Elvaco CMi4110, Руководство пользователя

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CMi4110 User’s Manual English v1.3
CMi4110 User’s Manual English v1.3
page | 13 (27) [2018-06]
V1.3
Table 3 summarizes the transmit interval for different data rates.
Data rate Transmit interval
DR0 60 minutes
DR1 - DR2 30 minutes
DR3 - DR5 15 minutes
Table 3: Data rate and transmit interval
Set the transmit interval manually
If the transmit interval needs to be set to a fixed value, EcoMode can be disabled. Use the Elvaco OTC
App to configure the transmit interval.
If EcoMode has been disabled, guarantees about battery-life no longer apply, even if
EcoMode is activated later on.
Set an upper limit for number of daily telegrams
In some cases, it might be necessary to limit the number of daily telegrams that the module should be
allowed to send. By using the MaxDTx parameter, such a limit can be easily set. For example, by setting
MaxDTx to “24”, no more than 24 telegrams will be transmitted each day (regardless of the data rate).
Table 4 provides a set of examples.
MaxDTx value Maximum transmit interval
1 Once per day
24 Once per hour
48 Once per 30 minutes
96 Once per 15 minutes
Table 4: MaxDTx setting
To achieve a battery life time of 16+1 (storage) years, the MaxDTx parameter needs to be
set to 9 or lower.
6.6 Message formats
CMi4110 has five different message formats: Standard , Compact , JSON , Scheduled-daily redundant and
Scheduled-extended . Each message type will be described in detail in this section. All data messages
from the module will be transmitted on LoRa port 2.
6.6.1 Message structure
All message formats except for JSON are encoded according to M-Bus standard. Each telegram begins
with one byte specifying the message format. Then follows a sequence of data information blocks (DIBs).
The data and structure of the DIBs depends on the message type set. Each DIB contains a data
information field (DIF), a value information field (VIF) and a data field (DATA), where the actual payload is
stored. The structure is illustrated by Figure 4.