operated and configured
via the LON interface by means of an LNS plug-in for a Windows
application.
LON is used primarily in building automation applications.
2 Overview
Series U128x-W1 and U138x-W1 energy meters consist of 5
objects:
Node nodeObject
Voltmeter voltMeter
Ammeter amMeter
Energy meter energyMeter
Power meter powerMeter
3Wiring
The most commonly utilized transmission medium for industrial
and building management applications is twisted pair copper
cable, which is used together with the electrically isolated
FTT-10A transceiver. Both of the conductors can be connected to
either pole, and installation is thus reverse polarity protected.
Maximum transmission distances are influenced by the electrical
characteristics of the cable, and network topology.
Utilized cables should comply with the stipulated specifications in
order to prevent interference during communication. Due to the
possibility of reflections, only one cable type may be used in any
given bus segment.
3.1 Network Topologies
Where bus topologies are used, the individual devices are con-
nected in parallel one after the other. A bus terminating resistor
must be used at each end. Only one bus terminator is required
with free topologies, but transmission distances are limited in this
case.
The energy meters are not equipped with internal bus terminating
resistors (see chapter 3.6 on page 3).
3.2 Recommendations
The following recommendation is based upon experience gained
by GMC-I Messtechnik GmbH during installation and start-up of
LON systems. The environment within which the cable is laid has
a decisive influence on correct cable selection, and must there-
fore be taken into consideration during the planning stage. All
generally applicable directives for laying control and telecommuni-
cations cables must be adhered to during installation.
3.3 Use of Repeaters
If repeaters are used the bus signal can be refreshed, thus
increasing maximum possible transmission distance. Due to
response characteristics, only one passive repeater may be
included within any given bus segment. The transition to other
physical transmission media, and/or targeted forwarding of data
packets to individual bus segments, is accomplished by means of
routers.
Bus Topology
(bus terminator at both ends)
Free Topology
(bus terminator at one end)

GMC-I Messtechnik GmbH 3
3.4 Maximum Cable Lengths
Specified values apply to total cable length, and are only valid for
the FTT-10A transceiver.
3.5 Cable Type
Inexpensive wiring is possible for applications in environments
with minimal interference using the following cable type:
JY (ST) Y 2 ea. 2 x 0.8 mm with twisted wire pairs. The above
specified dimension of 0.8 mm refers to the diameter of the wire,
which results in a wire cross-section of 0.5 square mm.
In most cases no shielding is required. It may be possible to
eliminate communications problems occurring in environments
with excessive interference by connecting the shield at one end. If
cables are used which contain several wire pairs, it may be
advantageous if the individual pairs are shielded. Special LON bus
cable can be used for highly demanding requirements.
3.6 Bus Termination
An adjustable bus terminator is frequently included in master
stations, which must be set in accordance with the utilized
topology. Additional bus terminators are required for bus topolo-
gies, and where repeaters are utilized. These can be purchased
as auxiliary LON component U1664 in top-hat rail mount housing.
Each unit includes a one-ended and a two-ended bus terminator.
4 Network Interface
4.1 Network Variables
Measured quantities and energy meter status information
available within the network are defined as standard network
variable types (SNVT).
The software tools can be furnished with all information necessary
for integration by accessing the GMC-I Messtechnik GmbH web-
site at www.gossenmetrawatt.com.
