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

4PARAMETERS4.24 Communication operation and settingCommunication operation and settingPurposeCommunication operation from PU connectorCommunication operation from RS-485terminalsRestrictions on parameter write throughcommunicationParameter that must be SetInitial setting of computer linkcommunication (PU connector)Initial setting of computer linkcommunication (RS-485 terminals)Modbus-RTU communicationspecificationsCommunication EEPROM writeselectionPr. 117 to Pr. 124Pr. 331 to Pr. 337,Pr. 341Pr. 331, Pr. 332,Pr. 334, Pr. 343,Pr. 549Refer toPage302316Pr. 342 3034.24.1 Wiring and configuration of PU connectorUsing the PU connector, you can perform communication operation from a personal computer etc.When the PU connector is connected with a personal, FA or other computer by a communication cable, a user programcan run and monitor the inverter or read and write to parameters.(1) PU connector pin-outs8)to1)Inverter(Receptacle side)Front viewPin Number Name Description1) SGEarth (Ground)(connected to terminal 5)2) ⎯ Operation panel power supply3) RDA Inverter receive+4) SDB Inverter send-5) SDA Inverter send+6) RDB Inverter receive-7) SGEarth (Ground)(connected to terminal 5)8) ⎯ Operation panel power supply⋅⋅CAUTIONPins No. 2 and 8 provide power to the operation panel or parameter unit. Do not use these pins for RS-485 communication.Do not connect the PU connector to the computer's LAN board, FAX modem socket or telephone modular connector. Theproduct could be damaged due to differences in electrical specifications.297