Atim Cloud Wireless ACW/LW8-DINRSM User manual

ATIM Radiocommunications
Chemin des Guillets
38250 Villard-de-Lans, France
www.atim.com
[email protected]
Concerned models:
ACW/LW8-DINRSM
ACW/SF8-DINRSM
ATIM Cloud Wireless
Modbus PLC connector
DINRSM / RS485
User Guide

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ATIM_ACW-DINRSM_UG_EN_V2.8
TABLE OF CONTENTS
Document version history .......................................................................................................................................................2
Disclaimer.................................................................................................................................................................................2
Trademarks and copyright.......................................................................................................................................................2
Declaration of compliance.......................................................................................................................................................3
Environmental recommendations ..........................................................................................................................................3
a. Environment 3
b. Radio 4
Technical specifications ...........................................................................................................................................................5
Installation................................................................................................................................................................................6
c. Positioning 6
d. Connecting the modem 7
c. Push button 8
d. Interpreting the indicator lights 8
Normal start-up behavior........................................................................................................................................................9
Parameter settings and configuration ....................................................................................................................................9
a. Parameter settings 9
b. Configuration via USB 12
Transmitting information on IoT networks (Sigfox/LoRaWAN)...........................................................................................17
a. Keep-alive frame 17
b. Periodic frame (or triggered by pressing button) 17
c. Error frame 17
Receiving information from IoT networks (Sigfox/LoRaWAN).............................................................................................19
a. Parameters 19
b. Commands 23
Troubleshooting.....................................................................................................................................................................29
a. The modem cannot be configured via USB or the configuration tool page does not refresh 29
b. Radio data not received 29
c. Modem LED is not flashing 29
Technical support...................................................................................................................................................................30

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ATIM_ACW-DINRSM_UG_EN_V2.8
Document version history
Version
Date
Description
Author
Concerned
software version
1.0
25/09/2016
Document creation
AM
1.1
25/11/2016
Corrections
FR
1.2
13/02/2017
Images updates
AM
1.3
09/05/2017
Addition of concerned product references
YM
1.4
11/10/2017
Update of the front image
AM
1.4
2.0
12/12/2017
Modbus master only
Downlink configuration
AM
3.1.0
2.1
04/01/2018
Corrections
FR
3.1.0
2.2
16/01/2018
Keepalive frame addition
AM
3.2.0
2.3
09/02/2018
Translation corrections
YM
3.2.0
2.4
30/03/2018
Correction of values for configuring the number of
bits of serial link.
AM
3.2.0
2.7
23/05/19
Connections board corrections
SC
3.2.3
2.8
25/02/2020
- Downlink command addition for Modbus
writing/reading
- Increase of the number of Modbus requests from
32 to 49.
YL
3.3.5
Disclaimer
The information contained in this document is subject to change without warning and does not represent a
commitment on the part of ATIM.
Trademarks and copyright
ATIM, ACW ATIM Cloud Wireless®and ARM Advanced Radio Modem®are registered trademarks of ATIM SARL in
France. The other trademarks mentioned in this document are the property of their respective owners.

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ATIM_ACW-DINRSM_UG_EN_V2.8
Declaration of compliance
All ACW Atim Cloud Wireless®products comply with the regulatory requirements of the R&TTE Directive
(1999/5/EC), article 3:
1 SAFETY (Article 3.1a of the 1999/5/EC Directive)
NF EN60950-1 Ed. 2006/A1:2010/A11:2009/A12:2011 (health)
EN62479: 2010 (power <20mW) or EN62311:2008 (power > 20mW)
2 Electromagnetic Compatibility (Article 3.1b of the 1999/5/EC Directive)
EN 301489-3 v1.4.1, EN 301489-1 V1.9.2
3 Efficient use of the radio frequency spectrum (Art.3.2 of the 1999/5/EC Directive)
ETSI EN300 220-2 v2.4.1 and EN300 220-1 v2.4.1
Environmental recommendations
a. Environment
Respect the temperature ranges for storage and operation of all products. Failing to respect these guidelines could
disrupt device operation or damage the equipment.
Follow the instructions and warnings provided below to ensure your own safety and that of the environment and to
protect your device from any potential damage.

