Renu Electronics GWY-500 User manual

GWY-500
(Profibus Gateway)
USER’S MANUAL

COPYRIGHT NOTICE
This manual is a publication of Renu Electronics Pvt. Ltd. and is provided for use by its customers only.
The contents of the manual are copyrighted by Renu Electronics Pvt. Ltd.; reproduction in whole or in part, for use other
than in support of Renu Electronics Pvt. Ltd. equipment, is prohibited without the specific written permission of Renu
Electronics Pvt. Ltd..
SERVICE
If service is required then pack the unit in its original packaging container or, if unavailable, any suitable rigid container.
If a substitute container is used, surround the unit with shock absorbing material; damage in shipment is not covered
by the warranty. Include a letter with the unit describing the difficulty and Hardware Revision and Software Version.
Send to the following address:
Renu Electronics Pvt. Ltd.
Survey No. 2/6,
Baner Road,
Pune-411045
India
All returns will be tested to verify customer claims of noncompliance with the product warranty. Improper return
packaging, which makes verification impossible, will void the warranty. If noncompliance is verified and is not due to
customer abuse or the other exceptions described with product warranty,Renu Electronics Pvt. Ltd. will, at its option,
repair or replace the Product returned to it, freight prepaid, which fail to comply with the foregoing warranty, provided
Renu Electronics Pvt. Ltd. is notified of such noncompliance within the one-year warranty period.
ASSISTANCE
This manual is designed to provide the necessary information for trouble-free installation and operation of your new
Gateway product. However, if you need assistance, please call Renu Electronics Pvt. Ltd. at 91-20-27292840 or visit
our web site at www.renuelectronics.com
MANUAL REVISION
If you contact us in refference to this manual, please include the following document number
Name : Profibus Gateway (GWY-500-B) User’s Manual
Part Number : URML204
Document : UMAN\GWY-500-B\0106
Revision : Revision0
RevisionNumber Date Description
Preliminary 10/11/2005
Revision0 19/01/2006 GSD file location is specified.

Warranty Certificate
For New product: This product is warranted against defects in materials and workmanship for a period of 12 months
from the date of shipment to Buyer.
For Rectified Products: Any product that will be replaced will have Warranty for 6 months or upto Original Product
Warranty period whichever is greater.
The warranty is limited to repair or replacement of the defective unit at the option of the manufacturer. This warranty is
void if the product has been altered, misused, dismantled, or otherwise abused.
ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, ARE EXCLUDED, INCLUDING BUT NOT LIMITED TO THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
MAINTENANCE & SERVICE : There are no parts that can be serviced by the user. Service should be performed on a
unit substitution basis only. Do not attempt to remove, replace or service any printed circuit board, components or any
hardware/software related with display product. If problem within the display product occurs, contact the factory for
service information or repair.
NOTE : Renu Electronics Pvt. Ltd. is dedicated to providing complete customer service and customer satisfaction. If you
have any comments or criticisms about how to improve the product features/reliability, Please make a note of the
problem/improvement and notify us. We are always open to new ideas and improvements. So please let us know your
ideas and comments.
IMPORTANT
Gateway Products are intended to be Protocol Converters/Data Sharer devices
that can also take control actions on request of device being connected. It is assumed that
user is well acquainted with the PLC / Inverters / Controllers being used.
Any Mechanical or Electrical Modification to this Unit will
void all Warranties.

