pressure control for bulk melters series bm 20 / bm...
TRANSCRIPT
Pressure Control for Bulk MeltersSeries BM 20 / BM 200
Manual P/N 458 356 A– English –
NORDSON ENGINEERING GMBH � LÜNEBURG � GERMANY
� 2000 Nordson CorporationAll rights reserved
PRC_BM 20 / BM 200Issued 06/00
COV_EN_458356A
NOTEThis manual is for products with the following P/N:
P/N 785 780
Order numberP/N = Order number for Nordson products
NoticeThis is a Nordson Corporation publication which is protected by copyright. Original copyright date 2000.
No part of this document may be photocopied, reproduced, or translated to another language without the priorwritten consent of Nordson Corporation. The information contained in this publication is subject to change without
notice.
TrademarksAccuJet, AquaGuard, Asymtek, Automove, Autotech, Blue Box, CF, Can Works, Century, Clean Coat, CleanSleeve, CleanSpray, Compumelt, Control Coat,Cross-Cut, Cyclo-Kinetic, Dispensejet, DispenseMate, Durafiber, Durasystem, Easy Coat, Easymove Plus, Econo-Coat, EPREG, ETI, Excel 2000, Flex-O-Coat,Flexi-Spray, Flow Sentry, Fluidmove, Fluidshooter, FoamMelt, FoamMix, Helix, Horizon, Hose Mole, Hot Shot, Hot Stitch, Isocoil, Isocore, Iso-Flo, KB30, Little Squirt,Magnastatic, MEG, Meltex, MicroSet, Millenium, Mini Squirt, Moist-Cure, MultiScan, Nordson, OmniScan, Opticoat, Package of Values, PluraFoam, Porous Coat,PowderGrid, Powderware, Pro-Flo, ProLink, PRX, RBX, Rhino, S. design stylized, SC5, SCF, Select Coat, Select Cure, Slautterback, Smart-Coat, Spray Squirt,Spraymelt, Super Squirt, Sure-Bond, Sure Coat, System Sentry, Tela-Therm, Trends, Tribomatic, UniScan, UpTime, Versa-Coat, Versa-Screen, Versa-Spray,Watermark, When you expect more are registered trademarks – � – of Nordson Corporation.
ATS, Auto-Flo, AutoScan, BetterBook, Chameleon, CanNeck, Check Mate, CPX, Control Weave, Controlled Fiberization, EasyClean, Ebraid, Eclipse, Equi=Bead,Fillmaster, FlexiCoat, Gluie, Ink-Dot, JR, Maxima, MicroFin, Minimeter, Mountaingate, Multifil, OptiMix, Pattern View, PluraMix, Primarc, Prism, Pro-Meter,Pro-Stream, Process Sentry, PurTech, Pulse Spray, Saturn, Seal Sentry, Select Charge, Select Series, Sensomatic, Shaftshield, Spectral, Spectrum, Sure Brand,Sure Coat, Swirl Coat, Vista, Walcom, 2 Rings (Design) are trademarks – � – of Nordson Corporation.
Designations and trademarks stated in this document may be brands that, when used by third parties for their own purposes, could lead to violation of the owners’ rights.
Table of Contents I
� 2000 Nordson CorporationAll rights reserved
PRC_BM 20 / BM 200Issued 06/00
P/N 458356A
Table of Contents
1. Intended Use 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unintended Use – Examples – 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. Residual Risks 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. Components of Pressure Control Feature 2. . . . . . . . . . . . . . . . . . . . . .
4. Description of Functions 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Frequency Converter for Pressure Control 2. . . . . . . . . . . . . . . . . . .
Jumper (factory setting) 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Block Diagram 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5. Terminal Assignment 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. Delivery 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. Repair - Replacing Frequency Converter 5. . . . . . . . . . . . . . . . . . . . . . .
1. Operating Tips 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. Setting Parameters Frequency Converter 6. . . . . . . . . . . . . . . . . . . . . .
PID Controller 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parameters for the PID Controller 6. . . . . . . . . . . . . . . . . . . . . . . . .
Reset time 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. Displays Frequency Converter 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4. Maintenance Pressure Control 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5. Indication Lamps and Indicator Light Control System CS 20 for BM 20 / BM 200 8. . . . . . . . . . . . . . . . . . . . .