Node – nodeObject ObjectId: 0
Ammeter – amMeter ObjectId: 1
Cable Type /
Cable Designation
Bus Topology
(bus terminator at both ends)
Free Topology
(bus terminator at one end)
JY (ST) Y 2 ea. 2 x
0.8 mm
900 m 500 m, max. 320 m device to
device
UNITRONIC bus
cable
900 m 500 m, max. 320 m device to
device
Level IV, 22AWG 1400 m 500 m, max. 400 m device to
device
Belden 8471 2700 m 500 m, max. 400 m device to
device
Belden 85102 2700 m 500 m
Bus Terminator at Both Ends
100 F / 50 V
100 F / 50 V
105  1%
100 F / 50 V
100 F / 50 V
52.3  1%
Bus Terminator at One End
Nv
Index
Network Variable Data Type Description
0 nviRequest SNVT_obj_request Query the object status
2 nvoStatus SNVT_obj_status Read out the object status
3 nvoFileDirectory SNVT_address Start address of the configuration file
1 nviTimeSet SNVT_time_stamp Set date and time
4 nvoOemType SNVT_str_asc Device type and features
5 nvoSerialNumber SNVT_str_asc Serial number and firmware
version of the master program
6 nvoPowerUpHours SNVT_time_hour Operating hours since the last time
operating voltage was switched on
Im-
port
Configuration
Property
Data Type Description
Nv 1 cpMaxStsSendT SCPTmaxSndT
(SNVT_elapsed_tm)
Maximum time until transmission of
nvoStatus
De-
vice
cpDevMajVer SCPTdevMajVer
(unsigned short)
LON firmware version, read-only
De-
vice
cpDevMinVer SCPTdevMinVer
(unsigned short)
LON firmware version, read-only
De-
vice
cpLocation SCPTlocation
(SNVT_str_asc)
Installation location and meter
number
Nv
Index
Network Variable Data Type Description
Phase current
7 nvoI1 SNVT_amp_f Current in phase L1
9 nvoI2 SNVT_amp_f Current in phase L2
8 nvoI3 SNVT_amp_f Current in phase L3
10 nvoIAvg SNVT_amp_f Phase current mean value
Im-
port
Configuration
Property
Data Type Description
Current transformer data
Object cpAmpMaxSndT
SCPTmaxSendTime
(SNVT_time_sec)
Send condition: maximum time until
transmission of network variables
Object cpAmpSndDelta
UCPTampSendDelta
(SNVT_amp_f)
Send condition: delta current
Object cpCTConnType UCPTconnType
(conn_type)
Current transformer connection type,
read-only
Object cpCTPrimary
UCPTctCurrentPrim
(SNVT_amp_f)
Nominal primary transformer current
Object cpCTSecondary UCPTctCurrentSec
(SNVT_amp_f)
Nominal secondary transformer
current

4GMC-I Messtechnik GmbH
Power meter – powerMeter ObjectId: 2
Voltmeter – voltMeter ObjectId: 3
Energy meter – energyMeter ObjectId: 4
1) Clear the meter reading (clear).
The nvoWhTot meter reading can be set to zero with nviEnrgyClr.
The nvoRegValWhTot meter reading remains unaffected.
2) Save the meter reading (freeze).
If the nviEnergyFreeze network variable is transmitted to the meter, the meter saves its
current meter reading along with a time stamp, nvoRegValWhFr.
