H134-E1-01A E5_N UsersManual (986777), страница 26
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During analog input, it depends on the “decimal point” parameter setting.Setting rangeUnitSP lower limit to SP upper limitEUDefault0Setting■ Related ParametersSeeProcess value/set point (operation level): Page 120Input type (initial setting level): Page 146Number of multi-SP uses: Page 159, Event input 1 assignment and Eventinput 2 assignment, Page 160, Multi-SP uses: Page 160 (advance functionsetting level)insThe “input type” parameter must beset for a thermocouple or resistancethermometer, and the “input shifttype” parameter must be set to aone-point shift.Temperature Input ShiftSometimes an error occurs between the set point and the actual temperature.To offset this, a compensated value can be obtained by adding an input shiftvalue to the input. The compensated value is displayed as the measurementvalue and used for control.The entire input range is shifted by a fixed rate (1-point shift).
If the input shiftvalue is set to −1°C, control will be performed for a value 1°C lower than themeasured temperature.FunctionSetting rangeUnit−199.9 to 999.9°C or °FDefault0.0Setting■ Related ParametersSeeInput type (initial setting level): Page 146Input shift type (advanced function setting level): Page 172136Section 5-4Adjustment LevelinshUpper-limit Temperature Input Shift ValueinslLower-limit Temperature Input Shift ValueThe “input type” parameter must beset for a thermocouple or resistancethermometer and the “input shifttype” parameter must be set to a 2point shift, or the “input type” parameter must be set for an infrared sensor.These parameters are used to shift the input temperature at two points: anupper-limit temperature and a lower-limit temperature (as opposed to the“temperature input shift” parameter, which shifts the input temperature by setting the shift for only one point).
A 2-point shift enables more accurate offset ofthe input range compared with a 1-point shift if the input shift values at theupper and lower limits differ.This parameter sets input shift values for the upper and lower limits (2-pointshift) of the input range.FunctionSetting range−199.9 to 999.9Unit°C or °FDefault0.0Setting■ Related ParametersSeeInput type (initial setting level): Page 146Input shift type (advanced function setting level): Page 172137Section 5-4Adjustment LevelpidProportional BandIntegral TimeDerivative TimeThe control must be set to 2-PIDcontrol.These parameters set PID control constants. PID constants are automaticallyset when AT or ST is executed.P action: Refers to control in which the MV is proportional to the deviation(control error).I action: Refers to a control action that is proportional to the time integral ofthe deviation. With proportional control, there is normally an offset(control error).
Proportional action is thus used in combination withintegral action. As time passes, this control error disappears, andthe control temperature (process value) comes to agree with the setpoint.FunctionD action: Refers to a control action that is proportional to the time derivative ofthe control error. The proportional control and integral control correct for errors in the control result, and thus the control system islate in responding to sudden changes in temperature. The derivativeaction increases the MV in proportion to the slope of the change inthe temperature as a corrective action.ParametersProportionalbandSettingModelsControllers with Thermocouple/Resistance Thermometer MultiinputsControllers with Analog InputsIntegral timeDerivative timeNoteSetting rangeUnitDefault0.1 to 999.9°C or °F(See note1.)%FS8.00 to 3999RT is OFF.0 to 3999SecondSecond23340RT is ON.0.0 to 999.9 Second40.010.0(1) Set “none” as the unit for Controllers with Analog Inputs.(2) If the settings for RT (robust tuning) are changed, the proportional band(P), integral time (I), and derivative time (D) will be initiated.■ Related ParametersSee138AT execute/cancel (adjustment level): Page 131Section 5-4Adjustment Levelc-scThe control must be heating/coolingcontrol and 2-PID control.Cooling CoefficientIf the heating characteristics and cooling characteristics of the control objectare very different and good control characteristics cannot be achieved with thesame PID constants, the cooling coefficient can be used to adjust the proportional band (P) for the control output assigned to the cooling side.In heating/cooling control, the proportional band P for the cooling control output is calculated using the following formula to set the cooling coefficient:Cooling control output side P = Cooling coefficient × P (proportional band)FunctionSetting range0.01 to 99.99UnitNoneDefault1.00Setting■ Related ParametersSeec-dbProportional band (adjustment level): Page 138Dead BandThe control system must be set toheating/cooling control.This parameter sets the output dead band width for heating/cooling control.