6. Pressure Control Control System CS 20 for BM 20 / BM 200 9. . . . . . . . . . . . . . . . . . . . .
7. Displays Control System CS 20 for BM 20 / BM 200 10. . . . . . . . . . . . . . . . . . . .
Display Overview 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8. Settings Overview Control System CS 20 for BM 20 / BM 200 11. . . . . . . . . . . . . . . . . . . .
Motor Part 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description
Installation
Operation
Table of ContentsII
� 2000 Nordson CorporationAll rights reserved
PRC_BM 20 / BM 200Issued 06/00
P/N 458356A
9. Basic Settings Control System CS 20 for BM 20 / BM 200 12. . . . . . . . . . . . . . . . . . . .
Selecting Manual or Automatic Mode 12. . . . . . . . . . . . . . . . . . . . . . .
Selecting Pressure Display bar or psi 12. . . . . . . . . . . . . . . . . . . . . . .
10. Setting Pressure Control Parameters 13. . . . . . . . . . . . . . . . . . . . . . . . .
Parameter Overview Pressure Control 13. . . . . . . . . . . . . . . . . . . . . .
PSP = Pressure setpoint (manual mode) 13. . . . . . . . . . . . . . . . .
PSH = Pressure at pilot voltage Uhi 13. . . . . . . . . . . . . . . . . . . . . .
PSL = Pressure at 0 % pilot voltage 13. . . . . . . . . . . . . . . . . . . . . .
PSL, PSH and Uhi, graphic illustration 13. . . . . . . . . . . . . . . . . . . .
PAH = Pressure monitoring for overpressure with pressure control 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAL = Pressure monitoring for underpressure with pressure control 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PrS = Variable pressure measuring range 15. . . . . . . . . . . . . . . .
1. Introduction 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. Troubleshooting Table 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Display Error on Control System CS 20 for BM 20 / BM 200 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation (contd.)
Troubleshooting
Pressure Control for Bulk Melters Series BM 20 / BM 200 1
� 2000 Nordson CorporationAll rights reserved
PRC_BM 20 / BM 200Issued 06/00
P/N 458356A
Description
The pressure control for bulk melters in the series BM 20 / BM 200 –hereafter also referred to as pressure control – may be used only tocontrol the processing pressure for applications that process hot meltadhesives. The pressure control is based on frequency converters in theseries 8200 vector with function module application I/O and thecorresponding units for controlling drives with three-phase motors forwhich the speed can be varied. The pressure control may be used onlywith components and control systems approved by Nordson.
Any other use is considered to be unintended. Nordson will not be liablefor personal injury or property damage resulting from unintended use.
Intended use also includes the observance of Nordson safetyinstructions.
The pressure control feature may not be used under the followingconditions:
� After manipulation of electrical components
� At extremely high humidity (frequency converter is visibly wet)
� In defective condition.
WARNING: The surfaces of the frequency converter maybecome hot during operation.
1. Intended Use
Unintended Use – Examples –
2. Residual Risks
Pressure Control for Bulk Melters Series BM 20 / BM 2002
� 2000 Nordson CorporationAll rights reserved
PRC_BM 20 / BM 200Issued 06/00
P/N 458356A
The pressure control feature consists of the following components:
Component Type Remark P/NFrequency converter E82EV751 Parameterized for pressure control –
with application I/O and keypad785 780
Motor Asynchronous gear motor WS 370 87 Hz, 230 VControl system CS 20Pressure sensor 0 V � Pmin
10 V � Pmax
linearInterface frequency converter/control system
Pressure setpoint (0 V � Pmin to 10 V � Pmax)
Actual pressure (0 V....10 V � Pcurrent)
Switching Pressure/speed mode
Control release
Motor overtemperature contact
The built-in frequency converter is factory-set (parameterized) so that theNordson A.C. motor with 230 VAC nominal voltage can be operatedwithout any further adjustment.
The frequency converter with the function module application I/O is usedto control pressure. The keypad is used to set parameters for the PIDcontroller. Refer to manual Frequency Converter Series 8200 vector.