4.2 Units and Resolutions
Ammeter – amMeter ObjectId: 1
Current
Index Network Variable Data Type Description
Active Power
11 nvoWatTot SNVT_power_f Total active power, all 3 phases
12 nvoWat1 SNVT_power_f Active power in phase L1
13 nvoWat2 SNVT_power_f Active power in phase L2
14 nvoWat3 SNVT_power_f Active power in phase L3
Reactive Power
15 nvoVarTot SNVT_power_f Total reactive power, all 3 phases
Power Factor
16 nvoPwrFactrTot SNVT_pwr_fact Overall power factor
17 nvoPwrFactr1 SNVT_pwr_fact Power factor in phase L1
18 nvoPwrFactr2 SNVT_pwr_fact Power factor in phase L2
19 nvoPwrFactr3 SNVT_pwr_fact Power factor in phase L3
Im-
port
Configuration
Property
Data Type Description
Nv 11
... 15
cpPwrSndDelta
UCPTpwrSendDelta
(SNVT_power_f)
Send condition: delta power
(active and reactive power)
Nv 16
... 19
cpPwrFacSndDelta
UCPTpwrFactSendDelta
(SNVT_pwr_fact)
Send condition:
delta power factor
Object cpPwrMaxSndT
SCPTmaxSendTime
(SNVT_time_sec)
Send condition: maximum time until
transmission of network variables
Nv
Index
Network Variable Data Type Description
Phase Voltages
20 nvoU12 SNVT_ volt_f Phase-to-phase voltage, L1 and L2
21 nvoU23 SNVT_ volt_f Phase-to-phase voltage, L2 and L3
22 nvoU31 SNVT_ volt_f Phase-to-phase voltage, L3 and L1
23 nvoU1N SNVT_ volt_f Phase-to-neutral voltage, L1 and N
24 nvoU2N SNVT_ volt_f Phase-to-neutral voltage, L2 and N
25 nvoU3N SNVT_ volt_f Phase-to-neutral voltage, L3 and N
27 nvoUAvg SNVT_ volt_f Phase voltage mean value
26 nvoFreq SNVT_ freq_hz Fundamental voltage frequency
Im-
port
Configuration
Property
Data Type Description
Object cpVoltMaxSndT
SCPTmaxSendTime
(SNVT_time_sec)
Send condition: maximum time until
transmission of network variables
Nv 20
...26,
27
cpVoltSndDelta
UCPTvoltSendDelta
(SNVT_volt_f)
Send condition: delta voltage
Nv 26 cpFreqSndDelta
UCPTfreqSendDelta
(SNVT_freq_hz)
Send condition: delta frequency
Object cpPTConnType
UCPTconnType
(conn_type)
Voltage transformer connection type,
Object cpPTPrimary
UCPTptVoltagePrim
(SNVT_volt_f)
Nominal primary transformer voltage
Object cpPTSecondary
UCPTptVoltageSec
(SNVT_volt_f)
Nominal secondary transformer
voltage
Nv
Index
Network Variable Data Type Description
28 nviEnergyClr 1) SNVT_switch Reset nvoWhTot
30 nvoWhTot
SNVT_elec_whr_f Total active energy, all 3 phases
31 nvoVarhTot SNVT_elec_whr_f Total reactive energy, all 3 phases
32 nvoEnergyClrTs SNVT_time_stamp Date and time of resetting of
nvoWhTot and nvoVarhTot
29 nviEnergyFreeze
2)
SNVT_switch Freeze active energy meter reading
36 nvoRegValWhFr
SNVT_reg_val_ts Frozen meter reading with date and
time
38
nvoRegValWhTot SNVT_reg_val Total active energy, all 3 phases,
cannot be reset
37
nvoRegValWhSec SNVT_reg_val Total secondary active energy, all 3
phases, cannot be reset
39
nvoRegValVarhTot SNVT_reg_val Total reactive energy, all 3 phases,
cannot be reset
34
nvoEnergyPwrPri UNVT_energyPower Energy, power and fault for use with
U1601
35
nvoEnergyPwrSec UNVT_energyPower Secondary energy, secondary power
and fault for use with U1601
40 nvoEnergyPwrVarh
UNVT_energyPower Reactive energy, reactive power and
fault for use with U1601
33
nvoEnergyFlowHrs SNVT_time_hour Operating hours exceeded with the
meter’s start-up threshold
Im-
port
Configuration
Property
Data Type Description
Object cpEnergyMaxSndT
SCPTmaxSendTime
(SNVT_time_sec)
Send condition: maximum time until
transmission of network variables
Object cpEnergySndDelta
UCPTenergySendDelta
(SNVT_elec_whr_f)
Send condition: delta energy
Object
cpEngyAccumMode UCPTenergyAccumMode
(acc_mode)
Energy meter operating mode,
read-only
Object cpPulseRate UCPTpulseRate
(SNVT_count_f)
Pulse rate, S0 output 1, pulses per
kWh, with reference to secondary
energy, writeable with features V2
and V4, otherwise read-only
CT Display LON
Unit
LON
Resolution
U128x xx.xx A A 10 mA
1 x.xxx A A 1 mA
2 ... 10 xx.xx A A 10 mA
11 ... 100 xxx.x A A 100 mA
101 ... 1000 xxxx A A 1 A
1001 ... 10 000 xx.xx kA A 10 A

GMC-I Messtechnik GmbH 5
Voltmeter – voltMeter ObjectId: 3
Voltage
Power Meter – powerMeter ObjectId: 2
Power
Energy Meter – energy Meter ObjectId: 4
Energy
4.3 Functions of the Energy Meter Object
4.3.1 Resetable Energy Meter
Clearing the Meter Reading
Meter readings nvoWhTot and nvoVarhTot are set to zero with
nviEnergyClr (value>0, state=1). nvoEnergyClrTs takes time and
date from nviTimeSet at the node object
4.3.2 Freezable Energy Meter
Freezing the Meter Reading
If the nviEnergyFreeze network variable (value > 0, state = 1) is
transmitted to the meter, the meter saves its present meter
reading nvoRegValWhTot together with time and date from
nviTimeSet. nvoRegValWhFr displays the frozen meter reading
with date and time.
