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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 34.(See note 1.)(See note 2.)The characters displayed in reverse video are the initial values.3s min.3s min.When performing settings with operation keys only, set pin1 of the DIP switch to OFF (factory setting).If pin 1 of the DIP switch is set to ON, the setting items indicated bywill not be displayed.Set each setting item using thekeys.Tachometeroutputmode(HI-LO)(AREA)(HI-HI)(LO-LO)Countingspeed(30Hz)(10kHz)Decimalpointposition(No decimalpoint)Function setting modePrescalevalue(0.001)∼(One digitafter decimalpoint)(1.000)∼(Two digitsafter decimalpoint)(Three digitsafter decimalpoint)(99.999)Averageprocessing(No average processing)Auto-zerotime(Averageof 2 measurements)(0.1s)∼(99.9s)(0.0s)∼(99.9s)Startuptime(Averageof 4 measurements)(Averageof 8 measurements)NPN/PNPinput mode(NPNinput)(PNPinput)(Red)(Green)Displaycolor(Red-green) (Green-red)OutputallocationNote: Displayed for H7CX-AU@ modelsKey protectlevel(KP-1)(KP-2)Multifunction Preset Counter(KP-3)(KP-4)(KP-5)H7CX-A (Tachometer Function)31Explanation of FunctionsTachometer Output Mode (totm) (Setting possible usingDIP switch.)Set the output method for control output based on the OUT1/OUT2set value.
Upper and lower limit (HI-LO), area (AREA), upper limit(HI-HI), and lower limit (LO-LO) can be set. (For details on the operation of the output modes, refer to Output Mode Settings on page 35.)Counting Speed (cnts) (Setting possible using DIPswitch.)Set the maximum counting speed (30 Hz/10 kHz) for CP1 input. Ifcontacts are used for input signals, set the counting speed to 30 Hz.Processing to eliminate chattering is performed for this setting.Decimal Point Position (dp)Decide the decimal point position for the measurement value, OUT1set value, and OUT2 set value.Prescale Value (pscl)It is possible to display the rate of rotation or the speed of a device ormachine to which the H7CX is mounted by converting input pulses toa desired unit.
If this prescaling function is not used, the input frequency (Hz) will be displayed.Auto-zero Time (aut=)It is possible to set the H7CX so that if there is no pulse for a certaintime 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 99.9 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)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 and rotating body are turned ON at the sametime.DisplayThe relationship between display and input is determined by the following equation. Set the prescale value according to the unit to bedisplayed.Startup timeComparisonvalue(lower limit)Displayed value = f × af: Input pulse frequency (number of pulses in 1 second)a: Prescale valueTimePower supply1. Displaying Rotation RateDisplay unitOutput(lower limit)Prescale value (a)rpm1/N × 60rps1/NNPN/PNP Input Mode (imod)N: 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.Display Color (colr)2. Using the formula, set the prescale value to 1/N × 60 =60/5 = 12.Set the color used for the measurement value.2. Displaying SpeedDisplay unitπd × 1/N × 60m/sπd × 1/NSettingredgrnr-gPrescale value (a)m/minControl output OFFControl output ONRed (fixed)Green (fixed)Measured value displayedin red when both control(See noteoutputs 1 and 2 are OFF.1.)N: Number of pulses per revolutiond: Diameter of rotating body (m)πd: Circumference (m)Measured value displayedin green when either controloutput 1 or control output 2is ON.Measured value displayed Measured value displayedin green when both control in red when either control(See noteoutput 1 or control output 2outputs 1 and 2 are OFF.2.)is ON.g-rd: Diameter ofrotating bodyAverage Processing (aug) (Setting possible using DIPswitch.)Flickering 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.32Select either NPN input (no-voltage input) or PNP input (voltageinput) as the input format. The same setting is used for all externalinputs. For details on input connections, refer to Input Connectionson page 11.Multifunction Preset Counter H7CX-ANote: 1. If the tachometer output mode is set to AREA, however, themeasured value is displayed in red when control output 1 isOFF and in green when control output 1 is ON.2. If the tachometer output mode is set to AREA, however, themeasured value is displayed in green when control output 1is OFF and in red when control output 1 is ON.