ITRON Centron, Техническое справочное руководство

Страница: 38 / 100

Operation: C1SR Version
28 CENTRON® Meter Technical Reference Guide
Standard Consumption Message (SCM)
Utilizing the 96-bit Itron® Standard Consumption Message protocol (SCM), the C1SR
provides the energy (kWh) consumption, module ID number, tamper indications, meter
type, and error checking information in each radio frequency transmission. Within the 96-bit
SCM, 26 bits are allocated to the module ID number for meter identification (also referred
to as ERT ID number). As of October 15, 1999, all CENTRON C1SR meters utilize 26-bit
identification numbers.
The C1SR uses frequency hopping and transmits within the unlicensed 910 to 920 MHz
band on an average of once per second. In order to avoid interference from other devices,
the transmission frequencies and time interval between transmission cycles are completely
random in nature.
The C1SR is factory programmed with tuning information, module ID, tamper indicators
(ITPR and RTPR), meter type, energy consumption, and scaling factor. The program and all
register information are stored in non-volatile memory in the event of a power outage. Upon
power restoration, all of the information in the non-volatile memory is restored to the
appropriate registers.
The ERT type 4 message indicates that the device is sending this message supports
transmitting a single SCM in the XXXXX format.
Interval Data Message (IDM)
The ERT type 7 message transmits one SCM and one IDM type 23 message. The type 23
ERT indicates the transmission of a single IDM message in the XXXXX.XX format.
The RF Personality Module allows meter data to be collected automatically, helping to save
time, improve reliability, increase accuracy, and ensure data security. Kilowatt-hours and
tamper data are reported through RF transmissions. The R300 IDM module provides both
baseline and advanced data collection functionality, including interval data recording and
enhanced tamper reporting capability. The R300 IDM delivers the Standard Consumption
Message to any of Itron’s radio-based data collection technologies, including handheld
computers, a vehicle-based Mobile AMR unit such as the Mobile Collector, or a network
data collection solution such as the Itron Fixed Network or MicroNetwork. In addition, the
R300 IDM is also capable of delivering the Interval Data Message to the Itron Fixed
Network AMR system to calculate ANSI standard demand, time-of-use, and load profiling
information.
Physical Description (C1SR)
The C1SR personality module is constructed of a flame retardant printed circuit board
material which supports the discrete, surface-mounted, and integrated circuit components. A
microstrip etched on the circuit board serves as the RF antenna. The C1SR personality
module easily snaps into the meter module mounting bracket. This module is then
electronically attached to the metrology board via a board to board connector.