4.3.3 Energy Meter for Active and Reactive Energy
These meters cannot be reset. They have the following meanings:
The network variable nvoEnergyFlowHrs indicates the number of
operating hours. Operating hours are only counted when start-up
current has been exceeded. Only full hours are saved to memory.
Manufacturer-Specific Configuration Types (UCPTs)
typedef enum conn_type_t{
}conn_type;
typedef enum acc_mode_t{
}acc_mode;
VT at U3 (100 V) VT
at U5 ... U7
Display LON
Unit
LON
Resolution
-- U128x xxx.x V V 0.1 V
1 ... 4 1 xxx.x V V 0.1 V
5 ... 40 2 ... 10 xxxx V V 1 V
41 ... 400 11 ... 100 xx.xx kV V 10 V
401 ... 1000 101 ... 1000 xxx.x kV V 100 V
CTxVT at U3 CTxVT
at U5 ... U7
Display LON
Unit
LON
Resolution
--- U128x xx.xx kW W 10 W
1 ... 4 1 xxxx W W 1 W
5 ... 40 2 ... 10 xx.xx kW W 10 W
41 ... 400 11 ... 100 xxx.x kW W 100 W
401 ... 4000 101 ... 1000 xxxx kW W 1 kW
4001 ... 40 000 1001 ... 10 000 xx.xx MW W 10 kW
40 001 ... 400 000
10 001 ... 100 000 xxx.x MW W 100 kW
400 001 ... 1000 000 100 001 ... 1000 000 xxxx MW W 1 MW
CTxVT Display LON
Unit
LON
Resolution
LON
cWh
U128x xxxxx.xx kWh kWh 10 Wh 0.1 Wh
1 ... 10 xxxxxxx Wh kWh 1 Wh 0.01 Wh
11 ... 100 xxxxx.xx kWh kWh 10 Wh 0.1 Wh
101 ... 1000 xxxxxx.x kWh kWh 100 Wh 1 Wh
1001 ... 10000 xxxxxxx kWh kWh 1 kWh 10 Wh
10 001 ... 100 000 xxxxx.xx MWh MWh 10 kWh 100 Wh
100 001 ... 1 000 000 xxxxxx.x MWh MWh 100 kWh 1 kWh
nvoRegValWhTot nvoRegValWhSec nvoRegValVarhTot
U1280 Active energy Active energy Reactive energy
U1380 Q0 Active energy Active energy Reactive energy
U1380 Q1 Primary active energy
Secondary active energy ,
calibrated at P1
Primary reactive
energy
U1380 Q9 Primary active energy,
calibrated at P1
Secondary active
energy
Primary reactive
energy
UCPTvoltSendDelta SNVT_volt_f
UCPTfreqSendDelta SNVT_freq_hz
UCPTConnType conn_type
UCPTptVoltagePrim SNVT_volt_f
UCPTptVoltageSec SNVT_volt_f
UCPTctCurrentPrimary SNVT_amp_f
UCPTctCurrentSec SNVT_amp_f
UCPTenergyAccumMode acc_mode
UCPTenergySendDelta SNVT_elec_whr_f
UCPTpulseRate SNVT_count_f
UCPTpwrSendDelta SNVT_power_f
UCPTpwrFactSendDelta SNVT_pwr_fact_f
CT_NUL = ÷1 —
CT_2WIRE_TRANSFORMER = 20 U1381
CT_2WIRE_DIRECT = 21 U1281
CT_3WIRE_TRANSFORMER = 30 U1387
CT_3WIRE_DIRECT = 31 —
CT_4WIRE_TRANSFORMER = 40 U1389
CT_4WIRE_DIRECT = 41 U1289