Anegative setting sets an overlapping band.• This parameter sets an area in which the control output is 0 centeringaround the set point for a heating/cooling control.• During temperature input, the decimal point position depends on the currently selected sensor, and during analog input it depends on the “decimalpoint” parameter setting.FunctionModelControllers with Thermocouple/Resistance Thermometer Multi-inputsControllers with Analog InputsSettingNoteSetting range−199.9 to 999.9−19.99 to 99.99Unit°C or °F(See note.)%FSDefault0.00.00Set “none” as the unit for Controllers with Analog Inputs.139Section 5-4Adjustment Levelof-rThe control must be standard controland 2-PID control.The “integral time” parameter mustbe set to 0.Manual Reset Value• This parameter sets the required manipulated variable to remove offsetduring stabilization of P or PD control.FunctionSetting range0.0 to 100.0Unit%Default50.0Setting■ Related ParametersSeeIntegral time (adjustment level): Page 138PID ON/OFF (initial setting level): Page 149hysHysteresis (Heating)chysHysteresis (Cooling)The control must be ON/OFF control.For the “hysteresis (cooling)” parameter, the control must be heating/cooling control.This parameter sets the hysteresis for ensuring stable operation at the ON/OFF switching point.• For standard control, use the “hysteresis (heating)” parameter.
The “hysteresis (cooling)” parameter cannot be used.• For heating/cooling control, the hysteresis can be set independently forheating/cooling. The “hysteresis (heating)” parameter is used for the heating side, and the “hysteresis (cooling)” parameter is used for the coolingside.FunctionParametersHysteresis(heating)ModelControllers with Thermocouple/ResistanceThermometer Multi-inputsSetting range0.1 to 999.9Unit°C or °F(See note.)Default1.0Hysteresis(cooling)Controllers with Analog InputsControllers with Thermocouple/ResistanceThermometer Multi-inputsControllers with Analog Inputs0.01 to 99.990.1 to 999.9%FS°C or °F(See note.)%FS0.101.0SettingNote0.01 o 99.990.10Set “none” as the unit for Controllers with Analog Inputs.■ Related ParametersSee140PID ON/OFF, Standard or heating/cooling (initial setting level): Page 149Section 5-4Adjustment LevelsoakThe “program pattern” parametermust not be set to OFF.Soak Time• This parameter sets the time for the control operation when using the simple program function.FunctionSetting range1 to 9999Unitmin or hDefault1Setting■ Related ParametersSeeProgram start, Soak time remain (operation level): Page 123Wait band (adjustment level): Page 141Program pattern (initial setting level): Page 151Soak time unit (advanced function setting level): Page 181wt-bThe “program pattern” parametermust not be set to OFF.Wait Band• This parameter sets the stable band within which the soak time is measured for the simple program function.FunctionSettingNoteModelControllers with Thermocouple/Resistance Thermometer Multi-inputsSetting rangeOFF or 0.1 to999.9Unit°C or °F(See note.)Controllers with Analog InputsOFF or 0.01 to99.99%FSDefaultoffSet “none” as the unit for Controllers with Analog Inputs.■ Related ParametersSeeProgram start, Soak time remain (operation level): Page 123Soak time (adjustment level): Page 141Program pattern (initial setting level): Page 151Soak time unit (advanced function setting level): Page 181141Section 5-4Adjustment Levelmv-sThe control must be set to 2-PIDcontrol.The “MV at stop and error addition”parameter must be ON.MV at Stop• This parameter sets the MV to use when the RUN/STOP status changesfrom RUN to STOP.FunctionSetting rangeSetting−5.0 to 105.0 for standard control−105.0 to 105.0 (heating/cooling control)Unit%Default0.0■ Related ParametersSeeRUN/STOP (operation level): Page 124MV at stop and error addition (advance function setting level): Page 173mv-eThe control must be set to 2-PIDcontrol.The “MV at stop and error additionparameter must be ON.MV at PV Error• This parameter sets the MV to use when an input error occurs.FunctionSetting range−5.0 to 105.0 for standard control−105.0 to 105.0 (heating/cooling control)Unit%Default0.0Setting■ Related ParametersSee142MV at stop and error addition (advance function setting level): Page 173Section 5-4Adjustment LevelsprtThe “ST” parameter must be set toOFF.SP Ramp Set Value• This parameter sets the rate of change during SP ramp operation.
Set themaximum permissible change width per unit of time as the SP ramp setvalue. The SP ramp function is disabled if this parameter is set to OFF.Function• During temperature input, the decimal point position of the SP ramp setvalue is dependent on the currently selected sensor, and during analoginput it is dependent on scaling.Setting rangeOFF or 1 to 9999UnitEU/s or EU/minuteDefaultoffSetting■ Related ParametersSeeInput type: Page 146, Scaling upper limit, Scaling lower limit, Decimal point(initial setting level): Page 148, ST: Page 150 (initial setting level)SP ramp time unit (advance function setting level): Page 161ol-hMV Upper Limitol-lMV Lower LimitFunctionSettingThe control must be set to 2-PIDcontrol.The “ST” parameter must be set toOFF.• The “MV upper limit” and “MV lower limit” parameters set the upper andlower limits of the manipulated variable.
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