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For details, refer to page 56.Note: 1. The characters displayed in reverse video are the defaultsettings.2. Changes in DIP switch settings are enabled when the poweris turned ON.Tachometer H7CX-ROutput modeUpper and lower limitONOFFAreaOFFONUpper limitONONLower limitPin 5OFF7Pin 4OFFRefer to the table on the right.650Pin 3OFFPin 6Average processingOFFOFF (no average processing)ONOFF2 timesOFFON4 timesONON8 times■ Settings for Advanced FunctionsSettings that cannot be performed with the DIP switch are performed with the operation keys.Note: 1. If the mode is switched to the function setting mode during operation, operation willcontinue.2.
Changes made to settings in function setting mode are enabled for the first time whenthe mode is changed to run mode. Also, when settings are changed, the counter is reset (measured values initialized and output turned OFF) on returning to run mode.Run modePower ONFor details on operations in run mode, refer to page 54.(See note 1.)3s min.(See note 2.)3s min.The characters displayed in reverse video are the initial values.Decimalpointposition(DP)Set the decimal point position using theFunction setting mode(No decimalpoint)Prescalevalue(PSCL)∼(1.000)∼∼∼(KP-1)key.(99.9s)Set the key protect level with theKey protectlevel(KYPT)key.(999.9s)Set the value of each corresponding digit with the(0.0s)key.(99.999)Set the value of each corresponding digit with the(0.1s)Startuptime(STMR)(Three digitsafter decimalpoint)(Two digitsafter decimalpoint)Set the value of each corresponding digit with the(0.001)Auto-zerotime(AUTZ)(One digitafter decimalpoint)key.(KP-2)(KP-3)key.(KP-4)(KP-5)TachometerH7CX-R51■ Explanation of FunctionsBasic Functions2.
Displaying Speed(setting is performed with DIP switch)Display unitCounting SpeedSet the maximum counting speed (30 Hz/10 kHz) for input. If contacts are used for input signals, set the counting speed to 30 Hz. Processing to eliminate chattering is performed for this setting.Output ModePrescale value (a)m/minπd × 1/N × 60m/sπd × 1/NN: Number of pulses per revolutiond: Diameter of rotating body (m)πd: Circumference (m)Set the output method for control output based on the comparisonvalue. Upper and lower limit (HI-LO), area (AREA), upper limit (HI),and lower limit (LO) can be set. (For details on the operation of theoutput modes, refer to Output Mode Settings on page 55.)Average ProcessingFlickering display and output chattering can be prevented using average processing (simple averaging).
Average processing can be set toone of four levels: no average processing, 2 times (i.e., the averageof 2 measurement values), 4 times, or 8 times. The measurementcycle will be equal to the sampling cycle (200 ms) multiplied by theaverage processing setting (i.e., the number of times).
Average processing enables fluctuating input signals to be displayed stably. Setthe optimum number of times for the application.NPN/PNP Input ModeSelect either NPN input (no-voltage input) or PNP input (voltageinput) as the input format. When using a two-wire sensor, select NPNinput. The same setting is used for all external inputs. For details oninput connections, refer to Input Connections on page 47.d: Diameter ofrotating bodyNote: If the prescale value setting is incorrect, a counting error will occur. Check that the settings are correct before using this function.Auto-zero Time (aut=)It is possible to set the H7CX-R so that if there is no pulse for a certain time the display is force-set to 0.
This time is called the auto-zerotime.Note: Set the auto-zero time to a time slightly longer than the estimated interval between input pulses and within the setting range(0.1 to 999.9 s). It will not be possible to make accurate measurements if the auto-zero time is set to a time shorter than theinput pulse cycle. Setting a time that is too long may also resultin problems, such as a time-lag between rotation stopping andthe alarm turning ON.Startup Time (stmr)Advanced Functions(setting is performed with operation keys)Decimal Point Position (dp)Decide the decimal point position for the measurement value andcomparison value.Prescale Value (pscl)In order to prevent undesired output resulting from unstable inputimmediately after the power supply is turned ON, it is possible to prohibit measurement for a set time (0.0 to 99.9 s), the startup time.
Itcan also be used to stop measurement and disable output until therotating body reaches the normal rate of rotation, after the powersupply to the H7CX-R and rotating body are turned ON at the sametime.DisplayIt is possible to display the rate of rotation or the speed of a device ormachine to which the H7CX-R is mounted by converting input pulsesto a desired unit. If this prescaling function is not used, the input frequency (Hz) will be displayed.Comparisonvalue(lower limit)The relationship between display and input is determined by the following equation.
Set the prescale value according to the unit to bedisplayed.Displayed value = f × af: Input pulse frequency (number of pulses in 1 second)a: Prescale value1. Displaying Rotation RateDisplay unitPrescale value (a)rpm1/N × 60rps1/NN: Number of pulses per revolutionExample: In order to display the rate of rotation for a machine thatoutputs 5 pulses per revolution in the form @@.@ rpm:1. Set the decimal point position to 1 decimal place.2. Using the formula, set the prescale value to 1/N × 60 =60/5 = 12.52Tachometer H7CX-RStartup timeTimePower supplyOutput(lower limit)Key Protect Level (kypt)Set the key protect level.When the key-protect switch is set to ON, it is possible to prevent setting errors by prohibiting the use of certain operation keys by specifying thekey protect level (KP-1 to KP-5).
