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In Figure 6, an example of a telegram for message format JSON is presented.
6.6.2.4 Scheduled mode
For message formats of type "Scheduled" (Scheduled – Daily redundant and Scheduled – Extended), two types of
messages will be transmitted from the module - a clock message and a data message. The difference between the
two is described in Table 11. A detailed description of the payload of the clock message is provided in Table 12.
Message
Time interval
Clock message
Once per day
Data message
Determined by transmit
interval settings.
DIB
Field
0
Message format
identifier
1
Date/time
The clock message will be transmitted once every day and the data message at least (regulated by transmit interval
parameter) 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 1- 30 minutes. The meter readout for the clock message oc-
curs at a random hour (00:00-23:00) at a random minute in the 35-45 interval. The clock message will be transmitted
immediately after readout.
When using message format Scheduled, the transmit interval cannot not be set to higher than 1440
minutes (24 hours).
Parameter
Transmit interval
6.6.2.5 Daily redundant
The data message of Scheduled mode-daily redundant contains an accumulated daily energy field, which is up-
dated at 24:00 each day. Depending on transmit interval settings and data rate, the field will be included in be-
tween 1-24 data messages per day. This will increase the probability of the value being received. For example, if the
transmit interval is set to "12", the accumulated energy read at 24:00 will be transmitted 12 times during the 24 next
coming hours.
Table 14 provides a detailed description of message format Scheduled-daily redundant.
Size
Data type
1 byte
-
6 bytes
32 bit binary integer
M-Bus type F
Values
60, 120, 180, 240, 360, 480, 720, 1440
Figure 6: JSON message example
Description
The clock message presents the current time of the meter.
It can be used to verify that the clock is correct and has not
drifted more than accepted.
The actual meter data collected from the meter. For more
information.
Description
0xFA (=Clock message)
046Dxxxxxxxx = Valid date/time message
346Dxxxxxxxx = Invalid date/time message
Table 11: Clock and data message
Table 12: Payload, clock message
Unit
Minutes
Table 13: Transmit interval values in Scheduled mode
14
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