H134-E1-01A E5_N UsersManual (986777), страница 11
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Press the O key for at least three seconds to move from the operationlevel to the initial setting level.100Initial Setting Levelin-tInput type2. Select the “standard or heating/cooling” parameter by pressing the Mkey.5Initial Setting LevelStandard or5-hc heating/coolingstndInitial Setting Level5-hch-cMove to ad-functionamov vancedsetting level3.
Press the U key to set the parameter to h-c.Note The following output assignments do not need to be set because theyare set automatically by changing the control mode, but they areshown here as a reference for checking the assignments for each output.4. Select the “move to advanced function setting level” parameter by pressing the M key.0Advanced Function Setting LevelParameterinit initialization5. Press the D key to enter the password (“−169”), and move from the initialsetting level to the advanced function setting level.offAdvanced Function Setting Level6.
Select the “alarm 1 assignment” parameter by pressing the M key.Control output 1out1 assignmento7. Press the U or D key to set o.(The default is o.)out1o8. Select the “control output 2 assignment” parameter by pressing the Mkey.Control output 2Advanced Function Setting Levelout2 assignmentc-oout2c-o9. Press the U or D key to set c-o.(When h-c is selected for the “standard or heating/cooling” parameter,the setting will be c-o.)41Section 3-6Setting the Set Point (SP)Advanced Function Setting Level10.
Select the “alarm 1 assignment” parameter by pressing the M key.Control output 1alm1 assignmentalm111. Press the U or D key to set alm1.(The default is alm1.)alm1alm1Advanced Function Setting Levelalm212. Select the “alarm 2 assignment” parameter by pressing the M key.Control output 2assignmentalm213. Press the U or D key to set alm2.(The default is alm2.)alm2alm2Input type14. Press the O key for at least one second to move from the advanced function setting level to the initial setting level.PV/SP15. Press the O key for at least one second to move from the initial settinglevel to the operation level.Initial Setting Levelin-t5Operation LevelC251003-6Setting the Set Point (SP)Operation LevelC20The operation level is displayed when the power is turned ON.
The processvalue (PV) is at the top of the display, and the set point (SP) is at the bottom.03-6-1Changing the SP• The set point cannot be changed when the “operation/adjustment protect”parameter is set to 3. For details, refer to 4-9 Using the Key Protect Level.• To change the set point, press the U or D key in the “process value/setpoint” parameter (in the operation level), and set the desired set value.The new set point is selected two seconds after you have specified thenew value.• Multi-SP is used to switch between two or four set points.
For details, referto 4-5 Using Event Inputs for details.Operating ProcedureOperation LevelC30042In this example, the set point is changed from 0°C to 200°C.1. Normally, the “process value/set point” parameter is displayed. The setpoint is 0°C.Section 3-7Using ON/OFF ControlC302. Use the U and D keys to set the set point to 200°C.2003-7Using ON/OFF ControlIn ON/OFF control, the control output turns OFF when the temperature beingcontrolled reaches the preset set point. When the manipulated variable turnsOFF, the temperature begins to fall and the control turns ON again. This operation is repeated over a certain temperature range. At this time, how much thetemperature must fall before control turns ON again is determined by the “hysteresis (heating)” parameter.
Also, what direction the manipulated variablemust be adjusted in response to an increase or decrease in the process valueis determined by the “direct/reverse operation” parameter.3-7-1ON/OFF Control• Switching between 2-PID control and ON/OFF control is performed usingthe “PID ON/OFF” parameter in the initial setting level. When this parameter is set to pid, 2-PID control is selected, and when it is set to onof, ON/OFF control is selected. The default is onof.Hysteresis• With ON/OFF control, hysteresis is used to stabilize operation whenswitching between ON and OFF.
The control output (heating) and controloutput (cooling) functions are set in the “hysteresis (heating)” and “hysteresis (cooling)” parameters, respectively.• In standard control (heating or cooling control), the setting of the “hysteresis (heating)” parameter in the adjustment level is used as the hysteresisregardless of whether the control type is heating control or cooling control.Reverse operationHysteresis (heating)ONPVOFFSet pointThree-positionControl• In heating/cooling control, a dead band (an area where both control outputs are 0) can be set to either the heating or cooling side.
