... set via analog 0~10V, 0~20mA, operation key board, RS485 communication, UP/DOWN and so on.Other Functions PID ControlInternal ... PID controlRS485Standard Modbus RS485 communicationFrequency SettingThe frequency can be set via analog 0~10V ... , 0~20mA, operation key board, RS485 communication, UP/DOWN and so on.Multi-Speed6 input terminals ...