ACC_NUL = ÷1
ACC_BIDIR_SIGNED = 0 Difference between energy import
and energy export
ACC_BIDIR_ABS = 1 Energy import and energy export
ACC_UNIDIR_IN = 2 Energy import only: U1281...U1389
ACC_UNIDIR_OUT = 3 Energy export only

6GMC-I Messtechnik GmbH
4.4 Control and Display Functions
The neuron ID appears in an additional menu entry. The service
pin message is transmitted by pressing and holding the key.
Overview of Parameter Setting (excerpt from operating instructions 3-349-275-15 or 3-349-618-15,
expanded to include LON parameter setting)
Send
SerPin
123456.7
1234
kWh
kW
100
Ct
1
Vt
1000
PER
888888.8
8888888.8
kWh
kWh
0200
Ct
U138x with Feature Q1
Current transformer ratio, CT
Left: present value
Right: adjustable
0002
Vt
U138x with Feature Q1
Voltage transformer ratio, vt
Left: present value
Right: adjustable
M
U128X and U138x with Feature V2/V4
Pulse rate, Soutput
Left: present value
Right: adjustable
1000
PER kWh
Auto
Auto
Auto
Parameters can only be changed after enabling .
kWh
S0
M
M
M
m
m
001000.0
0000010.0
kWh
kWh
m
m
Primary energy
Secondary energy
Calibration display
m
Standard
Display test
M
Auto
000 5 . 24
0000Ver
Firmware version
Pulse rate
vt
ct
000230.0
0000V10
V
m00049.90
00F0Hzz00
m m
... m
M M
Auto Auto
Multifunctional display Feature M1 M2 M3
Reactive energy kVArh —• •
Phase voltage U1N, U2N, U3N •—•
Delta voltage U12, U23, U13 •—•
Current I1, I2, I3 •—•
Active power P1, P2, P3, Ptot •—•
Reactive power Q1, Q2, Q3, Qtot •—•
Apparent power S1, S2, S3, Stot •—•
Power factor PF1, PF2, PF3, PFtot •—•
Frequency F •—•
display
S0
AutoAutoAuto Auto Auto
0100 22
1F 9200c
m
Neuron ID
Auto
M
Auto
U128x/U138x with Feature W1
Send service pin:
Message is sent
Node status
m
Setting Range
0.030 ... 3.000 s
0 . 100
seC
S0
Auto
M
U128X and U138x with Feature V2/V4
0 . 100
seC
S0
m
Auto
Key
Auto Automatic scrolling
ct Transformation ratio, current
dt date time
m Press the menu key briefly
M Press and hold the menu key
Q1 Feature: programmable transformation ratio
S0 Pulse rate Soutput
vt Transformation ratio, voltage
V2/V4 Feature: programmable rate
W1 Feature: LON
Special LON parameter

GMC-I Messtechnik GmbH 7
Installing the Meter
The meter can be installed to a LON network by manually
entering the neuron ID, or by triggering the service pin message.