This makes itpossible to use 3-position control.Reverse operationDead bandHysteresis (heating)Hysteresis (cooling)ONHeatingsideCoolingsidePVOFFSet point43Section 3-7Using ON/OFF ControlParametersSymbols-hccntlorevc-dbc-schyschys3-7-2Parameter: LevelStandard or heating/cooling: Initial setting levelPID ON/OFF: Initial setting levelDirect/reverse operation: Initial setting levelDead band: Adjustment levelCooling coefficient: Adjustment levelHysteresis (heating): Adjustment levelHysteresis (cooling): Adjustment levelApplicationSpecifying control methodSpecifying control methodSpecifying control methodHeating/cooling controlHeating/cooling controlON/OFF controlON/OFF controlSettingsTo execute ON/OFF control, set the “set point,” “PID ON/OFF,” and “hysteresis” parameters.Setting the “PID ON/OFF” ParameterOperating ProcedureOperation LevelC25PVConfirm that the “PID ON/OFF” parameter is set to onof in the initial settinglevel.1.
Press the O key for at least three seconds to move from the operationlevel to the initial setting level.100Initial Setting Levelin-tInput typecntlPID•ON/OFF2. The “input type” parameter is displayed in the initial setting level.53. Select the “PID ON/OFF” parameter by pressing the M key.onof4. Check that the set value is onof (i.e., the default).5. To return to the operation level, press the O key for at least one second.Next, set the set point value.Setting the SPOperating ProcedureOperation LevelC25In this example, the set point is set to 200.
The set value (i.e., the SP) isshown at the bottom of the display.1. Select the “process value/set point” parameter in the operation level.PV/SP100C25200442. Use the U and D keys to set the SP. (In this example, it is set to 200.)The new set value can be fixed by pressing the M key, or it will go intoeffect after two seconds have elapsed.Next, set the hysteresis.Determining PID Constants (AT, ST, Manual Setup)Section 3-8Setting the HysteresisOperating Procedure1. Press the O key to move from the operation level to the adjustment level.Operation LevelCSet the hysteresis to 2.0°C.25PVatAT execute/cancel2002.
The “AT execute/cancel” parameter will be displayed in the adjustmentlevel.offChysHysteresis(heating)3. Select the “Hysteresis (heating)” parameter by pressing the M key.1.0Chys2.04. Press the U and D keys to set the hysteresis (2.0 in this example). Either press the M key or wait for at least two seconds after setting the hysteresis value to confirm the setting.5. To return to the operation level, press the O key for at least one second.3-83-8-1Determining PID Constants (AT, ST, Manual Setup)AT (Auto-tuning)at• When AT is executed, the optimum PID constants for the set point at thattime are set automatically.
A method (called the limit cycle method) forforcibly changing the manipulated variable and finding the characteristicsof the control object is employed.• To execute AT, specify on (AT execute), and to cancel AT, specify off (ATcancel).• AT cannot be executed when control has stopped or during ON/OFF control.• The results of AT are reflected in the “proportional band” (P), “integraltime” (I), and “derivative time” (D) parameters in the adjustment level.Adjustment LevelCpProportional bandiIntegral timedDerivative time(023340AT OperationsAT is started when the “AT execute/cancel” parameter is set to ON. Duringexecution, the “AT execute/cancel” parameter on the No. 1 display flashes.When AT ends, the “AT execute/cancel” parameter turns OFF, and the No.
1display stops flashing.45Section 3-8Determining PID Constants (AT, ST, Manual Setup)AT execute/cancelatatoffNo. 1 displayonAT execution in progressIf you move to the operation level during AT execution, the No. 2 displayflashes to indicate that AT is being executed.PV/SPCC2510025100No. 2 displayAT execution in progressOnly the “communications writing,” “RUN/STOP,” “AT execution/cancel,” and“program start” parameters can be changed during AT execution. Otherparameters cannot be changed.Operating ProcedureThis procedure executes auto-tuning (AT).1. Press the O key to move from the operation level to the adjustment level.Adjustment LevelAT execute/at canceloff2.
Press the U key to start execution of AT (auto-tuning).on will be displayed during AT execution.aton3. off will be displayed when AT ends.atoff4. To return to the operation level, press the O key.Operation LevelC25PV03-8-2ST (Self-tuning)stST (auto-tuning) is a function that finds PID constants by using step responsetuning (SRT) when Controller operation begins or when the set point ischanged.Once the PID constants have been calculated, ST is not executed when thenext control operation is started as long as the set point remains unchanged.ST (self-tuning) is enabled when the “ST” parameter is set to ON in the initialsetting level.When the ST function is in operation, be sure to turn the power supply of theload connected to the control output ON simultaneously with or before startingController operation.When executing self-tuning, turn ON power for the load (e.g., heater) at thesame time as or before supplying power to the Digital Temperature Controller.If power is turned ON for the Digital Temperature Controller before turning ONpower for the load, self-tuning will not be performed properly and optimumcontrol will not be achieved.46Section 3-8Determining PID Constants (AT, ST, Manual Setup)NoteOperating ProcedurePID ConstantsWhen control characteristics are already known, PID constants can be setdirectly to adjust control.
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