Elvaco CMi4170 User manual

CMi4170 User’s Manual English
CMi4170
User’s Manual
English
V 1.1

CMi4170 User’s Manual English
CMi4170 User’s Manual English
Page 2
[2020-10]
Contents
1DOCUMENT NOTES .....................................................................................................3
1.1 COPYRIGHT AND TRADEMARK.........................................................................................3
1.2 CONTACTS..................................................................................................................... 3
2IMPORTANT USAGE AND SAFETY INFORMATION...................................................4
3USING THIS MANUAL ..................................................................................................5
3.1 PURPOSE AND AUDIENCE ............................................................................................... 5
3.2 ONLINE RESOURCES ......................................................................................................5
3.3 SYMBOLS.......................................................................................................................5
4INTRODUCTION............................................................................................................6
4.1 PURPOSE....................................................................................................................... 6
4.2 APPLICATION DESCRIPTION.............................................................................................6
4.3 PRODUCT FEATURES......................................................................................................6
4.4 METER COMPATIBILITY...................................................................................................6
5GETTING STARTED......................................................................................................7
5.1 PURPOSE....................................................................................................................... 7
5.2 PRODUCT SPECIFICATION...............................................................................................7
5.3 MOUNT AND START-UP THE DEVICE.................................................................................8
5.3.1 Mounting...................................................................................................................... 8
5.3.2 Network preparation.................................................................................................... 8
5.3.3 Activation and LED indications.................................................................................... 9
5.3.4 Reboot/Switch off module ......................................................................................... 10
6ADMINISTRATION REFERENCE................................................................................11
6.1 PURPOSE..................................................................................................................... 11
6.2 SECURITY AND ACCESS CONTROL................................................................................. 11
6.3 CONFIGURATION OPTIONS ............................................................................................11
6.3.1 Downlink.................................................................................................................... 13
6.4 ADAPTIVE DATA RATE (ADR)........................................................................................14
6.5 TRANSMIT INTERVAL.....................................................................................................14
6.5.1 EcoMode................................................................................................................... 14
6.6 MESSAGE FORMATS..................................................................................................... 15
6.6.1 Message structure..................................................................................................... 15
6.6.2 Structure and payload............................................................................................... 16
6.6.3 Meter communication error message........................................................................ 24
7TECHNICAL SPECIFICATIONS..................................................................................25
8TYPE APPROVALS.....................................................................................................26
9DOCUMENT HISTORY................................................................................................27
9.1 VERSIONS....................................................................................................................27
10 REFERENCES.............................................................................................................28
10.1 TERMS AND ABBREVIATIONS .........................................................................................28
10.2 NUMBER REPRESENTATION ..........................................................................................28
10.3 EUROPEAN STANDARDS............................................................................................... 28

CMi4170 User’s Manual English
CMi4170 User’s Manual English
Page 3
[2020-10]
1 Document notes
All information in this manual, including product data, diagrams, charts, etc. represents information on
products at the time of publication, and is subject to change without prior notice due to product
improvements or other reasons. It is recommended that customers contact Elvaco AB for the latest
product information before purchasing a CMi Series product.
The documentation and product are provided on an “as is” basis only and may contain deficiencies or
inadequacies. Elvaco AB takes no responsibility for damages, liabilities, or other losses by using this
product.
1.1 Copyright and trademark
© 2020, Elvaco AB. All rights reserved. No part of the contents of this manual may be transmitted or
reproduced in any form by any means without the written permission of Elvaco AB. Printed in Sweden.
CMi Series is a trademark of Elvaco AB, Sweden.
1.2 Contacts
Elvaco AB Headquarter
Kabelgatan 2T
434 37 Kungsbacka
SWEDEN
Phone: [phone]
E-Mail: [email protected]
Elvaco AB Technical Support
Phone: [phone]
E-Mail: [e-mail]
Online: http://www.elvaco.com

CMi4170 User’s Manual English
CMi4170 User’s Manual English
Page 4
[2020-10]
2 Important usage and safety information
The following safety precautions must be observed during all phases of the operation, usage, service or
repair of any CMi Series product. Users of the product are advised to convey the information to users and
operating personnel and to incorporate these guidelines into all manuals supplied with the product.
Failure to comply with these precautions violates safety standards of design, manufacture and intended
use of the product. Elvaco AB assumes no liability for customer’s failure to comply with these
precautions.
CMi4170 receives and transmits radio frequency energy while switched on. Remember that interference
can occur if the product is used close to TV sets, radios, computers, or inadequately shielded equipment.
Follow any special regulations and always switch off the product wherever forbidden, or when you
suspect that it may cause interference or danger.

