W.E.S.T. Elektronik POS-124-A-PDP Guide

W.E.ST. Elektronik GmbH
Technical Documentation
POS-124-A-PDP
POS-124-I-PDP
Two axes positioning and synchronisation control module with
integrated profibus interface and SSI sensor interface

W.E.ST. Elektronik GmbH
Page 2 of 45 POS-124-*-PDP-1121 13.02.2013
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 .......................................................................................................................................... 12
4 Technical description......................................................................................................................................... 13
4.1 Input and output signals............................................................................................................................. 13
4.2 LED definitions........................................................................................................................................... 14
4.3 Circuit diagram........................................................................................................................................... 15
4.4 Typical cabling........................................................................................................................................... 16
4.5 Connection examples ................................................................................................................................ 16
4.6 Technical data ........................................................................................................................................... 17
5 Parameters ........................................................................................................................................................ 18
5.1 Parameter overview................................................................................................................................... 18
5.2 Parameter description................................................................................................................................ 20
5.2.1 LG (Changing the language for the help texts) ................................................................................. 20
5.2.2 PDPADR (Profibus adress)............................................................................................................... 20
5.2.3 MODE (Switching between parameter groups)................................................................................. 20
5.2.4 SENS (Module monitoring) ............................................................................................................... 21
5.2.5 STROKE1 /STROKE2 (Full stroke)................................................................................................... 21
5.2.6 VRAMP1 /VRAMP2 (Ramp time for external speed demand) .......................................................... 21
5.2.7 VMODE1 / VMODE2 (Switching over the control mode)................................................................... 22
5.2.8 VMAX1 / VMAX2 (Maximum speed in NC Mode) ............................................................................. 22
5.2.9 POL1 / POL2 (Output polarity).......................................................................................................... 23
5.2.10 EOUT1 / EOUT2 (Output signal in case of error).............................................................................. 23
5.2.11 INPX (Sensor type define) ................................................................................................................ 24
5.2.12 SSI:OFFSET (Sensor offset)............................................................................................................. 24
5.2.13 SSI:POL (Direction of the sensor signal)........................................................................................... 24
5.2.14 SSI:RES (Signal resolution).............................................................................................................. 25
5.2.15 SSI:BITS (Number of bits)................................................................................................................. 25
5.2.16 SSI:CODE (Signal coding)................................................................................................................ 25
5.2.17 AIN (Analogue input scaling)............................................................................................................. 26
5.2.18 A1 / A2 (Acceleration time) ............................................................................................................... 27
5.2.19 D1 / D2 (Deceleration / braking distance) ......................................................................................... 27
5.2.20 V
0
1 / V
0
2 (Loop gain setting)............................................................................................................. 28
5.2.21 CTRL1 / CTRL2 (Deceleration function characteristic) ..................................................................... 29
5.2.22 GL: P (gain of the synchronization in SDD mode)............................................................................. 30
5.2.23 GL: V0 (gain of the synchronization in NC mode)............................................................................. 30
5.2.24 GL:T1 (Time constant of the synchronisation control)....................................................................... 30
5.2.25 GL:E (Window for the synchronization error) .................................................................................... 30

W.E.ST. Elektronik GmbH
Page 3 of 45 POS-124-*-PDP-1121 13.02.2013
5.2.26 HAND1 / HAND2 (Manual speed) ..................................................................................................... 31
5.2.27 MIN / MIN2 (Overlap compensation)................................................................................................. 32
5.2.28 MAX1 / MAX2 (Limitation) ................................................................................................................. 32
5.2.29 TRIGGER (Response threshold for the MIN parameter)................................................................... 32
5.2.30 OFFSET1 / OFFSET2 (Zero correction)............................................................................................ 33
5.2.31 INPOS:S1 / INPOS:S2 (In position window)...................................................................................... 33
5.2.32 INPOS:D1 / INPOS:D2 (following error window) ............................................................................... 33
5.2.33 PROCESS DATA (Monitoring) .......................................................................................................... 34
6 Appendix............................................................................................................................................................ 35
6.1 Failure monitoring ...................................................................................................................................... 35
6.2 Troubleshooting ......................................................................................................................................... 35
6.3 Description of the command structure........................................................................................................ 37
7 Profibus DP interface ......................................................................................................................................... 38
7.1 Profibus functions....................................................................................................................................... 38
7.2 Installation.................................................................................................................................................. 38
7.3 GSD Configuration File .............................................................................................................................. 38
7.4 Description Profibus DP interface .............................................................................................................. 39
7.5 Commands via PROFIBUS........................................................................................................................ 40
7.5.1 Command map.................................................................................................................................. 40
7.5.2 Definition of the control bits: .............................................................................................................. 41
7.6 DATA send to PROFIBUS ......................................................................................................................... 42
7.6.1 Feedback map................................................................................................................................... 42
7.6.2 Definition of the status bits: ............................................................................................................... 43
8 Notes.................................................................................................................................................................. 44

