... (M area): 32 bytesData Retention CharacteristicConfigure with the programming software: V area, C (counter) areaRetention Mode and ... COM Port1, RS232 or RS485;Supported working modes: Programming, Modbus-RTU (slave), Free protocolEquipment Connected with ... COM PortRS232/RS485: PC (for programming), third-party HMI panel, third-party serial communication ...