LON Node Status – Node State
The status of the LON node is indicated by means of a symbol to
the right of the neuron ID:
c LON chip is configured (configured online)
n LON chip has no application (no application)
u LON chip is not configured (unconfigured online)
o LON chip is offline (offline)
Bus Symbol
The BUS symbol appears when the LON node in the
meter transmits a data packet. The more data packets
are transmitted, the longer the symbol is displayed.
Wink Command for Identifying the LON Node
When a wink command is received, the neuron ID is displayed
briefly.
4.5 S0 Pulse Rate
cpPulseRate = 1...10 000 corresponds to 1...10 000/kWh with
reference to secondary energy.
Features V1 and V3: Fixed Pulse Rate
Features V2 and V4: Adjustable Pulse Rate
4.6 Error Messages
Report Mask for All Objects
Type CTxVT S0 Pulses cpPulseRate
(permanently set)
U1280 — 1000 / kWh 1000
U1380 Q0 1 1000 / kWh 1000
U1380 Q1 All values
(transformer ratios
are programmable)
1000 / kWh
with reference to
secondary energy
1000
U1380 Q9 1 ... 10
11 ... 100
101 ... 1000
1001 ... 10000
10001 ... 100000
100001 ... 1000000
(fixed transformation ratios)
1000 / kWh
100.0 / kWh
10.00 / kWh
1000 / MWh
100.0 / MWh
10.00 / MWh
with reference to
primary energy
1000
1000
1000
1000
1000
1000
Type CTxVT
cpPulseRate
(adjustable)
S0 Pulses
U1280 — 1 ... 1000 1 ... 1000 / kWh
U1380 Q0 1 1 ... 10 000 1 ... 10 000 / kWh
U1380 Q1 All values
(transformer ratios
are programmable)
1 ... 10 000 1 ... 10 000 / kWh
with reference to secondary
energy
U1380 Q9 1 ... 10
11 ... 100
101 ... 1000
1001 ... 10000
10001 ... 100000
100001 ... 1000000
(fixed transformation ratios)
1 ... 1000
1 ... 1000
1 ... 1000
1 ... 1000
1 ... 1000
1 ... 1000
1 ...1000 / kWh
0.1 ... 100.0 / kWh
0.01 ... 10.00 / kWh
1 ... 1000 / MWh
0.1 ... 100.0 / MWh
0.01 ... 10.00 / MWh
with reference to primary en-
ergy
Message via
LON interface
Cause / Remedy Device Display
Node object
Object Id: 0
No error messages
of its own.
Transmits OR-gated
error messages
from all other
objects.
amMeter
Object Id: 1
over_range A maximum current value has
been exceeded.
E IHi1, E IHi 2, E IHi 3
electrical_fault
Negative power, or current
transformer terminals are
reversed. Check connection.
Phase symbol for the affected
phase blinks.
unable_to_measure
Error in analog component.
Send device to service center.
E AnALog
Device is not calibrated.
Send device to service center.
E CALib
powerMeter
Object Id: 2
No error messages
voltMeter
Object Id: 3
over_range A maximum voltage value has
been exceeded.
E UHi1, E UHi 2, E UHi 3
under_range
Phase failure or, a minimum
voltage value has been fallen
short of. Check connection.
Phase symbol for
affected voltage
disappears, e.g.
phase 2
electrical_fault Incorrect phase sequence.
Check connection.
Phase symbols blink in following
order: ~3 ~2 ~1
unable_to_measure Synchronization to line-
frequency is not possible.
E SYnc
energyMeter
Object Id: 4
Electrical fault
EEPROM for meter reading is
defective, send device to service
center.