W.E.ST. Elektronik GmbH
Page 4 of 45 POS-124-*-PDP-1121 13.02.2013
1 General Information
1.1 Order number
POS-124-A-PDP-1121
1
triple stage module with digital SSI-interface with analogue ±10 V
differential output, housing width 67,5 mm
POS-124-I-PDP-1121 triple stage module with digital SSI-interface with analogue 4… 20 mA
output, housing width 67,5 mm
Alternative products:
POS-124-A-PDP-S1-1121 double stage module without digital SSI-interface with analogue ±10 V
differential output, 45 mm housing width
POS-124-I-PDP-S1-1121 double stage module without digital SSI-interface with analogue
4… 20 mA output, 45 mm housing width
1.2 Scope of supply
The scope of supply includes the module including the terminal blocks which are a part of the housing.
The Profibus plug, interface cables and further parts which may be required should be ordered separate-
ly. This documentation can be downloaded as a PDF file from www.w-e-st.de.
1.3 Accessories
RS232-SO - Programming cable with RS232 interface
USB-SO - Programming cable with USB interface
WPC-300 - Start-Up-Tool (download: www.w-e-st.de/produkte/software)
PDP-Plug - Profibus connector with switchable terminating resistors
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.

W.E.ST. Elektronik GmbH
Page 5 of 45 POS-124-*-PDP-1121 13.02.2013
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]
Homepage: www.w-e-st.de or www.west-electronics.com
EMAIL: [email protected]e
Date: 13.02.2013
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 in-
ferred from this document. We reserve the right to make technical modifications due to further develop-
ment 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 copyright.

W.E.ST. Elektronik GmbH
Page 6 of 45 POS-124-*-PDP-1121 13.02.2013
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 pro-
tection) must be complied with.
These modules are designed for hydraulic applications in open or closed-loop control cir-
cuits. 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 elec-
tronics must only be carried out whilst the equipment is switched off and not under pres-
sure.
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 commis-
sioning instructions must be followed. Guarantee and liability claims are invalid if the in-
structions 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, con-
tamination 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.

W.E.ST. Elektronik GmbH
Page 7 of 45 POS-124-*-PDP-1121 13.02.2013
2 Characteristics
This electronic module has been developed for controlling hydraulic positioning drives.
Both axes are controlled complete autonomous via the Profibus. Optionally an interconnection to a two
axes synchronised system is intended.
The differential outputs are covered for activation of constant valves with integrated or external
electronics (differential input). Intended is this module for the connection of analogue way sensors 0...10V
or 4...20mA (scalable) or digital SSI sensor interfaces.
The internal control signals operating states and error conditions via Profibus to the higher-level control.
The operation is signaled by a switch output.
Typical applications: Positioning control or synchronization control with hydraulic axes.
Features
•Two independent positioning axes
•Can be combined for synchronization controls
•Command position parameter, actual value response, on loop control byte and status byte via
fieldbus Profibus DP
•Principle of stroke-dependent deceleration for the shortest positioning time or NC profile gen-
erator for constant speed
•Analogue or digital (SSI) actual value registration for both axes
•Superimposed synchronization controller as PT1 actuator
•Usable with zero lapped control valves
•Fault diagnosis and extended function checking
•Simplified parameterization with WPC-300 software version 3.2

