W.E.ST. MDR-133-U Guide

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

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CONTENTS
1General Information.......................................................................................................................................... 4
1.1 Order number...........................................................................................................................................4
1.2 Scope of supply........................................................................................................................................4
1.3 Accessories..............................................................................................................................................4
1.4 Symbols used...........................................................................................................................................5
1.5 Using this documentation..........................................................................................................................5
1.6 Legal notice..............................................................................................................................................5
1.7 Safety instructions....................................................................................................................................6
2Characteristics................................................................................................................................................. 7
2.1 Compatibility.............................................................................................................................................8
2.2 Device description....................................................................................................................................9
3Use and application........................................................................................................................................ 10
3.1 Installation instructions............................................................................................................................10
3.2 Typical system structure .........................................................................................................................11
3.3 Method of operation................................................................................................................................11
3.4 Commissioning.......................................................................................................................................12
4Technical description...................................................................................................................................... 13
4.1 Input and output signals..........................................................................................................................13
4.2 LED definitions.......................................................................................................................................14
4.3 Circuit diagram.......................................................................................................................................15
4.4 Typical wiring .........................................................................................................................................16
4.5 Connection examples .............................................................................................................................16
4.6 Technical data........................................................................................................................................17
5Parameters.................................................................................................................................................... 18
5.1 Parameter overview................................................................................................................................18
5.2 Configuration..........................................................................................................................................19
5.2.1 LG (Changing the language)........................................................................................................... 19
5.2.2 MODE (Switching between parameter groups)................................................................................ 19
5.2.3 SENS (Malfunction monitoring)....................................................................................................... 19
5.2.4 CDWIN (Control deviation window)................................................................................................. 20
5.2.5 EOUT (Output signal: READY = OFF)............................................................................................. 20
5.3 Input signal adaptation............................................................................................................................21
5.3.1 SYS_RANGE (Sytem pressure)...................................................................................................... 21
5.3.2 SIGNAL (Type of input) .................................................................................................................. 21
5.3.3 N_RANGE:X (Nominal pressure of the sensor) ............................................................................... 21
5.3.4 OFFSET:X (Sensor offset).............................................................................................................. 22
5.3.5 Using of the commands SYS_RANGE, N_RANGE:X and OFFSET:X .............................................. 22
5.4 Ramp function........................................................................................................................................23
5.4.1 RA (Command signal ramp times) .................................................................................................. 23
5.5 Closed loop control parameters...............................................................................................................24
5.5.1 PID controller................................................................................................................................. 24
5.5.2 Integrator control function............................................................................................................... 25
5.6 Output signal adaptation.........................................................................................................................26
5.6.1 MIN (Deadband compensation) ...................................................................................................... 26
5.6.2 MAX (Output scaling) ..................................................................................................................... 26
5.6.3 TRIGGER (Response threshold for the MIN parameter) .................................................................. 26
5.6.4 SIGNAL:U (Type and polarity of the output signal)........................................................................... 27
5.7 Special commands................................................................................................................................. 28
5.7.1 TS (Sample time)........................................................................................................................... 28
5.7.2 AINMODE (Input scaling mode)...................................................................................................... 28

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5.7.3 AIN (Analogue input scaling)...........................................................................................................28
5.8 PROCESS DATA (Monitoring).................................................................................................................29
6Appendix........................................................................................................................................................30
6.1 Failure monitoring...................................................................................................................................30
6.2 Troubleshooting......................................................................................................................................31
6.3 Description of the command structure......................................................................................................33
7ADDITIONAL INFORMATION: Power output stage .........................................................................................34
7.1 General function .....................................................................................................................................34
7.2 Device description...................................................................................................................................35
7.3 Inputs and outputs ..................................................................................................................................36
7.4 Circuit diagram........................................................................................................................................36
7.5 Typical wiring..........................................................................................................................................37
7.6 Technical data........................................................................................................................................37
7.7 Parameters.............................................................................................................................................39
7.7.1 Parameter overview........................................................................................................................39
7.8 Changed parameters from U-version.......................................................................................................39
7.8.1 SIGNAL:U (Polarity of the output signal)..........................................................................................39
7.8.2 SIGNAL:M (Type of the monitor output signal).................................................................................39
7.9 Parameter description of the power stage................................................................................................40
7.9.1 CURRENT (Rated output current)...................................................................................................40
7.9.2 DFREQ (Dither frequency)..............................................................................................................40
7.9.3 DAMPL (Dither amplitude) ..............................................................................................................40
7.9.4 PWM (PWM Frequenz)...................................................................................................................41
7.9.5 ACC (Current loop ato adjustment ).................................................................................................41
7.9.6 PPWM (Solenoid current controller P element)................................................................................41
7.9.7 IPWM (Solenoid current controller I element)...................................................................................41
8Notes.............................................................................................................................................................42

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1 General Information
1.1 Order number
MDR-133-U
1
-2030
2
- with programmable output (0… 10 V or 4… 20 mA) and analogue sensor interface
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
The scope of supply includes the module plus the terminal blocks which are 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)
1
Compared with older versions (ordering code Afor voltages output and Ifor current output) the code U(universal) is
used for programmable outputs.
2
The number of the version consists of the hardware version (first two digits) and the software version (last two digits).
Because of the development of the products these numbers can vary. They are not strictly necessary for the order. We will
always deliver the newest version.