Contents
INTRODUCTION 1
1.1 Purposeofthis manual 2
1.2 IntroductiontoGateway 2
1.3 GWY-500-BSpecifications 4
HARDWARE 5
2.1 DimensionaldetailsAndMounting Instructions 6
2.2 CommunicationPortDetails 7
2.3 LEDStatus 10
GETTING STARTED 11
3.1 IntroductionToProfibus 12
3.1.1 ProtocolArchitecture 12
3.1.2 DeviceTypes 13
3.1.3 PROFIBUS-DPCharactristics 14
3.1.3.1 BusAccess Protocol 14
3.1.3.2 DataThroughput 15
3.1.3.3 DiagnosticFunctions 15
3.1.3.4 ProtectionMechanism 15
3.1.3.5 NetworkStates 16
3.1.4 Device Data Base Files 16
3.1.5 Profiles 17
3.2 IntroductionToGWY-500-B 17
3.3 GWY-500-BOperation-ConfigurationAndCommunication 18
3.4 ConfigurationofGWY-500-B (IBMDownload) 18
3.4.1 WhenGWY-500-B canaccept configuration? 19
GWY-500-B FEATURES 20
4.1 GatewayModes 21
4.1.1 Master-MasterConfiguration 21
4.1.2 Master-Slave Configuration 24
4.2 RepeatCycle 27
4.3 ControlWord 27
4.4 ErrorIndicationBit 28
4.5 CommunicationParameters 28
NOTE ON COMMUNICATION DRIVERS 29
5.1 NoteOnCommunicationDrivers 30
TYPICAL PROJECTS 34
6.1 ProjectSetup 35
6.2 ConnectToshibaInverterasProfibusDPV0Slaveon ProfibusNetworkwithGWY-500-B 36
6.3 ConnectModicon PLCor otherModbus Slavedevices as ProfibusDPV0Slave on
Profibus NetworkwithGWY-500-B 38
6.4 ConnectSCADASoftwareonProfibusNetwork 40
CONFIGURATION SOFTWARE 42
7.1 SystemRequirements 43
7.2 InstallationInstruction 43
PROFIBUS MASTER SETUP 44
8.1 Setup Of GWY-500-B withOmronProfibusMaster 45
8.2 SetupOfGWY-500-B withSiemens ProfibusMaster 59
APPLICATIONS 65
9.1 PossibleApplicationsof GWY-500-B 66

INTRODUCTION
INTRODUCTION
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INTRODUCTION
In this chapter. . . .
♦Purposeof thismanual
♦IntroductionToGateway
♦GWY-500-BSpecifications

INTRODUCTION
INTRODUCTION
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1.1 Purpose of this manual
Thankyou for purchasing GWY-500-B Product fromRenu Electronics Pvt. Ltd..
Theintention ofthis UserManual isto providea guidefor Safeinstallation, Configurationand operationof GWY-500-B.
Functionality of all the Gateway models is same.Read this User manual thoroughly before installing and operating
GWY-500-B,
Thisdocument is basedon information availableat the timeof its publication.While efforts havebeen made to be accurate,
theinformation inthis document maynot coverall thedetails or variations in hardwareorsoftware. Features described
herein may not be present in all hardwares. Renu Electronics Pvt. Ltd. reserves the right to update information in this
publicationwithout priornotice.
1.2 Introduction to Gateway
Gatewayis aProtocol Converter/ Datasharer fordevices likePLCs, inverters(Adjustable SpeedDrives),and otherControl-
lers. Gatewayhas two serialports thatconnect with twodifferent devices. Thesedevices share data throughGateway.
Gatewaycommunicates witha device to get theinformation requiredby thedevice connectedon theother port.The device
thatrequires datais calledDestination Deviceand the device thatprovides datais calledSource Device.Information could
be,
-value ofa PLCregister.
- status of a PLC coil.
-Command fromSource Device to Destination Deviceto performany actionat thedestination end.
ConfigurationOfGateway
Note: Please refer ‘IBM Download’ in section 3.4.
COM1 / PLC 1
(RS232/RS485/CMOS)
Profibus - DP (Slave)
PLC1
OK
Profibus
RenuElectronicsPvt.Ltd.
SurveyNo. 2/6, Baner Road,
Pune-411045INDIA
GWY-500-B
DC+ DC- EARTH
}24VDC
+/- 10%
C US
LR 109782-2
Pending

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NormalOperation:
ConnectProfibus Masterdeviceto Gatewayvia Profibusport and serialdevice(PLC orInverter) viathe PLC’s communica-
tionsport (correctcables are required)and thePLCs caneasily exchange information with theProfibus-DP devices.
PLC1
Profibus-DP Protocol
PLC (Profibus Master)
PLC
Drive Motor
Node n
PID Controller
~
~
Node 1
XProtocol
GWY-500-B
Node 2
PLC