W.E.ST. Elektronik GmbH
Page 8 of 45 POS-124-*-PDP-1121 13.02.2013
2.1 Device description
D-inputs
D-outputs
Enable
24 V
0 V
Ready
V:
ID:
Analogue
GND
GND
Pos. 1
Pos. 2
B
A
Differential
output
Add.:Date:
Made in Germany
W.E.ST.
Ready
Status
1234
5678
9 10 11 12
14 15 1613
D-41372 Niederkrüchten
Homepage: http://www.w-e-st.de
W.E.ST. Elektronik
8
7
6
5
4
3
2
1
16
15
14
13
12
11
10
9
30 31 3229
26 27 2825
18 19 2017
22 23 2421
Profibus 9pol SUBD
Online
46 47 4845
42 43 4441
34 35 3633
38 39 4037
Klemmblöcke (steckbar)
Terminals (removable)
LEDs
RS232
Interface
Typenschild und Anschlussbelegung
Type plate and terminal pin assignment
67,5000 mm
99,0000 mm
114,0000 mm
PROFIBUS Buchse
PROFIBUS connector
121,0000 mm

W.E.ST. Elektronik GmbH
Page 9 of 45 POS-124-*-PDP-1121 13.02.2013
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 a requirement
that no strong electro-magnetic interference sources are installed nearby when using our control
and regulation modules.
•Typical installation location: 24V control signal area (close to PLC)
The devices must be arranged in the control cabinet so that the power section and the signal sec-
tion are separate from each other.
Experience shows that the installation space close to the PLC (24 V area) is most suitable. All
digital and analogue inputs and outputs are fitted with filters and surge protection 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- connected
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 shielded.
•All other cables must be screened if there are powerful interference sources (frequen-
cy 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 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.
•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 in-
terference 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 connected to the same power
supply) must always be provided with appropriate overvoltage protection directly at the coil.

W.E.ST. Elektronik GmbH
Page 10 of 45 POS-124-*-PDP-1121 13.02.2013
3.2 Typical system structure
This minimal system consists of the following components:
(*1) proportional valve
(*2) hydraulic cylinder
(*3) position sensor
(*4) POS-124-PDP control module
(*5) interface to PLC with analogue and digital signals
3.3 Method of operation
This control module supports simple point-to-point positioning with hydraulic drives. The system works
based on the principle of stroke-dependent deceleration, i.e. the control gain (deceleration stroke) is set
via parameters D:A and D:B. Alternatively the loop gain will be used in NC mode.
The deceleration characteristics can be set linearly (LIN) or approximately quadratically (SQRT1) via the
CTRL parameter. For normal proportional valves SQRT1 is the input setting.
For control valves with a linear flow curve it depends on the application. If LIN is selected for these valves
a significantly shorter deceleration distance can often be set (D:A and D:B).

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Positioning sequence:
The positioning is controlled via Profibus. After releasing (ENABLE input), the command
position is set to the actual position of the sensor and the axis stays in closed loop position control
mode. The READY output indicates that the system is generally ready for operation. When setting the
START-signal, the preset command value will be taken over. The axis immediately will drive to this new
command position and indicates reaching it by setting the InPos output.
The InPos output stays active as long as the axis is within the preset InPos window and the START input
is active. The driving velocity is forced by preset parameter, too.
The axis can be driven in manual mode (START is off) using the control bits HAND+ or HAND-. The
velocity is programmable. When the HAND signal is deactivated, the command position is set to the actu-
al position and the system stays in closed loop position control mode.
Setting the synchronous bit (GL) will synchronize both axes and the synchronization controller is overrid-
ing the position controller of axis 2. Axis 2 is now following axis 1 according to the master-slave-principle.
Influences on positioning accuracy:
The positioning accuracy is determined by the hydraulic and mechanical conditions. The right choice of
valve is therefore a decisive factor. In addition, two mutually contradictory requirements (short position
time and high accuracy) must be taken into account when designing the system.
The electronic limitations lie mainly in the resolution of the analogue signals, although with our modules a
resolution of < 0.01% only needs to be considered with long positions. In addition, the linearity of the indi-
vidual signal points (PLC, sensor and control module) must be considered. The worst-case scenario is
that a system-specific absolute fault occurs.
The repeat accuracy is, however, not affected by this.
V+
V+
A:A D:A
A:B
D:B
MAX:A
MAX:B
driving out
volumetric flow P-A and B-T
control direction
control direction
driving in

