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

Selection of operation mode and operation location4.23.3 Start command source and frequency command source duringcommunication operation (Pr. 338, Pr. 339, Pr. 550, Pr. 551)When the RS-485 terminals or communication option is used, the external start command and frequencycommand can be made valid. Command source in the PU operation mode can be selected.ParameterNumber338339550 *551 *NameCommunication operationcommand sourceCommunication speedcommand sourceNET mode operationcommand sourceselectionPU mode operationcommand source selectionInitialValue0099992SettingRangeDescription0 Start command source communication1 Start command source external0 Frequency command source communication1 Frequency command source external(1) Select the command source of the network operation mode (Pr. 550)⋅ Either the RS-485 terminals or communication option can be specified as the command source in networkoperation mode.⋅ For example, set Pr. 550 to "1" when executing parameter write, start command or frequency command from theinverter RS-485 terminals in the network operation mode independently of whether the communication option isconnected or not.CAUTION⋅(2) Select the control source of the PU operation mode (Pr. 551)⋅ Either the PU connector or RS-485 terminals can be specified as the source of control in the PU operation mode.⋅ In the PU operation mode, set Pr. 551 to "1" when executing parameter write, start command or frequencycommand through communication from the unit RS-485 terminals.CAUTION⋅⋅fitted*1 The Modbus-RTU protocol cannot be used in the PU operation mode. When using the Modbus-RTU protocol, set Pr. 551 to "2".*2 When the communication option is not fitted, the operation mode cannot be switched to network operation mode.2019999Frequency command source external (Frequency command fromcommunication is valid, frequency command terminal 2 is invalid)The communication option is the command source when NEToperation mode.RS-485 terminals are the command source when NET operationmode.Automatic communication option recognitionNormally, RS-485 terminals are the command source. When acommunication option is mounted, the communication option is thecommand source.1 RS-485 terminals are the command source when PU operation mode2 PU connector is the command source when PU operation mode.3 For manufacturer’s setting. Do not set.The above parameters can be set whenever the communication option is connected. (Refer to page 281.)* Pr 550 and Pr. 551 are always write-enabled.Since Pr. 550 = "9999" (automatic recognition of the communication option) in the initial setting, parameter write, start commandand frequency command cannot be executed by communication using the inverter RS-485 terminals when the communicationoption is fitted. (Monitor and parameter read can be performed.)The PU operation mode has a higher priority when Pr. 550 = "1" (NET mode RS-485 terminals) and Pr. 551 = "1" (PU mode RS-485terminals). When the communication option is not fitted, therefore, the operation mode cannot be switched to network operationmode.Changed setting value is made valid when powering on or resetting the inverter.Pr. 550Setting019999(initialvalue)Pr. 551SettingCommand SourcePU connector RS-485 terminals Communication option1 × PU operation mode *1 NET operation mode *22 (initialvalue)PU operation mode × NET operation mode *21 × PU operation mode *1 ×2 (initialvalue)PU operation mode NET operation mode ×1 × PU operation mode *1 NET operation mode *22 (initialvalue)PU operation mode× NET operation mode *2NET operation mode ×RemarksSwitching to NEToperation mode disabledCommunication optionfittedCommunication option not292