Energy Measurement and Management - Iskraemeco UK
Energy Measurement and Management - Iskraemeco UK
Energy Measurement and Management - Iskraemeco UK
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<strong>Energy</strong> <strong>Measurement</strong> <strong>and</strong> <strong>Management</strong><br />
P2LPC data concentrator is intended<br />
for automatic reading of data from<br />
Mx3y1 family of electricity meters in<br />
the AMM-system. The communication<br />
with electricity meters runs<br />
through low voltage network (DLC)<br />
in accordance with the communication<br />
protocol DLMS/COSEM. P2LPC<br />
also allows the reading of electricity<br />
meters (Mx372, MT83x) via the<br />
RS485 communication interface.<br />
P2LPC is based on single-board<br />
computer (SBC), which operates on<br />
Microsoft Windows CE operating<br />
system. Application in P2LPC is<br />
responsible for searching, reading<br />
<strong>and</strong> maintaining two-way communication<br />
with electricity meters, to<br />
store obtained data in internal memory<br />
as well as for data transfer to an<br />
assembly center. For communication<br />
with the center for data collection<br />
there are different communication<br />
paths available - GSM, GPRS<br />
<strong>and</strong> Ethernet, using st<strong>and</strong>ard<br />
Internet protocols - PPP, TCP/IP,<br />
FTP <strong>and</strong> WebService.<br />
P2LPC<br />
Data concentrator for AMM-systems<br />
Operating System<br />
WEB<br />
DLC modem for communication with the<br />
meters<br />
CENELEC frequency b<strong>and</strong> A<br />
(from 9 to 95 kHz)<br />
Communication protocol for communicating<br />
with the meters<br />
Integrated GSM / GPRS modem for two<br />
frequencies<br />
File transfer protocol to the center<br />
Data transfer <strong>and</strong> meter management with<br />
WEB-stations<br />
■ Communication with the meters over the DLC network<br />
■ »Plug <strong>and</strong> Play« – automatic search for new meters, log into the system <strong>and</strong> logout<br />
from it<br />
■ Saving Data to indelible memory<br />
■ Communication with the center via GSM, GPRS <strong>and</strong> Ethernet communications<br />
■ DLMS/COSEM - protocol for communication with the meters<br />
■ St<strong>and</strong>ard Internet protocols (PPP, TCP/IP, FTP <strong>and</strong> WebService) for communication<br />
with the center<br />
■ Microsoft Windows CE operating system<br />
■ Remote control over P2LPC <strong>and</strong> its operation management
P2LPC<br />
CONCENTRATORS ESSENTIAL FUNCTIONS<br />
P2LPC application runs on a single-board computer (SBC) on Microsoft Windows<br />
CE as multithreaded applications, while threads can be implemented simultaneously.<br />
Each of them is responsible for its function. Functions are as follows:<br />
DLC-network management: Search, installation <strong>and</strong> deinstallation of meters.<br />
Verification of quality of communication between P2LPC <strong>and</strong> meters. When there<br />
are poor conditions in the DLC-network, meters can be automatically placed in<br />
iteration (repeater) mode (up to 7 repetitions). This ensures reliable data transfer<br />
to remote meters, to which direct communication cannot be established, <strong>and</strong><br />
also from them. DLC address area allows addressing of up to 3072 meters.<br />
Meters reading: This is a periodic task with adjustable timetable that may consist<br />
of several schedules. Each of them has its own priority. Results from the meters<br />
are stored in result files separately for each meter <strong>and</strong> for each month.<br />
Communication with the meters is in accordance with the DLMS / COSEM protocol.<br />
A simplified architecture of the OSI model is used, which is defined in the<br />
st<strong>and</strong>ards IEC 62056-46 (DATA LINK LAYER USING HDLC-PROTOCOL) <strong>and</strong> IEC<br />
62056-52. On a physical level P2LPC is using a DLC-modem. The software takes<br />
care of sending <strong>and</strong> receiving of data via the DLC-modem that operates transparently<br />
to the higher level of communication. On the data level HDLC is using<br />
DLMS protocol. On the aplication level the COSEM protocol is implemented.<br />
Supervision <strong>and</strong> management of meters: With P2LPC it is possible to remotely<br />
change the configuration of the meter, a tariff schedule, turning the user on or<br />
off, as well as implementation of other operations on dem<strong>and</strong> in real time.<br />
Storage of data: For storage of data Microsoft Windows CE with protected file system<br />
is used. Every month a new result file is created for each meter. There are<br />
three types of files containing different types of data: the state of registries, the<br />
state in the measurement period <strong>and</strong> events <strong>and</strong> statuses. All files are stored in a<br />
local indelible memory. To save memory space <strong>and</strong> minimizing the amount of<br />
