WEST PQP-171-P Technical Documentation Manual
  1. Manuals
  2. Brands
  3. WEST Manuals
  4. Control Unit
  5. PQP-171-P
  6. Technical documentation manual

WEST PQP-171-P Technical Documentation Manual

Universal pump control module
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Technical Documentation
PQP-171-P
Universal pump control module

Advertisement

Table of Contents
loading

Summary of Contents for WEST PQP-171-P

  • Page 1 Technical Documentation PQP-171-P Universal pump control module...

  • Page 2: Table Of Contents

    TRIGGER (Response threshold for the MIN parameter) ..............26 5.5.4 SIGNAL:U (Output polarity) ........................27 Power stage..............................28 5.6.1 CURRENT (Rated solenoid current) ..................... 28 5.6.2 DFREQ (Dither frequency) ........................28 5.6.3 DAMPL (Dither amplitude) ........................28 Page 2 of 34 PQP-171-P 05.06.2020...
  • Page 3 Special commands ............................30 5.7.1 AINMODE (Scaling mode) ........................30 5.7.2 AIN (Analogue input scaling) ........................ 30 PROCESS DATA (Monitoring)........................31 Appendix ................................32 Failure monitoring ............................32 Troubleshooting ............................32 Notes ..................................34 Page 3 of 34 PQP-171-P 05.06.2020...

  • Page 4: General Information

    1 General Information 1.1 Order number PQP-171-P pump control module with integrated power output stage up to 2,6 A and analouge sensor interface 1.2 Scope of supply The scope of supply includes the module plus the terminal blocks which are part of the housing.

  • Page 5: Symbols Used

    We reserve the right to make technical modifications due to further development of the product described in this manual. The technical information and dimensions are non-binding. No claims may be made based on them. This document is copyright. Page 5 of 34 PQP-171-P 05.06.2020...

  • Page 6: Safety Instructions

     The module may not be used in an explosive environment.  To ensure adequate cooling the ventilation slots must not be covered.  The device must be disposed of in accordance with national statutory provisions. Page 6 of 34 PQP-171-P 05.06.2020...

  • Page 7: Characteristics

    PWM frequency  Output current up to 2,6 A  Adaptable to all standard proportional valves  Application orientated parameter settings  Fault diagnosis and extended function checking  Simplified parameterization with WPC-300 software Page 7 of 34 PQP-171-P 05.06.2020...

  • Page 8: Device Description

    Made in Germany Date: Add.: W.E.ST. Elektronik D-41372 Niederkrüchten Homepage: http://www.w-e-st.de Typenschild und Anschlussbelegung Type plate and terminal pin assignment LEDs Ready Klemmblöcke (steckbar) Terminals (removable) Interface 9 10 11 12 14 15 16 Page 8 of 34 PQP-171-P 05.06.2020...

  • Page 9: Use And Application

    Switched inductances (relays and valve coils) which are connected to the same power supply must always be provided with appropriate overvoltage protection directly at the coil. Page 9 of 34 PQP-171-P 05.06.2020...

  • Page 10: Typical System Structure

    (*2) Servo pump (*3) Swivel angel sensor (*4) Pump controller PQP-171-P (*5) Interface to PLC 3.3 Method of operation This swivel angel controller is driven via an analogue signal. The ENABLE signal (typical 24 V) activates the functionality and reports this at a READY output if no error occurs.
  • Page 11 Picture 1: valve with one solenoid Picture 2: valve with two solenoids Page 11 of 34 PQP-171-P 05.06.2020...

  • Page 12: Commissioning

    Controller optimization Now optimize the settings. The PID parameters have to be adapted depending on the application. Page 12 of 34 PQP-171-P 05.06.2020...

  • Page 13: Technical Description

    Both yellow LEDs flash oppositely every 1 s: The nonvolatile stored parameters are in- consistent! To acknowledge the error, data has to be saved with the SAVE command or YELLOW B the corresponding button in the WPC. Page 13 of 34 PQP-171-P 05.06.2020...

  • Page 14: Circuit Diagram

    4.3 Circuit diagram Page 14 of 34 PQP-171-P 05.06.2020...

  • Page 15: Typical Wiring

    8V PIN 12 +In PIN 9 + 13 +In PIN 9 -In PIN 10 + 14 -In PIN 10 GND PIN 11 GND PIN 11 Alternative 3 – wire connection of two solenoids: A-Solenoid B-Solenoid Page 15 of 34 PQP-171-P 05.06.2020...

  • Page 16: Technical Data

    < 95 (non-condensing) Vibration resistance IEC 60068-2-6 (Category C) Connections Communication USB type B Plug connectors 4 x 4-pole terminal blocks via the DIN mounting rail EN 61000-6-2: 8/2005 EN 61000-6-4: 6/2007 + A1:2011 Page 16 of 34 PQP-171-P 05.06.2020...

