FR-A701 INSTRUCTION MANUAL (Applied) - Automation Systems ...

Communication operation and settingGeneral flowchartPort openCommunication settingTime out settingSend data processing◦Data setting◦Sum code calculation◦Data transmissionReceive data waitingReceive data processing◦Data retrieval◦Screen displayCAUTIONAlways set the communication check time interval before starting operation to prevent hazardous conditions.Data communication is not started automatically but is made only once when the computer provides acommunication request. If communication is disabled during operation due to signal loss etc., the inverter cannotbe stopped. When the communication check time interval has elapsed, the inverter will come to a trip (E.PUE,E.SER). The inverter can be coasted to a stop by switching on its RES signal or by switching power off.If communication is broken due to signal loss, computer fault etc., the inverter does not detect such a fault. Thisshould be fully noted.310