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W.E.ST. MDR-133-U Technical Documentation Manual

Pressure control module
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Technical Documentation
MDR-133-U
MDR-133-P
Pressure control module

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Summary of Contents for W.E.ST. MDR-133-U

  • Page 1 Technical Documentation MDR-133-U MDR-133-P Pressure control module...

  • Page 2: Table Of Contents

    CONTENTS General Information............................4 Order number ............................4 Scope of supply ............................4 Accessories .............................. 4 Symbols used ............................5 Using this documentation .......................... 5 Legal notice .............................. 5 Safety instructions ............................ 6 Characteristics ..............................7 Compatibility............................. 8 Device description ............................ 9 Use and application ............................
  • Page 3 5.7.3 AIN (Analogue input scaling) ......................28 PROCESS DATA (Monitoring) ......................... 29 Appendix ................................ 30 Failure monitoring ........................... 30 Troubleshooting ............................31 Description of the command structure ...................... 33 ADDITIONAL INFORMATION: Power output stage ..................34 General function ............................. 34 Device description ...........................

  • Page 4: General Information

    1 General Information 1.1 Order number - with programmable output (0… 10 V or 4… 20 mA) and analogue sensor interface MDR-133-U -2030 MDR-133-P-2030 - with additional power output stage up to 2,6 A (see additional information) Alternative Products MDR-137-P-2030 - with integrated power stage up to 2,6 A and analogue interface 1.2 Scope of supply...

  • Page 5: Symbols Used

    1.4 Symbols used General information Safety-related information 1.5 Using this documentation Structure of the documentation: The standard product is descibed up to chapter 6. The extensions like POWER STAGE or SSI-INTERFACE are described in the chapters ADDITIONAL INFORMATION. 1.6 Legal notice W.E.St.

  • Page 6: Safety Instructions

    1.7 Safety instructions Please read this document and the safety instructions carefully. This document will help to define the product area of application and to put it into operation. Additional documents (WPC-300 for the start-up software) and knowledge of the application should be taken into account or be available. General regulations and laws (depending on the country: e.

  • Page 7: Characteristics

    2 Characteristics This module was developed for controlling of pressure and force in hydraulic systems. The controller structure is optimized for pressure closed-loop control systems with typical pressure valves. The controller works in a bypass control function, where the input signal is linked directly to the control output (pressure valve) and the PID compensator has to control the linearity deviations only.

  • Page 8: Compatibility

    2.1 Compatibility As a result of further developments some smaller changes have to be taken in consideration. Functionality: 1. Downward compatible to the older modules. 2. 100 % wiring compatible. 3. Baud rate: The default baud rate has changed from 9600 baud to 57600 baud. This is adaptable in WPC-300: OPTIONS/SETTINGS/INTERFACE.

  • Page 9: Device Description

    2.2 Device description Standard module – for the P-Version look at point 7.2 99,0000 mm 23,0000 mm 9 10 11 12 13 14 15 114,0000 mm 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 W.E.ST.

  • Page 10: Use And Application

    3 Use and application 3.1 Installation instructions  This module is designed for installation in a shielded EMC housing (control cabinet). All cables which lead outside must be screened; complete screening is required. It is also necessary to avoid strong electro-magnetic interference sources being installed nearby when using our open and closed loop control modules.

  • Page 11: Typical System Structure

    3.2 Typical system structure This minimal system consists of the following components: (*1) Pressure relieve valve (alternative: pressure controlled servo pump) (*2) Cylinder / actuator (*3) MDR-133 pressure controller (*4) Interface to PLC (*5) Pressure or force sensor 3.3 Method of operation This module is useful for pressure control in very different applications.The output signal controls various pressure valves (with integrated electronics or external power amplifier as well as with power plugs).

  • Page 12: Commissioning

    3.4 Commissioning Step Task Install the device in accordance with the circuit diagram. Ensure it is wired cor- Installation rectly and that the signals are well shielded. The device must be installed in a protective housing (control cabinet or similar). Switching on for the first time Ensure that no unwanted movement is possible in the drive (e.

  • Page 13: Technical Description

    4 Technical description 4.1 Input and output signals Connection Supply PIN 3 Power supply (see technical data) PIN 4 0 V (GND) connection Connection Analogue signals PIN 11 0 V (GND) connection PIN 12 Reference output voltage Command value input (W), signal range 0… 10 V or 4… 20 mA, scalable PIN 13 Actual value input (X), signal range 0…...

  • Page 14: Led Definitions

    4.2 LED definitions LEDs Description of the LED function GREEN Identical to the READY output. OFF: No power supply or ENABLE is not activated System is ready for peration Flashing: Error discovered Only active when SENS = ON Identical to the STATUS output. YELLOW A OFF: The axis is outside the CDWIN window.

