W.E.S.T. Elektronik PAM-195-P-S3 Technical Documentation Manual Download Page 1 | Manualshive

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Technical Documentation

PAM-195-P-S3

Power amplifier for directional valves with integrated power limitation function

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Summary of Contents for PAM-195-P-S3

Page 1: ...Technical Documentation PAM 195 P S3 Power amplifier for directional valves with integrated power limitation function ...

Page 2: ... 21 5 2 1 LG Changing the language for the help texts 21 5 2 2 MODE Switching between parameter groups 21 5 2 3 AINMODE Mode of input scaling 21 5 2 4 SENS Failure monitoring 22 5 2 5 CCMODE Activation of the characteristic linearization 22 5 2 6 SOLENOIDS One or two solenoids 22 5 2 7 POL Output polarity 23 5 3 Input signal adaption 23 5 3 1 SIGNAL Switching the type of input signal 23 5 3 2 AIN ...

Page 3: ...op current controller 30 5 6 6 PPWM Solenoid current controller P gain 31 5 6 7 IPWM Solenoid current controller I gain 31 5 7 Process data Monitoring 31 6 Appendix 32 6 1 Failure monitoring 32 6 2 Troubleshooting 32 6 3 Differences to former product generations 33 6 3 1 Baudrate of the serial Interface 33 6 3 2 Output current adjustment MIN_MAX RCURR 33 6 4 Description of the command structure 34...

Page 4: ...es the module plus the terminal blocks which are a part of the housing The Profibus plug interface cables and further parts which may be required should be ordered separately This documentation can be downloaded as a PDF file from www w e st de 1 3 Accessories WPC 300 Start Up Tool downloadable from our homepage products software Any standard cable with USB A and USB B connector can be used as the...

Page 5: ... The data and characteristics described herein serve only to describe the product The user is required to evaluate this data and to check suitability for the particular application General suitability cannot be inferred from this document We reserve the right to make technical modifications due to further development of the product described in this manual The technical information and dimensions ...

Page 6: ...n by trained specialist staff The in struction manual must be read with care The installation instructions and the commissioning instructions must be followed Guarantee and liability claims are invalid if the instructions are not complied with and or in case of incorrect installation or inappropriate use CAUTION All electronic modules are manufactured to a high quality Malfunctions due to the fail...

Page 7: ...kdown is short circuit proof and disables the power stage in case of an error RAMP MIN and MAX the DITHER frequency and amplitude and the PWM frequency are programmable In addition the valve characteristics can be linearized via 10 XY points For example using pressure valves a linear behavior between input signal and pressure can be reached Typical applications Control of directional throttle and ...

Page 8: ...y 1 2 3 4 5 6 7 8 9 10 11 12 14 15 16 13 D 41372 Niederkrüchten Homepage http www w e st de W E ST Elektronik 13 14 15 9 10 11 12 16 A B Klemmblöcke steckbar Terminals removable LEDs USB interface Typenschild und Anschlussbelegung Type plate and terminal pin assignment 23 0000 mm 99 0000 mm 114 0000 mm ...

Page 9: ... interference sources frequency converters power contactors and cable lengths 3m Inexpensive SMD ferrites can be used with high frequency radiation The screening should be connected to PE PE terminal as close to the module as possi ble The local requirements for screening must be taken into account in all cases The screening should be connected to at both ends Equipotential bonding must be provide...

Page 10: ...d and properly configured See WPC 300 short guideline Further commissioning and diagnosis are supported by the operating software ATTENTION The COMPORT in WPC 300 has to be closed before the USB plug is to be disconnected Otherwise the WPC 300 is going to be instable Pre parameterization Now set up the following parameters with reference to the system design and circuit diagrams The nominal output...

Page 11: ... application the volumetric flow will be reduced above a pro grammed threshold This is a typical application which is the reason for displaying the feedback value also in bar 3 3 2 Limitation of the input common power In this kind of use several devices get a signal for the power consumption of the whole system as feedback So single valves can open without limitation Even if the system reaches its...

Page 12: ...wledge the error the data have to be saved with the SAVE command or the corresponding button in the WPC If the function of the module has changed via the FUNCTION parameter all parameters are deleted purposely and set to default values In this case the LEDs indicate no error but a desired state To acknowledge please save GREEN Identical to the READY output OFF No power supply or ENABLE is not acti...