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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. Elektronik GmbH
Gewerbering 31
D-41372 Niederkrüchten
Tel.: [phone]
Fax.: [phone]
Home page: www.w-e-st.de or www.west-electronics.com
EMAIL: [e-mail]
Date: 29.08.2019
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 are non-binding. No claims may
be made based on them.
This document is protected by copyright.

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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. g. accident prevention and environmental
protection) must be complied with.
These modules are designed for hydraulic applications in open or closed-loop control circuits.
Uncontrolled movements can be caused by device defects (in the hydraulic module or the
components), application errors and electrical faults. Work on the drive or the electronics must
only be carried out whilst the equipment is switched off and not under pressure.
This handbook describes the functions and the electrical connections for this electronic
assembly. All technical documents which pertain to the system must be complied with when
commissioning.
This device may only be connected and put into operation by trained specialist staff. The
instruction 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 failure of
components cannot, however, be excluded. Despite extensive testing the same also applies
for the software. If these devices are deployed in safety-relevant applications, suitable external
measures must be taken to guarantee the necessary safety. The same applies for faults which
affect safety. No liability can be assumed for possible damage.
Further instructions
The module may only be operated in compliance with the national EMC regulations. It is
the user’s responsibility to adhere to these regulations.
The device is only intended for use in the commercial sector.
When not in use the module must be protected from the effects of the weather,
contamination and mechanical damage.
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.

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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. In many cases the opti-
mization without further test equipment (only a pressure sensor is needed) can be carried out.
The output signal is available as 0…10 V or 4… 20 mA signal for the direct connection of valves with inte-
grated electronics. Also external amplifiers and power plugs can be used.
Alternatively, the controller (P-version) is available with an integrated power output stage (see additional
information: POWER OUTPUT STAGE). The advantage of the integrated power output stage is founded in the
integrated control behavior without additional dead times. This allows higher dynamics and higher stability
respectively.
The start-up procedure is supported by our software tool WPC-300 (free download from our homepage).
Typical applications: pressure control with pressure limitation valves and/or pressure reducing valves.
Features
Analogue pressure command and actual values
Special pressure control concept for pressure reducing and relief valves
Optimized controller for pressure closed loop control
Integrated functions to prevent pressure overshoots
Simple optimizing of the controller
Ramps for pressure loading and unloading
Simple and application orientated parameter settings
Standard USB interface
Fault diagnosis and extended function checking
Simplified parameterization with WPC-300 software
Optional with power output stage (P version)

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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.
FIXBAUDRATE = 57600 and/or AUTO BAUDRATE DETECTION = 57600
4. Technical enhancements:
a. Programmable analogue output: only one version (Uinstead Aand I) is necessary
b. Optional: Start-up support
Parameterization:
1. Standardizing of parameter names
2. Simplified and intuitive parameterization of the analogue inputs and sensors
3. Compatibility mode of the input scaling (AINMODE), if necessary
4. Adaptation of the output signal (current or voltages) and the polarity with the command SIGNAL:U
(the POL commando is removed)
5. Adaptation of the monitoring output signals (current or voltages) with the command SIGNAL:M
(only available in P-version)

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2.2 Device description
Standard module –for the P-Version look at point 7.2
V:
ID:
Add.:Date:
Made in Germany
W.E.ST.
Ready
1 2 3 4
5 6 7 8
910 11 12
14 15 1613
D-41372 Niederkrüchten
Homepage: http://www.w-e-st.de
W.E.ST. Elektronik
13 14 15
910 11 12
16
A B
Klemmblöcke (steckbar)
Terminals (removable)
LEDs
USB-Interface
Typenschild undAnschlussbelegung
Type plate and terminal pin assignment
23,0000 mm99,0000 mm
114,0000 mm

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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.
Typical installation location: 24 V control signal area (close to PLC)
The devices must be arranged in the control cabinet so that the power section and the signal section
are separate from each other.
Experience shows that the installation place close to the PLC (24 V area) is most suitable. All digital
and analogue inputs and outputs are fitted with filters and surge absorbers in the device.
The module should be installed and wired in accordance with the documentation bearing in mind EMC
principles. If other consumers are operated with the same power supply, a star-shaped ground wiring
scheme is recommended. The following points must be observed when wiring:
The signal cables must be laid separately from power cables.
Analogue signal cables must be screened.
All other cables must be screened if there are powerful interference sources (frequency
converters, power contactors) and cable lengths > 3 m. 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
possible. 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 provided
where there are differences between the connected electrical components.
If having longer lengths of cable (> 10 m), the diameters and screening measures should
be checked by specialists (e. g. for possible interference, noise sources and voltage drop).
Special care is required if using cables of over 40 m in length, and if necessary the
manufacturer should be consulted if necessary.
A low-resistance connection between PE and the mounting rail should be provided. Transient
interference is transmitted from the module directly to the mounting rail and from there to the local
earth.
Power should be supplied by a regulated power supply unit (typically a PELV system complying with
IEC364-4-4, secure low voltage). The low internal resistance of regulated power supplies gives better
interference voltage dissipation, which improves the signal quality of high-resolution sensors in
particular. 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.