HANYOUNG NUX DX Series Instruction Manual

Also see for DX Series: Instruction manual

Contents

HANYOUNG NUX DX Series Instruction Manual Manual pdf 3 page image

3[ ] [ ] [ ] [ ]Deviation alarm/Process alarmSV display unitPV display unitAlarm mode selectableRetransmission Output (Option)Hold function of alarm selectableSet Description0 Deviation alarm1 Process alarmSet Description0 Band alarm1 High and Low alarmSet Description0 With retransmission output1 NoneSet Description0 With hold function1 Without hold functionSet Description1 ℃[ ] [ ] [ ] [ ]Indicator / ControllerSV display unitPV display unit℃Decimal point selectableOutput (Fixed)Set Description0 Indicator1 ControllerSet Description0 Decimal point1 NoneSet Description0 Current output1 Relay or voltage pulse output※ ALH & ALL will be initialized if you change the deviation alarm orprocess alarm at the SL3※ For DCV input, if SL12 and SL13 are changed, the parameters related to temperature are initialized.▒ Control loop break alarm (LBA) function●Setting procedureUsually set the set-value of the LBA to a value of twice the integral time (I).The LBA can also be set by the auto-tuning (AT) function. In this case,the set-value is automatically set to a value of twice the integral time (I).●Description of operationLBA function starts to measure the time from the moment when thecontrol output becomes 0% or 100%, and it detects the variation of theprocess value in LBA setting time and then it determines that LBA isON or OFF by the variation.• The LBA is ON if the process value is not increasing more than 2 ℃within the LBA set-vale when the control output is 100%.(In direct operation, the LBA is ON if the process value is notdecreasing more than 2 ℃.)• The LBA is ON if the process value is not decreasing more than 2 ℃within the LBA set-vale when the control output is 0%.(In direct operation, the LBA is ON if the process value is notincreasing more than 2 ℃.)●Causes of actionThe LBA is activated under the following conditions.•Controlled object trouble : Heater break, no power supply, incorrectwiring, etc.•Sensor trouble : Sensor disconnected, shorted, etc.•Actuator trouble : Burnt relay contact, incorrect wiring, relay contactnot closed, etc.•Output circuit trouble : Burnt internal relay contact, relay contact notopen or closed, etc.•Input circuit trouble : The process-value does not change even if inputchanges, etc.※ If causes of the above trouble cannot be identified, check the controlsystem.●Cautions for control loop break alarm (LBA) function•The LBA function is activated only when the control output is 0 % or100 %. Therefore, the time from trouble occurrenece till the activationof the LBA function equals the time of when the control outputbecomes 0 % or 100 % plus the LBA setting time.• No LBA function is activated while the auto-tuning (AT) function isactivated.• The LBA function is influenced by disturbances (heat sources, etc)and as a result may be activated even if there is no trouble in thecontrol system.•If LBA setting time is too short or does not match the controlledobject, the LBA may be turned ON/OFF or not be turned ON. In suchcase, set the setting time of LBA to be slightly longer.PV displayunit Description SV display unit(Setting range) RemarkDecimal pointpositionselection 0 ~ 4 If you want 000.0, set0002 on SV display unit.Inputcorrection -100 ~ 100 % of FSHysteresis ofhigh alarm(ALH) 0 ~ 10 % of FSMax. value oftemperaturesetting rangeWithin inputrange Refer to input typetableMin. value oftemperaturesetting rangeWithin inputrange Refer to input typetableControloperationdirection 0, 1 0 : Reverse operation1 : Direct operationHysteresis oflow alarm (ALL) 0 ~ 10 % of FSInput filter 0 ~ 100 secondMax. inputscale setting 9999 Only for voltage inputMin. inputscale setting -1999 Only for voltage inputDelay time ofhigh alarm(ALH) 0 ~ 100 secondDelay time oflow alarm(ALL) 0 ~ 100 secondMain functions

/ 6

Related manuals for HANYOUNG NUX DX Series