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ATIM_ACW-DINRSM_UG_EN_V2.8
Waste disposal by users in private households within the European Union. This symbol appears on a product or
its packaging to indicate that the product may not be discarded with other household waste. Rather, it is your
responsibility to dispose of this product by bringing it to a designated collection point for the recycling of
electrical and electronic devices. Collection and recycling waste separately at the time you dispose of it helps
to conserve natural resources and ensure a recycling process that respects human health and the environment.
For more information on the recycling center closest to your home, contact your closest local government office,
your local waste management service or the business from which you purchased the product.
b. Radio
Modems in the ACW line are radio-communication modems that use the ISM (industrial, scientific and medical) bands,
which may be used freely (at no cost and with no authorization required) for industrial, scientific and medical
applications.
General hazard –Failure to follow the instructions presents a risk of equipment damage.
Electrical hazard –Failure to follow the instructions presents a risk of electrocution and physical injury.
WARNING: do not install this equipment near any source of heat or any source of humidity.
WARNING: for your safety, it is essential that this equipment be switched off and disconnected from mains
power before carrying out any technical operation on it.
WARNING: the safe operation of this product is ensured only when it is operated in accordance with its intended
use. Maintenance may only be performed by qualified personnel.

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ATIM_ACW-DINRSM_UG_EN_V2.8
Technical specifications
Dimensions
90 x 57 x 17.9 mm
Antenna
External via SMA connector
Temperature
-20°C to +55°C (operation)
-40°C to +70°C (storage)
Mounts to
DIN rail
Power supply
1x power supply, 10-30 V DC
Frequency
865 –870 MHz
Power
25 mW (14 dBm)
Transfer rate
Sigfox: 100 bps
LoRaWAN: 300 bit/s to 10 kbit/s
Current draw (24 V)
Sigfox:
Current draw (24 V)
Tx mode (max)
40 mA
Tx mode (max)
Rx mode (max)
30 mA
Rx mode (max)

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ATIM_ACW-DINRSM_UG_EN_V2.8
Space requirements and mounting
Dimensions indicated in mm.
‘Circuit-breaker’-style ACW DIN modems are mounted on a DIN rail.
Installation
c. Positioning
This version was designed for installation in an electrical box made of PVC or metal. If the box is made of insulating
material (PVC, ABS, fibreglass), you can also simply use a small ½ wave whip antenna: Ref. ATIM ANT868-12FSC. This
antenna must be firmly screwed onto the SMA connector and positioned vertically, preferably pointing upward.
➔If a metal box is used, the antenna must be positioned outside the box in order to ensure good radio
performance and avoid the ‘Faraday cage’ effect.
For optimal results, we recommend that the antenna be positioned high up and at least 1 metre away from all metallic
objects.

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ATIM_ACW-DINRSM_UG_EN_V2.8
d. Connecting the modem
Terminal blocks
Antenna (SMA)
Before connecting the product to mains power, connect the antenna: either a ½ wave whip
antenna (ref. ATIM ANT868-12FSC) or an external antenna —¼ wave (ref. ATIM ANT868-
14S4.0) with a metallic ground plane or ½ wave (ref. ATIM ANT868-12S3.8) —or a roof
antenna with a low-loss cable (ref. ATIM ANT868-BZ or ANT868-08).
WARNING
It is mandatory to connect the antenna before powering the product. Failure to do so may cause the product to malfunction
and become unusable.
Power supply (bottom terminal block)
The ACW-DINRSM must be supplied with a DC power supply between 10 V and 30 V that can provide a
minimum current of 100 mA.
RS485 (top terminal block)
The maximum cable length will depend on the type of serial link and the baud rate in use. A maximum length
of 1 meter is appropriate for all use cases.
For an RS485 connection, you have the option to activate the 120Ω termination resistor:
•upward position (SMA side): resistor activated
•downward position (USB side): resistor deactivated
USB
The USB connector allows you to configure the ACW with a PC and a USB cable. See section « Configuration
via USB » for more details.
Name
Description
Input / Output
GND
Earth/Ground (Gnd)
Earth
10/30V
Power supply between 10 V
and 30 V
Input (power supply)
NC
Not connected
/
Tx/BZ
RS485 BZ
Bidirectional/differential
Rx/AY
RS485 AY
Bidirectional/differential
NC
Not connected
/

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ATIM_ACW-DINRSM_UG_EN_V2.8
NOTE
To configure the device, it must be connected to power at 10/30 V DC.
c. Push button
The push button located on the front panel of the housing can be used to initiate a Modbus/Radio cycle. This lets you
test the Modbus configuration and radio connectivity. If no Modbus frame is configured, a “keep-alive”frame will be
sent.
d. Interpreting the indicator lights
The indicator lights are used to display the state of operation of the DINRSM. In general, a GREEN light indicates
correct operation, while a RED light indicates an error.
Success or failure of an operation
Behaviour
The RED or GREEN flashes rapidly for about ½ second. A RED light indicates failure, while a GREEN light indicates
success.
Event
•When switching on the device (after a brief delay) to indicate it has started up correctly.
•After a Modbus frame if the response fails (RED light).
USB connection or radio activity
When a radio message is sent over the network, the GREEN light flashes every half-second while it is being sent. This
may last for up to one minute. This light flashes in a similar manner when the product is connected via USB.
Modbus communication
During Modbus communication, the GREEN light remains on throughout the entire process. If a Modbus error is
detected, the RED light will flash rapidly.