  • Page 17: Parameters

    Output signal adaptation MIN:A 0.01 % Deadband compensation MIN:B 0.01 % MAX:A 10000 0.01 % Output scaling MAX:B 10000 0.01 % TRIGGER 0.01 % Deadband compensation trigger point SIGNAL:U Type and polarity of the output Page 17 of 34 PQP-171-P 05.06.2020...
  • Page 18 I-Gain of the current loop Special commands Scaling mode AINMODE EASY Input scaling mode AIN:X 1000 Free scaling of the analogue inputs. Gets activated when AINMODE is switched over to MATH. AIN:W 1000 0.01 % Page 18 of 34 PQP-171-P 05.06.2020...

  • Page 19: Basic Parameters

    Command Parameters Unit Group CTRL x= OL|CL Switching the control function between OL (open loop) for direct control of the solenoid current and CL (closed loop) for using extended PID controller with feedback sensor. Page 19 of 34 PQP-171-P 05.06.2020...

  • Page 20: Ccmode (Characteristics Linearization)

    |EOUT| = 0 The output is switched off in the event of an error. This is normal behavior. CAUTION! The output value defined here is stored permanently (independently of the parameter set). The effects should be analyzed by the user for each application from the point of view of safety. Page 20 of 34 PQP-171-P 05.06.2020...

  • Page 21: Insignal Adaptation

    100% if possible- 5.3.3 OFFSET:X (Sensor offset) Command Parameter Unit Group OFFSET:X x= -60000… 60000 0.01 % EASY Adjustment of the zero point of the sensor. Reference value is always the working range. Page 21 of 34 PQP-171-P 05.06.2020...

  • Page 22: Ra (Command Signal Ramp Time)

    5.3.4 RA (Command signal ramp time) Command Parameter Unit Group RA:I i= UP|DOWN x= 1… 600000 Two quadrant ramp function. The ramp time is separately set for UP and DOWN ramps. A:DOWN A:UP Page 22 of 34 PQP-171-P 05.06.2020...

  • Page 23: Cc (Characteristics Linearization)

    For the input of the characteristics linearization, the WPC-300 program provides a table and a graphic data input. The input signal is mapped on to the X-axis and the output signal is mapped on to the Y-axis. Page 23 of 34 PQP-171-P 05.06.2020...

  • Page 24: Control Parameters

    (-> SIGNAL:U). Value 0 deactivates the integrator. C:OFFSET C_EXT:FF C_EXT:PT1 C_EXT:T1 w command ramp 0.. 10 V value scaling function 4.. 20 mA x feedback C:I_LIM 0.. 10 V value scaling 4.. 20 mA C:D_T1 Page 24 of 34 PQP-171-P 05.06.2020...

  • Page 25: Integrator Control Function

    The outcome of this is a stable control performance and a dynamic driving at the same time. This parameter is active only if valves with one solenoid are used (-> SIGNAL:U). Page 25 of 34 PQP-171-P 05.06.2020...

  • Page 26: Output Signal Adaptation

    This dead band is necessary, in order to avoid unrequested activations caused by small variations of the input signal. If this module is used in a position controls, the TRIGGER value should be reduced (typical: 1…10). Page 26 of 34 PQP-171-P 05.06.2020...

  • Page 27: Signal:u (Output Polarity)

     2S+: Two solenoids standard U > 0 -> Controlling IA U < 0 -> Controlling IB  2S-: Two solenoids switched U > 0 -> Controlling IB U < 0 -> Controlling IA Page 27 of 34 PQP-171-P 05.06.2020...

  • Page 28: Power Stage

    PWM frequency. The dither frequency should not be confused with the PWM fre- quency. In some documentations the PWM frequency is described as a dither. This can be recognized by the lack of the dither amplitude. Page 28 of 34 PQP-171-P 05.06.2020...

  • Page 29: Pwm (Pwm Frequency)

    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. Page 29 of 34 PQP-171-P 05.06.2020...

  • Page 30: Special Commands

    ). Last but not least ( ) has to be set to C choosing current signal. In this case AIN command would look like this: AIN:I 20 16 2000 C or AIN:I 1250 1000 2000 C (see below) Page 30 of 34 PQP-171-P 05.06.2020...

  • Page 31: Process Data (Monitoring)

    The process data are the variables which can be observed continuously on the monitor or on the oscilloscope. The display of the solenoid current (in WPC-300 program) is damped in order to be able to bring out a stable signal. Page 31 of 34 PQP-171-P 05.06.2020...

  • Page 32: Appendix

    A broken cable or incorrect cabling to the solenoids.  Internal data error: press the command/SAVE button to delete the data error. The system reloads the DEFAULT data. With the operating program the fault can be localized directly via the monitor. Page 32 of 34 PQP-171-P 05.06.2020...
  • Page 33 AIN:X 1250 600 2000 C (600 = 1000 * 240 bar / 400 bar). Maybe you have to adjust / optimize the solenoid control loop (P and I). In most applications (particularly pressure-actuated pumps) with pressure valves a lower PWM-frequency is the better solution. Page 33 of 34 PQP-171-P 05.06.2020...

  • Page 34: Notes

    7 Notes Page 34 of 34 PQP-171-P 05.06.2020...

Table of Contents