Features - W.E.ST. Elektronische Steuerungen e. K.

W.E.ST. Elektronik GmbH
Technical Documentation
DSG-111-A
DSG-111-I
DSG-111-P
Digital demand value module, alternatively with power output stage

W.E.ST. Elektronik GmbH
CONTENTS
1 General 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
2 Characteristics .................................................................................................................................7
2.1 Device description .........................................................................................................................8
3 Use and application .........................................................................................................................9
3.1 Installation instructions ..................................................................................................................9
3.2 Typical system structure .............................................................................................................. 10
3.3 Method of operation..................................................................................................................... 10
3.4 Commissioning ............................................................................................................................ 11
4 Technical description ..................................................................................................................... 12
4.1 Input and output signals ............................................................................................................... 12
4.2 LED definitions ............................................................................................................................ 13
4.3 Block diagram ............................................................................................................................. 14
4.4 Typical cabling ............................................................................................................................ 15
4.5 Connection examples .................................................................................................................. 15
4.6 Technical Data ............................................................................................................................ 16
5 Parameters .................................................................................................................................... 17
5.1 Parameter overview ..................................................................................................................... 17
5.2 Parameter description ................................................................................................................. 18
5.2.1 LG (Changing the language for the help texts)................................................................. 18
5.2.2 MODE (Switching between parameter groups) ................................................................ 18
5.2.3 DSEL (Deactivating S-Valid Input) ................................................................................... 18
5.2.4 RMODE (ramp function) .................................................................................................. 19
5.2.5 MF (linking of the external and internal command values)................................................ 19
5.2.6 EOUT (Output signal: READY = OFF) ............................................................................. 20
5.2.7 POL (output polarity) ....................................................................................................... 20
5.2.8 SENS (sensor monitoring) ............................................................................................... 20
5.2.9 AIN (Analogue input scaling) ........................................................................................... 21
5.2.10 RW (Four-Quadrant-Ramp for the analogue input) .......................................................... 21
5.2.11 S (command values of binary coded switch inputs).......................................................... 22
5.2.12 RA (ramp times) .............................................................................................................. 22
5.2.13 MIN (Deadband compensation) ....................................................................................... 23
5.2.14 MAX (Limitation / Gain ) .................................................................................................. 23
5.2.15 TRIGGER (Response threshold for the MIN parameter) .................................................. 23
5.2.16 PROCESS DATA (Monitoring) ........................................................................................ 24
6 Appendix ....................................................................................................................................... 25
6.1 Failure monitoring ........................................................................................................................ 25
6.2 Troubleshooting........................................................................................................................... 25
6.3 Description of the command structure .......................................................................................... 26
7 ADDITIONAL INFORMATION: Power output stage ........................................................................ 27
Page 2 of 34 DSG-111*-*1121 23.04.2012

W.E.ST. Elektronik GmbH
7.1 General function ..........................................................................................................................27
7.2 Device description .......................................................................................................................28
7.3 Inputs and outputs .......................................................................................................................29
7.4 Circuit diagram ............................................................................................................................29
7.5 Typical cabling.............................................................................................................................30
7.6 Technical data .............................................................................................................................30
7.7 Parameters ..................................................................................................................................31
7.7.1 Parameter overview ........................................................................................................31
7.8 Parameter description..................................................................................................................31
7.8.1 CURRENT (Current range switchover) ............................................................................31
7.8.2 DFREQ (Dither frequency) ..............................................................................................31
7.8.3 DAMPL (Dither amplitude)...............................................................................................31
7.8.4 PWM (PWM frequency) ...................................................................................................32
7.8.5 PPWM (Solenoid current controller P element) ................................................................32
7.8.6 IPWM (Solenoid current controller I element)...................................................................32
8 Notes.............................................................................................................................................33
Page 3 of 34 DSG-111*-*1121 23.04.2012

1 General Information
1.1 Order number
W.E.ST. Elektronik GmbH
DSG-111-A-1121 1 - with analogue ± 10 V output
DSG-111-I-1121 - with analogue 4… 20mA output
DSG-111-P-1121 - (see additional information) with integrated power output stage up to 2,6 A
Optional
DSG-164 - 4 digital selectable demand values, scalable via potentiometers
1.2 Scope of supply
To the scope of supply belongs the module including 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
RS232-SO - programming cable with RS232C interface
USB-SO - programming cable with USB interface
WPC-300 - Start-Up-Tool (downloadable – products/software)
1 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 34 DSG-111*-*1121 23.04.2012