Page 13: ...lashing READY LED The output current is closed loop controlled whereby a high accuracy and a good dynamic will be obtained All custom proportional valves up to 2 6A may be controlled with this power amplifier This modified module is basically controlled by an unipolar command signal in the range of 0 10V or 4 20mA A switching input is used for changing direction By this way directional valves can ...

Page 14: ...lenoid B Connection Analogue input signals PIN 9 10 Command input signal W range 100 100 or 0 100 corresponds with 0 10 V or 4 20 mA Other signal ranges can be scaled PIN 14 13 Feedback input actual pressure range 0 10 V or 4 20 mA corresponds with 0 100 PIN 11 0 V reference for the signal inputs Connection Digital inputs and outputs PIN 15 Enable Input This digital input signal initializes the ap...

Page 15: ...gital output USB type B PAM 195 P S3 6 9 14 10 13 Feedback Valve adaption digital input x u Power supply 8 GND Control program Ramp function Demand Power limitation DC DC C Direction Activation Power stage ia ib 2 to solenoid A to solenoid B Differential input w 12 Reference voltage 11 scaling digital input Input 7 Input ...

Page 16: ...e 8 7 6 5 16 15 14 13 12 11 10 9 Analoger Sollwert Analogue command signal Magnet A Solenoid A 4 3 2 1 0V Schirm Screen PE Spannungsversorgung Power Supply 0V 12 V 24 V Magnet B Solenoid B V ref PE Direction Ready Analoges Sensorsignal Analogue feedback signal 0V ...

Page 17: ... PIN 12 GND PIN 11 In PIN 9 In PIN 10 Potentiometer Joystick In PIN 9 In PIN 10 4 20 mA input AIN W 1250 1000 2000 C 0 100 AIN W 2500 1000 6000 C 100 AIN W 1000 800 0 V 0 100 AIN W 2000 800 4000 V 100 0 10 V to 100 with polarity switch In PIN 9 In PIN 10 GND PIN 11 AIN W 1000 1000 0 V 0 100 PIN 6 24 V input 0 100 In PIN 9 PIN 6 24 V input 0 100 4 20 mA input with polarity switch AIN W 1250 1000 20...

Page 18: ...n 90 4 20 390 0 03 PWM power outputs Maximum output current Frequency A Hz broken wire and short circuit monitored 2 6 61 2604 selectable in steps Sample times Current controller Analog inputs µs ms 125 1 Serial interface Transmission rate kBaud USB virtual COM Port 9 6 115 2 Housing Material Flammability class Snap on module to EN 50022 PA 6 6 polyamide V0 UL94 Weight kg 0 190 Connections Communi...

Page 19: ...000 B 1000 C 0 X V Free scaling of the analogue command signal input Gets acti vated when AINMODE is switched over to MATH SYS_RANGE 100 bar System pressure Sensor signal scaling SIGNAL X U0 10 Type of input AIN X A 1000 B 1000 C 0 X V Free scaling of the analogue feedback input Gets activated when AINMODE is switched over to MATH N_RANGE X 100 bar Sensor nominal pressure OFFSET X 0 mbar Sensor of...

Page 20: ...dband compensation MAX A MAX B 10000 10000 0 01 0 01 Output scaling TRIGGER 200 0 01 Deadband compensation trigger point Parameters of the power stage CURRENT 1000 mA Rated solenoid current DAMPL 500 0 01 Dither amplitude DFREQ 121 Hz Dither frequency PWM 2604 Hz PWM frequency ACC ON Current loop auto adjustment PPWM IPWM 7 40 P Gain of the current loop I Gain of the current loop ...

Page 21: ...nges the parameter mode Various commands defined via STD EXP are blanked out in standard mode The several commands in expert mode have more significant influence on the system perfor mance Therefore they should be changed with care 5 2 3 AINMODE Mode of input scaling Command Parameters Unit Group AINMODE X x EASY MATH EXP This command allows switching the input scaling between a selection out of s...

Page 22: ...is possible especially for troubleshooting AUTO MODE The module checks each second the actual failure status which will in case of a per sistent error trigger the LED and the READY output for a short time 5 2 5 CCMODE Activation of the characteristic linearization Command Parameters Unit Group CCMODE X x ON OFF EXP This command will be used for activation or deactivation of the characteristics lin...

Page 23: ...current 100 0 Directional valves This command allows a switch over of the output polarity 5 3 Input signal adaption 5 3 1 SIGNAL Switching the type of input signal Command Parameters Unit Group SIGNAL W X SIGNAL X X X U 10 U 10 I4 12 20 I20 12 4 AINMODE EASY By the use of this command some standard type of signals can be selected easily Available are the voltage signals from 0 10 V or 10 0 V just ...