CMi4170 User’s Manual English
CMi4170 User’s Manual English
Page 5
[2020-10]
3 Using this manual
3.1 Purpose and audience
This manual provides all information needed to mount, deploy, and configure CMi4170 and targets
installers and system integrators.
3.2 Online resources
To download the latest version of this user’s manual, or to find information in other languages, please
visit http://www.elvaco.com/.
3.3 Symbols
The following symbols are used throughout the manual to emphasize important information and useful
tips:
The Note symbol is used to mark information that is important to take into consideration for
safety reasons or to assure correct operation of the meter connectivity module.
The Tip symbol is used to mark information intended to help you get the most out of your
product. It might for example be used to highlight a possible customization option related to the
current section.
Table 1 provides information on how the product should be used.
Symbol
Description
Waste electrical products should not be disposed of with household waste. Please recycle
where facilities exist. Contact your Local Authority for recycling advise.
Electrostatic-sensitive device. Please observe the necessary ESD protective measures when
installing the module.
Table 1: Usage information

CMi4170 User’s Manual English
CMi4170 User’s Manual English
Page 6
[2020-10]
4 Introduction
4.1 Purpose
This chapter provides a general description of CMi4170. In the next-coming sections you will learn more
about possible applications for the product and how CMi4170 can be combined with other products to
build versatile solutions.
4.2 Application description
CMi4170 is a meter connectivity module for an Engelmann Sensostar S3/S3C heating/cooling meter to
deliver meter data to a receiving (application) server over a LoRaWAN network. Meter data is securely
transmitted, using LoRaWAN end-to-end security scheme.
4.3 Product features
CMi4170 offers a combination of battery operation with long lifetime and a versatile application through its
many configuration options. Key features of the module include:
•Extensive battery lifetime
The module’s EcoMode feature enables the module to achieve a battery-lifetime of 6+1 or 10+1
years with a new internal meter battery (“+1”refer to 1 year of storage)
•Easy start-up
As soon as the meter connectivity module is mounted in the meter and activated, it will join the
LoRaWAN network.
•Easy and secure commissioning
With Elvaco’s One-Touch Commissioning (OTC), deployment, configuration and key transferring
can be performed in a secure and flexible way.
•Unique and flexible message formats
CMi4170 has several different message formats, this makes it easy to customize the payload to
the unique demands of each application.
4.4 Meter Compatibility
CMi4170 is compatible with Engelmann Sensostar meters with a compatible firmware version. If CMi4170
is mounted in an incompatible meter, this is indicated in the OTC App. Table 2 shows the minimum
firmware versions required.
The meter’s firmware version can be shown in the meter’s display, for further information please refer to
the meter’s manual.
Meter
Minimum firmware version
Engelmann SensoStar S3
103/14
Engelmann SensoStar S3C
100/5
Table 2: CMi4170 - Meter firmware compatibility

CMi4170 User’s Manual English
CMi4170 User’s Manual English
Page 7
[2020-10]
5 Getting started
5.1 Purpose
This chapter provides instructions on how to get started with CMi4170. After reading and carefully
following each step of this chapter, your meter connectivity module should be mounted and connected to
the LoRaWAN network.
5.2 Product specification
(1) Green LED
(2) Red LED
(3) Interface Connector
(4) Push Button
(5) Pulse Input
(6) LoRaWAN Antenna
Note: The NFC antenna is integrated
in the edge of the PCB.
Figure 1. CMi4170 Product Specification

CMi4170 User’s Manual English
CMi4170 User’s Manual English
Page 8
[2020-10]
5.3 Mount and start-up the device
5.3.1 Mounting
Mount the CMi4170 in the module slot of Engelmann, see Figure 2 below.
•Please make sure that the module’s push button (2) is facing upwards.
•Please make sure that Interface connector of the meter (1) fits the Interface connector of the
module (3).
Figure 2: Engelmann Sensostar S3 meter (left) and CMi4170 module (right)
5.3.2 Network preparation
For the module to connect to the LoRaWAN network, it needs to be registered in the network server. The
following information needs to be added in the network server, depending on activation type:
Over-the-air activation (OTAA): Device EUI, Application key and Join EUI
Activation by personality (ABP): Application Session key, Network Session key and Device address
Elvaco strongly recommends using Over-the-air activation (OTAA) to facilitate deployment
and minimize the risk of duplicated keys.