1.4 Symbols used
General information
Safety-related information
1.5 Using this documentation
Structure of the documentation:
W.E.ST. Elektronik GmbH
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
Poststraße 26
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: 23.04.2012
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 nonbinding.
No claims may be made based on them.
This document is copyright.
Page 5 of 34 DSG-111*-*1121 23.04.2012

1.7 Safety instructions
W.E.ST. Elektronik GmbH
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 34 DSG-111*-*1121 23.04.2012

2 Characteristics
W.E.ST. Elektronik GmbH
This electronic module is designed to control hydraulic proportional valves. 16 programmable demand
values are selectable by four digital switching inputs (binary coded).
A ramp generator (4Q-ramps or 16 demand signal related ramps) allows flexible adjustments depending
on the applications. A programmable function is linking the analogue input signal and the internal demand
values together. MIN, MAX or scaling of the analogue input is possible.
The adjustment via RS232C is simple and easy to understand. A standard terminal program or our special
windows application software (WPC-300, download from our homepage) can be used.
Typical applications: Rapid traverse and creeping speed, selectable velocities and pressure values, flow
curve adjustments, ramp generation and analogue signal monitoring.
Features
16 selectable demand values
Four quadrant ramps or 16 selectable ramp times
Analogue input and demand values are combinable with following functions:
+, -, *, /, min, max
Deadband compensation
Parameter for valve adaptation (MIN, MAX, POL)
Fault diagnosis and extended function checking
Simplified parameterization with WPC-300 software version 3.2
Optionally:
o Integrated power output stage (P version)
Page 7 of 34 DSG-111*-*1121 23.04.2012

2.1 Device description
99,0000 mm
Made in Germany
Date: Add.:
ID:
V:
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. Elektronik GmbH
LEDs
RS232
Interface
9 10 11 12
13 14 15 16
1 2 3 4
5 6 7 8
W.E.ST.
Page 8 of 34 DSG-111*-*1121 23.04.2012
Ready
Status
9 10 11 12
13 14 15 16
23,0000 mm
114,0000 mm
Klemmblöcke (steckbar)
Terminals (removable)

3 Use and application
3.1 Installation instructions
W.E.ST. Elektronik GmbH
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.
Page 9 of 34 DSG-111*-*1121 23.04.2012

3.2 Typical system structure
W.E.ST. Elektronik GmbH
This minimal system consists of the following components:
(*1) Proportional valve (or control valve): the valve type determines the precision. It is expedient to
use control valves with integrated electronics.
(*2) Hydraulic cylinder (with servo seals)
(*3) DSG-111-AI control module
(*4) Interface to PLC with analogue and digital signals
3.3 Method of operation
This module can be used as a universal demand signal generator for different applications. The activation
of the internal programmed demand values can be realized by the binary inputs. Alternatively, the activation
of the demand values is also possible by the input S-VALID. Therefore, a synchronization with the
PLC is not so difficult.
Because of the mathematical combination of the internal demand value and the external analogue output
there exists a further possibility to support signal adaptations.
Consequently, this module is useful for signal adaptations, flow curve adjustments of control valves, rapid
traverse and creeping speed with several selectable velocities and accelerations as well as a universal
valve amplifier with integrated power amplifier.
Page 10 of 34 DSG-111*-*1121 23.04.2012

3.4 Commissioning
Step Task
W.E.ST. Elektronik GmbH
Installation Install the device in accordance with the circuit diagram. Ensure it is wired
correctly and that the signals are well shielded. The device must be installed in a
metal protective housing (control cabinet or similar).
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 device.
If it is higher than specified there is an error in the cabling. Switch the device off
immediately and check the cabling.
Setting up communication Once the power input is correct the PC (notebook) should be connected to the
serial interface. Please see the WPC-300 program documentation for how to set
up communication.
Further commissioning and diagnosis are supported by the operating software.
Pre-parameterization Configure the settings specific to the actuator (MIN for the overlap compensation
and MAX for maximum speed).
Enter the desired set points in the parameter table.
Control signal Check the control signal with a voltmeter. The control signal (PIN 15 to PIN16) lies
in the range of ± 10 V. In the current state it should be 0 V. Alternatively, if current
signals are used, approx. 0 mA should flow.
Switching on the
hydraulics
The hydraulics can now be switched on. Since the module is not yet generating a
signal the drive should be at a standstill or drift slightly (leave its position at a slow
speed).
Activating ENABLE CAUTION! The drive can now leave its position and move to an end position at
full speed. Take safety measures to prevent personal injury and damage.
Setpoint selection Now select from one of the inputs as a setpoint.
Optimize controller Now optimize the controller parameters according to your application and your
requirements.
Page 11 of 34 DSG-111*-*1121 23.04.2012