E EnErgY
Error Message
Node object amMeter powerMeter voltMeter energyMeter
Object_Id 01234
invalid_id 00000
invalid_request 00000
disabled 00000
out_of_limits 00000
open_circuit 00000
out_of_service 00000
mechanical_fault00000
feedback_failure 00000
over_range 11010
under_range 10010
electrical_fault 1101 1
unable_to_measure 11010
comm_failure 00000
fail_self_test 00000
self_test_in_progress00000
locked_out 00000
manual_control 00000
in_alarm 00000
in_override 00000
report_mask 11111

8GMC-I Messtechnik GmbH
4.7 Configuring the Meter with the LNS Plug-In
and Displaying Current Measured Values
The meter can be fully configured via the LON interface. An LNS
plug-in is available on the Internet to this end. In addition to
LON-specific configuration, Ct, Vt and S0 pulse rate can also be
adjusted.
The plug-in provides a monitor function as well. All important
measured values from the 3-phase system can be displayed as
an overview with this function.
What is an LNS plug-in?
LNS stands for LONWORKS Network Services, and is the network
operating system for LONWORKS. An LNS plug-in makes use of
the functions provided by this operating system, and thus repre-
sents an expansion, or an adaptation, of the functions provided
by an LNS-based installation tool. The user is unable to see
whether any given function is executed by the installation tool
itself, or by a plug-in.
The LNS Plug-In: U1381PlugIn.exe
The plug-in requires an installation tool based on LNS 3.0, for
example LON MAKER from Echelon. It is subdivided into a device
menu, a template line, six tab cards including monitor,
NodeObject, amMeter, voltMeter, powerMeter and energyMeter,
the log window and a status line.
The monitor tab card provides an overview of quantities within the
3-phase system. The rest of the tab cards are allocated to the
meter’s objects and are used to configure them.
4.7.1 Downloading, Unzipping, Installing, Registering and
Starting the LNS-Plug
System Requirements
If the following system requirements are not fulfilled, you’ll need to
update your LON MAKER version first:
Echelon LONMAKER version: 3.13.10
LNS version: 3.08.05
NSS version: 3.08.5
Downloading the LNS Plug-In
The LNS plug-in is available as a zip file at the web address for
meters U1281 through U1389, for example:
www.gossenmetrawatt.com/deutsch/produkte/u1281.htm
Unzipping the Archive and Installing the Plug-In Files
1. Unzip the archive into a newly created directory.
2. Read the included readme file (readme.txt). This file contains
up-to-date installation instructions.
3. Copy the GM directory from Plug-Ins to LonWorks\Plug-Ins.
4. Copy the LcaDevCtrs.ocx file from Bin to LonWorks\bin.
5. Copy the GM directory from Types to LonWorks\types\User.
6. Copy the GM directory from Import to LonWorks\Import.
Registering and Starting the LNS-Plug-In
The following steps must be completed before the plug-in can be
started:
1. Register the plug-in in the Windows registry.
LONMAKER may not be launched.
Start the U1381PlugIn.exe file in the Windows explorer for regis-
tration. Click the Register Plug-in button.
2. Register the plug-in in the installation tool (L ON M AKER in this case).
After starting LON MAKER, the Plug-In Registration window
appears. The plug-in to be registered should appear in the
To Be Registered window. Select Finish, in order to register the
plug-in.
Alternatively, registration can be executed using the
Plug-In Registration tab card after clicking Network Properties in
the LONMAKER menu. Select the plug-in to be registered in the
Not Registered window, and click the Add button. The plug-in
then appears on the To Be Registered window. Click the OK
button.
3. Start the plug-in.
For LON MAKER, click the device to be configured to this end, press
the right mouse key and select Configure. The plug-in is started
and the Monitor tab card appears.

GMC-I Messtechnik GmbH 9
4.7.2 Descriptions of Tab Cards for the LNS Plug-In
Tab Card with Measurement Data Overview – Monitor
In addition to quantities in the 3-phase system, the Monitor tab
card also include meter type and features, manufacturing serial
number, software version and the Location Label assigned by the
user.
Primary values for voltage, current, power and energy are
displayed for transformer meters, and the secondary value is
displayed for active energy as well (Total Active Energy sec).