CMi4170 User’s Manual English
CMi4170 User’s Manual English
Page 9
[2020-10]
5.3.3 Activation and LED indications
Module activation
By default, CMi4170 is set to passive mode, which means no messages will be transmitted from the
module until it is activated. The module can be activated in one of the following ways:
a) By using the Elvaco OTC App: Open the Elvaco OTC app, which is available in Google Play.
1. Scan the module, make sure NFC is activated on the phone.
2. In Elvaco OTC App, go to the “APPLY” tab,
3. Set “Power mode”to “Active”
4. Click “APPLY”in the bottom of the screen
5. Scan the module to apply new settings.
To verify that the module has been activated, go to the “INSPECT” tab, scan the module, and
make sure that “Power mode” is set to “Active”.
Note that it is possible to create a configuration profile to apply a preconfigured setting to
multiple devices, for further information please refer to the OTC app documentation,
available on the Elvaco website.
b) By using the module push button: Press down the push button of the module for at least five
seconds until the green LED lights up.
c) By using the Engelmann optical interface configuration tool “Device Monitor”.For further
information please refer to Engelmann documentation.
d) By using the meter menu. For further information please refer to Engelmann documentation.
Network join
When activated, CMi4170 will attempt to join the LoRaWAN network by the following sequence:
1. Red LED –One flash
2. Green and Red LED –Lights simultaneously up for 1 second
3. Green LED –Several flashes while trying to connect to the LoRaWAN network
4. Green LED –Lights up for 8 seconds when module succeeds in joining the LoRaWAN network
Network join sequence is illustrated in Figure 3.
Figure 3: Network join sequence, Green and red LED indication
The time for CMi4170 to join the LoRaWAN network join may differ depending on network conditions.
If the module fails to join the LoRaWAN network, it will retry until it succeeds. The time between each
attempt will increase successively, to a minimum of once every day. A new join attempt cycle can be
manually started at any time by rebooting the module (see section 5.3.4 Reboot/Switch off module) or by
deactivating and activating the module using the Elvaco OTC App.
Once the module has joined the LoRaWAN network, meter data will initially be transmitted from the
module every minute (regardless of transmit interval settings) to set the right data rate. After three
minutes of calibration, the module will start to deliver meter data using its configured settings.

CMi4170 User’s Manual English
CMi4170 User’s Manual English
Page 10
[2020-10]
Follow below steps to verify that the module is communicating with the meter and is connected to the
LoRaWAN network:
1. Open the Elvaco OTC App and go to “INSPECT” tab
2. Scan the module
3. Check if “Meter com” is set to “OK” and “Network joined”is set to “Yes”
5.3.4 Reboot/Switch off module
Reboot
Press and hold the module’s push button for 5-15 seconds. Release the push button when the green LED
is lit.
Switch Off
Press and hold the module’s push button for 15-20 seconds. Make sure to release the button when the
red LED is lit. If releasing the push button after more than 20 seconds, the module will not switch off.
Figure 4: Reboot/switch off module