4 Technical description
4.1 Input and output signals
Connection Supply
W.E.ST. Elektronik GmbH
PIN 3 Power supply (see technical data)
PIN 4 0 V (GND) connection.
Connection Analogue signals
PIN 9/10 Analougue demand value (V), range 0… 100 % corresponds to 0… 10 V
PIN 15/16 A Version: Differential output (U) ± 100 % corresponds to ± 10 V (0… 10 V at PIN 15 and
PIN 16).
I Version: ± 100 % corresponds to 4… 20 mA (PIN 15 to PIN 12).
12 mA is the neutral position (0 % output signal).
< 4 mA indicates that there is an error and the module has not been enabled. It must be
ensured that the valve switches off at < 4 mA.
Connection Digital inputs and outputs
PIN 8 Enable input:
This digital input signal initializes the application and error messages are deleted. The
controller and the READY signal are activated. The output signal to the control element is
enabled.
The actual position is accepted as the command position and the drive remains stationary
under control at this position. If the input is disabled, the output (control signal) is switched
off(disabled). Take care off the EOUT-command!
PIN 7 S-VALID input:
The selected value (S1, S2, S4 and S8) will be activated by a signal change from low to
high (DSEL = OFF).
PIN 5
PIN6
PIN13
PIN14
Switching input:
Binary selection of one of the 16 references. For direct selection of four set points
can be parameterized as follows:
PIN 5 = S:1 / RA:1
PIN 6 = S:2 / RA:2
PIN 14 = S:14 / RA:14
PIN 13 = S:13 / RA:13
PIN 1 READY output:
ON: The module is enabled; there are no discernable errors.
OFF: Enable (PIN 8) is disabled or an error (sensor or internal error) has been detected.
Page 12 of 34 DSG-111*-*1121 23.04.2012

4.2 LED definitions
W.E.ST. Elektronik GmbH
LEDs Description of the LED function
GREEN Identical to the READY output.
OFF: no power supply or ENABLE is not activated
YELLOW No function
ON: System is ready for operation
Flashing: Error discovered.
Only active when SENS = ON.
Page 13 of 34 DSG-111*-*1121 23.04.2012

4.3 Block diagram
DSG-111A/I
Internal Power
3
24 V
24 V
PELV
0 V
DC
4
DC
0 V
Differential
Input
W.E.ST. Elektronik GmbH
Output Adaptation
Link MF
15
Output: A (0..10)V
Ramps
Input Selektor
w
u
9
10
Setpoint
-10..10V
16
Commands:
- MIN:A and :B
- MAX:A and :B
- TRIGGER
- POL
Commands:
ADD, SUB,
MUL, DIV,
MIN, MAX,
X, W
w
rw:i x
i = 4
x = 0..60000 ms
Commando:
AIN:W
0 V
Output: B (0..10)V
11
11
I-Version 4... 20 mA
PIN 15 = +
PIN 11 = GND
5
Sel 1
24 V in
Page 14 of 34 DSG-111*-*1121 23.04.2012
Command values
Ramps
6
Sel 2
ra:i x
i = 1 | 2 | 3 | 4
oder
i = 0..15 (sel x)
x = 0..60000 ms
24 V in
x
s:i x
i = 0..15
x = -10000..10000
14
12
Sel 4
24 V in
10 V Reference
13
Sel 8
24 V in
1
Ready
24 V out
Control program
7
S-Valid
24 V in
Commands:
- LG
- MODE (Expert or Standard)
- DSEL
- EOUT (Error Mode)
- RMODE
PE via DIN-RAIL
RS232 C
9600 Baud
1 Stopbit
no parity
8
Enable
24 V in
3,5 mm JISC-6560 Jacket