(Tachometer Function)Output Allocation (otst)When using H7CX-AU@ models as 2-stage counter, each output canbe flexibly allocated to either stage 1 or 2.Transistor output placed for SV1 and contact output for SV2 or viceverse, as in the following table.H7CX-AU/-AUD1OUT1offonOUT2Transistor (12-13)Contact (3, 4, 5)Contact (3, 4, 5)Transistor (12-13)H7CX-AUSD1OUT1OUT2offTransistor (12-13)Transistor with diode(3, 4, 5)onTransistor with diode(3, 4, 5)Transistor (12-13)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 indicator is lit while the key-protect switch is set to ON. Confirm the ON/OFF status of the keyprotect switch after the H7CX is mounted to the panel.(See note)OFFONNote: Factory-set to OFFKey protect indicatorLevelMeaningDetailsChanging mode(See note.)Switching displayduring operationReset keyUp/down key (Up key for6-digit models)KP-1 (default setting)NoYesYesYesKP-2NoYesNoYesKP-3NoYesYesNoKP-4NoYesNoNoKP-5NoNoNoNoNote: Changing mode to configuration selection mode ( MODE +11 s min.) or function setting mode ( MODE 3 s min.).Multifunction Preset CounterH7CX-A (Tachometer Function)33Operation in Run ModeSet values for each digit as required using theMeasurement valueMeasurement valueOUT1 set valuekey.Measurement ValueDisplays the currently measured value.OUT1/OUT2 Set ValueSet OUT1 set value and OUT2 set value.
Themeasurement value is compared to OUT1 set valueand OUT2 set value and output is made according tothe selected output mode.Measurement valueOUT2 set valueSelf-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 ≤ 999999e1Not litCPUEither press the reset key or reset the No changepower supply.e2Not litMemory error (RAM)OFFReset the power supply.e2sumMemory error (EEP)(See note 1.)OFFReset to the factory settings using the 0reset 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).34Multifunction Preset Counter H7CX-A(Tachometer Function)No changeNo changeOutput Mode SettingsOutputmodesettingUpperandlowerlimit(HI-LO)(Upper-limit) OUT2 set valueMeasurement value(Lower-limit) OUT1 set valueOUT1OUT2ON condition for OUT1: measurement value ≤ OUT1 set valueON condition for OUT2: measurement value ≥ OUT2 set valueArea(AREA)OUT2 set valueMeasurement valueOUT1 set valueOUT1OUT2ConditionUpperlimit(HI-HI)OUT1 set value ≤ OUT2 set valueOUT1 set value > OUT2 set valueONOUT1 set value ≤ measurement value ≤ OUT2 setcondition valuefor OUT1OUT2 set value ≤ measurement value ≤ OUT1 setvalueONmeasurement value < OUT1 set valuecondition orfor OUT2 measurement value > OUT2 set valuemeasurement value < OUT2 set valueormeasurement value > OUT1 set value(Upper-limit) OUT2 set valueMeasurement value(Upper-limit) OUT1 set valueOUT1OUT2ON condition for OUT1: Measurement value ≥ OUT1 set valueON condition for OUT2: Measurement value ≥ OUT2 set valueLowerlimit(LO-LO)(Lower-limit) OUT2 set valueMeasurement value(Lower-limit) OUT1 set valueOUT1OUT2ON condition for OUT1: Measurement value ≤ OUT1 set valueON condition for OUT2: Measurement value ≤ OUT2 set valueMultifunction Preset CounterH7CX-A (Tachometer Function)35■ Operation in Configuration Selection ModeSelect which H7CX configuration is used (i.e., 1-stage counter, 2-stage counter, total and preset counter, batch counter, dual counter, or tachometer) in configuration selection mode.
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