... bytesInternal storage area (M area): 32 bytesData Retention CharacteristicConfigure with the programming software: V area, C (counter) areaRetention ... are used to supply power for the real-time clock upon power failure. Under normal temperature, the accumulative ... modes: Programming, Modbus-RTU (slave), Free protocolEquipment Connected with COM PortRS232/RS485: PC (for programming), third-party HMI ...