Omega CN4321 Скачать руководство пользователя страница 67 | Manualshive

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Omega CN4321 Скачать руководство пользователя страница 67

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APPENDIX B

Manual Tuning

Tune the controller if any of the following occurs:

•

The controller is installed in a new system

•

The controller is used as a replacement in an existing system

•

The input sensor is relocated or changed

•

The output device is relocated or changed

•

The setpoint is significantly changed

•

Any other condition that will alter the dynamics of the system

Proportional Band

The proportional band is a band around the setpoint of the CN4431
where the output is between 0% and 100%. The percentage of output is
proportional to the amount of error between the setpoint variable (SV)
and the process variable (PV). Outside of the proportional band the out-
put is either 0% or 100%
The proportional band on CN4321/CN4431 is equidistant from the main
setpoint as illustrated below.

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Содержание CN4321

Страница 1: ...uy your excess underutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing R...

Страница 2: ...Front Panel Operation 17 CN4431 Model Configuration 19 Specifications 20 Outer Dimensions and Panel Cutout Size 25 Installation 26 Wiring Instructions 27 System Wiring Diagrams 32 Front Panel Descript...

Страница 3: ...low deviation or zone alarm The CN4321 is a 1 32 DIN controller that has a single digital display It is available with either single or dual outputs dual output models can be used for heat cool heat h...

Страница 4: ...t panel Programmable 8 segment ramp soak function Digital filtering to suppress factory noise Adjustable setpoint range Selectable F C Offset adjustments Programmable decimal point Programmable lock u...

Страница 5: ...to prevent an accident 2 The unit is normally supplied without a power switch or a fuse Use power switch and fuse as required Rating of the fuse 250V 1A Power supply 1 Be sure to use the rated power...

Страница 6: ...nd ammonia gas in particular or combustible gases are emitted the unit is subject to vibration or shock the unit is likely to come in contact with water oil chemicals steam or vapor the unit is expose...

Страница 7: ...uired 1 If you have any questions about the shipment please call the OMEGA Cus tomer Service Department When you receive the shipment inspect the container and equipment for signs of damage Note any e...

Страница 8: ...dels _________________________________________________________________ CN4322 R1 R2 1 32 DIN controller dual relay output CN4322 D1 R2 1 32 DIN controller DC SSR driver and relay output ______________...

Страница 9: ...1472 N 0 1300 32 2372 PL2 0 1300 32 2372 _________________________________________________________ RTD Pt100 150 850 238 1562 Allowable wiring 00385 resistance 10 ohms max per wire ___________________...

Страница 10: ...____________________ Hysteresis width 0 50 FS setting in 1 E U Engineering Unit steps On Off action only _________________________________________________________ Anti reset wind up 0 100 FS setting i...

Страница 11: ...________ OUTPUT _________________________________________________________ Relay contact output 220V AC 30V DC 2A resistive load Mechanical life 107 times under no load Electrical life 105 times under...

Страница 12: ...4 to 122 F _________________________________________________________ Operating humidity Less than 90 RH non condensing _________________________________________________________ Storage temperature 20...

Страница 13: ...___________ STRUCTURE _________________________________________________________ Mounting method Panel mounting _________________________________________________________ Enclosure Plastic housing _____...

Страница 14: ...13 OUTER DIMENSIONS PANEL CUTOUT SIZE Outer Dimensions Panel Cutout Size When installing n number of units 0 5 0 02 0 A 57 2 24 or more B 34 1 34 or more 0 3 0 01 0 D 22 2 0 87...

Страница 15: ...at is provided with the unit according to the installation procedure described below 1 Install the gasket over the enclosure and insert the unit into the panel as shown in Figure 1 2 Slide the mountin...

Страница 16: ...re 2 For terminals 4 to 9 use 14 24 gauge wire Please refer to Page 28 for further instructions on wiring power input and output to the controller Warning Be sure to use the rated power supply voltage...

Страница 17: ...selected 4 UP key Pressing the key once will increase the value by one By pressing and holding it the value is continuously incremented 5 DOWN key Pressing the key once will decrease the value by one...

Страница 18: ...related features are displayed only when the options are provided Viewing and Setting Parameters The data is automatically registered in 3 seconds after the setting It can also be registered by pressi...

Страница 19: ...ce P 6 Press DOWN key to scroll down i d Mod the menu 7 Press SEL key for 3 secs Operational mode FACTORY PRESET MENU Operation Display 1 Operational mode Process value 2 Press and hold SEL key 3 seco...

Страница 20: ...___________________________________________________ Specify TR for Thermocouple RTD input or CV for current voltage input ALARM OPTION _________________________________________________________________...

Страница 21: ...1472 N 0 1300 32 2372 PL2 0 1300 32 2372 _________________________________________________________ RTD Pt100 150 850 238 1562 Allowable wiring 00385 resistance 10 ohms max per wire __________________...

Страница 22: ...act output and DC SSR driver output only _________________________________________________________ Hysteresis width 0 50 FS setting in 1 E U Engineering Unit steps On Off action only _________________...

Страница 23: ...urrent 0 5 FS 1 digit _________________________________________________________ ADDITIONAL FUNCTIONS _________________________________________________________ 8 segment ramp soak 4 ramp 4 soak with 16...

Страница 24: ...______________________________ Reference junction 1 C at 23 C compensation accuracy _______________________________________________________ Process variable offset 10 FS ______________________________...

Страница 25: ...minal 8 pin or 11 pin socket _______________________________________________________ Enclosure Black ABS plastic _______________________________________________________ Dimensions 48 x 48 x 85 7mm 1 1...

Страница 26: ...25 OUTER DIMENSIONS PANEL CUTOUT SIZE CN4431 Panel cutout size when installing n numbers of units 0 5 0 02 0 B 45 1 77 A 63 2 48 or more...

Страница 27: ...to the installation procedure described below How to install the unit Install the unit in the panel as shown below and tighten the screws on the mounting bracket until the unit is secure Make sure th...

Страница 28: ...27 For current input install the 250 precision resistor accessory before using the unit WIRING INSTRUCTIONS Warning Be sure to use the rated power supply voltage and polarity...

Страница 29: ...put categories available Thermocouple RTD or current voltage Make sure you have the right type before wiring the inputs Refer to Table of Input Type Codes and set the parameter P n2 accordingly Note I...

Страница 30: ...d B leads are connected to the right terminals Current Voltage The controller accepts 1 5V 0 5V 4 20mA and 0 20mA DC signals If wiring for a voltage input feed the signal directly to the input termi n...

Страница 31: ...ecommended Connect the load between the normally opened contacts of the relay This way if power to the controller is disrupted the output circuit would open preventing the load from running out of con...

Страница 32: ...he output is a non isolated analog signal used to drive a variety of output devices such as SCRs and valve actuators The load resistance must be less than 600 Make sure the polarity is correct The pro...

Страница 33: ...32 SYSTEM WIRING DIAGRAMS Example 1 Example 2...

Страница 34: ...ing up the menu Numerical value is incremented continuously when held pressed 6 DOWN key For decrementing the numerical value or scrolling down the menu Numerical value is decremented continuously whe...

Страница 35: ...he unit to stabilize in terms of temperature and to achieve the rated accuracy Option related features are displayed only when the options are used Viewing and Setting Parameters The data is automatic...

Страница 36: ...y once P 6 Press DOWN key to scroll down i d Mod the menu 7 Press SEL key for 3 secs Operational mode FACTORY PRESET MENU Operation Display 1 Operational mode PV SV 2 Press and hold SEL key 3 seconds...

Страница 37: ...completed the point indicator stops blinking and the parameter AT will automatically be set to 0 Duration of the autotune process varies with every application The auto tuning process may take betwee...

Страница 38: ...arm type programmed in the setup menu includes an absolute value for the High Alarm Setpoint enter the actual value you want the alarm to be activated at regardless of what the main set point is set f...

Страница 39: ...cale below main setpoint The latter may yield slightly different values not as pre cise but the process overshoot encountered during the autotuning procedure would not be as much Enter the value for t...

Страница 40: ...sables changing the settings of parameters Code 0 All parameter settings are changeable 1 All parameter settings are locked cannot be changed 2 Only the main setpoint can be changed all other paramete...

Страница 41: ...ess oscillations Setting Range 0 to 3200 secs Integral action is turned off when set to 0 d Derivative Time Rate The Derivative Time is that time used in calculating rate of change and thermal lag in...

Страница 42: ...put is time proportional as with the relay or SSR dri ver outputs The shorter the Cycle Time the higher the proportioning resolution is and better is the control but there will be an increased strain...

Страница 43: ...condition The narrower the Hysteresis the less time it takes for the controller to change output condition When the Hysteresis is narrow the On Off control is more accurate but the wear on the output...

Страница 44: ...cated without the control output 2 option Not indicated with current output Cool Proportional Band Coefficient for Cooling The Propor tional Band Coeffi cient for Cooling is a mul tiplier for the pro...

Страница 45: ...44 Deadband Overlap...

Страница 46: ...outputs are separated by a deadband or where they overlap on a heat cool controller A value greater than zero establishes a Deadband area where neither the heating nor cooling outputs are energized fo...

Страница 47: ...ti Reset set to 90 integration will occur at 90 of the band above the setpoint and 90 of the band below the setpoint Auto tuning automatically sets Ar Setting range 0 100 of full scale set in E U P n2...

Страница 48: ...47 Table of Input Type Codes...

Страница 49: ...cess variable display when the process variable goes below the Lower Limit of Input Range setting by 5 of full scale The primary purpose of the Lower Limit of Input Range when used with a thermocouple...

Страница 50: ...49...

Страница 51: ...he range so that 5V DC on a 1 5 0 5VDC signal and 20mA DC on a 4 20 0 20mA DC signal equals the high limit of the engineering unit range used The engi neering unit range could be PSI PH or any range w...

Страница 52: ...elays are energized when the process variable exceeds the alarm setpoint an absolute value The deviation alarm configuration is main setpoint tracking The alarm output relays are energized when the pr...

Страница 53: ...52 Table of Alarm Action Type Codes CN4321...

Страница 54: ...53 Table of Alarm Action Type Codes CN4431...

Страница 55: ...sensor placement and standard ization problems Enter a value which is the difference between the measured process value and the actual process value of the system Setting range 10 10 of full scale SVO...

Страница 56: ...ance with a preset pattern as shown in the figure This device allows a maximum of four ramp and four soak segments Ramp Region in which the setpoint changes toward the target value Soak Region in whic...

Страница 57: ...epeat function 0 No Continue controlling Continue controlling No 1 No Continue controlling Continue controlling Yes 2 No Continue controlling Stand by mode No 3 No Continue controlling Stand by mode Y...

Страница 58: ...f each soak to to segment TM4S Setting range 00 00 to 99hrs 59mins Mod Ramp Soak Mode Up to 16 different modes of ramp soak operations are possible Choose the appropriate code from the Table of Ramp S...

Страница 59: ...58 Table of Output Type Codes...

Страница 60: ...D sensor break or a break in the analog input The con troller can be programmed with either upscale or down scale burn out direction With upscale burnout 100 output will be delivered in the event of s...

Страница 61: ...nges Enter as small a value as possible that pro vides accurate and stable control Setting range 0 0 900 0 secs P An Alarm Hysteresis The Alarm Hysteresis is that area on one side of the alarm setpoin...

Страница 62: ...is function may be enabled even during auto tuning Note that fuzzy control is not effective in units with dual outputs due to the complexity of the process Fuzzy control is also inhibited while the Ra...

Страница 63: ...When RTD between upper limit ON or 20mA A and B or between or less A and C is shorted 3 When PV value is below P SL by 5 FS 4 When analog input wiring is open or short When PV value goes below Control...

Страница 64: ...utotune function should be performed again The autotuned control parameters are not always perfect for every application but almost always give the operator a good starting point from which further re...

Страница 65: ...n in a timely man ner With such heating systems the autotuning function would take a long time to complete with questionable results During autotuning test signals are sent to the process The test sig...

Страница 66: ...sses The amplitude L or lag time which is the overshoot and undershoot of the system when autotuning and the time constant T which is the time the process takes to go through one On Off cycle are meas...

Страница 67: ...ficantly changed Any other condition that will alter the dynamics of the system Proportional Band The proportional band is a band around the setpoint of the CN4431 where the output is between 0 and 10...

Страница 68: ...op sign the speed is reduced accordingly In other words as the error or distance between the car and the stop sign becomes smaller the output or speed of the car is proportionally dimin ished Figuring...

Страница 69: ...em or one where the output would change greatly propor tional to the error If process overshoot cannot be tolerated and the approach to setpoint does not have to be quick a larger or wider pro portion...

Страница 70: ...point the output is around 50 If anything more or less than 50 output is required to maintain setpoint an offset error will occur Integral action eliminates this offset See the diagrams below Integral...

Страница 71: ...ans the control corrects for offset over a long time If the integral time is too long the offset will remain for some time causing a slow responding or sluggish control See the diagram below Derivativ...

Страница 72: ...oint as quickly as possible with minimum overshoot See the diagram below Derivative time is the amount of anticipatory action needed to return a process back to setpoint A short derivative time means...

Страница 73: ...st and verify that the Proportional Band allows maximum rise to setpoint while maintaining minimum overshoot and offset If not com pletely satisfied fine tune the value up or down as needed and test u...

Страница 74: ...is usually some where around 25 of the Integral Time value The derivative Time is now tuned Another tuning method is the closed loop cycling or Zeigler Nichols method According to J G Zeigler and N B...

Страница 75: ...ity The Proportional Band s Ultimate Sensitivity width will be defined as P when calculating the actual Proportional Band 5 Use the following coefficients in determining the correct PID settings for y...

Страница 76: ...enerate their own heat or processes where ambient temperature is not adequate or fast enough in returning a process back to setpoint The two outputs on the CN4321 are independent and sent to two diffe...

Страница 77: ...Rarely does the same amount of cooling output remove the same percentage of process error as the heating output does The Cooling Proportional Band must be manually and separately tuned 4 If the heati...

Страница 78: ...arameters You must manually tune the cooling parameters 6 With the heat side tuned manually set the COOL parameter or Proportional Band Coefficient for Cooling If the cooling output is less powerful t...

Страница 79: ...eating Proportional Band 8 Manually fine tune the parameters CooL and db until just the right amount of cooling is achieved Refer to the programming section for more details on these parameters Heatin...

Страница 80: ...and Overlap 0 0 dSP2 64 bAL 0 100 Balance 0 0 50 0 dSP2 128 Ar 0 100 FS Anti reset wind up 100 FS dSP3 1 P n2 0 16 Input type code dSP3 2 P SL 1999 9999 Lower range of input 0 FS dSP3 4 79 Parameter R...

Страница 81: ...1st setpoint 0 FS dSP4 8 TM1r 0 99hr 59min 1st ramping time 0 00 dSP4 16 TM1S 0 99hr 59min 1st soaking time 0 00 dSP4 32 SV 2 0 100 FS 2nd setpoint 0 FS dSP4 64 TM2r 0 99hr 59min 2nd ramping time 0 0...

Страница 82: ...6 8 rCJ N A ON dSP6 16 PLC1 N A 3 0 dSP6 32 PHC1 N A 103 0 dSP6 64 PLC2 N A 3 0 dSP6 128 PHC2 N A 103 0 dSP7 1 PCUT N A 0 dSP7 2 FUZY OFF ON Fuzzy control OFF dSP7 4 GAIN N A 1 dSP7 8 ADJ0 Zero calibr...

Страница 83: ...uipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentat...

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