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1.3 GWY-500-B Specifications
Power : 24 V DC, 2.5 W
LED’s : 3 LED’s for status indication
CommunicationPorts : 2Communication ports with
COM1 : RS232 / RS422 / RS485 / CMOS
COM2 : Profibus-DPV0Slave (2 WireRS485)
(Isolationbetween communicationports andPower supply, through DC-DC coupleris 1KV)
COM1 /PLC1 : Connects to PC for setup download or connects to PLC1 at runtime.
COM2/ PLC2 : Profibus-DPV0Slave (2Wire RS485)
(Isolationbetween communication ports, through opto-isolationis 1KVrms for 1min)
ProfibusBaudRate : 9.6k, 19.2k, 45.45k, 93.75k, 187.5k, 500k, 1.5M, 3M, 6M, 12M Bit/s
(Autodetect)
GSDFile : Suppliedwith the unit
GSDFile Name : RENU0A0E.GSD
I/Odata : 100Word Input, 100 WordOutput
*Profibus SlaveID : 0 - 125(ID shouldbe providedthrough GatewaySetup Software/PLC2
Settings/Advanced)
OperatingTemperature : 0oto 60oC
StorageTemperature : -20oto80oC
Humidity : 10%to 90%(Non condensing)
Mounting : DINrail orback panel mounting
Dimensions(DINrail) : 105mm(L)X40mm(D) X51mm(W)
Weight : 125gm approx.
Certifications : CE with UL certification
Immunity to ESD : Level3asper IEC1000-4-2
Immunityto Transients : Level3asper IEC1000-4-4
Immunityto RadiatedRF : Level3asperIEC1000-4-3
Immunityto ConductedRF : Level 3asperIEC1000-4-6
Emissions : EN55011CISPRA
Note1 : If Toshiba VF-S11 Inverter is connected at COM1 of GWY-500-B, station number is detected automatically at
power ON and that station number is assigned as a Profibus Slave ID.
InverterID Canbe setfrom 0-99.
Note2 : Once You install Gateway Setup Software, you will find GSD file at:
“C:\Program Files\Gateway3.09\GWY-5oo(Profibus Gateway)\GSD”. Thisis thedefault path. Theactual pathis
wherethe user hasinstalled GatewaySetupSoftware.

HARDWARE
HARDWARE
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HARDWARE
In this chapter. . . .
♦DimensionalDetails AndMounting Instructions
♦CommunicationPort Details
♦LED Status

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2.1 Dimensional details And Mounting Instructions
GWY-500 -B unit can be mounted on a back panel or on a DIN rail or can be left hanging. It comes with a separate DIN rail
plate when it is packed. User will have to attach the DIN rail plate to the unit if it has to be mounted on a panel or DIN rail. If
it has to be left hanging, make sure to screw the cables to the DB9 connectors on the Gateway unit. DIN rail plate also has
the provision to screw the unit to the back panel. Following drawing shows how to attach the DIN rail plate to the unit:
Followinstructions given below:
1. Attach the DIN rail plate to the unit using the clamps on the DIN rail plate.
2. Pull out the clip of the plate.
3. Put the unit on the DIN rail.
4. Push the clip in to secure the unit on the DIN rail.
GWY-500-B unit is shipped with a separate DIN rail plate which has to be attached to the unit, if needed. User can use the
unit with or without the DIN rail plate. Following sketch shows mounting details of GWY-500-B with the DIN rail plate.
DIN rail
clamp
DIN rail
clip
GWY-500
Slot for
clamp
40

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2.2 Communication Port Details
Gwy-500-Bhas two communicationports COM1and COM2. COM1port iscompactible to RS232/RS422/ RS485 and
CMOS signal levels. Pinout of this port is given as follows:
TX-(RS422/RS485)
DB9 Female
1
5
9
6
+5VDC*
(DO NOT USE)
SignalGround
RX+(RS422/RS485)
RXD(RS232C/CMOS)
TXD(RS232C)
TX+(RS422/RS485)
TXD(CMOS)
RX-(RS422/RS485)
6
8
9
72
4
5
3
1
PLC1 / COM1
*Do not use pin no. 6 of PLC1 / COM1.
**Referour website (www.renuelectronics.com)foryourspecific Cablerequirements

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Pin Name Signal Level Description
1. TX+ RS422/RS485 Differential Transmit+, alsoreferredas TXA
2. TXD RS232 Transmit
3. RXD RS232/ CMOS Receive
4. RX+ RS422/RS485 DifferentialReceive +,alsoreferred asRXA
5. GND - Signal Ground common to all signals.
6. +5VDC - DO NOT USE
7. TXD CMOS Transmit
8. TX- RS422/RS485 Differential Transmit-,also referredasTXB
9. RX- RS422/ RS485 DifferentialReceive-,also referredasRXB
PinDescription
User can convert RS485 4 wire + Signal Ground system to a 2 Wire + Signal Ground system by shorting following
signals in the communication cable:
TX+
TX- A
RX+ B
RX-
SG SG
Note: If user has attached shield to Earth on Device end, leave the shield open on Gateway end. If user has
connected shield to Signal Ground on Device end, connect shield to Signal Ground on Gateway end.
A and B are polarity insensitive. Twisted pair cable should be used for Rs485 Network.
Upto 31 Devices can be multi-dropped on RS485 port of Gateway.

