• The universal converter is used for application where you need to send data from Modbus over the LoRa network or NB-IoT
• We offer battery operated units, as well as external power operated units.
• Each universal converter has implemented LUA scripts and can be configured via configuration software

• Windows 7: https://acrios.com/downloads/SW/IoT_Converter_GUI_2019-12_win7_fd191d8.zip
• MacOS 10.15: https://acrios.com/downloads/SW/IoT_Converter_GUI_2019-12_macos_ec77ff4.zip
• User guide: https://wiki.acrios.com/doku.php?id=public:products:mbus-nbiot-sw

• Windows 10: https://files.acrios.com/index.php/s/btmdxi8wgGLgMyy
  

• Good for externally power supplied units. It can save you from overvoltaging your PC in case of faulty cable connection.
  
• Can be supplied by iNELS Air
  
• 3.5mm jack connector
  

1. Loosen the screws and open the lid
2. Connect the cables from Modbus to the terminal board
3. Remove the paper from the battery bay
4. The device initializes, flashes green 3 times
5. Put the lid back in the box and pull it off screws

• 3x green - successful device initialization and network connection (with OTTA)
• 1x green - successful sending of the first data
• 1x red - unsuccessful sending of the first data

api.rs485Send( msg)

This function sends msg to RS485 bus. Turn on RS485 using rs485State first.

Arguments

• msg (string) - Data to be sent to RS485 bus

Example

api.rs485Send('test') 
--sends 'test' string to RS485

—

api.rs485Setup( baudrate, parity, stopBits, dataBits)

This function changes the configuration of RS485 interface

Arguments

• baudrate (integer, optional) - Baudrate to use for communication (up to 921600 baud)
• parity (integer, optional) - Parity, 0 for none, 1 for odd and 2 for even parity
• stopBits (integer, optional) - Number of stop bits, 1 or 2 allowed
• dataBits (integer, optional) - Number of data bits, 7 or 8 allowed

Example

--setup RS485 interface to 9600 Baud, 8E1 
api.rs485Setup(9600, 2, 1, 8)

—

api.rs485State( state)

This function turns on the RS485 circuitry, must be used before rs485Send or rs485Receive.

Arguments

• state (integer) - New state of RS485 circuitry: 0 for off, 1 for on (fast power-up)

Example

api.rs485State(0) --turn off RS485

—

answer,len = api.rs485Receive( timeout)

This function waits timeout milliseconds for data reception from RS485 bus. Turn on RS485 using rs485State first.

Arguments

• timeout (integer) - The maximum time in milliseconds to wait for RS485 device answer

Returns

• answer (string) - Data received from RS485 bus in given time
• len (integer) - Number of bytes received

Example

--waits 1s for answer from RS485 bus 
ans,len = api.rs485Receive(1000)

—

crc = api.modbusCrc( msg)

This function calculates Modbus request checksum.

Arguments

• msg (string) - Modbus request

Returns

• crc (string) - Modbus crc for request

Example

--calculate checksum for Modbus request 110100010002 
req = pack.pack('<b6', 0x11,0x01,0x00,0x01,0x00,0x02) 
crc = api.modbusCrc(req) --crc = "EE9B"

msg, answer = api.nvtProcess(buf)

This function processes NVT message and either sets baudrate, datasize, parity or stop size for MBUS or MODBUS.

Arguments

• buf (string) - Message to be processed

Returns

• msg (string) - Message without NVT sequence
• answer (string) - NVT answer

Example

ret,port,buf = api.loraSend(0,1000,data) 
if buf ~= nil then 
	buf, nvtans = api.nvtProcess(buf) 
	api.rs485Send(buf)
end

—

answer = api.nvtEncode(msg)

This function encodes message to NVT format.

Arguments

• msg (string) - Message to be encoded to NVT

Returns

• answer (string) - NVT message

Example

ans,len = api.rs485Receive(50) 
ans = api.nvtEncode(ans) 
api.loraSend(0,1,ans)