W.E.ST. PQ-132-U Guide

Technical Documentation
PQ-132-U
p/Q-controller, pressure limiting controller for hydraulic axes

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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 Legal notice..........................................................................................................................................................5
1.6 Safety instructions................................................................................................................................................6
2Characteristics..............................................................................................................................................................7
2.2 Compatibility.........................................................................................................................................................8
2.3 Device description................................................................................................................................................9
3Use and application.................................................................................................................................................... 10
3.1 Installation instructions .......................................................................................................................................10
3.2 Typical system structure.....................................................................................................................................11
3.3 Method of operation............................................................................................................................................12
3.3.1 General......................................................................................................................................................12
3.3.2 p/Q-pressure-control..................................................................................................................................12
3.3.3 Functionality...............................................................................................................................................12
3.4 Commissioning...................................................................................................................................................13
4Technical description.................................................................................................................................................. 14
4.2 Input and output signals .....................................................................................................................................14
4.3 LED definitions ...................................................................................................................................................15
4.4 Block diagram.....................................................................................................................................................16
4.5 Typical wiring......................................................................................................................................................17
4.6 Connection examples.........................................................................................................................................17
4.7 Technical data....................................................................................................................................................18
5Parameters................................................................................................................................................................. 19
5.2 Parameter overview............................................................................................................................................19
5.3 Basic parameters................................................................................................................................................21
5.3.1 LG (Changing the language)......................................................................................................................21
5.3.2 MODE (Parameter view)............................................................................................................................21
5.3.3 SENS (Malfunction monitor) ......................................................................................................................21
5.3.4 PIN:5 (Function of Pin 5)............................................................................................................................22
5.3.5 EOUT (Output signal if not ready)..............................................................................................................22
5.4 Input signal adaptation .......................................................................................................................................23
5.4.1 SYS_RANGE (System pressure)...............................................................................................................23
5.4.2 ARATIO (Cylinder area ratio).....................................................................................................................23
5.4.3 PRESET:Q (Internal preset value).............................................................................................................23
5.4.4 F_OFFSET (Feedback offset)....................................................................................................................24
5.4.5 SIGNAL (Type of input signal)...................................................................................................................24
5.4.6 N_RANGE (Nominal pressure of the sensor) ............................................................................................24
5.4.7 OFFSET (Sensor offset)............................................................................................................................24
5.5 Ramps and PID control parameters ...................................................................................................................25
5.5.1 RA (Command signal ramp time)...............................................................................................................25
5.5.2 C (PID control parameters)........................................................................................................................26
5.6 Output signal adaptation.....................................................................................................................................27
5.6.1 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
5.7.3 AIN (Free analogue input scaling) .............................................................................................................29

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5.8 PROCESS DATA (Monitoring)............................................................................................................................30
6Appendix.....................................................................................................................................................................31
6.1 Failure monitoring...............................................................................................................................................31
6.2 Troubleshooting..................................................................................................................................................32
6.3 Description of the command structure................................................................................................................33
7Notes..........................................................................................................................................................................34

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1 General Information
1.2 Order number
PQ-132-U
1
- with programmable analogue output (±10 V differential output or 4… 20 mA) and
analogue sensor interfaces
Extended versions
PPC-125-U-PDP - with programmable analogue output (±10 V differential output or 4… 20 mA) and
analogue sensor interfaces, integrated Profibus interface
UHC-126-U-PFN - with programmable analogue output (±10 V differential output or 4… 20 mA) and
analogue sensor interfaces, integrated Profinet interface
UHC-126-U-ETC - with programmable analogue output (±10 V differential output or 4… 20 mA) and
analogue sensor interfaces, integrated EtherCat interface
1.3 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.
1.4 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 programming cable.
1
Compared with older versions (ordering code Afor voltages output and Ifor current output) the code U(universal) is
used for programmable outputs.
2The 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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1.5 Symbols used
General information
Safety-related 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
EMAIL: [e-mail]
Date: 05.06.2020
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 pressure and force of hydraulic drives, worked out as a classical
p/Q controller (flow control with closed loop pressure limitation function). The command values are given by
analogue input signals and the module is controlled by digital inputs. Furthermore some feedback values and
status messages can be used there.
The output signal is available as an active differential output for direct connecting of control valves with inte-
grated electronics. Alternatively a current output can be parameterized.
The control loop uses a control cycle time of 1 ms (adjustable). The controller is equipped with two sets of pa-
rameters, which can be switched in case of critical applications with different operating points.
The following control parameters are programmable: P (proportional), I (integrating), D (differential) with D_T1
(T1 filter) and I_ACT (activating of the integrator).
Internally the system is monitored for several errors. Data, command signal and sensor errors will be dis-
played via the READY output and the corresponding LED.
The parameterization (USB interface) is supported by our WPC-300 program. Various functions support the
commissioning and troubleshooting. The operation is simple and problem-oriented, thus ensures a very short
training time.
Typical applications: electronic 3way pressure control (down to zero bar), feed drives with definable max
force as well as drives that have to follow an outline with constant force (polishing of surfaces).
Features
Analogue q–and p-command values
Simple and intuitive scaling of the sensor
Classical p/Q controller with pressure limitation (automatic switch over)
PID-controller with switchable parameter set
Data set for the pressure (force) in bar
Ramps for pressure up and down
Parameterset linked ramp times/detachable
Force- / pressure controller with one sensor
Differential pressure control with two pressure sensors
Fault diagnosis and extended function checking
Simplified parameterization with WPC-300 software

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2.2 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 (U instead A and I) is necessary
b. Double parameter set selectable via a command and input pin 5
c. current loop input for the Q - value
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)

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2.3 Device description
Standard module
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.