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+5V DC
300Ohm
220Ohm
300Ohm
B - Data Line
A - Data Line
Data Ground
Data Line: The Profibus user group recommends the following color coding for the data signal lines:
A-Data Line = Green B-Data Line = Red
These data signal lines must be connected to the corresponding signal terminals or pins at the master unit
and other stations (i.e.A to A, B to B).
RTS: The signal RTS (TTL signal relative to Data Ground) is meant for the direction control of repeaters in
case repeaters without self control capability are used.
+5V DC, Data Ground: The signals +5V DC and Data Ground are meant to power an externally mounted
bus terminator.
The powering of the 220 © termination resistor ensures a defined idle state potential on the data lines. To
ensure proper functioning up to the highest baud rate, each bus segment has to be terminated at both ends
of the cable.
B (-) Data Line
A (+) Data Line
DB9Female
1
5
9
6
+5V DC
Data Ground
RTS
Shield / Functional
Ground
6
84
5
3
1
Profibus- DPSlave
(TTL Direction control for repeaters)
(Supply Voltage for terminator resistance)

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2.3 LED Status
There are 3 Bicolor LEDs for status indication.
BicolourLEDsstatus:
LED
OK Green OFF NoFirmware
Flashing IBMDownload
ON Bothside (COM1 and COM2) communicationOK
Red OFF ConfigurationOk
ON ConfigurationFault
PLC1 Green OFF No datareceivedon PLC1Port
Flashing Recevingdata on PLC1Port
ON -
Red OFF No error in PLC1 attach or while block execution
Flashing PLC1attach erroror error whileblock execution
ON -
Profibus Green OFF No datareceivedon ProfibusPort
Flashing Recevingdata on ProfibusPort
ON -
Red OFF Data exchangewith ProfibusMaster
Flashing -
ON Nodata exchangewith Profibus Master

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GETTING STARTED
In this chapter. . . .
♦IntroductionToProfibus
♦IntroductionToGWY-500-B
♦GWY-500-BOperation

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3.1 Introduction To Profibus
PROFIBUSis avendor-independent,open fieldbusstandard fora wide rangeof applicationsinmanufacturing, process
andbuilding automation.Vendor independenceand opennessare guaranteedby thePROFIBUSstandard EN50170. With
PROFIBUS,devices ofdifferentmanufacturers cancommunicate withoutspecial interface adjustments.ThePROFIBUS
familyconsists of three compatible versions:
Highspeed PROFIBUS-DP
DP stands for Decentralised Periphery. It is optimised for high speed and low cost interfacing,
especiallydesigned forcommunication between automationcontrolsystems and distributed I/O
atthe device level.
ProcessAutomation PROFIBUS-PA
PA stands for Process Automation. It permits sensors and actuators to be connected on one
commonbus line even in intrinsically-safeareas. Itpermits datacommunication andpower
supply overthe bususing 2-wiretechnology accordingthe internationalstandard IEC1158-2.
Higherlevel PROFIBUS-FMS
FMS standsfor FieldbusMessage Specification. Thisversion isthe generalpurpose solution for
communicationtasks ata higher level. Powerful servicesopen upa widerange ofapplications
and provide great flexibility. It can also be used for extensive and complex communications tasks.
Uniformbus access PROFIBUS-DPand PROFIBUS-FMSuse the same transmission technologyand auniform bus
protocol access protocol. Thus, both versions can be operated simultaneously on the same cable.
However, FMSfield devicescannot becontrolled byDP mastersor viceversa.
Note: It is not possible to exchange one of these family members by another family
member. Thiswill causefaulty operation.
Therest of this section onlydescribes PROFIBUS-DP.Protocol architecture.
3.1.1 Protocol Architecture
OSI ThePROFIBUS protocolarchitecture isoriented onthe OSI (Open System Interconnection)
referencemodel inaccordance withthe international standard ISO7498. Layer1 (physicallayer)
of this model defines the physical transmission characteristics. Layer 2 (data link layer) defines
the bus access protocol. Layer 7 (application layer) defines the application functions.
DP-Profiles
DP- Extentions
DP- Basic Functions
NotDefined
Field Bus Data Link (FDL)
RS-485 / Fiber optics
UserInterfaceLayer
(7) ApplicationLayer
(6)Presentation Layer
(5)Session Layer
(4)TransportLayer
(3)NetworkLayer
(2)Data LinkLayer
(1) Physical Layer

