User's Manual

Operation: C1SR Version
6-8 CENTRON Meter Technical Reference Guide
Figure 6.4 C1SR FCC Label Location
To retrofit an existing meter with an R300 module, follow "Retrofitting with
Personality Modules" on page 2-3.
R300 IDM
This section describes the Interval Data Messages (IDM) module of the CENTRON
meter. This module provides compatibility with Itron fixed networks (V2.0). The
changes consist of three main areas: addition of IDM, new message formats, new
received energy handling and possibly the measurement of VRMS and
transmission of the VRMS quantity in a second ERT message.
The IDM contains the SCM data. IDM stores 48 intervals of delivered kWh data
with the interval length set to five minutes.
Interval Data Message (IDM) Format
There are two formats for IDM messages. They are associated to two SCM message
types. The first pair is an ERT type 7 SCM and an ERT type 23 IDM message. ERT
type 7 indicates that the device sending this message supports transmitting a single
SCM with an XXXXX.XX format. The type 23 ERT indicates that it is an IDM
message with the format described in <find this: Appendix A, Table 2, ERT Type
23>.
The second pair is an ERT type 8 SCM and an ERT type 24 IDM message. ERT type
8 indicates that the device sending this message supports transmitting three SCM
messages with an XXXXX.XX format. The type 24 ERT indicates that it is an IDM
message with the format described in <find this: Appendix A, Table 3 - ERT Type
24>.
Changes or modifications not expressly approved by Itron could void the user’s authority to
operate the equipment.