The log window can be cleared or saved to memory with the help
of the Device menu, and the monitor function can be activated and
deactivated.
The Template line displays the meter’s manufacturer, designation
and program ID.
Errors and parameter changes appear in the Log window along
with a time stamp, and can be saved to a data file.
The Status line displays the device names assigned by the user,
the node status, monitoring, the selected object and the
corresponding status LED.
A magnifying glass appears if monitoring has been activated. One
of the meter’s objects can be selected by clicking the object field,
and the field to the right indicates the respective status.
A green LED indicates that everything is OK, and a red LED
indicates an object error.
NodeObject indicates OR gating for all error messages.
The Node Tab Card – NodeObject
Conditions for Automatic Network Variable Update
The time interval for automatic transmission of node status,
Status Max Send Time, can be selected here.
Location Label
A Location Label with up to 30 characters can be assigned to
each meter. Labels can include, for example, meter number and
installation location.
Template LineDevice Menu
Log Window Status Line Status LED

10 GMC-I Messtechnik GmbH
Current Measurement Tab Card – amMeter
Left-Hand Column
Conditions for Automatic Network Variable Update
Conditions for automatic transmission of network variables are
selected here. A new value is not transmitted until deviation in
comparison with the last value is greater than or equal to
differential current: Amps Send Delta.
If a value does not change, or if it does not exceed the specified
Amps Send Delta threshold, it is transmitted after the Max Send
Time interval has elapsed.
Right-Hand Column
Current Transformer Rating
In the case of transformer meters, current transformer data must
be entered here. The wiring diagram is displayed for the user’s
information.
Voltage Measurement Tab Card – voltMeter
Left-Hand Column
Conditions for Automatic Network Variable Update
Conditions for automatic transmission of network variables are
selected here. A new value is not transmitted until deviation in
comparison with the last value is greater than or equal to
differential voltage: Volts Send Delta, or differential frequency:
Frequency Send Delta .
If a value does not change, or if it does not exceed the specified
Volts Send Delta or Frequency Send Delta threshold, it is
transmitted after the Max Send Time interval has elapsed.
Right-Hand Column
Potential Transformer Rating
In the case of transformer meters, voltage transformer data must
be entered here.

GMC-I Messtechnik GmbH 11
Power Measurement Tab Card – powerMeter
Conditions for Automatic Network Variable Update
Conditions for automatic transmission of network variables are
selected here. A new value is not transmitted until deviation in
comparison with the last value is greater than or equal to
differential power: Power Send Delta, or differential power factor:
Powerfactor Send Delta.
If a value does not change, or if it does not exceed the specified
threshold, it is transmitted after the Max Send Time interval has
elapsed.
Energy Measurement Tab – energyMeter
Left-Hand Column
Conditions for Automatic Network Variable Update
Conditions for automatic transmission of network variables are
selected here. A new value is not transmitted until deviation in
comparison with the last value is greater than or equal to
differential energy: Energy Send Delta.
If a value does not change, or if it does not exceed the specified
Energy Send Delta threshold, it is transmitted each time the
Max Send Time interval has elapsed.
Resetting Energy Values – Resetable Energy
The meter can be reset to zero by clicking the Clear Energy
button. Date and Time are simultaneously transmitted from the
PC to the meter.
Right-Hand Column
Pulse Output
The pulse rate can be selected here for meters with adjustable
pulse rate.
Saved Energy Values – Frozen Energy
The Total Active Energy meter reading is saved to memory along
with Date and Time from the PC by clicking the Freeze Energy
button.

Edited in Germany • Subject to change without notice • PDF version available on the Internet
GMC-I Messtechnik GmbH
Südwestpark 15
90449 Nürnberg • Germany
Phone [phone]
Fax [phone]
E-Mail [email protected]
www.gossenmetrawatt.com
5 Product Support
If required please contact:
GMC-I Messtechnik GmbH
Product Support Hotline
Phone: [phone]
Fax: [phone]
e-mail: [e-mail]