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 ->Povolit ping). Je-li povoleno, monitor sítě pravidelně pinguje (dotazuje se) na tuto adresu. Pokud je od zařízení přijata jakákoli odpověď, včetně odezvy na výjimku, je to považováno za důkaz komunikace a klientské zařízení Modbus již není považováno za „nefunkční“, pokud bylo dříve označeno jako „dole“.
