Modbus TCP/IP

[AndersH]

Hi, first time to set up a communication Modbus TCP/IP in a HomeLynk.
KNX precens detectors should send a 1bit (1/0) to the ventilation system via Modbus, how should i start ?
Ventilation system is Modbus slave, and have IP 172.xx.xx.xxx, ID 240, and port 502

This is a script from ventilation system: 

  //mbreg[10001] = 0
//end
//Gate 1 slinga 1
addrange g1 11101 11119
remnode g1 11107
//Gate 1 slinga 2
addrange g2 12107 12129
remrange g2 12108 12119
//Gate 2 slinga 1
addrange g3 21101 21127
remnode g3 22114
//Gate 2 slinga 2
addrange g4 22128 22141
remnode g4 22133
//Gate 3 slinga 1
//addrange g5 31101 31116
//Gate 3 slinga 2
//addrange g6 32108 32109
//Gate 4 slinga 1

//Gate 4 slinga 2


foreach n g1
  GMR = n - 1100

  if mbreg[GMR] equal 1
    tassign rep["Nrvarozon" @ n] 71
  end
 
  if mbreg[GMR] equal 0
    restore rep["Nrvarozon" @ n]

  end
next

foreach n g2
  GMR = n - 2100

  if mbreg[GMR] equal 1
    tassign rep["Nrvarozon" @ n] 71
  end
 
  if mbreg[GMR] equal 0
    restore rep["Nrvarozon" @ n]
  end
 
next


foreach n g3
  GMR = n - 10900

  if mbreg[GMR] equal 1
    tassign rep["Nrvarozon" @ n] 71
  end
 
  if mbreg[GMR] equal 0
    restore rep["Nrvarozon" @ n]
  end
 
next

foreach n g4
  GMR = n - 11900

  if mbreg[GMR] equal 1
    tassign rep["Nrvarozon" @ n] 71
  end