  • Page 15: Circuit Diagram

    4.3 Circuit diagram Page 15 of 42 MDR-133-*-2030 29.08.2019...

  • Page 16: Typical Wiring

    4.4 Typical wiring Status power supply Ready Enable Ramp 10 V Reference voltage output shield pressure command value (0..10V oder 4..20mA) To power amplifier / 0... 10V / 4... 20mA proportional valve. actual pressure value (0..10V oder 4..20mA) 4.5 Connection examples e.g.

  • Page 17: Technical Data

    4.6 Technical data 12… 30 (incl. ripple) Supply voltage (Ub) [VDC] Power consumption max. 2,5 External protection 1 medium time lag Digital inputs < 2 > 10 Input resistance [kOhm] Digital outputs < 2 max. U Maximum current [mA] Analogue inputs Unipolar / differential 0…...

  • Page 18: Parameters

    5 Parameters 5.1 Parameter overview Group Command Default Unit Description Basic parameters Changing language help texts MODE Parameter view SENS Malfunction monitor CDWIN 2000 mbar Size of the control deviation window EOUT 0,01 % Output signal if not ready Input signal adaptation SYS_RANGE System pressure Sensor scaling...

  • Page 19: Configuration

    5.2 Configuration 5.2.1 LG (Changing the language) Command Parameters Unit Group x= DE|EN Either German or English can be selected for the help texts. CAUTION: After changing the language settings, the ID button (SPEED BUTTON) in the menu bar (WPC-300) must be pressed (module identification). 5.2.2 MODE (Switching between parameter groups) Command...

  • Page 20: Cdwin (Control Deviation Window)

    5.2.4 CDWIN (Control deviation window) Command Parameters Unit Group CDWIN x= 100… 50000 mbar This parameter is entered in µm. The CDWIN command defines a range for which the STATUS message is generated. This function monitors the failure between the command and actual position. If the failure is less than the programmed value a CDWIN message is given to the status output (see Pin description).

  • Page 21: Input Signal Adaptation

    5.3 Input signal adaptation 5.3.1 SYS_RANGE (Sytem pressure) Command Parameters Unit Group SYS_RANGE x x= 10… 1000 This command defines the full working range, which corresponds to 100 % of the command signal. If the demand is set incorrectly, this leads to incorrect system settings, and the dependent parameters cannot be calculated correctly.

  • Page 22: Offset:x (Sensor Offset)

    5.3.4 OFFSET:X (Sensor offset) Command Parameter Unit Group OFFSET:X x= -60000… 60000 mbar EASY Adjustment of the zero point of the sensor. The OFFSET:X is internally limited to SYS_RANGE. 5.3.5 Using of the commands SYS_RANGE, N_RANGE:X and OFFSET:X With these commands, the feedback sensor is scaled. Suppose you have a pressure control with the following characteristics: ...

  • Page 23: Ramp Function

    5.4 Ramp function 5.4.1 RA (Command signal ramp times) Command Parameters Unit Group RA:I i= UP|DOWN x= 1… 600000 Two quadrant ramp function. The ramp time is set separately for increasing pressure (UP) and decreasing pressure (DOWN). A:DOWN A:UP Page 23 of 42 MDR-133-*-2030 29.08.2019...

  • Page 24: Closed Loop Control Parameters

    5.5 Closed loop control parameters 5.5.1 PID controller Command Parameters Unit Group x= 0… 10000 0,01 x= 0… 30000 0,1 ms x= 0… 1200 0,1 ms C:D_T1 x= 0… 1000 0,1 ms C:FF x= 0… 10000 0,01 % The control function will be parameterized via this command. The P, I and D gain are similar to a standard PID controller.

  • Page 25: Integrator Control Function

    5.5.2 Integrator control function Command Parameter Unit Group C:I_LIM x= 0… 10000 0,01 % C:I_ACT x= 0… 10000 0,01 % The integrator function is controlled by this command. C:I_LIM Limitation of the integrator range (faster control function by reduced pressure overshoots). By a high nonlinearity of the valve the LIM value must be sufficient to compensate it.

  • Page 26: Output Signal Adaptation

    5.6 Output signal adaptation 5.6.1 MIN (Deadband compensation) 5.6.2 MAX (Output scaling) 5.6.3 TRIGGER (Response threshold for the MIN parameter) Command Parameters Unit Group x= 0… 6000 0,01 % x= 4000… 10000 0,01 % TRIGGER x= 0… 3000 0,01 % With this command, the output signal is adjusted to the valve characteristics.

  • Page 27: Signal:u (Type And Polarity Of The Output Signal)

    5.6.4 SIGNAL:U (Type and polarity of the output signal) Command Parameter Unit Group SIGNAL:U U0-10 I4-20 U10-0 I20-4 This command is used to define the output signal (voltage or current) and to change the polarity Voltage output 0 to 100 % corresponds with 0… 10 V at PIN 15. Current output 0 to 100 % corresponds with 4…...

