摘要：Nowdays, automation system become important aspect in manufacturing process because could make integration manufacturing process on it more effective and more efficient. PLC or Programmable Logic Controller is one kind of automation system. Many industries use PLC as automation control device in manufacturing process to control all kind of process. For example at transportation process of coals in generator industry. Coals could be burned because main elements of coals are carbon, hydrogen, and oxygen. Base on this prototype early warning system design, we get the result if sensor thermocouple detect temperature more large than setpoint temperature (it is 2000C), then PLC will give an order to shut down the output, that is belt conveyor. Result of this prototype design could used at coals transportation as an early warning system. Design of prototype early warning system could detect and prevent fire because of consequence of burned coals until spreading of fire could be avoided.
关键词：PLC Siemens S7-300; IC AD 595; Sensor Thermocouple K