CMi4170 User’s Manual English
CMi4170 User’s Manual English
Page 11
[2020-10]
6 Administration reference
6.1 Purpose
This chapter contains detailed information about configuring options and the different message formats of
CMi4170.
6.2 Security and access control
CMi4170 has a “configuration lock”feature, which prevents unauthorized access to the module. When
“configuration lock”has been enabled, a Product Access Key will be needed to configure the device. For
more information about security and access control, please refer to the One-touch commissioning (OTC)
documentation, available on the Elvaco website.
6.3 Configuration options
CMi4170 is configured via the Elvaco OTC app. It uses NFC to transfer settings to the module.
Downlink may also be used to for some configurations, see section 6.3.1 Downlink for more information.
CMi4170 can also be configured using Engelmann optical interface configuration tool “Device Monitor”,
for further information please refer to Engelmann documentation.
Please note that the Elvaco OTC App is compatible with Android phones with Android 5.0
or later.
Table 3 provides a summary of all CMi4170 parameters and settings.
Field name
(Abbr.)
Description
Default value
Elvaco
OTC App
Locked device &
correct Product
Access Key
or
Open device
Elvaco
OTC App
No
Product
Access
Key
Downlink
Device Settings
Meter ID
Meter identification number
of the meter. Not
configurable.
N/A
Readable
Readable
N/A
Power mode
Used to activate/deactivate
the module.
Passive
Readable /
Writeable
Readable
N/A
EcoMode
When activated, a
minimum battery-life of 6+1
or 10+1 years depending
on the configuration) can
be achieved by the
module.
10 years
Readable /
Writeable
Readable
Writeable
Message
format
The message format
determines the meter data
included in the telegram
from the module.
0x24
(Standard)
Readable /
Writeable
Readable
Writeable

CMi4170 User’s Manual English
CMi4170 User’s Manual English
Page 12
[2020-10]
Transmit
interval
Sets the number of
minutes between each
transmission from the
module.
60 minutes
Readable /
Writeable
Readable
Writeable
Date & Time
Date and time of the meter.
N/A
Readable /
Writeable
Readable
N/A
Set Time
Relative
Adjusts the time of the
meter relative to the
current time.
N/A
N/A
N/A
Writeable
Set absolute
time
Sets the time of the meter
Writeable
N/A
N/A
N/A
Configuration
Lock
Locks the module to
prevent unauthorized
access.
Open
Readable /
Writeable
Readable
Writeable
Pulse input
selection
Select which of the three
pulse inputs to include
when using the Engelmann
message format. One or
more can be selected.
0x00 (None)
Readable /
Writeable
Readable
Writeable
LoRaWAN Settings
Device EUI
Unique module
identification number. Not
configurable.
Device-unique 64-
bit number
Readable
Readable
N/A
Activation type
Sets the way the device
joins the LoRaWAN
network.
OTAA
Readable /
Writeable
Readable
Writeable
Network join
Used to display whether
the module has joined the
LoRaWAN network
N/A
Readable
Readable
N/A
Join EUI
Application identifier that
determines where data
ends up.
94193A030C000001
Readable /
Writeable
Readable
Writeable
Device
address
32-bit address used by the
device to identify itself on
the LoRaWAN network.
N/A
Readable /
Writeable
Readable
Writeable
Current data
rate
The current data rate used
for the module.
N/A
Readable
Readable
N/A
Table 3: Configuration options

CMi4170 User’s Manual English
CMi4170 User’s Manual English
Page 13
[2020-10]
6.3.1 Downlink
CMi4170 supports configuration via downlink, i.e. sending commands to an end-device via the LoRaWAN
network. Note that this feature should only be used sparingly due to bandwidth consideration.
Communication via downlink can only be made in a short window after an uplink transmission from
module to server. Therefore, time-critical communication should not be performed over downlink.
Downlink are sent on port 2, structured according to the following format: “0x00” "TLV" "Number of bytes
in configuration" "Configuration". For a complete description of all available downlink commands, see
Table 4.
Field name
TLV
Number of
bytes in
configuration
Configuration
Example
Configuration
lock
0x05
0x01
0x00 = Locked
0x01 = Open
0x00050101
(Enables configuration
lock)
Transmit interval
0x06
0x02
0xNumber of minutes
between transmission
(lsByte -> msByte)
0x0006021E00
(Sets the Tx interval to 30
minutes)
Message format
0x07
0x01
0x24 = Standard
0x25 = Compact
0x26 = JSON
0x27 = Scheduled-daily
redundant
0x28 = Scheduled -
Extended
0x29 = Combined
heat/cooling
0x2C = Engelmann
0x0007010XX
(Sets the message format
to compact)
EcoMode
0x0F
0x01
0x00 = Disable EcoMode
0x01 = Enable EcoMode,
10 years
0x02 = Enable EcoMode,
6 years
0x000F0100
(Disables EcoMode)
Set Time
Relative
0x13
0x02
0xNumber of minutes*
(lsByte -> msByte)
*Negative numbers
supported.
0x0013020F00
(Adds 15 minutes to the
current time)
0x0013020F80
(Subtracts 15 minutes from
the current time)
UTC offset
0x17
0x02
0xNumber of minutes*
(lsByte -> msByte)
*Negative numbers
supported.
0x0017023C00 (Sets the
UTC offset to +60 minutes)
0x0017023C80 (Sets the
UTC offset to -60 minutes)
Reboot
0x22
0x02
0x9E75 is used to reboot
device
0x0022029E75
(Reboots the device)
Pulse input
selection
0x1D
0x01
Bit flags for selecting
which pulse inputs are to
be included in the
Engelmann message
format.
0x001D0101
(Only input 1)
0x001D0107
(Input 1, 2 & 3)