3. Components of PressureControl Feature
4. Description of Functions
Frequency Converter forPressure Control
Pressure Control for Bulk Melters Series BM 20 / BM 200 3
� 2000 Nordson CorporationAll rights reserved
PRC_BM 20 / BM 200Issued 06/00
P/N 458356A
002418
1
2
4
3
7
5
6
8
Fig. 1
1. Power supply connection and DC power supply
2. Plug-in socket relay outlet3. Keypad4. Function module application I/O
5. Terminal (digital)6. Terminal (analog)7. Jumper*8. Plug-in socket motor connection
*Jumper (factory setting):
A B C D
7 - 9 8 - 10 1 - 3 2 - 4
Pressure Control for Bulk Melters Series BM 20 / BM 2004
� 2000 Nordson CorporationAll rights reserved
PRC_BM 20 / BM 200Issued 06/00
P/N 458356A
The block diagram shows the principle layout of the pressure controlfeature. The actual pressure measured by the pressure sensor iscompared to the pressure setpoint. The PID controller integrated into thefrequency converter generates a control output signal for the motorspeed according to the deviation.
NOTE: The pressure control feature is active only when the input E2 ison High (Also refer to parameter PSP � OFF). The keypad then displaysPS2.
002419
CAN bus
Pump
CS20 analog module
CS20 motor module
CS20 control panel
Pressure sensor
Actual pressure 0...10VDC
0-100 min-1
Sta
rt/S
top
Pre
ssur
e/sp
eed
mod
e
Pre
ssur
e/sp
eed
setp
oint
Act
ual s
peed
CS20 central module
X4
Pin
3/4
X3
Pin
3/4
0...1
0 V
DC
0...1
00 H
z
Fig. 2
Refer to manual Frequency Converter Series 8200 vector, sectionFrequency Converter for Pressure Control.
Block Diagram
5. Terminal Assignment
Pressure Control for Bulk Melters Series BM 20 / BM 200 5
� 2000 Nordson CorporationAll rights reserved
PRC_BM 20 / BM 200Issued 06/00
P/N 458356A
InstallationWARNING: Allow only qualified personnel to perform thefollowing tasks. Observe and follow the safety instructions inthis document and all other related documentation.
The pressure control feature is parameterized before delivery.
WARNING: Risk of electric shock. Failure to observe can resultin personal injury, death and/or equipment damage.
WARNING: Disconnect unit from line voltage.
WARNING: The frequency converter is still energized afterswitching off. Wait at least 3 minutes before beginning anywork!
NOTE: Use only original Nordson frequency converters. They areparameterized and guarantee the required function. Refer to manualFrequency Converter Series 8200 vector, section Repair - ReplacingFrequency Converter.
When ordering a replacement frequency converter always include thecorresponding Nordson part number (P/N): Refer to Components ofPressure Control Feature.
� Defective fuses may be replaced only when there is no voltagesupplied to the unit. Use only fuses from Nordson original spare partsdeliveries. There are no fuses inside of the frequency converter.
� The plug-in terminals may only be plugged in and unplugged whenthere is no voltage being supplied to the unit.
1. Disconnect all plug connections and cables.
2. Loosen the screws on the mounting device and remove the frequencyconverter from the electrical cabinet.
3. Mount the new frequency converter.
4. Connect all cables and plug connections.
1. Delivery
2. Repair - ReplacingFrequency Converter
Pressure Control for Bulk Melters Series BM 20 / BM 2006
� 2000 Nordson CorporationAll rights reserved
PRC_BM 20 / BM 200Issued 06/00
P/N 458356A
OperationWARNING: Allow only qualified personnel to perform thefollowing tasks. Observe and follow the safety instructions inthis document and all other related documentation.
� Avoid frequent switching of the mains in order to prevent an overloadof the internal switching current limiter. Switching may not occur moreoften than every three minutes.
� When condensation has formed on the frequency converter, it mustfirst evaporate before the unit can be started up.
The pre-adjusted PID parameters for the frequency converter can bemodified via the keypad.
NOTE: The parameters for the frequency converters are factory set.Modifications should be made only in exceptional cases (only to adaptthe PID controller for pressure control) and only by trained personnel.Refer to Frequency Converter Series 8200 vector, section Operation,Parameterization.
The PID control parameters may need to be modified for specialapplications.