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ATIM_ACW-DINRSM_UG_EN_V2.8
Normal start-up behavior
When the device is switched on, after a brief delay, the GREEN light flashes rapidly for about ½ second to indicate
that the device has started up correctly. The periodic frame is then sent out, based on the statement period specified
in the settings. If a USB cable is connected to the DINRSM, the GREEN light will flash if that connection is in place.
Parameter settings and configuration
a. Parameter settings
Serial link parameters
The RS serial link can be configured with different parameters. Not all parameter settings are compatible with one
another.
The configurable parameters are as follows: 8N1, 8N2, 8E1, 8O1, 7N2, 7O1, 7O2, 7E1, 7E2.
Type of serial link
•Only RS485
Serial link baud rate
•1200 bps
•2400 bps
•4800 bps
•9600 bps
•19200 bps (default)
•38400 bps
•57600 bps
•115200 bps
Serial link parity
•No parity (default): N
•Even: E
•Odd: O
Number of bits for the serial link
•7 bits
•8 bits (default)
Number of stop bits for the serial link
•1 bit (default)
•2 bits

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ATIM_ACW-DINRSM_UG_EN_V2.8
Frame period
A complete radio cycle is composed of two phases: 1/ sending requests to one or several Modbus slave(s), 2/
broadcasting retrieved Modbus data via radio communication.
During requesting phase, up to 49 Modbus request frames are sent through serial link to slave Modbus equipment,
which return data requested by the ACW-DINRSM.
During radio emission phase, Modbus registers or bits retrieved by ACW-DINRSM are broadcast under one or several
frames according to the configuration.
The interval for this cycle is once per hour by default but can be configured for intervals ranging from 10 minutes to
28 days, in increments of 1 minute.
To ensure compliance with radio standards, it is essential that you select an appropriate interval time for the number
of radio frames that will be broadcast. This comes to 15 radio frames for LoRaWAN and 6 radio frames for Sigfox every
hour.
Modbus timeout
During Modbus communication, if a slave does not respond during the specified time, an error will be reported. This
period is set to 1 second by default and can be set to values from 100 milliseconds to 65 seconds, in increments of
100 milliseconds.
Keep-alive frame parameter
A keep-alive frame can be transmitted periodically. On a Sigfox network, this frame is also used to request the
transmission of a downlink frame, thus providing the ability to reconfigure the ACW remotely via radio.
The following periods are available
Deactivated (no keep-alive frame is transmitted).
•Every hour.
•Every two hours.
•Every four hours.
•Every eight hours.
•Every day.
•Every two days.
•Every three days.
•Every four days. (default)
•Once a week (every 7 days).
•Once a month (every 30 days).
Parameter settings for Modbus and radio frames
You can configure up to 49 Modbus frames and a certain number of radio frames, depending on your statement
period. A radio frame is defined by the parameters from the Modbus frames.

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ATIM_ACW-DINRSM_UG_EN_V2.8
Therefore, you must configure the following parameters:
Modbus function code
The following function codes are available:
Concatenation with previous frame
This parameter provides the option to not create a new radio frame and to include the result of the Modbus frame
with the result of the previous Modbus/radio frame.
Slave address
Indicates the address of the Modbus slave device.
Register or bit address
Indicates the address of the first register or bit to be read.
Radio header
The radio header is a value that is used to identify the type of radio frame. You must choose the correct value in order
to identify what data are included in the frame. When concatenation is used, only the header of the first frame will
be used.
Number of registers or bits to read
A frame is considered as unused if this value is equal to 0. Depending on the function code you have selected and the
number of frame concatenations, you can indicate the number of registers or bits that you want to read. Keep in mind
that a Sigfox radio frame cannot contain more than 10 bytes of data, i.e. 5 Modbus registers. A LoRaWAN radio frame
cannot contain more than 34 bytes of data, i.e. 17 Modbus registers.
For more details, see Modbus frame parameters (Code 30 to 61).
Function code
Name
0x01
Read Coils
0x02
Read Discrete Inputs
0x03
Read Holding Registers
0x04
Read Input Registers