CMi4170 User’s Manual English
CMi4170 User’s Manual English
Page 14
[2020-10]
0 = disabled, 1 = enabled
Bit 0: Input 1
Bit 1: Input 2
Bit 2: Input 3
Bits 3-7 are reserved and
shall be set to 0.
Table 4: Downlink commands
6.4 Adaptive data rate (ADR)
CMi4170 uses Adaptive Data Rate (ADR), part of the LoRaWAN standard, where the network server
determines the optimal rate of communication for the module based on current signal conditions. In best
case, the module will use its highest data rate (DR5) in order to be as energy efficient as possible. When
signal conditions are poor, the network server will incrementally lower the data rate until it is able to
receive the message. When the data rate is low, the energy consumption per telegram will increase.
6.5 Transmit interval
The transmit interval is used to set how frequently the module should transmit data on the LoRaWAN
network. The parameter can be set to a value between 5 and 1440 minutes (i.e. 5-minute to daily values).
6.5.1 EcoMode
When EcoMode is active, the module has a battery lifetime of 6+1 or 10+1 years, depending on what
EcoMode alternative is set. EcoMode setting is ignored when PSU (external power supply Engelmann) is
connected. The module can achieve battery life of 6+1 or 10+1 years by using a table of allowed transmit
intervals settings for each data rate.
When radio conditions are poor (and data rate is low), the module will send data less frequently to
conserve battery-life. When signal conditions are good, the module will send data more frequently. When
EcoMode is enabled, the module will continuously check if the set transmit interval is “allowed” by the
EcoMode table. If a lower transmit interval is needed for the specific data rate to achieve 6+1 or 10+1
years of battery life, the module will adjust the parameter accordingly. See Table 5 and Table 6 for the
transmit interval allowed in each data rate.
Please note that anticipated battery lifetime cannot be assured if:
•EcoMode is disabled (Even if EcoMode is activated later)
•Changing from 6+1 to 10+1 years battery lifetime in EcoMode
When using the “Engelmann” message format the transmit interval is doubled to
compensate for the additional telegrams transmitted in this message format, with the
exception of DR0 in 10 year EcoMode where the transmit interval is capped at 1440
minutes (corresponding to once every 24 hours).

CMi4170 User’s Manual English
CMi4170 User’s Manual English
Page 15
[2020-10]
Data rate
Transmit interval
(minutes)
Transmit interval,
Engelmann message
format (minutes)
DR0
180
360
DR1
120
240
DR2
60
120
DR3
30
60
DR4
15
30
DR5
15
30
Table 5: EcoMode transmit interval settings, EcoMode (6 years)
Data rate
Transmit interval
(minutes)
Transmit interval,
Engelmann message
format (minutes)
DR0
1440
1440
DR1
360
720
DR2
180
360
DR3
120
240
DR4
90
180
DR5
60
120
Table 6: EcoMode transmit interval settings, EcoMode (10 years)
6.6 Message formats
CMi4170 has several different message formats. Each one will be described in detail in this section.
6.6.1 Message structure
Message formats Standard, Compact, Scheduled –Daily redundant, Scheduled Extended, Combined
heat/cooling and Engelmann are encoded in M-Bus format (M-Bus standard EN 13757-3:2013). Message
format JSON is encoded in JSON format.
All messages begin with one byte specifying the message format used. All M-Bus encoded messages
begin with one byte specifying the message format used. Then follows a sequence of data information
blocks (DIBs), each one containing a data information field (DIF), a value information field (VIF) and a
data field (DATA). The structure of the telegram is illustrated in Figure 5.
Figure 5: CMi4170 M-Bus message structure