4.4 Typical cabling
4.5 Connection examples
Joystick
10V PIN 12
+In PIN 9
-In PIN 10
GND PIN 11
SPS / PLC 0... 10 V / +/- 10 V
+In PIN 9
-In PIN 10
Valve (6 + PE plug) with OBE electronics
Module
Analogue CMD
(-10V..10V)
PIN 12
PIN 15
PIN 16
24V switching outputs
Status
Ready
24V switching inputs
Enable
Valid
S 2
S 1
24V switching inputs
S 8
S 4
A : 24 V supply
B : 0 V supply
C : GND or enable
W.E.ST. Elektronik GmbH
AIN:W 2000 1000 5000 V (für +/- 100%)
AIN:W 1000 1000 0 V (für +/-100%)
D : + differential input
E : - differential input
F : diagnostics
PE -
Screen
PE Klemme
1
5
9
13
2
6
10
14
3
7
11
0V
15
4
8
12
16
PE Klemme
Power supply
Potentiometer / Joystick
10V PIN 12
+In PIN 9
-In PIN 10
GND PIN 11
AIN:W 1000 1000 0 V (für 0... 100%)
AIN:W 2000 1000 5000 V (für +/-100%)
Page 15 of 34 DSG-111*-*1121 23.04.2012
Screen
24V
0V
PIN 12 = 10 V Reference output
Proportional valve
Differantial input should be used

4.6 Technical Data
Power supply
Current consumption
External fuse
Digital inputs
Input resistance
W.E.ST. Elektronik GmbH
[VDC]
[mA]
Page 16 of 34 DSG-111*-*1121 23.04.2012
[A]
[V]
[V]
[kOhm]
Digital outputs [V]
[V]
Analogue inputs (sensor and command signals)
Resolution
Speed input
Analogue outputs
Voltage
Signal Resolution
Current
Signal resolution
[V]
[mA]
[%]
[V]
[%]
[V]
[mA]
[%]
[mA]
[%]
Controller Sample time [ms] 1
Serial Interface
12… 30 (incl. ripple)
10
25
logic 0: < 2 V
logic 1: > 12 V (50 mA)
0...10; 25 kOhm
4...20; 250 Ohm
0,01 (internally 0,0031) incl. Oversampling
0...10; 90 kOhm
0,01
2 x 0...10 (differential output)
5 (max. load)
0,024
4...20 mA (I version); 390 Ohm max. load
0,024
RS 232C, 9600 … 57600 Baud, 1 stopbit,
no parity, Echo Mode
Housing Snap-On Module EN 50022
Polyamide PA 6.6
Weight [kg] 0,170
Protection class
Temperature range
Storage temperature
Humidity
[°C]
[°C]
[%]
Combustibility class V0 (UL94)
IP20
-20… 60
-20… 70

5 Parameters
5.1 Parameter overview
W.E.ST. Elektronik GmbH
Command Default Unit Description
LG GB - Changing language help texts.
MODE STD - Mode parameter.
DSEL OFF - Selection of the use of the S-VALID input. If DSEL = ON the
inputs SEL x will be directly used. In OFF mode, a positive signal
change will activate the SEL x inputs.
RMODE SD - Selection of the ramp function. 4Q is the four-quadrant-ramp,
SD is the command value related ramp and SDR is a jerk reduced
command value related ramp (only up to 5000 ms and
DSEL OFF mode)
MF X - Selection of the linking functions between w and x. See block
diagram.
EOUT 0 0,01 % Error output signal.
POL + - Reversal of output polarity.
SENS AUTO - Activation and disabling of internal monitoring functions.
AIN:W
A: 1000
B: 1000
C: 0
X: V
-
-
0,01 %
-
Analogue input scaling for W
RW:1… 4 100 ms Ramp times for the Four-Quadrant-Ramp
S0:0… 15 0 0,01 % Programmable demand values, selectable with the digital inputs
RA:0… 15 100 ms Programmable ramp times
MIN:A
MIN:B
MAX:A
MAX:B
0
0
10000
10000
0,01 %
0,01 %
0,01 %
0,01 %
Zero point setting /following error compensation.
Maximum output signal limitation.
TRIGGER 200 0,01 % Trigger threshold for activating the following error compensation
(MIN).
Page 17 of 34 DSG-111*-*1121 23.04.2012

