7 Product-specific CAN objects XN300 slice modules7.25 XN-322-1CNT-8DIO340 Gateway XN-312-GW-CAN 06/16 MN050003-EN www.eaton.euExampleIf a value of 255 (dec) is loaded onto the idle clock prescaler, this will yield anidle reference time of 8 μs. This corresponds to an f IDS of 125490 Hz.A lower value for the IdleClockPreScaler will make it possible to obtain moreaccurate speed measurements at higher speeds. On the other hand, a highervalue will increase the measuring accuracy at low speeds.7.25.11 System Clock Frequency (Object 0x40F4)Object 0x40F4 delivers the internal module system clock frequency in MHz.Design of the data bytes:Internal clock frequency: 32 MHz (20 hex).7.25.12 Encoder Measuring Value SDO (Object 0x40F5)Object 0x40F5 transmits the measured value, the number of pulses counted(like object 0x30F2), as an SDO.IdleClock = 32000000 Hz = 125490 Hz255Feature Description / Value EDSName SystemClock [MxSubExt40F4]ParameterName=SystemClockObjectType=0x7DataType=0x0005AccessType=roPDOMapping=0Count=1Description System Clock FrequencyObject Code ARRAYMapping SDOData type UNSIGNED8Sub index 01 … FE hexAccess roByte 0:Sub index1≦n≦254B7B6B5B4B3B2B1B0System Clock Frequency in MHz