transferred data all of these files can be compressed. The size of files stored in<br />
this form for one meter per month is about 10 kB. There is 45 MB of memory<br />
reserved for storing result files. Deleting of older files is automated. The frequency<br />
is set in the parameters of P2LPC.<br />
Communication with the billing center: It is possible using the modem or Ethernet<br />
connection. For the maintenance <strong>and</strong> control of the modem communication the<br />
Remote Access Server (RAS) <strong>and</strong> PPP (RFC 1661) protocols are used. When<br />
communicating with the center over GPRS, the P2LPC is establishing <strong>and</strong> supervising<br />
the connection with GPRS network. For data transfer the TCP/IP protocol<br />
is used. The software package includes several auxiliary applications that take<br />
care of the transfer of metering data <strong>and</strong> files - FTP <strong>and</strong> WebService, SNMP for<br />
monitoring <strong>and</strong> management, <strong>and</strong> NTP for the control of time functions. For the<br />
transfer <strong>and</strong> storage of data in billing database the <strong>Iskraemeco</strong> SEP2WSystem<br />
software is used. The use of open protocol st<strong>and</strong>ards enables easy installation<br />
into other systems.<br />
Maintenance, changing the settings <strong>and</strong> control over the operation can take place locally<br />
through the Ethernet interface or remotely through already mentioned communication<br />
channels. There are various types of information available on the P2LPC such as the list<br />
of installed meters, meters reading schedules, currently running operations <strong>and</strong> data<br />
files. From the comm<strong>and</strong> line it is possible to implement certain comm<strong>and</strong>s such as<br />
search for new meters in the system, deinstallation of meters, starting meters reading<br />
schedules, etc. Configuration files can be browsed, such as files for monitoring the<br />
system operation, from which we can see the number of connected meters to the P2LPC,<br />
the time-tag of meter installation <strong>and</strong> the current quality of communication. There are also<br />
different levels of records to a log-file, through which the functioning of the concentrator<br />
can be analyzed <strong>and</strong> eventually optimized.<br />
DLC-MODEM<br />
The integrated DLC-modem takes care of the data transfer between the concentrator<br />
<strong>and</strong> meter through low-voltage network. The communication is serial, asynchronous,<br />
with speeds of up to 1200 bit/s. The actual transfer speed through low-voltage<br />
network depends primarily on the current situation of the network. Sending <strong>and</strong><br />
receiving of data are controlled by modem application; broadcast <strong>and</strong> reception of<br />
data are possible on all three phases.<br />
Type of modulation<br />
»Spread FSK« (S-FSK) with two carriers<br />
(Typically 93,600 Hz <strong>and</strong> 83,200 Hz – adjustment to user preferences is possible)<br />
Transfer speed<br />
1200 bps through the network (in poor conditions, 300 bps)<br />
The level of transmitted signal<br />
It operates in accordance with EN 50065 st<strong>and</strong>ard - broadb<strong>and</strong> modulation<br />
• 134 dB/µV meters – single-phase connection<br />
• 128 dB/µV meters – three-phase connection<br />
• P2LPC-concentrator 128 dB/µV – three-phase connection<br />
The way of connection<br />
Capacitive, galvanic separation<br />
Type of communication<br />
Partial two-way transfer<br />
Communication structure<br />
Master (P2LPC) – Slave (meter)<br />
Repeater mode<br />
Self-adaptive, based on the criteria function (the signal - noise ratio on both carriers)<br />
Rated voltage Un . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3x230/400 V, 3x400 V<br />
Operating range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.8 Un ... 1,5 Un<br />
Rated frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50Hz<br />
Operating temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . .-20 °C ... +60 °C<br />
Storage temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40 °C ... +80 °C<br />
Own consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 W max.<br />
Low voltage<br />
network<br />
Supply unit<br />
Single<br />
Board<br />
Computer<br />
Windows CE<br />
Eternet<br />
RS232<br />
LAN adapter<br />
RS485<br />
LAN<br />
DLC modem<br />
RS232<br />
RS232<br />
GSM modem<br />
GSM / GPRS<br />
network<br />
722.999.186 1104/10<br />
Owing to periodical improvements of our products the supplied products may differ in some<br />
details from the data stated in the prospectus material.<br />
<strong>Iskraemeco</strong> (<strong>UK</strong>) Ltd<br />
Building 1010, Cambourne Business Park<br />
Cambourne, Cambridge, CB23 6DP<br />
Tel.: +44(0)1223 597912, e-mail: sales@iskraemeco.co.uk, http://www.iskraemeco.co.uk<br />
Published by <strong>Iskraemeco</strong>. Data subject to change without notice.