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Connector Bridge RS485 Interface
#1
Hello, I have a Connector Bridge RS485 Interface device. Can you send the script how to send such commands through modbus.

I am trying the common function:

function blind(command)
require('serial')
port = serial.open('/dev/RS485-1', { baudrate = 9600, parity = 'none', databits = 8, stopbits = 1 })
port:flush()
port:write(command)
port:close()
end


Example event script:
]
blind('!000V?;')


I am attaching the command of the device

Thank you

Attached Files
.pdf   Connector_Bridge_RS485_Interface.pdf (Size: 288.66 KB / Downloads: 18)
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#2
Use this script to send a command and receive a reply from the bridge. Make sure that only a single script instance is running at any time. Serial port cannot be shared between multiple concurrent scripts.

Code:
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require('serial') port = serial.open('/dev/RS485-1', { baudrate = 9600 }) function readreply()   local line = {}   while true do     local char, err = port:read(1, 5)     if char == nil then       return nil, err     elseif char == ';' then       break     else       line[ #line + 1 ] = char     end   end   return table.concat(line) end command = '!000V?;' port:write(command) res, err = readreply() log(res, err)
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