The key protect level is set in the function setting mode. The key protect indicator is lit while the key-protectswitch is set to ON. Confirm the ON/OFF status of the key-protect switch after the H7CX is mounted to the panel.(See note) OFF ONNote: Factory-set to OFFKey protect indicatorLevelMeaningDetailsChanging mode(See note.)Switching displayduring operationHold keyUp keyKP-1 (default setting)NoYesYesYesKP-2NoYesNoYesKP-3NoYesYesNoKP-4NoYesNoNoKP-5NoNoNoNoNote: Changing mode to DIP switch monitor mode or function setting mode.TachometerH7CX-R53■ Operation in Run ModeSet the values for each digit as required using thekey.Output Mode: HI or LOMeasurement valueMeasurement valueComparison valueMeasurement ValueDisplays the currently measured value.Comparison ValueSet comparison value.
The measurement value iscompared to comparison value and output is madeaccording to the selected output mode.Output Mode: HI-LO or AREAMeasurement valueMeasurement ValueDisplays the currently measured value.Measurement valueComparison value 1Measurement valueComparison value 254Tachometer H7CX-RComparison Value 1/Comparison Value 2Set comparison value 1 and comparison value 2. Themeasurement value is compared to comparison value 1and comparison value 2 and output is made accordingto the selected output mode.■ Output Mode SettingsOutputmodesettingUpperandlowerlimit(HI-LO)Comparison value 2(Upper-limit)Measurement valueComparison value 1(Lower-limit)OUTON condition: measurement value ≤ comparison value 1 or measurement value ≥ comparison value 2Note: When comparison value 1 ≥ comparison value 2, the output is always ON regardless of thecomparison value.Area(AREA)Comparison value 2Measurement valueComparison value 1OUTConditionComparison value 1 ≤ Comparison value 2ONComparison value 1 ≤ measurement value ≤condition Comparison value 2Upperlimit(HI)Comparison value 1 > Comparison value 2Comparison value 2 ≤ measurement value ≤Comparison value 1Comparison value(Upper-limit)Measurement valueOUTON condition: Measurement value ≥ Comparison valueLowerlimit(LO)Measurement valueComparison value(Lower-limit)OUTON condition: Measurement value ≤ Comparison value■ Hold FunctionThe measurement value (display value) and output are sustained while the hold input is ON.ExampleOutput modesettingLower limit(LO)OperationHold input(Hold Key)Actual inputDisplay valueComparison value(Lower-limit)Sustained display valueSustained outputOUTTachometerH7CX-R55■ Self-diagnostic FunctionThe following displays will appear if an error occurs.Main displaySub-displayErrorOutput statusCorrection methodSet value afterresetffffff(See note 3.)No changeMeasurement value overflow No change(See note 2.)Measurement value ≤ 999999No changee1Not litCPUEither press the hold key or reset thepower supply.No changee2Not litMemory error (RAM)OFFReset the power supply.No changee2sumMemory error (EEP)(See note 1.)OFFReset to the factory settings using the 0hold key.OFFNote: 1.
Includes the case where the EEPROM has reached its overwrite lifetime.2. Occurs when the measurement value reaches 999,999.3. Display flashes (1-second cycles).■ Operation in DIP Switch Monitor ModeThe H7CX-R is also equipped with a DIP switch monitor function, a convenient function that enables the settings of the DIP switch pins to be confirmed using the front display.Measurement stoppedMeasurement possiblePower ONTACHOMETERRun ModeHLD1HLD+1To change the mode to DIP switch monitor mode, press theKey for 1 s min. with the 1 key held down.
The mode will notchange if the 1 key is pressed first.(See note.)DIP Switch Monitor Mode1 s min.DIP switchmonitorThe status of the DIP switch pins (1 to 8) can be confirmed using thekeys.Example12345678ONOFFIndicates that DIP switch pin 8 is ON.Indicates that DIP switch pin 7 is OFF.Indicates that DIP switch pin 6 is ON.Indicates that DIP switch pin 5 is OFF.Indicates that DIP switch pin 4 is ON.Indicates that DIP switch pin 3 is OFF.Indicates that DIP switch pin 2 is ON.Indicates that DIP switch pin 1 is OFF.Note: When the mode is changed to DIP switch monitor, the measurement value is reset, outputs turns OFF, and measuring stops.56Tachometer H7CX-RAdditional Information■ Key Operation FlowchartMeasurement stoppedPower ON+Measurement possible11 s min.3 s min.Run modeDIP switch monitor mode+Function setting mode11 s min.Output Mode: HI or LO3 s min.Decimal point positionDIP switch monitorMeasurement valuePrescale valueMeasurement value,Comparison valueAuto-zero timeOutput Mode: HI-LO or AREAStartup timeMeasurement valueKey protect levelMeasurement value,Comparison value 1Measurement value,Comparison value 2Note: All setting changes are performed using thekey.TachometerH7CX-R57■ Lists of SettingsRun ModeParameter nameMeasurement valueParameter---Setting range0 to 999999Default value0Unit-----Measurement value,Comparison valueMeasurement value ---0 to 9999990---Comparison value0 to 9999990---Measurement value,Comparison value 1Measurement value ---0 to 9999990---Comparison value 1 ---0 to 9999990---Measurement value,Comparison value 2Measurement value ---0 to 9999990---Comparison value 2 ---0 to 9999990------Set value--------Function Setting ModeParameter nameParameterSetting rangeDefault valueUnitDecimal point position dp------/-----.-/----.--/---.---Prescale valuepscl0.001 to 99.9991.000---Auto-zero timeaut=0.1 to 999.9999.9s---------Startup timestmr0.0 to 99.90.0sKey protect levelkyptkp-1/kp-2/kp-3/kp-4/kp-5kp-1---58Tachometer H7CX-RSet valueSafety Precautions (Common)Note: The following precautions are common for all H7CX models.CAUTIONLoose screws may occasionally result in fire or malfunction.Tighten the terminal screws securely.
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