Modbus tcp scripting help

[admin]

This will try writing 3 times to 3 slave IDs (1, 2, 3). Any possible errors can be found in Logs.

Code:

require('luamodbus')

if event.getvalue() >= 0 then
  value = 0 -- Manual stop command
else
  value = 3 -- Auto command
end

for retry = 1, 3 do
  mb = luamodbus.tcp()
  mb:open('192.168.1.7', 502)
  cres, cerr = mb:connect()

  if cres then
    for id = 1, 3 do
      mb:setslave(id)
      wres, werr = mb:writeregisters(367, value)

      if not wres then
        log('write failed', id, werr)
      end
    end
  else
    log('connect failed', cerr)
    os.sleep(1)
  end

  mb:close()

  if cres then
    break
  end
end