Omega CN4420 Series Скачать руководство пользователя страница 49

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Prop. Band for Heating X Input Range

100%

# of units in the
= Proportional Band
for Heating

Prop. Band for Cooling X Input Range

100%

# of units in the
= Proportional Band
for Cooling

Deadband/Overlap X Input Range

100%

# of units in the
= Deadband/Overlap

Input Range= ( minus )

100%

OUTPUT

Heating Side

Coolng Side

100%

OUTPUT

Heating Side

Coolng Side

Setpoint

TEMP

Setpoint

TEMP

100%

OUTPUT

Heating Side

Coolng Side

Setpoint

TEMP

Overlap

Deadband

<1
=1

Prop. Band for Heating X Input Range =

Prop. Band for Cooling X Input Range =

Deadband/Overlap X Input Range =

200%

Proportional Band

Deadband/Overlap

Содержание CN4420 Series

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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 ________________________...

Страница 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...

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

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

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

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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