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ATIM_ACW-DINRSM_UG_EN_V2.8
b. Configuration via USB
For a DINRSM with application software version
Use ACW configuration tool version
V3.0 or earlier
V3.7.15 or later
V3.2 or later
V4.4.0 or later
V3.3.5 or later
V4.5.9 or later
Download and install the configuration tool “setupACW.exe”at:
https://www.atim.com/wp-content/uploads/documentation/CONFIGURATEUR/ACW/configurateur-acw.exe
Connect the ACW-DINRSM to your computer with a micro-USB cable, then start the ACW configuration tool. When
you connect the ACW-DINRSM, the ACW configuration tool window changes to give you access to parameter settings
for your device. The current configuration of the connected ACW-DINRSM device is automatically retrieved and
displayed.
A window appears, like the one below:
Product reference
Radio module firmware
version
radio module
ACW/DINRSM
firmware version
Reload settings
Apply settings

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ATIM_ACW-DINRSM_UG_EN_V2.8
Four major sections can be distinguished here. The ‘Serial parameters’ section is at the top left, “Other parameters”
at the center left, the Modbus configuration section at the right and the debugging area at the bottom.
Parameter settings for Radio and Modbus frames
In the Modbus section at the right, you can add radio (network) and Modbus frames, add a Modbus frame to a radio
(network) frame, edit a Modbus frame as well as delete and test Modbus frames. Right-clicking in this area will open
a context menu (shown below) that lists the various actions just described. You can also access these actions more
quickly by using the keyboard shortcuts shown on the right side of the context menu.
When adding or editing a Modbus frame, a window like the one below will appear. Use this window to configure all
the parameters for your Modbus frame.
NOTE
To edit the Radio (Network) header, you will have to edit the first Modbus frame.
The number of Modbus and radio (network) frames is limited. Just above the frame configuration area in the main
window, you will see a summary of the number of frames that you have used and the total number that you can use.
In Sigfox, you can configure one frame every ten minutes for a maximum of 6 frames every hour. +
In LoRaWAN, you can configure one frame every four minutes for a maximum of 15 frames every hour.

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ATIM_ACW-DINRSM_UG_EN_V2.8
Testing Modbus frames
Before testing a Modbus frame, you must connect the ACW-RSM to your Modbus slave device. Next, configure the
parameters for the serial link and click ‘Apply’ to apply the serial parameters.
Create a Modbus frame by pressing ‘A’, clicking the ‘Add’ button or by right-clicking and selecting from the context
menu. The Modbus configuration window appears. Enter the parameters you want to test, then confirm by clicking
‘OK’. Select the newly created frame and press ‘T’ or select from the context menu. A Modbus frame is created and
sent to the debugging terminal at the bottom of the main window, which automatically switches to Modbus mode. If
any errors occur, the relevant sections of the affected frames will be highlighted in red.
In the example above, 3 tests have been performed on the same frame. The first two have failed and the last one has
succeeded. In this way, you can adjust the timeout period and the parameters for your frames.
With RS485, if ‘00’ appears after the timeout when testing a Modbus frame, this probably means that the RS485
termination resistor is not activated.
Therefore, you should activate it by flipping the switch on the front of the device.

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ATIM_ACW-DINRSM_UG_EN_V2.8
Configuration example
In this example, we have 3 radio frames with headers of 40, 41 and 90 plus 7 Modbus frames. Radio frame 40 contains
4 Modbus frames; radio frame 41 contains 2 Modbus frames; and radio frame 90 contains just one Modbus frame.
The figure below shows the radio frames that will be sent out (if the Modbus slaves respond):
Radio frame 40
Byte
1
2
3, ..., 17
18, 23
24, .., 31
32, 33
Data
0x03
40
Values of the
120 bits from
frame 1
Values of the
43 bits from
frame 2
Values of the
4 registers
from frame 3
Values of the
register from
frame 4
Radio frame 41
Byte
1
2
3, ..., 10
11, ..., 14
Data
0x03
41
Values of the 4
registers from frame
5
Values of the 2
registers from frame
6

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ATIM_ACW-DINRSM_UG_EN_V2.8
Radio frame 90
Byte
1
2
3, ..., 36
Data
0x03
90
Values of the 17 registers
from frame 7