Parameters for the PID Controller
Parameter Type Setting range Step Important Factorysetting
Cust.entry
Cust.entry
C0070 Amplification process controller(P)
0.00 to 300.00 0.01 0.00 =P portion inactive
3.64
C0071 Reset time process controller(I)
10 to 9999 1 9999 = I portion inactive
171
C0072 Differential portionprocess controller(D)
0.0 to 5.0 0.1 0.0 = D portion inactive
0.0
1. Operating Tips
2. Setting ParametersFrequency Converter
PID Controller
Pressure Control for Bulk Melters Series BM 20 / BM 200 7
� 2000 Nordson CorporationAll rights reserved
PRC_BM 20 / BM 200Issued 06/00
P/N 458356A
Reset time
Parameter Set value Resulting reset time T N
C0071 10 ... 5000
5000 ... 6000
6000 ... 7000
7000 ... 8000
8000 ... 9998
10 ms ... 5 s
5 s ... 10 s
10 s ... 100 s
100 s ... 1000 s
1000 s ... 9998 s
Set the parameters such that when the setpoint or actual value ischanged, the target size is reached quickly and controlled overswing iskept to a minimum.
Pressure Control for Bulk Melters Series BM 20 / BM 2008
� 2000 Nordson CorporationAll rights reserved
PRC_BM 20 / BM 200Issued 06/00
P/N 458356A
Refer to manual Frequency Converter Series 8200 vector.
The frequency converter is maintenance-free. For information regardingmaintenance of the pressure sensor, refer to the pressure sensormanual.
The indication lamps and the indicator light (if present) show theoperating modes Collective fault, Switched on and Ready.
The pressure control feature generates messages according to thefollowing chart. Refer to manual Control System CS 20 for Bulk MeltersBM 20 / BM 200, section Control Panel, Indication Lamps and IndicatorLight.
Indication lamp Message(s) NotesRed (17) Underpressure alarm Display 30: Plo appears*
Collective fault Overpressure alarm Display 30: Phi appears*
* Refer to manual Control System CS 20 for Bulk Melters BM 20 / BM 200, section Control Panel
3. Displays FrequencyConverter
4. Maintenance PressureControl
5. Indication Lamps andIndicator Light Control System CS 20 forBM 20 / BM 200
Pressure Control for Bulk Melters Series BM 20 / BM 200 9
� 2000 Nordson CorporationAll rights reserved
PRC_BM 20 / BM 200Issued 06/00
P/N 458356A
This section explains operation of the motor part of the control systemCS 20 for bulk melters BM 20 / BM 200 for pressure control.
Refer to Control System CS 20 for Bulk Melters BM 20 / BM 200, sectionOperating the Motor Part for detailed information regarding operation.
The pressure control feature is activated via the parameter PSP � OFF.In place of the speed, Pcr is displayed as an indication for the pressurecontrol. Instead of a speed, a pressure setpoint must be determined. Itcan be entered as a value (manual mode) or set via pilot voltage(automatic mode). The speed required to reach the pressure is calculatedinternally by the control system.
When pressure is controlled, the parameters PSL, PSH, PSP, PAH, PALand the display Pcr are present. For a description of the parameters,refer to Display Overview, Settings Overview Control System CS20 forBM 20 / BM 200.
NOTE: All input is in bar, even when the pressure display is switched topsi.
The measuring range of the pressure sensor can be modified with theparameter PRS or with the selector switch on the analog module. If aftermodification the values are no longer within the permitted (measuring)range, the parameters are returned to the factory settings.
6. Pressure Control Control System CS 20 forBM 20 / BM 200
Pressure Control for Bulk Melters Series BM 20 / BM 20010
� 2000 Nordson CorporationAll rights reserved
PRC_BM 20 / BM 200Issued 06/00
P/N 458356A
This section explains the displays of the control system CS 20 for bulkmelters BM 20 / BM 200 for pressure control. Refer to Control SystemCS 20 for Bulk Melters BM 20 / BM 200 for detailed information regardingoperation.
The following displays appear additionally when the pressure controlfeature is used. Also refer to Control System CS 20 for Bulk MeltersBM 20 / BM 200, section Operating the Motor Part.
Pressure at 0 % pilot voltage(Automatic mode)
Pressure at pilot voltage Uhi(Automatic mode)
Parameters and valueswith pressure control
Pressure setpoint (manual mode)
Overpressure value (correspondsto Phi with speed control)
Underpressure value(corresponds to Plo with speedcontrol)
Pressure control active
(Instead of speed display)
Overpressure alarm (special function)
Underpressure alarm (special function)
002420
Normal display
Speed min-1 (rpm) PressureNOTE: For pressure displays in psi,multiply the value by 10.
