The ModbusRJ12 device is a component that is responsible for servicing a physical device connected to the ModbusRJ12 network. The device is a Modbus master to all other Modbus devices on the attached RJ12 port. Each device is represented by the ModbusDevice and has a unique Modbus address (from 1 to 247) as well as the other Modbus config data and starting addresses for Modbus data items (coils, inputs, input registers, holding registers). The component has a Ping action available under the right-click, which sends a test message to the device to check the device status. Each ModbusDevice has a "Ping Address" container slot with 3 property slots (Address Format, Ping Address Reg, Ping Type). These properties specify a particular data address (either input register or holding register) to use as the device status test (meaning "Monitor" ping requests). Ping requests are generated at the network level by the configurable network monitor (ModbusNetwork ->Омогући пинг). Када је омогућен, мрежни монитор периодично пингује (упитује) ову адресу. Ако се од уређаја прими било какав одговор, укључујући одговор на изузетак, то се сматра доказом комуникације, а Модбус клијентски уређај се више не сматра „искљученим“ ако је претходно био означен са „доле“.