5.2 Parameter description
W.E.ST. Elektronik GmbH
5.2.1 LG (Changing the language for the help texts)
Command Parameters Unit Group
LG x x= DE|GB - STD
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 Parameters Unit Group
MODE x x= STD|EXP - STD
This command changes the operating mode. Various commands (defined via STD/EXP) are blanked out
in Standard Mode. The commands in Expert Mode have a more significant influence on system behavior
and should accordingly be changed with care.
5.2.3 DSEL (Deactivating S-Valid Input)
Command Parameters Unit Group
DSEL x X= ON|OFF - EXP
The command value activation will be switched over with the DSEL command.
DSEL= OFF: A new command value (Bit combination via S* inputs) will be active after a signal change
(low to high) at input S-VALID.
DSEL= ON: A new command value is immediately active.
Page 18 of 34 DSG-111*-*1121 23.04.2012

5.2.4 RMODE (ramp function)
W.E.ST. Elektronik GmbH
Command Parameters Unit Group
RMODE X X= 4Q|SD|SDR - EXP
Definition of the generated ramp function.
RMODE= 4Q: A four-quadrant ramp is active. The related quadrant (RA:1 = ramp up at extending,
RA:2 = ramp down at extending, RA:3 = ramp up at retracting and RA:2 = ramp down at
retracting) is defined by the RA:1… RA:4.
RMODE= SD: Command signal related ramp time. Depending on the input combination one of the 16
ramp times is selected.
RMODE= SDR: Jerk limited ramp time (see SD). This ramp function is used for smooth acceleration and
deceleration of hydraulic axis. The max ramp time is limited by 5 s. This function can not
be used with DESEL = ON.
5.2.5 MF (linking of the external and internal command values)
Command Parameters Unit Group
MF X X= W|X|ADD|SUB
MUL|DIV|MIN|MAX
Via the linking of the analogue input (W) and the programmed command values (X) different calculations
are possible.
W: the analogue input is only used (W).
X: the programmed input is only used (X).
ADD: both values are added (W + X).
SUB: both values are subtracted (X - W).
MUL: both values are multiplied (W * X).
DIV: X is divided by W (X / W)
MAX: the higher value is taken over
MIN: the lower value is taken over
Page 19 of 34 DSG-111*-*1121 23.04.2012
STD

W.E.ST. Elektronik GmbH
5.2.6 EOUT (Output signal: READY = OFF)
Command Parameters Unit Group
EOUT X x= -10000… 10000 0,01 % EXP
Output value in case of a detected error or a deactive ENABLE input. A value (degree of valve opening)
for use in the event of a sensor error (or the module is disabled) can be defined here. This function can
be used if, for example, the drive is to move to one of the two end positions (at the specified speed) in
case of a sensor error.
|EOUT| = 0 The output is switched off in the event of an error. This is normal behavior.
CAUTION! If the output signal is 4… 20 mA, the output is switched off when |EOUT| = 0. If a
null value = 12 mA is to be output in the event of an error, EOUT must be set to 1 2 .
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.
5.2.7 POL (output polarity)
Command Parameter Unit Group
POL X x= +|- - STD
The output polarity of the controller can be switched over.
5.2.8 SENS (sensor monitoring)
Command Parameter Unit Group
SENS X X = ON|OFF|AUTO - STD
This command is used to activate/deactivate the monitoring functions (4… 20 mA sensors, output current,
signal range and internal failures) of the module.
OFF: No monitoring function is active.
ON: All monitoring functions are active. Detected failures can be reset by deactivating the ENABLE
input.
AUTO: Auto reset mode. All monitoring functions are active. If the failure doesn’t exist anymore, the
module automatically resumes to work.
Normally the monitoring functions are always active(ON or AUTO mode) because otherwise no
errors are detectable via the READY output. Deactivating is possible mainly for troubleshooting
2 This is necessary if using valves without error detection for signals lower than 4 mA.
Page 20 of 34 DSG-111*-*1121 23.04.2012

