DM-124
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DM-124
 
SPEC
Wireless communication based on IEEE 802.15.4 (2.4 GHz)
Auto configurable
Modbus RTU wireless transmission
230 VAC power input
Easy connection (Modbus A- and B+ terminals)
Configurable pulse counter, with 3 operating modes: Dry-contact, Open-collector, S0 type (gas and water counters)
Coordinator node - Modbus Bridge within ADVANTICSYS Wireless Sensor Networks
  • Features

 ITEM

 Specification

 Overall specifications
 Power supply  230 Vac
 Protocols  Modbus RTU, Wireless IEEE 802.15.4
 Interfaces
 RS485 (1 port)  Up to 1.2 km range and 19.2 Kbits/s Baudrate (configurable)
 Pulse counter (1 port)  3 operating modes: dry contact, open-collector or S0 type
 Radio  2.4GHz - with External Antenna (SMA connector)
 Physical Characteristics
 Dimensions  18x89x59 mm
 Material  PC/ABS
 Case fixing type  DIN rail
 Safety class  IP20
  • Theory of Operation
The following diagram shows the interconnection of different Modbus RTU compatible equipments through a wireless network created with the DM-124:

The Modbus master device, which can be a PLC, a PC or an Advanticsys controller, interrogates the Modbus devices within the network. The RS485 serial packets are converted to wireless packet frames by the connected DM-124 (id 10 in the picture) and broadcasted to the rest of the DM-124 in the network. These convert them in turn to RS485 Modbus RTU, forwarding them to the connected Modbus devices. Replies from the devices are transmitted in the same way to the network coordinator.

Since the DM-124 are considered also as Modbus devices within the network, data from the included pulse counter can be read by retrieving the data from the registers of the specific DM-124. This pulse counter is configurable as dry contact, open-collector or S0 type (for water and gas counters).

Configuration of the DM-124 can be done with a dedicated programmer and also through the Modbus network. Among other parameters it is possible to configure:

  • The Modbus identifier and their master or slave behaviour
  • The IEEE 802.15.4 radio channel, and the radio cluster identifier, allowing different networks to coexist

In order to extend the network and/or the number of devices, groups of DM-124 can be connected in cascade as the following diagram shows: 

  • Resources
  • References
  • Requirements

In the table below, minimum and recommended hardware and software requirements are listed.

Minimum and recommended requirements

  • Dependencies

To run the configurator user needs install the Microsoft Framework .NET v3.5 package or higher. During the installation process, it will automatically check if your computer has this software package installed. If not, it will proceed with the installation, so that you can start installing the MPC Config Tool even if you are not sure whether .NET is installed on your system.

  • Execution and installation

To start the installion process, double-click the installation file. An installation wizard will start. Once you accept the license agreement, the wizard will let you select the folder where the files will be copied and if you want to create a shortcut on the desktop and in the start menu. Before completing the installation, it will check if. NET is installed on your computer, proceeding to install it if not detected.

  • Supported Devices

This configuration software is compatible with DM-124 devices.

  • Connection

Configuration of DM-124 devices can be done in several ways:

  • using a dedicated AdvanticSYS programmer
  • communicating via the RS-485 bus using Modbus RTU protocol
  • using an AdvanticSYS controller with a TCP/RTU bridge enabled
  • via radio using a UD1000 dongle

The DM-124 Config Tool permits using any of the above, by simply selecting the corresponding option in the right hand side of the initial screen:

DM-124 ConfigTool Initial Screen

  • RS485

Connect the RS-485 terminals A and B to the corresponding lines of your bus. It is assumed that access to the RS-485 bus is possible from a computer, for example through a USB-485 converter. Once a serial port is available, select RS485 as connection option, and then edit the corresponding parameters for the bus (baudrate, parity, data & stop bits). Finally, press the button labeled Connect in the lower right hand side corner of the screen.

  • Advanticsys Programmer

It is also possible to connect a dedicated Advanticsys Programmer to the associated connector in the DM-124. In this case, select Advanticsys Programmer as connection option, indicate the associated serial port and press the button labeled Connect in the lower right hand side corner of the screen.

  • Radio

To make use of the radio configuration an UD1000 dongle is needed. Connect the UD100 to your computer and in the configurator select OTA as connection option. It is necessary to indicate the serial port assigned to the UD1000 in the computer as well as the radio channel the DM-124 network is using. As always, press the button labeled Connect in the lower right hand side corner of the screen.

DM-124 Terminal Connections


No matter the connection option, once the Connect button is pressed, the DM-124 Config Tool automatically scans for available devices on the bus, retrieving their stored configuration:

DM-124 ConfigTool Data Retrieved

From this screen it is possible to edit the different parameters to configure the DM-124 to work as needed. It is important to know exactly what the role of the DM-124 is going to be, so first of all it may be advisable to take a look at the theory of operation here. After having a clear view on the type of installation desired, proceed to the following section to see how to do it.

  • Usage

Parameters Configuration

Modbus Parameters

The DM-124 can have the following Modbus RTU parameters configured: 

  • Modbus id (anything between 1 and 247). 
  • RS-485 configuration parameters (baudrate, parity, start & stop bits, up to 19200 baudrate). 
  • Packet-silence time, in milliseconds, in case the Modbus RTU default silence period is not the most adequate one to interface with a connected device. 

By default, a brand new DM-124 has 1 as Modbus id, 19200 8 N 1 as RS485 configuration and the standards silence period between packets. 

Important: the DM-124 must have a unique Modbus id inside the Modbus network, as in itself it is a Modbus node. Choose a Modbus id multiple of 10 if you want this DM-124 to act as network coordinator (i.e. if it is going to be connected to the Modbus Master device). There can only be one network coordinator inside a DM-124 cluster. 

DM-124 Modbus Parameters

  • Radio Parameters

The DM-124 can have the following wireless parameters configured:

  • Radio id, anything between 1 and 65534
  • Group id, anything between 1 and 254
  • Radio Channel, anything between 11 and 26

By default, a brand new DM-124 has a random Radio id, 34 as Group id and uses Radio Channel 15.

Important: the DM-124 must have a unique Radio id inside the cluster. A cluster is established by DM-124 devices that have the same Group id and Radio Channel. 

DM-124 Radio Parameters

  • Slave Device Parameters

Additionally it is possible to map other AdvanticSyS compatible wireless sensors to the DM-124. This enables to access data provided by the sensors by ready the associated DM-124 registers.

To add new slave devices select the desired number with the Slave Motes drop down list at the left of the screen. This will add the new slave devices to the main configuration area at the right hand side: 

DM-124 Edit number of Slave Wireless Devices

Configuration appears in red if there is some incompatibility with the chosen options. The slave devices must have different radio ids among them, and with the DM-124 itself. Once the incompatibilities are solved the configuration screen appears as follows:

DM-124 Edit Slave Device Configuration

  • Default Parameters

It is possible to return to the default settings by pressing the Set Default Values button: 

DM-124 Default Settings Button

  • Apply changes

Once finished with the different settings, it is necessary to upload the new configuration to the DM-124. To do so, press the Upload button. A progress bar will indicate the process finalization:

DM-124 Upload Settings

  • Resources


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