the other common, viable and conventional communication systems
cannot afford us a real time connection. For e.g., in the PSTN
line connection, we need to dial the number first (called server
calling), establish a connection and then communicate. Since
this method is not always online this is not suitable for real
time applications. On the other hand, GPRS system is an
Always-online system and client calling system (as against
server calling system). The meters are always online and
connected to the server, and can be communicated with at any
time and in real time. Meters can transmit data to the BCS (Base
Computer Station) automatically. In case of errors in any meter,
an alarm can be raised by the meter to the BCS automatically.
The meters find the BCS by recording an IP address of the BCS in
its SIM card (quite similar to an address used to access a
website on the Internet). The GPRS service provider (typically
Mobile Phone Service Provider) will charge on the quantum of
data transfer and not on connection time. As of today, the GPRS
system can be considered the most advanced, fastest and cheapest
system for remote monitoring of HT meters.
FD131 is an advanced three-phase multi-function energy meter
with GPRS communication. This meter is based on the three-phase
multi-function metering IC PL3223 and multi-function metering
SoC (System on Chip) PL3201 design of which we possess the
Intellectual Property Rights.
one---Always online: keep sending pulse signal to ensure online
24hours.he pulse signal interval can be set by BCS depending on
the condition of communication.
installation of GPRS meter in a building.
the communication lose, the GPRS meter will keep trying to
reconnect automatically. If communication keeping failed for
some time( preset the threshold), then the meter will only try
to reconnect once a day. At the same time, the meter will always
wait for wake up by BCS.