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ATIM_ACW-DINRSM_UG_EN_V2.8
Transmitting information on IoT networks (Sigfox/LoRaWAN)
a. Keep-alive frame
This frame is sent to the network instead of the periodic frames if no Modbus frame is configured.
Frame format:
Byte
1
2
3
4
5
6
Data
0x01
Power supply voltage of radio
core on standby (millivolts –
typically 3300 mV)
Power supply voltage of radio
core when transmitting
(millivolts –typically 3300 mV)
0x64
b. Periodic frame (or triggered by pressing button)
This frame is sent to the network at a regular, configurable interval (the statement period).
Frame format:
Byte
1
2
3,4 ...
Data
0x03
Header
Values of Modbus registers and/or bits read from the slave(s)
The header is a configurable parameter and must be set correctly to decode the frame. Modbus registers are sent in
a 2-byte format in MSB order.
c. Error frame
This frame is sent to the network when a Modbus or internal error occurs. Internal errors may arise due to an incorrect
Modbus configuration.
NOTE
This frame replaces a faulty radio frame. If the data in the radio frame were valid, they will be lost.
Byte
1
2
3
4
5
6
7
8
9
Data
0x83
Parameter
Radio
header
Error
code
@Slave
Function
code
@Register
MSB
@Register
LSB
Number
of
registers

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ATIM_ACW-DINRSM_UG_EN_V2.8
The parameters of the Modbus frame are sent back to identify which frame failed. An error code is also included to
tell you which error occurred, so that you can correct your configuration if necessary. The error codes are explained
below:
NOTE
The codes in blue are returned directly by the Modbus server and the codes in green are specific to the ACW-DINRSM.
Error code
Description
0x00
Reserved, not used
0x01
Illegal function: The Modbus server does not support the specified function code; it
may not be configured or implemented.
0x02
Illegal data address: One or more register or bit addresses are not permissible. This is
due to a register or bit address outside of the slave’s addressable range. This can occur
if the specified number of registers or bits is too large and extends outside of the
authorised range of registers or bits.
0x03
Illegal data value: One or more values in the Modbus frame are not permissible.
0x04
Server failure: A non-recoverable error has occurred on the slave device.
0x05 - 0xF9
Reserved, not used
0xFA
Timeout: the Modbus frame has not received a response within the specified time
period. This occurs when the timeout value is too small or if the slave device is not
present on the serial link.
0xFB
CRC error: The Modbus CRC returned by the slave is incorrect. This may be caused by a
bad connection between the devices.
0xFC
Modbus frame error: A communication error has occurred. The Modbus frame is ill-
formed and cannot be decoded. This may be caused by a bad connection between the
devices or by incorrect parameter settings for the serial link. Other factors can also
cause this error.
0xFD
Modbus buffer too small: The memory buffer for Modbus communication is full. This
occurs when the number of registers or bits to be read is too large. To resolve this
error, you must reduce the number of registers or bits read into the Modbus frame.
This error can also be caused by incorrect parameter settings for the serial link.
0xFE
Radio buffer too small: The memory buffer for radio communication is full. This occurs
when the number of radio frames is too large. To resolve this error, you must reduce
the number of register or bits read into one or more Modbus frames, and/or reduce
the number of radio frames.
0xFF
Internal error: An unspecified internal error has occurred. This can result from a
number of different causes.

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Receiving information from IoT networks (Sigfox/LoRaWAN)
You can use this feature if your product includes a compatible radio version.
•Sigfox radio firmware: Version 5931 or later
•LoRaWAN radio firmware: Version 2.3.3 or later
The document ATIM_ACW-DLConfig_UG_EN.pdf explains how exchange frames work for this function.
NOTE IMPORTANTE
When you send the command to request the ACW configuration, several uplink frames will be sent. During this process, ANY
DOWNLINK FRAME you send will not be processed and will be lost.
a. Parameters
The following is a description of all the accessible parameters.
Serial link parameter setting (Code 10)
Size and Code (Byte 1)
Value (Bytes 2 and 3)
0x40|10=0x4a
0xYYYY
The value (0xYYYY) is broken down into several parts to contain the entire serial configuration.
NOTE
The low byte / LSB is first.
The default configuration is 0x5041. This corresponds to a serial link of type RS485, 19200 bps, no parity, 8 bits of data
and one stop bit (8N1).
Type of serial link –Byte 2 –bits 0 to 1
The possible values in byte 2 for these bits are:
•0x01 = RS485 (default)
Serial link speed –Byte 2 –bits 4 to 7
The possible values in byte 2 for these bits are:
•0x00 = 1200 bps
•0x10 = 2400 bps
•0x20 = 4800 bps
•0x30 = 9600 bps
•0x40 = 19200bps (default)