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3.4 Commissioning
Step Task
Installation
Install the device in accordance with the circuit diagram. Ensure it is wired correct-
ly 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 se-
rial 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-parameterisation
Now set up the following parameters (with reference to the system design and cir-
cuit diagrams):
The STROKE, POSITION, SENSOR SETTING, POLARITY, ACCELERATION
and DECELERATION.
Pre-parameterisation is necessary to minimise the risk of uncontrolled move-
ments.
Parameterise specific settings for the control element (MIN for following error
compensation and MAX for maximum velocity).
Reduce the speed limitation to a value which is uncritical for the application.
Control signals
Check the control signal with a voltmeter. The control signals (PIN 15 to PIN16
and PIN19 to PIN20) lies in the range of ± 10V. In the current state it should be
0V. Alternatively, if current signals are used, approx. 0 mA should flow.
CAUTION! This signal depends on the EOUT setting.
Profibus communication
Activate the profibus communication and check whether the right values and bits
are send to the module.
Switching on the hydrau-
lics
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.
The drive is in the current position (with ENABLE the actual position is accepted
as the required position). Should the drive move to an end position the polarity is
probably wrong.
Activating START
With the start signal the demand value on the analogue demand value input is ac-
cepted and the axis moves to the predefined target position.
If START is disabled the axis stops in the preset deceleration distance D:S.
Manual (HAND) operation
If START is disabled the axis can be moved manually with HAND+ or HAND- .
After disabling the HAND signal, the axis stops in a controlled manner at the cur-
rent position.
Optimise controller
Now optimise the controller parameters according to your application and your
requirements.

W.E.ST. Elektronik GmbH
Page 13 of 45 POS-124-*-PDP-1121 13.02.2013
4 Technical description
4.1 Input and output signals
Connection Supply
PIN 3, PIN 31
and PIN 35
Power supply (see technical data)
PIN 4, PIN 32
and PIN 36
0 V (GND) connection.
Caution, PIN 4 is connected internally to PIN 11 (and also possibly to PIN 12 depending on
the model). These connections serve as a reference potential for the analogue sensor or
demand value signals.
Connection Analogue signals
PIN 13
Analogue position actual value (X1), range 0… 100% corresponds to 0… 10V or 4… 20 mA
PIN 14
Analogue position actual value (X2), range 0… 100% corresponds to 0… 10V or 4… 20 mA
PIN 15 / 16
Analogue differential output for activation of the axis 1:
-100...100% corresponds to -10...10V.
PIN 19 / 20
Analogue differential output for activation of the axis 2:
-100...100% corresponds to -10...10V.
Connection SSI sensors
PIN 37-40
PIN 33, 34
Interface 1 to the SSI sensor. RS422 interface and power supply
PIN 41-44
PIN 47, 48
Interface 2 to the SSI sensor. RS422 interface and power supply
Connection Digital inputs and outputs
PIN 8
Enable input:
This digital input signal initializes the application. The signal will be approved in connection
with the software enable the corresponding axis.
PIN 2
Synchronous error output (only active in synchronous mode):
ON: Slave axis within the error window (GL:E)
OFF: Slave axis outside the error window (GL:E)
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.

W.E.ST. Elektronik GmbH
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4.2 LED definitions
LEDs Description of the LED function
GREEN
Identical to the READY output.
OFF: no power supply or ENABLE is not activated
ON: System is ready for operation
Flashing: Error discovered (valve solenoid or 4… 20 mA).
The error of one axis results to a flashing LED.
YELLOW
Only active in synchronous mode:
OFF: Slave axis outside the error window
ON: Slave axis within the error window
GREEN
(right side)
Profibus connection.
OFF: No Profibus communication
ON: Profibus communication in prozess