Switching pressure display bar / psi
Variable pressure measuring range1 to 680 bar (14.5 to 9860 psi)(special function)
See also Parameter Overview.
See also Parameter Overview.
Automatic fault displays
Service display
Fig. 3
7. Displays Control SystemCS 20 for BM 20 / BM 200
Display Overview
Pressure Control for Bulk Melters Series BM 20 / BM 200 11
� 2000 Nordson CorporationAll rights reserved
PRC_BM 20 / BM 200Issued 06/00
P/N 458356A
This section describes the setting parameters of the control systemCS 20 for bulk melters BM 20 / BM 200 for pressure control. Refer toControl System CS 20 for Bulk Melters BM 20 / BM 200 for basicinformation on operation and other parameters.
NOTE: OFF means that this function is switched off. Do this by setting to0 (zero).
Parameter Function / possible setting Setting range Factory setting Notes
PSL Pressure at 0 % pilot voltage 0.1 bar to 70 % of end valueof pressure measuringrange
1 % of end valueof pressuremeasuring range
PSH Pressure at pilot voltage Uhi 0.1 bar to 70 % of end valueof pressure measuringrange
10 % of end valueof pressuremeasuring range
Refer to manual ControlSystem CS 20 for Bulk MeltersBM 20 / BM 200 for Uhi
PSP Pressure setpoint for manual mode OFF or 0.1 bar to 70 % ofend value of pressuremeasuring range
0.1 bar Also refer to page 14
PAH Pressure monitoring for overpressurewith pressure control
OFF or 2.0 to 30 % of endvalue of pressure measuringrange
OFF
PAL Pressure monitoring for underpressurewith pressure control
OFF or 2.0 to 30 % of endvalue of pressure measuringrange
OFF
PSI Select pressure display in bar or psi no (bar) / yes (psi) (no) bar Option
PrS Variable pressure measuring range 1 to 680 bar 100 bar
8. Settings Overview Control System CS 20 forBM 20 / BM 200
Motor Part
Pressure Control for Bulk Melters Series BM 20 / BM 20012
� 2000 Nordson CorporationAll rights reserved
PRC_BM 20 / BM 200Issued 06/00
P/N 458356A
Refer to Control System CS 20 for Bulk Melters BM 20 / BM 200, sectionOperating the Motor Part.
Manual mode: The pressure setpoint is equal to the value entered viaparameter PSP and remains constant.
Automatic mode: The pressure setpoint is changed via pilot voltage.The parameters PSL, PSH and Uhi can be adjusted. PSP must be set� OFF!
NOTE: Automatic mode is only possible if pilot voltage is available.
1. Press key 27 for approx. 2 seconds (until –P– blinks in display 30).
2. Press key 21 until the desired operating mode appears. In manualmode, symbol 26 lights.
Pressure can be displayed in bar or psi. For display in psi, the rightdecimal point in display 31 lights.
NOTE: For display in psi, multiply the value by 10.
1. Press and hold keys 22 and 23 and press key 27 for approx. 2 seconds. Displays 30 and 31 blink.
2. Press key 22 or 23 until display 31 shows PSi.
3. Press and hold key 27 for approx. 2 seconds, then use key 22 or 23to set YES (psi) or no (bar).
4. End Selecting bar or psi: Press and hold keys 22 and 23 and presskey 27 for approx. 2 seconds.
bar Factory setting: ���
PSI Setting range: ��� � � � � � ���
9. Basic Settings Control System CS 20 forBM 20 / BM 200
Selecting Manual or AutomaticMode
Selecting Pressure Display baror psi
Pressure Control for Bulk Melters Series BM 20 / BM 200 13
� 2000 Nordson CorporationAll rights reserved
PRC_BM 20 / BM 200Issued 06/00
P/N 458356A
Refer to Control System CS 20 for BM 20 / BM 200, section SettingParameters, Operating the Motor Part.
PSP = Pressure setpoint (manual mode)
The function pressure control can be deactivated with this parameter (OFF). Then all other pressure parameters are no longer displayed. WhenPSP = OFF, speed control is active.
PSP Factory setting: 0.1 bar Note: Corresponds to the speed setpoint in manual mode with speedcontrolSetting range: OFF or 0.1 bar to 70 % of end value of
pressure measuring range
control.
