RS485

[omarlachhab]

Hello everyone,

Is it possible to convert RS485 command this to modbus RTU.

if not port then
require('serial')
port = serial.open('/dev/RS485-1', { baudrate = 9600, parity = 'none', databits = 8, stopbits = 1  ,duplex = 'half'})
port:flush()
end

if port then
  commandWrite = string.char(0x63, 0x67, 0x67, 0xD5, 0xD5, 0x67, 0x67, 0x66,0x66 ,0xD)
port:write(commandWrite)
  port:close()
 
end

  FN485 All Units Communication Protocol v121.pdf (Size: 1.71 MB / Downloads: 9)

[admin]

It's a custom protocol that's not compatible with Modbus. You have to use a single resident script for integration because RS485 port cannot be shared between multiple scripts.