  • Page 28: Special Commands

    5.7 Special commands 5.7.1 TS (Sample time) Command Parameters Unit Group x= 4… 30 0,1 ms TERMINAL The control dynamics can be influenced with the sample time. Changes should only be made by persons who have sufficient knowledge of the dynamic system behavior. 5.7.2 AINMODE (Input scaling mode) Command Parameter...

  • Page 29: Process Data (Monitoring)

    “C” value is the offset (e.g. to compensate the 4 mA in case of a 4… 20 mA input signal). The variables are defining the gain factor with which the signal range is scaled up to 100 % (e.g. 1.25 if using 4…...

  • Page 30: Appendix

    6 Appendix 6.1 Failure monitoring Following possible error sources are monitored continuously when SENS = ON/AUTO: Source Fault Characteristic Command signal PIN 13 Out of range or broken wire The output will be switched off. 4... 20 mA Feedback signal PIN 14 Out of range or broken wire The output will be switched off.

  • Page 31: Troubleshooting

    6.2 Troubleshooting It is assumed that the device is in an operable state and there is communication between the module and the WPC-300. Furthermore, the valve control parameterization has been set with the assistance of the valve data sheets. The RC mode in monitor window can be used to analyze faults. CAUTION: All safety aspects must be thoroughly checked when working with the RC (Remote Control) mode.
  • Page 32 FAULT CAUSE / SOLUTION ENABLE and START are In this case, the integrator threshold (activation point of the integrator) in combination with the controller setting is too high. The parameter LIM: S should be reduced. active, the READY LED is active, and the pressure control loop works.

  • Page 33: Description Of The Command Structure

    6.3 Description of the command structure The command structure: [nnnn:i x] or [nnnn Meaning: nnnn - used for an arbitrary command name nnnn: - used for an arbitrary command name, expandable by an index. Indexed commands are indicated by the sign “:” i oder I - is a dummy for the index.

  • Page 34: Additional Information: Power Output Stage

    7 ADDITIONAL INFORMATION: Power output stage 7.1 General function The power output stages have been developed for controlling proportional valves without spool position feedback. The output stage is controlled by the microcontroller on the basic module by means of pulse width modulated signals, and the current is continuously controlled.

  • Page 35: Device Description

    7.2 Device description 99,0000 mm 45,0000 mm 13 14 15 16 25 26 27 28 13 14 15 16 29 30 31 32 114,0000 mm Made in Germany Date: Add.: W.E.ST. Elektronik D-41372 Niederkrüchten Homepage: http://www.w-e-st.de Typenschild und Anschlussbelegung 18 19 20 Type plate and terminal pin assignment 22 23 24 W.E.ST.

  • Page 36: Inputs And Outputs

    7.3 Inputs and outputs Connection Signal description Power supply: 10… 30 VDC: For safety-related applications, the output stage PIN 22 + can be deactivated thanks to the separate power supply inputs. PIN 24 - PIN 17 + 19 Solenoid current output A Connection Signals modified from the standard U version 0…...

  • Page 37: Typical Wiring

    7.5 Typical wiring CAUTION: The solenoid cables should be screened due to electro-magnetic emissions. CAUTION: plugs with free-wheeling diodes and LED indicators cannot be used with current- controlled power outputs. They interfere with the current control and can destroy the output stage.
  • Page 38 Page 38 of 42 MDR-133-*-2030 29.08.2019...

  • Page 39: Parameters

    7.7 Parameters 7.7.1 Parameter overview Command Default Unit Description CURRENT 1000 Output current range DFREQ Dither frequency DAMPL 0,01 % Dither amplitude 2604 PWM frequency Automatical calculation of the PPWM and IPWM parameter PPWM Current control loop PI control dynamics IPWM SIGNAL:U Output polarity...

  • Page 40: Parameter Description Of The Power Stage

    7.9 Parameter description of the power stage 7.9.1 CURRENT (Rated output current) Command Parameters Unit Group CURRENT x= 500… 2600 The nominal output current is set. Dither and also MIN/MAX always refer to this current range. 7.9.2 DFREQ (Dither frequency) 7.9.3 DAMPL (Dither amplitude) Command...

  • Page 41: Pwm (Pwm Frequenz)

    7.9.4 PWM (PWM Frequenz) Command Parameter Unit Group x= 61… 2604 The frequency can be changed in defined steps (61 Hz, 72 Hz, 85 Hz, 100 Hz, 120 Hz, 150 Hz, 200 Hz, 269 Hz, 372 Hz, 488 Hz, 624 Hz, 781 Hz, 976 Hz, 1201 Hz, 1420 Hz, 1562 Hz, 1736 Hz, 1953 Hz, 2232 Hz and 2604 Hz).

  • Page 42: Notes

    8 Notes Page 42 of 42 MDR-133-*-2030 29.08.2019...

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Mdr-133-p

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