Setting increments: Up to 100 bar: 0.1
Over 100 bar: 1.0
PSH = Pressure at pilot voltage Uhi
Refer to PSL, PSH and Uhi, graphic illustration
PSH Factory setting: 10 % of end value of pressuremeasuring range
Note: Corresponds to rhi with speed control.
If the operator attempts to set the value PSH lower than PSL, theSetting range: 0.1 bar to 70 % of end value of
pressure measuring range
If the o erator attem ts to set the value PSH lower than PSL, thevalue PSL is automatically reduced.
Setting increments: Up to 100 bar: 0.1
Over 100 bar: 1.0
PSL = Pressure at 0 % pilot voltage
Refer to PSL, PSH and Uhi, graphic illustration
PSL Factory setting: 1 % of end value of pressuremeasuring range
Note: Corresponds to rLo with speed control.
If the operator attempts to set the value PSL higher than PSH, theSetting range: 0.1 bar to 70 % of end value of
pressure measuring range
If the o erator attem ts to set the value PSL higher than PSH, thevalue PSH is automatically increased.
Setting increments: Up to 100 bar: 0.1
Over 100 bar: 1.0
PSL, PSH and Uhi, graphic illustration
20 40 60 80 1000
20
40
60
80
100
0
PSL = 1 bar / PSH = 70 bar / Uhi = 100 %
20 40 60 80 1000
20
40
60
80
100
0
Pre
ssur
e in
bar
PSL = 25 bar / PSH = 70 bar / Uhi = 100 %
20 40 60 80 1000
20
40
60
80
100
0
PSL = 20 bar / PSH = 30 bar / Uhi = 100 %
20 40 60 80 1000
20
40
60
80
100
0
PSL = 1 bar / PSH = 70 bar / Uhi = 60 %
Pre
ssur
e in
bar
Pre
ssur
e in
bar
Pre
ssur
e in
bar
002421Pilot voltage in % Pilot voltage in % Pilot voltage in % Pilot voltage in %
Fig. 4 Pressure to pilot voltage – Examples for 100 bar pressure sensor –
10. Setting Pressure ControlParameters
Parameter Overview PressureControl
Pressure Control for Bulk Melters Series BM 20 / BM 20014
� 2000 Nordson CorporationAll rights reserved
PRC_BM 20 / BM 200Issued 06/00
P/N 458356A
PAH = Pressure monitoring for overpressure with pressurecontrol
PAL = Pressure monitoring for underpressure with pressurecontrol
Overpressure and underpressure values are differential values.
The purpose of pressure monitoring is to indicate underpressure or overpressure and to stop the motor if appropriate when overpressure occurs.
PAL = Underpressure: When the pressure falls below the alarm limit (setpoint minus underpressure value) for longer than 10 seconds, PALappears in display 30 (Fig. 1) and the red indication lamp collective fault lights up (error number 242). If the alarm limit is below 0 bar (e.g..setpoint = 2 bar, PAL = 3 bar), no underpressure alarm can be triggered (Refer to example).
PAH = Overpressure: When the pressure exceeds the alarm limit (setpoint plus overpressure value) for longer than 20 seconds, PAH appears indisplay 30 (Fig. 1) and the red indication lamp collective fault lights up (error number 241). If the alarm limit is exceeded for longer than 60seconds, the motor is stopped and the the green indication lamp ready goes off (error number 240).
Underpressure and overpressure monitoring can be deactivated by setting the parameter to less than 2 % (display OFF).
The error indications PAL and PAH are reset by switching the motor off and on.
PAL
PAH
Factory setting: OFF Note: Special function
Note: PAH corresponds to Phi and PAL corresponds to Plo with speedcontrol.
Example: p [bar]Setting range: OFF or 2.0 % to 30 % of end
value of pressure measuringrange
p
100 %
[ ]
PAH
PAL 3 bar
Setting increments: Up to 100 bar: 0.1
Over 100 bar: 1.0100 System pressure [%]0
2
Note: The parameters indicate the maximum permitted deviation from the setpoint.
Pressure Control for Bulk Melters Series BM 20 / BM 200 15
� 2000 Nordson CorporationAll rights reserved
PRC_BM 20 / BM 200Issued 06/00
P/N 458356A
Refer also to Setting Parameters.
PrS = Variable pressure measuring range
The variable pressure measuring range serves to adjust special pressure sensors to the control system.