W.E.ST. Elektronik GmbH
5.2.9 AIN (Analogue input scaling)
Command Parameters Unit Group
AIN:I A B C X a= -10000… 10000
b= -10000… 10000
c= -500… 10000
x= V|C
-
-
0.01%
-
This command can be used to scale the individual inputs. The following linear equation is used for
scaling.
a
Output ( Input c)
b
The ”c” value is the offset (e. g. to compensate the 4 mA in case of a 4… 20 mA input). The variables ”a”
and ”b” define the gain factor.
e.g.: 2.345 correspond to: a = 2345, b =1000
The internal measuring resistor for measuring the current (4… 20 mA) is activated via the x value and the
evaluation switched over accordingly.
Typical settings:
Command Input Description
AIN:W 1000 1000 0 V 0… 10 V Range: 0… 100 %
AIN:W 10 8 1000 V OR
AIN:W 1000 800 1000 V
AIN:W 10 4 500 V OR
AIN:W 1000 400 500 V
Page 21 of 34 DSG-111*-*1121 23.04.2012
STD
1… 9 V Range: 0… 100 %; 1 V = 1000 used for the offset and gained by 10
/ 8 (10 V divided by 8 V (9 V -1 V))
0,5… 4,5 V Range: 0… 100 %; 0,5 V = 500 used for the offset and gained by
10 / 4 (10 V divided by 4 V (4,5 V -0,5 V))
5.2.10 RW (Four-Quadrant-Ramp for the analogue input)
Command Parameter Unit Group
RW:I X I= 1… 4
X= 1… 60000
This parameter is used to set the four-quadrant ramp for analog input signal W at Pin 9/10.
-
ms
STD

W.E.ST. Elektronik GmbH
5.2.11 S (command values of binary coded switch inputs)
Command Parameter Unit Group
S0:I X I= 0… 15
X= -10000… 10000
This parameter is entered in 0,01%.
-
0,01%
STD|EXP
Depending of the input bit combination (PIN 5, 6, 13 and 14) the programmed value is active.
In standard mode, only the values of S:0, S:1, S:2, S:4 and S:8 are displayed. These can be accessed
directly without combining the inputs of the individual pins. To see all the values the expert mode must be
selected.
5.2.12 RA (ramp times)
Command Parameter Unit Group
RA:I X I= 0… 15
X= 0… 60000
This parameter is entered in ms.
Each programmed command value can be assigned to a ramp time.
Page 22 of 34 DSG-111*-*1121 23.04.2012
-
ms
STD|EXP
In standard mode, only the values of RA:0, RA:1, RA:2, RA:4 and RA:8 are displayed. To see all the values
the expert mode must be selected.
The ramp times will be used depending on the RMODE function. In selecting the four-quadrant
ramp, the ramp RA:1... RA:4 are used for quadrant 1... 4.

W.E.ST. Elektronik GmbH
5.2.13 MIN (Deadband compensation)
5.2.14 MAX (Limitation / Gain )
5.2.15 TRIGGER (Response threshold for the MIN parameter)
Command Parameters Unit Group
MIN:I X
MAX:I X
TRIGGER X
i= A|B
x= 0… 6000
x= 3000… 10000
x= 0… 4000
-
0,01 %
0,01 %
0,01 %
The output signal to the valve is adjusted by these commands. With the MAX value the output signal (the
maximum valve current) will be defined. With the MIN value the overlap (dead band of the valve) will be
compensated. Via the TRIGGER the activation point of the MIN function is set and so a non sensitive
range around the zero-point 3 can be specified.
CAUTION: If the MIN value is set too high, it influences the minimal velocity, which cannot
be adjusted any longer. In extreme case this causes to an oscillating around the
closed loop controlled position.
MIN:B
MAX:B
Output
TRIGGER
3 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 23 of 34 DSG-111*-*1121 23.04.2012
STD
Input
MAX:A
MIN:A

W.E.ST. Elektronik GmbH
5.2.16 PROCESS DATA (Monitoring)
Command Parameters Unit
W
WR
X
XR
U
IA
IB
Demand value (input signal)
Demand value (according to the profile generator)
Actual internal value
Actual value (according to the profile generator)
Actuator signal
Solenoid current A
Solenoid current B
Page 24 of 34 DSG-111*-*1121 23.04.2012
%
%
%
%
%
mA (P Version only)
mA (P Version only)
The process data are the variables which can be observed continuously on the monitor or on the
oscilloscope.