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Layer 1, 2 anduser PROFIBUS-DP uses layers 1 and 2, and the user interface. Layers 3 to 7 are not
interface defined.This streamlinedarchitecture ensuresfast andefficient datatransmission. The
application functions which are available to the user, as well as the system and device
behaviourof thevariousPROFIBUS-DP devicetypes, arespecified intheuser interface.
Transmissionmedium RS-485 transmission technology or fibreoptics areavailable fortransmission. RS-485
transmission is the most frequently used transmission technology. Its application area
includesall areas in which high transmission speedand simple inexpensiveinstallation
High-speed,inexpensive arerequired. Twisted pairshielded copper cable with oneconductor pairis used.
Easy installation TheRS-485 transmission technology isvery easy tohandle. Installation of thetwisted
paircable doesnot require expert knowledge. Thebus structurepermits additionand
removalof stations orstep-by-step commissioning of the systemwithout influencing the
otherstations. Later expansions have noeffect onstations which arealready inopera
tion. Transmission speeds between 9.6 kbit/s and 12 Mbit/s can be selected. One
unique transmission speed is selected for all devices on the bus when the system is
commissioned.
Cable length Themaximum cablelength depends onthe transmissionspeed The specified cable
lengths are based on type-A cable. The length can be increased by the use of repeaters.
The use of more than 3 repeaters in series is not recommended.
3.1.2 Device Types
PROFIBUSdistinguishes betweenmasterdevices andslave devices.
Master devices Master devices determine the data communication on the bus. A master can send
messages without an external request, as long as it holds the bus access right (the
token). Masters are also called active stations in the PROFIBUS standard.
DPM1, DPM2 There are two types of master devices: DP master class1 (DPM1) and DP master class2
(DPM2). A DPM1 is a central controller which exchanges information with the
decentralised stations (i.e. DP slaves) within a specified message cycle. DPM2 devices
areprogrammers, configurationdevicesor operatorpanels.They areused duringcom
missioning,for configurationof the DP system, orforoperation andmonitoring purposes.
Slave devices Slavedevicesare peripheraldevices. Typicalslave devicesincludeinput/output devices,
valves,drives, andmeasuring transmitters. Theydo nothave busaccess rightsand they
canonly acknowledge received messages orsend messages to the masterwhen
requested to do so. Slaves are also called passive stations.

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3.1.3 PROFIBUS-DP Charactristics
3.1.3.1 Bus Access Protocol
Layer 2 The bus access protocol is implemented by layer 2. This protocol also includes data
security and the handling of the transmission protocols and messages.
Medium Access Control TheMediumAccess Control(MAC) specifiesthe procedures which determine
when a station is permitted to transmit data. A token passing procedure is used to
handle the bus access between master devices, and a polling procedure is used to
handlethe communicationbetween amaster deviceand itsassigned slavedevice(s).
Token passing The token passing procedure guarantees that the bus access right (the token) is
assigned to each master within a precisely defined time frame. The token message, a
special message for passing access rights from one master to the next master, must
be passed around the logical token ring - once to each master - within a specified target
rotation time. Each master executes this procedure automatically. A user can only
change the target rotation time, but is not recommended.
Polling procedure The polling ormaster-slave procedurepermits themaster,which currentlyowns the
token, to access its assigned slaves. The picture below shows a possible configuration
Theconfiguration shows three active stations(masters) andsix passive stations
(slaves).
The three masters form a logical token ring. When an active station receives the token
message, it can perform its master role for a certain period of time. During this time it
can communicate with all assigned slave stations in a master- slave communication
relationship, and a DPM2 master can take the initiative to communicate with DPM1
masterstations in a master-mastercommunication relationship.
Multi-peer communication Inaddition tologicalpeer-to-peer datatransmission, PROFIBUS-DP providesmulti-peer
communication(broadcast andmulticast).
Broadcast communication:An activestation sendsan unacknowledged message to
all other stations (masters and slaves).
Multicast communication: An active station sends an unacknowledged message to a
predetermined group of stations (masters and slaves).

