5-216 N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUALCONTROL ELEMENTS CHAPTER 5: SETTINGS5Figure 5-109: Digitizer output characteristicThe output integer number is represented by eight FlexLogic operands encoding the input value per the followingconvention:Eq. 5-20The output operands can be configured to drive relay outputs, such as remote outputs, direct outputs, contact outputs, orany combination of these, in order to relay the analog quantity to other UR-series IEDs for further processing.The digitizer averages the signal prior to digitization for increased accuracy. The extra filtering is in effect only understeady-state conditions or during slow changes of the input value. When the input signal changes significantly, thefiltering is removed to maintain the response speed of the element.For critical applications, ensure the validity of the digitizer input signal to prevent an undesired response of the relayingsystem. For example, configuring the VT fuse failure condition when the digitizer uses the voltage signal.The digitized output value is available as an actual value for testing, troubleshooting, and special applications (see theACTUAL VALUES METERING DIGITIZERS values for details).DIGITIZER 1 SOURCE — This setting specifies an internal analog value to be digitized. A variety of analog actual values(FlexAnalog parameters) such as power, current amplitude, voltage amplitude, power factor, and so on, can be configuredas the digitizer source. Refer to Appendix A for a complete list of FlexAnalog parameters available for the N60.DIGITIZER 1 LIMIT— This setting allows setting symmetrical limits for the input signal. The input signal is truncated to aninterval from –LIMIT to +LIMIT before the effective digitization. The base units are defined in the exact manner asFlexElements (see the FlexElements section for details).Figure 5-110: Digitizer logic842741A2.CDRSOURCEDIGITIZEDVALUE-LIMITLIMITFULL SCALE127–127N out 1– b 72 6 b 6 2 5 b 5 2 4 b 4 2 3 b 3 2 2 b 2 2 1 b 1 2 0 b 0+ + + + + + =842015A3.CDRDIGITIZER 1 LIMIT:DIGITIZER 1 SOURCE:SETTINGSETTINGSFLEXLOGIC OPERANDSACTUAL VALUEOff=0DIGITIZER 1 BIT 0 LSBDIGITIZER 1 BIT 2DIGITIZER 1 BIT 4DIGITIZER 1 BIT 6 MSBDIGITIZER 1 OutDIGITIZER 1 BIT 1DIGITIZER 1 BIT 3DIGITIZER 1 BIT 5DIGITIZER 1 BIT 7 SIGNDIGITIZER 1 FUNCTION:RUNSETTINGEnabled=1