6 Appendix
6.1 Failure monitoring
W.E.ST. Elektronik GmbH
Following possible error sources are monitored continuously:
Source Fault Characteristic
EEPROM
(at switching on)
P-VERSION
Solenoid A on PIN 3/4
Solenoid B on PIN 1/2
Data error The output is deactivated.
The module can be activated by
saving new parameters (pressing of
the SAVE Button).
Wrong cabling, broken wire. The power stage gets deactivated.
CAUTION: Take care of the EOUT command. Changes will influense the behaviour.
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 in monitor mode can be used to analyze faults.
CAUTION: All safety aspects must be thoroughly checked when working with the RC
(Remote Control) mode. In this mode the module is controlled directly and the machine
control cannot influence the module.
FAULT CAUSE / SOLUTION
ENABLE is active, the
module does not respond,
and the READY LED is off.
ENABLE is active, the
READY LED is flashing.
ENABLE is active; the
READY LED is on, the
system moves to an end
position.
There is presumably no power supply or the ENABLE signal (PIN 8) is not present.
If there is no power supply there is also no communication via our operating
program. If a connection has been made to the WPC-300, then a power supply is
also available.
The flashing READY LED signals that a fault is been detected by the module. The
fault could be:
A broken cable or no signal at the input (PIN 10/9 or PIN 14/13), if 4… 20 mA signals
are parameterized.
A broken cable or incorrect cabling to the solenoids (in the P version only).
Internal data error: press the command/SAVE button to delete the data
error. The system reloads the DEFAULT data.
With the WPC-300 operating program the fault can be localized directly via the
monitor.
The control circuit polarity is incorrect. The polarity can be changed with the POL
command or by reversing the connections to PIN 15 and PIN 16.
Page 25 of 34 DSG-111*-*1121 23.04.2012

W.E.ST. Elektronik GmbH
6.3 Description of the command structure
The command structure:
[nnnn:i x] or
[nnnn x]
Meaning:
nnnn - used for an arbitrary command name
nnnn: - used for an arbitrary command name, expandable by an index.
i oder I - a dummy is for the index. E. g. an index can be „A“ or „B“, depending on the direction.
x - parameter value, in case of special commands more than one parameter are possible.
Examples:
MIN:A 2000 nnnn = “MIN”, i = “A” and x = “2000”
OFFSET 50 nnnn = „OFFSET“ and x = „50“
C:IC 2000 nnnn = “C”, i = “IC” and x = “2000”
Page 26 of 34 DSG-111*-*1121 23.04.2012

W.E.ST. Elektronik GmbH
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. The cycle time for the controller is
0,167 ms.
The output stage can be ideally adjusted to dynamic requirements via internal parameters.
Valve technology: Directional, throttle, pressure and flow control valves manufactured by REXROTH,
BOSCH, DENISON, EATON, PARKER, FLUID TEAM, ATOS and others.
Features
Two power output stages for 1A, 1,6A und 2,6A
Hardware short-circuit protection with 3 µs response time
Adjustable PWM frequency, dither frequency and dither amplitude
High current signal resolution
Separate power supply for safety-relevant applications
Integrated into the standard controller, no additional cabling necessary
Optimum price/performance ratio
Page 27 of 34 DSG-111*-*1121 23.04.2012

7.2 Device description
99,0000 mm
Made in Germany
Date: Add.:
ID:
V:
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. Elektronik GmbH
LEDs
RS232C
Interface
13 14 15 16
13 14 15 16
1 2 3 4
5 6 7 8
W.E.ST.
Ready
Status
9 10 11 12
25 26 27 28
29 30 31 32
17 18 19 20
21 22 23 24
25 26 27 28
13 14 15 16 29 30 31 32
45,0000 mm
114,0000 mm
Klemmblöcke (steckbar)
Terminals (removable)
Page 28 of 34 DSG-111*-*1121 23.04.2012