W.E.ST. Elektronik GmbH
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4.3 Circuit diagram
x2
POS-124-A/I-PDP
24 V
PE via DIN-RAIL
15
16
12
1
2
Output: A
Output: B
8
Ready
Enable
24 V output
24 V output
3,5 mm JISC-6560 Buchse
Differentialinput
13
0 V
11
ANA Feedback
Position 1
Output Adaptation
24 V input
ws1
x1
u1
Internal Power
3
4 0 V
Position
via Feldbus
Control program
v1
RS232 C
9600 Baud
1 Stopbit
no parity
I-Version: 4... 20 mA
PIN 15 = +, PIN 12 = GND
Profil Generator
Commands:
- STROKE
VMODE = NC
Input Scaling
Commands:
AIN:W
0..10V
4..20mA
0 V
Control Function
Commands:
- A:A and A:B
- D:A and D:B
Commands:
- MIN: A and B
- MAX: A and B
- TRIGGER
- OFFSET
- POL
VMODE = SDD
Output limitation
DC
DC
24 V
0 V
PELV
-
xd1w1
VMODE = SDD
Speed
Commands:
- TS (sample time)
- MODE (Expert or Standard)
- EOUT (Error Mode)
- INPOS (InPos output)
35
32
Profibus
SUBD
9polig
9
Profibus DP
14
0 V
11
ANA Feedback
Position 2
Input Scaling
Commands:
AIN:W
0..10V
4..20mA
0 V
19
20
18
Output: A
Output: B
Differentialinput
AXIS 1
AXIS 2
u2
I Version: 4... 20 mA
PIN 19 = +, PIN 18 = GND
36
31
SSI Sensor
Commands:
SSI:RES
SSI:BITS
SSI:CODE
SSI:POL2
SSI:OFFSET2
47
48
41
42
43
44
24 V
0 V
CLK+
CLK-
DATA+
DATA-
INPX = SSI
SSI Feedback
Position 2
Speed
via Feldbus
Synchron
Error
SSI Sensor
Commands:
SSI:RES
SSI:BITS
SSI:CODE
SSI:POL1
SSI:OFFSET1
33
34
37
38
39
40
24 V
0 V
CLK+
CLK-
DATA+
DATA-
INPX = SSI
SSI Feedback
Position 1
INPX = ANA
x2
INPX = ANA
Synchronous Controller
Commands:
- GL:P
- GL:T1
- GL:E
Enable Sync.
via Feldbus
x1
x2

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4.4 Typical cabling
power
supply
24V
0V
24 232221
32313029
20191817
GND
+24 V DC
ENABLE
+/- 10 V (4...20mA)
to control valve 1
8765
16151413
1211109
4321
0..10V, 4..20mA
sensor position
13 = X1, 14 = X2
+/- 10 V (4...20mA)
to control valve 2
power supply
communication modul
Profibus 9pol Buchse
393837
48474645
44434241
36353433
CLK-
CLK+
DATA-
DATA+
GND
+24 V DC
SSI 2
sensor interface
40
SSI 1
sensor interface
CLK+
CLK-
DATA+
DATA-
+24 V DC
GND
PE
PE Klemme
4.5 Connection examples
+In PIN 13 or 14
PIN 12 (GND)
SPS / PLC 0... 10 V speed input signal
+In PIN 10
-In PIN 9
GND PIN 11
AIN:W 2000 1600 2000 C ( für 0... 100%)
SPS / PLC 0... 10 V command and feedback signal
+In PIN 13 or PIN 14
In PIN 12 (GND)
PLC or sensor with 4... 20 mA (two wire connection)
z. B. 24 V
+In PIN 13 or 14
PIN 12 (GND)
AIN:W 2000 1600 2000 C ( für 0... 100%)
PLC or sensor with 4... 20 mA (three wire connection)
z. B. 24 V
Valve (6 + PE plug) with OBE electronics
A : 24 V supply
B : 0 V supply
C : GND or enable
D : + differential input
E : - differential input
F : diagnostics
PE -
PIN 15
PIN 16
PIN 12
Module

