CMi6110
User’s Manual English
CMi6110 User’s Manual English
page | 23 (42)
[2022-10]
v1.3
Example 2
A device is configured the following way:
•
Message encoding: SenML/CBOR/M-Bus
•
Auto upload order: FIFO
•
Measurement interval: 60 minutes
•
Transmit interval: 60 minutes
•
Transmit offset: 15 minutes
•
Transmit delay: 30 minutes
•
Maximum uploads per transmission: 4
•
Upload maximum age 72h
•
Device max payload size: 12 (readouts per telegram)
A network issue caused the module to be offline for 5 days, while still reading and storing measurement
data. When the device manages to go online the following scenario takes place.
•
The device will start by transmitting measurement data that is 3 days old (FIFO order)
•
The device will send 4 measurement telegrams per hour, at a randomly chosen time between
minute 15 and 45
•
Each telegram contains 12 meter readouts, totaling 4 x 12 = 48 readouts per transmission
•
The device will take approximately 2 hours to “catch up” and start sending one measurement per
hour
7.4
Meter data transmission
CMi6110 sends meter data messages according to it
’s transmit interval settings. Meter read out is always
related to meter’s clock at time 00:00:00. Transmission time is randomized between read outs.
The user can customize the data sent from the module by configuring
message format
and
encoding
of
the telegram.
Transmitting and interpreting meter data from CMi6110 is flexible and the user can choose among three
different encoding techniques, and two message formats. Chosen message format dictates what data is
sent, while the encoding technique determines how that data in should be interpreted. In the following
paragraphs, the available message formats and encoding techniques are described in detail.
7.4.1 Message formats
CMi6110 has two different message formats, Standard and Extended.
By selecting message format, the user can configure what meter registers that will be included in the
telegram. In message format Standard, all meter registers in Table 4 are included in the telegram. In
message format Extended, all meter registers of Table 4 and Table 5 will be included in the message.
Field
Description
Energy
Energy consumption (kWh)
Mapped to OBIS 6.8
Volume
Volume (m
3
)
Mapped to OBIS 6.26
Power
Power (kW)
Mapped to OBIS 6.4
Flow
Flow (m
3
/h)
Mapped to OBIS 6.27