CMi4170 User’s Manual English
CMi4170 User’s Manual English
Page 16
[2020-10]
For message type JSON, the data is presented as plain text.
Field
Size
Description
Message
format
1 byte
0x24 = Standard
0x25 = Compact
0x26 = JSON
0x27 = Scheduled –daily redundant
0x28 = Scheduled - Extended
0x29 = Combined heat/cooling
0x2C = Engelmann telegram 1
0x2D = Engelmann telegram 2*
Table 7: CMi4170 Message formats
*Engelmann telegram 2 cannot be selected as a telegram type. It is the ID of the second telegram when
using message format Engelmann.
6.6.2 Structure and payload
In this section, a detailed description of each message format payload is provided. All numbers in the
payload are given in hexadecimal unless otherwise stated.
6.6.2.1 Standard
Table 8 provides a detailed description of the payload of message format Standard.
DIB
Field
Size
Data type
Description
0
Message
format
1 byte
-
0x24 (= Standard)
1
Energy
6-7 bytes
INT32
Energy consumption (Wh, J, Cal, MBTU)
0406xxxxxxxx = MWh, 3 decimals = kWh
040Exxxxxxxx = GJ, 3 decimals
04FB0Dxxxxxxxx = Gcal, 3 decimals
04863Dxxxxxxxx = MMBTU, 3 decimals
2
Volume
6 bytes
INT32
Volume (m3)
0413xxxxxxxx = m3, 3 decimals
3
Power
4 bytes
INT16
Power (W)
022Bxxxx = W
4
Flow
4 bytes
INT16
Flow (m3/h)
023Bxxxx = l/h, 3 decimals
5
Fw temp
4 bytes
INT16
Forward temperature (°C)
025Bxxxx, °C
6
Rt temp
4 bytes
INT16
Return temperature (°C)
025Fxxxx, °C

CMi4170 User’s Manual English
CMi4170 User’s Manual English
Page 17
[2020-10]
7
Meter ID
6 bytes
According to M-
Bus EN13757-3
identification
field
Meter ID
0C78xxxxxxxx
8
Error
flags
4 bytes
INT8
Error and warning flags
01FD17xx
Table 8: Payload, message format Standard
6.6.2.2 Compact
Table 9 provides a detailed description of message format Compact.
DIB
Field
Size
Data type
Description
0
Message
format
1 byte
-
0x25 (= Compact)
1
Energy
6-7 bytes
INT32
Energy consumption (Wh, J, Cal, MBTU)
0406xxxxxxxx = MWh, 3 decimals = kWh
040Exxxxxxxx = GJ, 3 decimals
04FB0Dxxxxxxxx = Gcal, 3 decimals
04863Dxxxxxxxx = MMBTU, 3 decimals
2
Meter ID
6 bytes
According to M-
Bus EN13757-3
identification
field
Meter ID
0C78xxxxxxxx
3
Error flags
4 bytes
INT8
Error and warning flags
01FD17xx
Table 9: Payload, message format Compact
6.6.2.3 JSON
In message format JSON, data is presented on a plain text format. Table 10 provides a description of all
fields included in the telegram.
Field
Description
Energy
Energy consumption (Wh, J, Cal)
Unit
Unit of energy consumption
Meter ID
Identification number of the meter in which the module is
mounted.
Table 10: Message format JSON
In Figure 6, an example of a telegram for message format JSON is presented.
Figure 6: JSON message example

CMi4170 User’s Manual English
CMi4170 User’s Manual English
Page 18
[2020-10]
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
Description
Clock
message
Once per day
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.
Data message
Determined by transmit
interval settings.
The actual meter data collected from the meter. For
more information.
Table 11: Clock 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
046Dxxxxxxxx = Valid date/time message
346Dxxxxxxxx = Invalid date/time message
Table 12: Payload, clock message
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 occurs 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
Values
Unit
Transmit interval
60, 120, 180, 240, 360,
480, 720, 1440
Minutes
Table 13: Transmit interval values in Scheduled mode