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4.6 Technical data
Supply voltage
Current requirement
External protection
[VDC]
[mA]
[A]
24 (±10 %)
500
1 medium time lag
Digital inputs
Input resistance
[V]
[V]
[kOhm]
logic 0: < 2 V
logic 1: > 10 V,current consumption
< 0,1 mA
25
Digital outputs [V]
[V]
logic 0: < 2 V
logic 1: > 12 V; max. 10 mA
Analogue inputs (sensor and
demand value signal)
Signal resolution
[V]
[mA]
[%]
0… 10. 33 kOhm
4… 20. 250 Ohm
0.01(internally 0.0031) inc. oversampling
Analogue outputs
Voltage
Signal resolution
Current
Signal resolution
[V]
[mA]
[%]
[mA]
[%]
2 x 0… 10; Differential output
5 (max. load)
0.024
4… 20; 390 Ohm maximum load
0.024
SSI interface - RS-422 Spezifikation, 150 kBaud
Controller sample time [ms] 1
Serial interface RS 232C, 9600… 57600 Baud, 1 stop
bit, no parity, Echo Mode
Profibus DP
Baud rate
ID Number
9.6,19,2,93.75,187.5,500,1500,3000
6000, 12000 kbits/s
1810h
Housing Snap-on module to EN 50022
PA 6.6 polyamide
Flammability class V0 (UL94)
Protection class
Temperature range
Storage Temperature
Humidity
[°C]
[°C]
[%]
IP20
-10… 50
-20... 70
<95 (non-condensing)
Connections RS232: 3,5mm JISC-6560
11 x 4-pole terminal blocks
Profibus DP, D-Sub 9 pol.
PE: via the DIN mounting rail
EMC
EN 61000-6-2: 8/2002
EN 61000-6-3: 6/2005
Weight [kg] 0,375

W.E.ST. Elektronik GmbH
Page 18 of 45 POS-124-*-PDP-1121 13.02.2013
5 Parameters
5.1 Parameter overview
Command Default Unit Description
LG GB - Changing language help texts.
PDPADR 126 - Address of the unit at the Profibus.
MODE STD - Mode parameter.
SENS ON - Activation and disabling of internal failure monitor-
ing functions.
INPX SSI -
Switching between SSI and analog sensors.
STROKE1
STROKE2
X = 10...10000 mm Working stroke of the sensor.
VRAMP1
VRAMP2
100 ms Ramp function for external speed input.
VMODE1
VMODE2
SDD - Control structure for positioning process.
VMAX1
VMAX2
50 mm/s Maximum speed in NC mode.
POL1
POL2
+ - Reversal of output polarity.
EOUT1
EOUT2
0 0,01% Error output signal.
SSI:OFFSET1
SSI:OFFSET2
0 10 nm Position offset
SSI:POL1
SSI:POL2
+ - Sensor polarity
SSI:RES 500 10 nm Resolution of the sensors (the same for both)
SSI:BITS 24 - Number of transmitted bits (the same for both)
SSI:CODE GRAY - transfer Encoding (the same for both)
AIN:I
A
B
C
X
10000
10000
10000
V
-
-
0,01 %
-
Analogue input scaling for X1 and X2.
A1:I
A2:I
:A 100
:B 100
ms
Acceleration times.
D1:I
D2:I
:A 25
:B 25
:S 10
mm
mm
mm
Deceleration distance
Deceleration distance
Emergency deceleration distance
V01:I
V02:I
:A 10
:B 10
1/s
1/s
Loop gain setting.
CTRL 1
CTRL 2
sqrt1 - Specification of control characteristics.
GL:P
GL:T1
GL:E
48
80
200
0,01
ms
µm
Definition of the synchronization actuator. GL:P
adjusted the gain, GL:T1 effects a decelerated ac-
tion of the actuator (revised stability) and .GL:E for
error-window in synchronous run (out of window
GL-Error-Bit is set on the Profibus)
HAND1:I
HAND2:I
:A 3330
:B -3330 0,01%
Output signal in manual mode.

W.E.ST. Elektronik GmbH
Page 19 of 45 POS-124-*-PDP-1121 13.02.2013
MIN1:I
MIN2:I
0
0
0,01 %
0,01 %
Zero point setting /following error compensation.
MAX1:I
MAX2:I
10000
10000
0,01 %
0,01 %%
Maximum output signal limitation.
TRIGGER1
TRIGGER2
200
200
0,01 %
0,01 %%
Trigger threshold for activating the following error
compensation (MIN).
OFFSET1
OFFSET2
0
0
0,01 %
0,01 %%
Offset value (added to the output signal).Axis 1 and
axis 2 separate definable.
INPOS1:I
INPOS2:I
200
200
µm
µm
Range for InPos signal.

W.E.ST. Elektronik GmbH
Page 20 of 45 POS-124-*-PDP-1121 13.02.2013
5.2 Parameter description
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 PDPADR (Profibus adress)
Command Parameters Unit Group
PDPADR X x= 1...126 - STD
Slave address in the Profibus network.
5.2.3 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 behaviour
and should accordingly be changed with care.