WEST PAM-140-P Leitfaden

Technical Documentation

PAM-140-P

Universal mobile power amplifier

Page 2 of 24 PAM-190-P-*-1010 18.08.2015

CONTENTS

1General Information.......................................................................................................................................... 3

1.1 Order number...........................................................................................................................................3

1.2 Scope of supply........................................................................................................................................3

1.3 Accessories..............................................................................................................................................3

1.4 Symbols used...........................................................................................................................................4

1.5 Legal notice..............................................................................................................................................4

1.6 Safety instructions....................................................................................................................................5

2Characteristics................................................................................................................................................. 6

2.1 Device description....................................................................................................................................7

3Use and application.......................................................................................................................................... 8

3.1 Installation instructions..............................................................................................................................8

3.2 Commissioning.........................................................................................................................................9

3.3 Manual parameterization.........................................................................................................................10

3.3.1 Parameter overview ....................................................................................................................... 10

3.3.2 Procedural method......................................................................................................................... 10

4Technical description...................................................................................................................................... 11

4.1 Input and output signals..........................................................................................................................11

4.2 LED definitions.......................................................................................................................................11

4.3 Circuit diagram.......................................................................................................................................12

4.4 Typical wiring .........................................................................................................................................13

4.5 Connection examples .............................................................................................................................13

4.6 Technical data........................................................................................................................................14

5Parameters.................................................................................................................................................... 15

5.1 Parameter overview................................................................................................................................15

5.2 Basic parameters....................................................................................................................................16

5.2.1 LG (Changing the language)........................................................................................................... 16

5.2.2 MODE (Parameter view)................................................................................................................. 16

5.3 Input signal adaptation............................................................................................................................17

5.3.1 AIN (Analogue input scaling)........................................................................................................... 17

5.3.2 LIM (Signal monitoring) .................................................................................................................. 18

5.3.3 R (Command signal ramp time) ...................................................................................................... 18

5.4 Output signal adaptation.........................................................................................................................19

5.4.1 MIN (Deadband compensation) ...................................................................................................... 19

5.4.2 MAX (Output scaling) ..................................................................................................................... 19

5.4.3 TRIGGER (Response threshold for the MIN parameter) .................................................................. 19

5.4.4 POL (Output polarity)...................................................................................................................... 20

5.5 Output signal adaptation.........................................................................................................................20

5.5.1 CURRENT (Rated current range).................................................................................................... 20

5.5.2 DFREQ (Dither frequency).............................................................................................................. 20

5.5.3 DAMPL (Dither amplitude).............................................................................................................. 20

5.5.4 PWM (PWM Frequency)................................................................................................................. 21

5.5.5 PPWM (P gain of the current loop).................................................................................................. 21

5.5.6 IPWM (I gain of the current loop) .................................................................................................... 21

5.6 PROCESS DATA (Monitoring)................................................................................................................22

6Appendix ....................................................................................................................................................... 23

6.1 Failure monitoring...................................................................................................................................23

6.2 Troubleshooting......................................................................................................................................23

7Notes............................................................................................................................................................. 24

Page 3 of 24 PAM-190-P-*-1010 18.08.2015

1 General Information

1.1 Order number

PAM-140-P-A-1010

- Power amplifier for proportional valves with 0…10 V input in IP65-version

PAM-140-P-I-1010 - Power amplifier for proportional valves with 4...20 mA input in IP65-version

Alternative and extended products

PAM-190-P -Power amplifier (plug) for proportional valves with M12 connection

PAM-193-P - Amplifier with potentiometers and DIL switches for top hat rail mounting

PAM-199-P -Universal digital amplifier with USB interface for top hat rail mounting

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)

ULA-310 - Programming device with USB interface

AKL-311 - Cable adapter to ULA-310

The number of the version consists of the hardware-version (first two digits) and the software-version (second 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.

Page 4 of 24 PAM-190-P-*-1010 18.08.2015

1.4 Symbols used

General information

Safety-related information

1.5 Legal notice

W.E.St.

Elektronik GmbH

Gewerbering 31

D-41372 Niederkrüchten

Tel.: +49 (0)2163 577355-0

Fax.: +49 (0)2163 577355-11

Home page: www.w-e-st.de or www.west-electronics.com

EMAIL: info@w-e-st.de

Date: 18.08.2015

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.

Page 5 of 24 PAM-190-P-*-1010 18.08.2015

1.6 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.

Page 6 of 24 PAM-190-P-*-1010 18.08.2015

2 Characteristics

This power amplifier is used to control proportional valves with one solenoid. The compact solution is imple-

mented in an inexpensive IP-65 housing.

A typical input signal of 0… 10 V (optional 4... 20 mA) can be used. The output current is closed loop con-

trolled and therefore independent from the supply voltage and a varying solenoid resistance.

The parameterization can be done via the PC interface and the ULA-310 adapter or internally via the UP and

DOWN buttons.

By the free parameterization of the power amplifier all typical proportional valves of the different manufactures

can be optimal adapted.

Typical applications: Controlling of the solenoid of proportional throttle or pressure valves.