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3.1.3.2 Data Throughput
Transmission time At 12 Mbit/s, PROFIBUS-DP requires only about 1 ms for the transmission of
512 bits of input data and 512 bits of output data distributed over 32 stations.
Thefigure belowshows thetypical PROFIBUS-DPtransmission timedepending
onthe number of stations andthe transmissionspeed. The datathroughput
will decrease when more than one master is used.
3.1.3.3 Diagnostic Functions
Extensivediagnostics Theextensive diagnosticfunctions ofPROFIBUS-DP enablefast locationof faults
The diagnostic messages are transmitted over the bus and collected at the
master.These messagesare dividedinto threelevels:
Device related diagnostics 1.Device related diagnostics
Thesemessages concernthe generaloperational statusof thewhole device
(e.g.overtemperatureorlowvoltage).
Modulerelated 2. Module relateddiagnostics
diagnostics These messages indicate that a fault is present in a specific I/O range (e.g. an
8-bit output module) of a station.
Channelrelated 3. Channel relateddiagnostics
Thesemessages indicate an error atan individualinput or output (e.g. short
circuit on output 5).
3.1.3.4 Protection Mechanism
Time monitoring PROFIBUS-DPprovideseffective protectionfunctionsagainstparameterisation
errorsor failureof the transmissionequipment. Timemonitoring isprovided
at the DP master and at the DP slaves. The monitoring interval is specified
duringtheconfiguration.
At the master 1. Protection mechanism at the master.
The DPM1 master monitors data transmission of its active slaves with the
Data_Control_Timer. Aseparate controltimer isused for each slave. Thistimer
expires when correct data transmission does not occur within the monitoring
interval.
If the master’s Auto_Clear mode is enabled, the DPM1 exits the ’Operate’
state, switches the outputs of all assigned slaves to fail-safe status, and
changes to its ’Clear’ state.

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At the slave 1. Protection mechanisms at the slave.
The slave uses the watchdog control to detect failures of the master or the transmission
line. If no data communication with the master occurs within the watchdog control
interval, the slave automatically switches its outputs to the fail-safe status. This
mechanismcan beenabled or disabledfor eachindividual slave.
Also, access protection is available for the inputs and outputs of the DP slaves operat
ing in multi-master systems. This ensures that direct access can onlybe performedby
theauthorised master. For othermasters, the slaves offeran image oftheir inputsand
outputs, which can be read by any master, even without access rights.
3.1.3.5 Network States
PROFIBUS-DPdistinguishes fourdifferentnetwork states.
Off-line 1.Off-line
Communicationbetween all DP participants isstopped.
Stop 2. Stop
Communicationbetween DPM1and DP slaves is stopped.Only communication
between DPM1 and DPM2 is possible.
Clear 3.Clear
DPM1 master attempts to set parameters, check the configuration, and subsequently
performdata exchangewith its associated DP-slaves. Thedata exchangecomprises
reading the inputsof theDP-slaves and writingzero’s to the outputsof theDP-slaves.
Operate 4.Operate
DPM1 master exchanges data with its assigned slaves, inputs are read and outputs are
written. Beside this, the DPM1 cyclically sends its local status to all assigned DP
slaves(with a multicast message) ata configurabletime interval.
Auto_Clear Whenan error occurs during thedata transferphase of theDPM1, the‘Auto_Clear’
configuration setting determines the subsequent actions. If this parameter is set to
false, the DPM1 remains in the ‘Operate’ state. If set to true, the DPM1 switches the
outputs of all assigned DP slaves to the fail-safe state and the network state changes to
the ‘Clear’ state.
3.1.4 Device Data Base Files
GSD-file Toachieve straightforwardconfigurationof aPROFIBUS-DP network,thecharacteristic
features of a device are specified in a file. This file is called a GSD-file
(Gerätestammdaten file). Thelanguage ofthe GSD fileis expressed withthe last letter
from the extension, *.GS?:
Default : = GSD
English : = GSE
Deutsch : = GSG
Italian : = GSI
Portugees : = GSP
Spanish : = GSS
TheGSD filesareprepared individuallyby thevendor foreachtype ofdevice, according
toa fixedformat. Someparameters aremandatory, some have a defaultvalue andsome
areoptional. Thedevice data base file isdivided intothree parts: