Omega CN4420 Series User Manual Download

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TABLE OF CONTENTS

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Model Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Outer Dimensions and Panel Cutout Size . . . . . . . . . . . . . . . . . . . . . . . 15

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Wiring Instructions: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Front Panel Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Front Panel Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Autotuning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Programming

1. Set Up Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
2. System Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Appendix A: Autotuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Appendix B: Manual Tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Appendix C: Heater Burnout Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Appendix D: Heat/Cool Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Quick Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Summary of Contents for CN4420 Series

Page 1: ...and Panel Cutout Size 15 Installation 17 Wiring Instructions 18 Front Panel Description 24 Front Panel Operation 26 Autotuning 28 Programming 1 Set Up Menu 29 2 System Menu 41 Error Messages 54 Append...

Page 2: ...l display for indication of process setpoint values These are available with a single control output and optional process alarm They are used in conjunction with a socket The CN4520 CN4620 and CN4720...

Page 3: ...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 f...

Page 4: ...switch and fuse as required Rating of the fuse 250V 1A Power supply 1 Be sure to use the rated power supply voltage to protect the unit against damage and to prevent failure 2 Keep the power off until...

Page 5: ...and 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 expo...

Page 6: ...required 1 If you have any questions about the shipment please call the OMEGA Customer Service Department When you receive the shipment inspect the container and equipment for signs of damage Note any...

Page 7: ...Option Type First Output Second Output _________________________________________________________________ Relay R1 R2 DC SSR driver D1 D2 4 20 mA F1 F2 ________________________________________________...

Page 8: ...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 ________________________...

Page 9: ...______ Hysteresis width 0 50 FS setting in 1 E U Engineering Units steps On Off action only _________________________________________________________ Anti reset wind up 0 100 FS setting in 1 E U steps...

Page 10: ...o setting with auto tuning _________________________________________________________ Overlap dead band 50 of heating proportional band _________________________________________________________ Input s...

Page 11: ...______________________ ALARM _______________________________________________________ Alarm output Relay contact SPST 220V AC 30V DC 1A resistive load CN4420 1 point Other types 2 points ______________...

Page 12: ...______________________________________________ Insulation resistance 50M or more 500V DC _______________________________________________________ Withstand voltage Power source Earth 1500V AC 1 min Pow...

Page 13: ...iated _______________________________________________________ OPERATING AND STORAGE CONDITIONS _______________________________________________________ Operating temperature 10 to 50 C 14 to 122 F ____...

Page 14: ...N4620 100 5 x 100 5 x 95 8mm 1 4 DIN 3 96 x 3 96 x 3 77 in W x H x D CN4720 76 5 x 76 5 x 95 8mm 72 mm 3 01 x 3 01 x 3 77 in W x H x D _______________________________________________________ Weight CN...

Page 15: ...TA ENT PV SV SV 48 1 89 85 7 3 37 57 2 24 44 8 1 76 71 5 2 81 Panel Gasket 7 9 5 0 37 0 28 48 1 89 57 2 24 Mounting bracket Panel cutout size when installing n numbers of units A A B B Unit mm in Pane...

Page 16: ...6 0 0 7 0 0 8 0 F 92 68 92 0 8 0 0 7 0 0 8 0 G 120Min 96Min 120Min H 92Min 116 Min 140 Min 2 07 3 96 3 56 4 51 1 77 0 02 0 3 620 03 0 4 72Min 3 62Min 3 01 3 01 2 64 3 58 2 68 0 03 0 2 68 0 03 0 3 78M...

Page 17: ...n the bottom and tighten the screws to a torque of about 14 7N cm 1 5kg cm For CN4420 install the unit in the panel as shown below and tighten the screws on the mounting bracket until the unit is secu...

Page 18: ...k of instrument B B A 2 CN4421 A with alarm 1 2 3 4 5 6 7 8 9 10 11 B B A Current output DC SSR driver output Contact output Voltage current Alarm output Thermocouple input Power supply viewing from t...

Page 19: ...alarm output Common CT input Control output 2 on the cooling side Current output DC SSR driver output 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 3 2 1 2 1 7 5 12 10 A B B CN4520 CN4620 Series 2 1 RTD Vo...

Page 20: ...the controller and the heater Wiring Inputs There are two input categories available Thermocouple RTD or current voltage Make sure you have the right type before wiring the inputs Refer to Table of In...

Page 21: ...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...

Page 22: ...rom running out of control Set the proportional time cycle parameter TC to 15 secs or more 30 secs typical Use of MOV circuit is recommended to protect the relay against switching surges and to ensure...

Page 23: ...Make sure the polarity is correct The proportional time cycle parameter TC is set to 0 and is not dis played on the programming menu Wiring Alarms Make sure the load does not exceed the rated capacit...

Page 24: ...ery time this key is pressed The sequence of displays however is opposite to the sequence of displays with the SEL key 5 Direct SV key By pressing this key the set value SV is dis played 6 SELECT key...

Page 25: ...place is incremented by 1 12 Control output indication lamp C for CN4420 only Comes on when the control output is ON C1 Comes on when the control output 1 is ON C2 Comes on when the control output 2 i...

Page 26: ...stabilize in terms of temperature and to achieve the rated accuracy Option related features are displayed only when the options are provided Viewing and Setting Parameters After setting the data pres...

Page 27: ...P n2 dSP7 the next parameter or press and hold UP hundreds key or DOWN key to scroll down or up the menu at a faster rate 8 Press SV SV PV for CN4420 key Operational mode SYSTEM MENU Operation Displa...

Page 28: ...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 between 1 and 30 min...

Page 29: ...iable increases A cooling application would require direct acting control Enter the code from the Table of Output Type Codes which establishes the controller as either a reverse or direct acting contr...

Page 30: ...Direct action Output 2 Direct action Reverse action Output 1 Downscale Upscale Downscale Upscale Downscale Upscale Downscale Upscale Downscale Upscale Downscale Upscale Downscale Upscale Downscale Up...

Page 31: ...ontroller still needs the correct code for the input type to be used See page 32 P dF Input Filter Constant The Input Filter is used to filter out the quick changes that occur to the process variable...

Page 32: ...o 800 0 to 1200 0 to 1600 0 to 1800 0 to 1600 199 to 400 199 to 800 0 to 1300 0 to 1300 Range of measurement C 238 to 1562 32 to 1472 32 to 2192 32 to 2912 32 to 3272 32 to 2912 328 to 752 328 to 1472...

Page 33: ...fected by these settings An underscale or an overscale error is indicated if the process value goes below or above the range by 5 of full scale The pri mary purpose of these parameters when used with...

Page 34: ...am to 50 to 500 Full Range 500 50 450 F 27 5 50 500 522 5 Setpoint Range 5 5 Indicating Range SCALING DC CURRENT VOLTAGE INPUT RANGES Example Program a 4 20mA DC signal for 0 to 100 E U Input Type Min...

Page 35: ...exceeds the main setpoint by a deviation value set by AL or AH The combination alarm configurations are a mixture of both the deviation and absolute value settings for the high and low alarms With zo...

Page 36: ...igh alarm with hold Low alarm with hold High Low alarm with hold High Low deviation alarm ALM 1 2 independent action High Low absolute alarm High Low deviation alarm High absolute Low deviation alarm...

Page 37: ...tion at which the controller displays the process variable and other parameter values The controller can indicate one one tenths or one hundredth of a unit The Decimal Point Position does not increase...

Page 38: ...changed This parameter can be used to correct for differences in sensors sensor placement and standard ization problems Enter a value which is the difference between the measured process value and the...

Page 39: ...input range parame ters and the indication is in engineering units Setting C or F FUZY Fuzzy Logic Control Employing Fuzzy Logic Control in addition to PID control eliminates system overshoot and effe...

Page 40: ...ack to factory values by set ting ADJ0 and ADJS to 0 dSP1 Parameter Mask function This function is used to indi to to vidually mask the display of parameters that are not dSP7 used for your applicatio...

Page 41: ...uspended P Proportional Band The proportional band is that area around main setpoint where the control output is neither fully on nor fully off Setting range 0 0 to 999 9 of full scale For On Off cont...

Page 42: ...dampens proportional and integral action as it anticipates where the process should be The more Derivative Time entered the more the damping action The less Derivative Time entered the less the dampi...

Page 43: ...ation alarm tracks main setpoint Set within the input range Not indicated without the alarm option AH High Alarm Setpoint The High Alarm Setpoint is that point of the process above which the high alar...

Page 44: ...e time the higher the proportioning resolution is and better is the control but there will be an increased strain on the output device Enter a value that is based on the limitations of your con trolle...

Page 45: ...sis the less time the controller takes to change output con dition When the Hysteresis is narrow the On Off control is more accurate but the wear on the output relay is increased Enter a value which i...

Page 46: ...efective heater bank is reduced By determining what the optimal current and the optimal current minus one zone for the heater bank is the Heater Break Alarm setpoint can be calculated and entered Sett...

Page 47: ...uch Enter the value for the type of autotuning you would like to run on your particular application based on overshoot toler ances and the precision of the PID parameters needed For more information o...

Page 48: ...ec or more For current output Set to 0 normally not indicated Not indicated without the control output 2 option CooL Proportional Band Coefficient for Cooling The Propor tional Band Coefficient for Co...

Page 49: ...put Range 100 of units in the Deadband Overlap Input Range minus 100 0 OUTPUT Heating Side Coolng Side 100 0 OUTPUT Heating Side Coolng Side Setpoint TEMP Setpoint TEMP 100 0 OUTPUT Heating Side Cooln...

Page 50: ...he application s efficiency in maintaining tight heat cool control Setting range 50 0 to 50 0 of the heating proportional band Not indicated without control output 2 option bAL Balance Balance is used...

Page 51: ...ows a maximum of four ramp and four soak segments Ramp is the region in which SV changes toward the target value Soak is the region in which the target value is maintained STAT displays the current ra...

Page 52: ...st soak First ramp Second ramp Third ramp TM1R TM1S TM2R TM2S TM3R TM3S TM4R TM4S Set Value SV3 SV2 SV1 SV4 PV Ramp Region in which the setpoint changes toward the target value Soak Region in which th...

Page 53: ...mode No 11 Yes Continue controlling Stand by mode Yes 12 Yes Stand by mode Continue controlling No 13 Yes Stand by mode Continue controlling Yes 14 Yes Stand by mode Stand by mode No 15 Yes Stand by m...

Page 54: ...When RTD between upscale 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 is...

Page 55: ...ne 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 fur ther refine...

Page 56: ...systems the autotuning function would take a very long time to complete with questionable results During autotuning test signals are sent to the process The test signals are 100 output and 0 output at...

Page 57: ...ich is the overshoot and undershoot of the system when auto tuning and the time constant T which is the time the process takes to go through one On Off cycle is measured See diagram below The measurem...

Page 58: ...roportional Band The proportional band is a band around the setpoint of the controller where the output is between 0 and 100 The percentage of output is proportional to the amount of error between the...

Page 59: ...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 out when the vehicle should start slowing down depends on...

Page 60: ...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...

Page 61: ...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...

Page 62: ...g time If the integral time is too long the offset will remain for some time causing slow responding or sluggish control See the diagram below Derivative Time In the case of a process upset proportion...

Page 63: ...th 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 little derivative action If th...

Page 64: ...ify 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 until corre...

Page 65: ...tive Time value is usually some where around 25 of the Integral Time value Another tuning method is the closed loop cycling or Zeigler Nichols method According to J G Zeigler and N B Nichols optimal t...

Page 66: ...portional 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 your particu...

Page 67: ...er is able to detect a heater problem by analyzing the cur rent used by the heater The actual sensing is done by a current sens ing transformer sold separately which is placed around the hot lead goin...

Page 68: ...yze the signal sent by the current sensing transformer 4 The power supply used should be the same for the controller and heater to eliminate current fluctuations due to power differences between diffe...

Page 69: ...lowering the setting until the relay is energized and the HB status indicator is lit This is the maximum current usage of the heater Using the same procedure find the maximum current usage of the hea...

Page 70: ...ot adequate or fast enough in returning a process back to setpoint The two outputs on the controller are independent and sent to two dif ferent output devices The controller can be equipped with two o...

Page 71: ...ge at main setpoint when cooling is added 3 The Proportional Band for heating and cooling are almost always different Rarely does the same amount of cooling output remove the same percentage of proces...

Page 72: ...t 2 terminals located on the back of your controller 3 In the Setup menu program the correct code for Heat Cool action See Table of Output Type Codes 4 In the System menu program TC2 the cycle time fo...

Page 73: ...programming section for more details 7 Finally you can add a Deadband Overlap The programmed Deadband Overlap parameter can be within 50 to 50 of the Heating Proportional band To establish a Deadband...

Page 74: ...dSP6 1 P An 0 50 FS Alarm Hysteresis 1 dSP6 2 P dP 0 2 Decimal point position 0 dSP6 4 rCJ ON dSP6 8 PVOF 10 10 FS PV offset 0 dSP6 16 SVOF 50 50 FS SV offset 0 dSP6 32 P F C F C F selection dSP6 64 P...

Page 75: ...2 I 0 3200sec Integral time 240 dSP1 4 D 0 0 999 9sec Derivative time 60 dSP1 8 AL 0 100 FS Low Alarm setpoint 10 dSP1 16 AH 0 100 FS High Alarm setpoint 10 dSP1 32 TC 1 150sec Cycle Time output 1 dSP...

Page 76: ...00 dSP3 32 TM1S 0 99hr 59min 1st soaking time 0 00 dSP3 64 SV 2 0 100 FS 2nd setpoint 0 FS dSP3 128 TM2r 0 99hr 59min 2nd ramping time 0 00 dSP4 1 TM2S 0 99hr 59min 2nd soaking time 0 00 dSP4 2 SV 3...

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