CMi413
0 User’s Manual English
CMi413
0 User’s Manual English
page | 16 (25)
[2020-06]
V1.1
Table 8: Clock message and data message
DIB
Field
Size
Data type
Description
0
Message
format
identifier
1 byte
-
0xFA (=Clock message)
1
Date/time
6 bytes
32 bit binary integer
M-Bus type F
046Dxxxxxx = Valid date/time message
346Dxxxxxx = Invalid date/time message
Table 9: Payload, clock message
The clock message will be transmitted once every day and the data message at least (regulated by
transmit interval parameter or EcoMode) once every day. The transmit interval can only be set the values
listed in Table 10.
Note that although the meter readout will occur on top-of-the-hour, the data message will not necessarily
be transmitted at that exact time. The LoRa transmission will occur after a random delay of 0-15 minutes
to decrease the risk of collisions. The readout for the clock message occurs at a random hour (00:00-
23:00) at a random minute in the 35-45 interval and will be transmitted immediately after the readout.
When using message format S
cheduled
, the transmit interval cannot not be set to higher
than 1440 minutes.
Parameter
Values
Unit
Transmit interval
60, 120, 180, 240, 360, 480, 720, 1440
Minutes
Table 10: Transmit interval options for Scheduled message formats.
Scheduled- daily redundant
The data message of
Scheduled mode-daily redundant
contains an accumulated daily energy field, which
is updated at 24:00 each day. In other words, depending on transmit interval settings and data rate, the
field will be included in between 1-24 telegrams per day. This will increase the probability of the value
being received. For example, if the transmit interval is set to “2”, the accumulated energy read at 24:00
will be transmitted 12 times during the 24 next coming hours (every 2
nd
hour).
Figure 8: Structure, message format Scheduled
– daily redundant
DIB
Field
Size
Data type
Description
0
Message
format
identifier
1 byte
-
0x12 (Scheduled
– daily redundant)
1
Energy
6 bytes
INT32
Energy consumption (Wh, J)
0403xxxxxxxx = xxxxxxxx Wh
0404xxxxxxxx = xxxxxxxx * 10 Wh
0405xxxxxxxx = xxxxxxxx * 100 Wh
0406xxxxxxxx = xxxxxxxx kWh
0407xxxxxxxx = xxxxxxxx * 10 kWh
040Exxxxxxxx = xxxxxxxx MJ
040Fxxxxxxxx = xxxxxxxx * 10 MJ