7.3 Inputs and outputs
Connection Signal description
PIN 22 +
PIN 24 -
7.4 Circuit diagram
W.E.ST. Elektronik GmbH
Power supply: 10… 30 VDC: For safety-related applications, the output stage
can be deactivated thanks to the separate power supply inputs.
PIN 17+19 Solenoid current output A
PIN 18+20 Solenoid current output B
10..30V
0V
Power supply
24 V
0 V
22
24
Internal MCU
interface
Power output stage
***-***P
Page 29 of 34 DSG-111*-*1121 23.04.2012
ia
ib
17
19
18
20
17
19
20
18
Solenoid A
Solenoid B
for expample:
HAWE valves

7.5 Typical cabling
7.6 Technical data
W.E.ST. Elektronik GmbH
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
Supply voltage
Current requirement
Fuse protection
PE
Output currents (PWM
signal, current-controlled)
Max. solenoid currents
[VDC]
[A]
[A]
[A]
10... 30
Depending on the solenoid type
(max. 5 A)
5 (medium time lag)
1,0 / 1,6 / 2,6 selectable via software
Housing Snap-on module EN 50022
Polyamide PA 6.6
Temperature range [°C] -20… 60
Weight [kg] 0,250
1
5
9
13
0V
2
6
10
14
Flammability class V0 (UL94)
Connections 2 x 4-pole terminal blocks
3
7
11
15
4
8
12
16
17
21
25
29
Power supply
Page 30 of 34 DSG-111*-*1121 23.04.2012
18
22
26
30
19
23
27
31
20
24
28
32
PE
24V
0V
Solenoid A
Solenoid B

7.7 Parameters
7.7.1 Parameter overview
W.E.ST. Elektronik GmbH
Command Default Unit Description
CURRENT 0 - Switching over the output current.
DFREQ 120 Hz Dither frequency
DAMPL 500 0,01 % Dither amplitude.
PWM 2600 Hz PWM frequency
PPWM
IPWM
7
40
-
-
Current control loop PI control dynamics.
The standard parameterization has been used with a large number of proportional vales from various
manufacturers. This parameterization has proved to be good as long as no special demands are made of
the application.
7.8 Parameter description
7.8.1 CURRENT (Current range switchover)
Command Parameters Unit Group
CURRENT X x= 0, 1 und 2 - STD
The nominal current range is set with this parameter. Dither and also MIN/MAX always refer to the
selected current range.
0 = 1,0 A range, 1 = 1,6 A range and 2 = 2,6 A range.
7.8.2 DFREQ (Dither frequency)
7.8.3 DAMPL (Dither amplitude)
Command Parameters Unit Group
DFREQ X x= 60… 400 Hz STD
DAMPL X x= 0… 3000 0,01 % STD
The dither can be defined with this command. Different amplitudes or frequencies may be required
depending on the valve.
CAUTION: The PPWM and IPWM parameters influence the effect of the dither setting. These
parameters should not be altered again after the dither has been optimized.
CAUTION: If the PWM frequency is less than 500 Hz the dither amplitude DAMPL should be set
to zero.
Page 31 of 34 DSG-111*-*1121 23.04.2012

7.8.4 PWM (PWM frequency)
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Command Parameters Unit Group
PWM X x= 100… 2600 Hz STD
This parameter is entered in Hz. The optimum frequency depends on the valve.
CAUTION: the PPWM and PPWM parameters should be adjusted with low PWM frequencies.
The PWM frequency can only be set in defined steps. This means that there are deviations
between the specified and the actual frequency. The next highest frequency step is always
used.
7.8.5 PPWM (Solenoid current controller P element)
7.8.6 IPWM (Solenoid current controller I element)
Command Parameters Unit Group
PPWM X
IPWM X
x= 0… 30
x= 4… 100
The PI current controllers for the solenoids are parameterized with these commands 4 .
Page 32 of 34 DSG-111*-*1121 23.04.2012
-
-
CAUTION: These parameters should not be changed without appropriate measurement
capabilities and experience.
If the PWM frequency is > 2500 Hz, the dynamic response of the current controller can be increased.
Typical values are: PPWM = 7… 15 and IPWM = 20… 40.
If the PWM frequency is < 250 Hz, the dynamic response of the current controller must be reduced.
Typical values are: PPWM = 1… 3 and IPWM = 40… 80.
4 CAUTION! This setting is dependent on the dynamic response of the solenoid (inductance).
EXP

8 Notes
W.E.ST. Elektronik GmbH
Page 33 of 34 DSG-111*-*1121 23.04.2012