Operation: CP1SR Version
24
CENTRON® Polyphase Meter Technical Reference Guide
Standard Consumption Message (SCM)
Utilizing the 96-bit Itron Standard Consumption Message protocol (SCM), the CP1SR
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).
The CP1SR 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 CP1SR 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 7 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 SCM and an ERT type 24 IDM message indicates that the device sending
this message supports transmitting a single SCM with an XXXXX.XX format. The type 24
ERT indicates that it is an IDM message.
The RF Personality Module allows meter data to be collected automatically, helping to save
time, improve reliability, increase accuracy, and ensure data security.
The R300 IDM is a RF Personality Module based on the CENTRON Polyphase solid-state
metering platform. 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 (OMR), 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.