PrS Factory setting: 100 bar (1450 psi) Note: Special function; the parameter is only available if the selectorswitch S 1 of the analog module is in position 5 (see Analog Module)Setting range: 1 to 680 bar (14 to 9860 psi) switch S 1 of the analog module is in position 5 (see Analog Module)
Setting increments: Up to 100 bar: 0.1
Over 100 bar: 1.0
Parameter Overview (contd.)
Pressure Control for Bulk Melters Series BM 20 / BM 20016
� 2000 Nordson CorporationAll rights reserved
PRC_BM 20 / BM 200Issued 06/00
P/N 458356A
TroubleshootingWARNING: Allow only qualified personnel to perform thefollowing tasks. Observe and follow the safety instructions inthis document and all other related documentation.
Refer to Frequency Converter Series 8200 vector, sectionTroubleshooting and Control System CS 20 for Bulk Melters BM 20 / BM 200. The troubleshooting tables do not include all possible faults,only those which may typically occur.
The following faults are not covered by the troubleshooting tables:
� Installation errors
� Operation errors
� Loose plug and screw connections (defective contacts).
NOTE: If the fault can not be remedied by switching the frequencyconverter off and on, the unit must be repaired or replaced by customerservice.
Problem Possible cause
Fault or defect frequency converter Refer to Frequency Converter Series 8200 vector, sectionTroubleshooting and the section Service Display Error on ControlSystem CS 20 for BM 20 / BM 200 following this table.
Fault or defect Control System CS 20 forBulk Melters BM 20 / BM 200
Refer to Control System CS 20 for Bulk Melters BM 20 / BM 200
Defect pressure sensor Refer to manual Pressure Sensor, replace if necessary
1. Introduction
2. Troubleshooting Table
min–1 barpsiM1
30 31
Pressure Control for Bulk Melters Series BM 20 / BM 200 17
� 2000 Nordson CorporationAll rights reserved
PRC_BM 20 / BM 200Issued 06/00
P/N 458356A
The error displays can be shown in the service display of the motor part.Errors which do not appear in display 30 (e.g. r_d) are displayed as errornumbers in display 31 of motor panel 1. Refer to manual CS 20 forBM 20 / BM 200 section Service Display Error.
NOTE: When errors are caused by situations not described here,Nordson’s customer service can help.
Error Cause / Troubleshooting
Err
or n
umbe
r
240 Overpressure alarm from pressure monitoring.
Value of parameter PAH was exceeded forlonger than 60 seconds (Refer to Operating theMotor Part, Parameter Overview).
The error indication Phi appears in display 30.
Motor is stopped.
Reset overpressure alarm (switch motor on/off), then check the following:
- Is the safety valve polluted and thus blocked?
- Is the safety valve set incorrectly?
- Is the safety valve defective?
- Is the filter polluted?
- Is the adhesive temperature too low?
- Is the value of parameter Phi below or too close to the safety valve setting?
- With pressure control via pilot voltage: Was pilot voltage changed too quickly(EMERGENCY OFF parent machine)?
241 Overpressure alarm from pressure monitoring.
Value of parameter PAH was exceeded forlonger than 20 seconds (Refer to Operating theMotor Part, Parameter Overview).
The error indication Phi appears in display 30.
Reset overpressure alarm (switch motor on/off), then check the following:
- Is the safety valve polluted and thus blocked?
- Is the safety valve set incorrectly?
- Is the safety valve defective?
- Is the filter polluted?
- Is the adhesive temperature too low?
- Is the value of parameter Phi below or too close to the safety valve setting?
- With pressure control via pilot voltage: Was pilot voltage changed too quickly(EMERGENCY OFF parent machine)?
242 Underpressure alarm from pressure monitoring.
Value of parameter PAL was exceeded forlonger than 20 seconds (Refer to Operating theMotor Part, Parameter Overview).
The error indication Plo appears in display 30.
Reset underpressure alarm (switch motor on/off), then check the following:
- Is the safety valve polluted and thus blocked?
- Is the safety valve set incorrectly?
- Is the safety valve defective?
- Is the drum empty?
- Is the pump block of the gear pump or gerotor pump worn?
- Is the pump defective?
Service Display Error onControl System CS 20 forBM 20 / BM 200
Pressure Control for Bulk Melters Series BM 20 / BM 20018
� 2000 Nordson CorporationAll rights reserved
PRC_BM 20 / BM 200Issued 06/00
P/N 458356A