CMi4170 User’s Manual English
CMi4170 User’s Manual English
Page 19
[2020-10]
6.6.2.4 Daily redundant
The data message of Scheduled mode-daily redundant contains an accumulated daily energy field, which
is updated at 24:00 each day. Depending on transmit interval settings and data rate, the field will be
included in between 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 “120”, 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.
DIB
Field
Size
Data type
Description
0
Message
format
1 byte
-
0x27 (= Scheduled –daily redundant)
1
Heat energy
E1 / Cooling
Energy E3
6-7 bytes
INT32
Energy consumption (Wh, J, Cal, MBTU)
0406xxxxxxxx = MWh, 3 decimals = kWh
040Exxxxxxxx = GJ, 3 decimals
04FB0Dxxxxxxxx = Gcal, 3 decimals
04863Dxxxxxxxx = MMBTU, 3 decimals
2
Volume
6 bytes
INT32
Volume (m3)
0414xxxxxxxx = m3, 2 decimals
3
Meter ID
6 bytes
According to M-
Bus EN13757-3
identification field
Meter ID
0C78xxxxxxxx
4
Error flags
4 bytes
INT8
Error and warning flags
01FD17xx
5
Meter
date/time
6 bytes
INT32
Meter date and time (YY-MM-DD HH:MM)
046Dxxxxxxxx
Bit 31-28 = Year-high*
Bit 27-24 = Month
Bit 23-21 = Year-low*
Bit 20-16 = Day
Bit 15 = Summer time flag**
Bit 14-13 = Century
Bit 12-8 = Hour
Bit 7 = Error flag
Bit 6 = Reserved for future use***
Bit 5-0 = Minute
*The year is read by combining the year-high and year-
low field. For example, year-high = 0010 and year-low
= 010 => year = 0010010
**0 = standard time, 1= daylight-saving time
***0 = timestamp is valid, 1 = timestamp is not valid
6
Accumulated
energy at
24:00
6-7 bytes
INT32
Energy consumption (Wh, J)
4406xxxxxxxx = MWh, 3 decimals = kWh
440Exxxxxxxx = GJ, 3 decimals
44FB0Dxxxxxxxx = Gcal, 3 decimals
44863Dxxxxxxxx = MMBTU, 3 decimals

CMi4170 User’s Manual English
CMi4170 User’s Manual English
Page 20
[2020-10]
Note: Before a midnight reading has been performed
the Function field of the DIF is set to “value during
error state” to indicate that the value is not valid.
Example:
740600000000 = MWh, 3 decimals = 0 kWh
Table 14: Message format Scheduled –daily redundant
6.6.2.5 Scheduled - Extended
The data message of Scheduled mode-Extended contains all the data fields from message format
Standard with an additional meter timestamp. Like all Scheduled message formats, the meter is read at
full hour.
A detailed description of the payload in the message format is presented in Table 15.
DIB
Field
Size
Data
type
Description
0
Message
format
identifier
1 byte
-
0x28 (Scheduled-Extended)
1
Heat energy
E1 / Cooling
Energy E3
6-7 bytes
INT32
Energy consumption (Wh, J, Cal, MBTU)
0406xxxxxxxx = MWh, 3 decimals = kWh
040Exxxxxxxx = GJ, 3 decimals
04FB0Dxxxxxxxx = Gcal, 3 decimals
04863Dxxxxxxxx = MMBTU, 3 decimals
2
Volume
6 bytes
INT32
Volume (m3)
0414xxxxxxxx = m3, 2 decimals
3
Power / Flow
/ Fw temp /
Rt temp
12 bytes
INT64
Byte 0-2 = DIF/VIF codes, 0x07FFA0
Byte 3 = Scaling of Power/Flow
-Bit 6.4 (n), 10n-3 W, n = 0..7
-Bit 2..0 (m), 10m-3 m3/h, m = 0..7
Byte 4-5 = Fw temp (lsByte -> msByte), °C, 2 decimals
Byte 6-7 = Rt temp (lsByte -> msByte), °C, 2 decimals
Byte 8-9 = Flow (lsByte -> msByte), 10m-6 m3/h
Byte 10-11 = Power (lsByte -> msByte), 10n-3 W
4
Meter ID /
Info bits
9 bytes
INT48
06FF21xxxxyyyyyyyy
xxxx = Info bits (lsByte -> msByte)
yyyyyyyy = Meter ID (lsByte -> msByte)*
*Sent in binary format