Page 24: ...IN command would look like this AIN I 20 16 2000 C or AIN I 1250 1000 2000 C Typical settings examples AIN settings Input signal Description AIN I 10 5 0 V OR AIN I 2000 1000 0 V 0 5 V Voltages input Usable 0 10V for a working range of 0 100 one solenoid Really used are 0 5V for 0 100 AIN I 10 8 1000 V OR AIN I 1250 1000 1000 V 1 9 V Voltages input Usable 0 10V for a working range of 0 100 one sol...

Page 25: ...essure of the sensor Command Parameters Unit Group N_RANGE X X x 1 600 bar AINMODE EASY This parameter defines the working range of the pressure sensor By inputting this value the controller is able to adapt the input scaling to the range of the rated pressure 5 3 5 OFFSET X Zero point setting of the sensor Command Parameters Unit Group OFFSET X X x 60000 60000 mbar AINMODE EASY Via this parameter...

Page 26: ...L V Power limitation factor 5 4 2 PL T1 Dynamic of the power limitation function Command Parameters Unit Group PLV I X PLT1 I X I A B x 2000 10000 x 10 1000 0 01 0 1 ms STD The power limitation function is parameterized by these parameters PL V defines the power factor according to the possible maximum power for each direction The possible maximum is calculated by the maximum pressure and the disp...

Page 27: ...hed to ON The positive indexes stand for the solenoid A the negative ones represent the solenoid B The curve is calcu lated according to the equation of the linear interpolation y x x1 y1 y0 x1 x0 y1 The influence of the linearization can be estimated via the process data on the monitor or on the oscilloscope For the input of the characteristics linearization the WPC 300 program provides a table a...

Page 28: ...defined With the MIN value the overlap dead band of the valve will be compen sated Via the TRIGGER the activation point of the MIN function is set and so a non sensitive range around the zero point1 can be specified CAUTION If the MIN value is set too high it influences the minimal velocity which cannot be adjusted any longer 1 This dead band is necessary in order to avoid unrequested activations ...

Page 29: ...is defined in of the nominal current see CURRENT command Depending on internal calculations the setting at higher frequencies is only possible in steps Al ways the next higher step is chosen CAUTION The PPWM and IPWM parameters influence the effect of the dither setting These param eters should not be changed again after the dither has been optimized CAUTION If the PWM frequency is less than 500 H...

Page 30: ... 2604 Hz The optimum frequency depends on the valve Attention The PPWM and IPWM parameters should be adapted when using low PWM frequencies because of the longer dead times which forces a reduced stability of the closed loop control 5 6 5 ACC Auto adaptation of the closed loop current controller Command Parameters Unit Group ACC x x ON OFF EXP Operation mode of the closed loop current control ON I...

Page 31: ...s are done automatically If the PWM frequency is 250 Hz the dynamic of the current controller has to be decreased Typical values are PPWM 1 3 and IPWM 40 80 If the PWM frequency is 1000 Hz the default values of PPWM 7 and IPWM 40 should be chosen 5 7 Process data Monitoring Command Description Unit W C X XR U Command value after input scaling Command value after ramp function Feedback value Feedba...

Page 32: ...ze faults CAUTION If using the RC Remote Control mode all safety aspects have to be checked solidly In this mode the module is actuated directly and the machine control has no influence on the module FAULT CAUSE SOLUTION ENABLE is active the module does not re spond and the READY LED is off Probably the power supply is disconnected or the ENABLE signal is not present If there is no power supply th...

Page 33: ...in compatibility to older modules the AUTO BAUDRATE DETECTION should be preferred For updating the firmware the Fix Baudrate has to be set to 57 6 KBaud 6 3 2 Output current adjustment MIN_MAX RCURR The current command now needs the rated current value of the valve solenoid All parameters MIN MAX DAMPL are in and directly related to the rated current The advantages are clear and simple adjustments...

Page 34: ...sed for an arbitrary command name expandable by an index Indexed commands are indicated by the sign I or I i dummy is for the index E g an index can be A or B depending on the direction x parameter value in case of special commands more than one parameter are possible Examples MIN A 2000 nnnn MIN i A and x 2000 OFFSET 50 nnnn OFFSET and x 50 C IC 2000 nnnn C i IC and x 2000 ...

Page 35: ...Page 35 of 35 PAM 195 P S3 05 06 2020 7 Notes ...

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