Features

Power amplifier for proportional valves

Electronic board in a housing IP-65

Digital reproducible adjustments

Free scaling of the input signal

Reference output to supply potentiometers

Free parameterization of ramps, MIN and MAX, DITHER (frequency, amplitude) and

PWM frequency

Current range: 1 A, and 2,5 A

Simple and application orientated parameter settings

Failure monitoring and extended function check

Adjustments via LIN/USB interface, simplified parameterizing with WPC-300 software

Parameter settings via integrated buttons and a selector switch (reduced functionally against the

USB / LIN-bus)

Adaptable to all standard proportional valves

Page 7 of 24 PAM-190-P-*-1010 18.08.2015

2.1 Device description

58 mm

4,5 mm

PG11

64 mm

25 mm

34 mm

36 mm

46 mm

Selection

Switch/

Dreh-

schalter

Button Down/

TasteAb

Button Up/

TasteAuf

Operation LED/

Funktions LED Parameter LED/

Parameter LED

Page 8 of 24 PAM-190-P-*-1010 18.08.2015

3 Use and application

3.1 Installation instructions

All cables which lead outside must be screened; complete screening is required. It is also a require-

ment that no strong electro-magnetic interference sources are installed nearby when using our control

and regulation modules.

The equipment 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- connected

ground wiring scheme is recommended. The following points must be observed when wiring:

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 > 3m. Inexpensive SMD ferrites can be

used with high-frequency radiation.

The screening should be connected to PE (PE terminal) as close to the equipment as pos-

sible. 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.

With 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).

Particular care is required with cables of over 40 m in length –the manufacturer should be

consulted if necessary.

A low-resistance connection between PE and the mounting rail should be provided. Transient interfer-

ence is transmitted from the equipment 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 partic-

ular. Switched inductances (relays and valve coils connected to the same power supply) must always

be provided with appropriate overvoltage protection directly at the coil.

Page 9 of 24 PAM-190-P-*-1010 18.08.2015

3.2 Commissioning

Step

Task

Installation

Install the device in accordance with the circuit diagram. Ensure it is wired cor-

rectly and that the signals are well shielded.

Switching on for the first time

Ensure that no unwanted movement is possible in the drive (e.g. switch off the

hydraulics). Connect an ammeter and check the current consumed by the de-

vice. If it is higher than specified, there is an error in the wiring. Switch the de-

vice off immediately and check the wiring.

Setting up communication

Once the power input is correct the PC (notebook) should be connected via the

USB interface and the programming device ULA-310. Please see the WPC-

300 program documentation for how to set up communication.

Caution:

The communication works in a HALF DUPLEX process.

Further commissioning and diagnosis are supported by the operating software.

Alternatively, the set-up can be done by the internal parameter selector and the

UP and DOWN buttons.

Pre-parameterization

Parameterize now (with the help of the system redundancy and the connection

diagram) the following parameters:

The ANALOGUE INPUT, the output CURRENT and the typical valve parame-

ter DITHER and MIN/MAX.

Pre-parameterization is necessary to minimize the risk of an unintentional

movement / pressure.

Control signal

Check the control signal (output signal). The control signal (solenoid current)

lies in the range of 0... 2.5 A. In the current state it should show around 0 A.

The valve current can also be monitored in the WPC program.

Switching on the hydraulics

The hydraulics can now be switched on. The module is not yet generating a

signal. Drives should be at a standstill or drift slightly (leave its position at a

slow speed).

Activating command signal

CAUTION! The power stage is always active when power supply exists. The

output current to the valve will follow the input signal proportionally.

Controller optimization

Settings like ramp time or dead band compensation can now be done.

Page 10 of 24 PAM-190-P-*-1010 18.08.2015

3.3 Manual parameterization

3.3.1 Parameter overview

The manual adjustment is comparable with the adjustment via potentiometer. Not all parameter of the power

plug are available in this mode

Switch

position

Parameter

Setting range

Remark

DEFAULT

Released only by pressing the button "Up" and "DOWN"

simultaneously. Response: a short and fast flashing of

the LED.

CURRENT

0 | 1

0 = low current range; press button “DOWN“

1 = high current range; press button “UP“

MIN

0…60%

Deadband compensation

in relation to the current range

MAX

30…100%

Reduction in the maximum current

in relation to the current range

R:UP

50ms…5sec

Ramp time up

R:DOWN

50ms…5sec

Ramp time down

PWM

60…1500 Hz

PWM output frequency

No function

3.3.2 Procedural method

1. Press a button or turn the selector switch which activates the manual adjustment mode. The parame-

ter-LED flashes.

2. Select the desired parameter (1… 6) by the selector switch.

3. The parameter LED indicates - by flashing - the parameter mode.

a. At the lower boundary the LED lights only briefly

b. At the upper boundary the LED lights almost continuously

4. Press the UP or DOWN button.

a. A short activation of one of the buttons will change the parameter by a value of app. 1%.

b. A continual activation of one of the buttons will change the parameter continually (up to the

point where the upper or lower boundary is reached).

5. The parameters are stored automatically (app. 1 second after the last parameter adjustment). The

manual adjustment will be finished after 60 seconds.

The full functionality of the power plug is available via the PC interface only.

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