DEUTSCHMANN AUTOMATION UNIGATE SC232/485 User manual

Instruction manual
Universal Fieldbus-Gateway
UNIGATE®
UNIGATE SC232/485 - Fast Ethernet
UNIGATE SC232/422 - Fast Ethernet
V3299E
Deutschmann Automation GmbH & Co. KG Carl-Zeiss-Str. 8 D-65520 Bad Camberg
Tel:[phone] Hotline: [phone] Fax: [phone]
Internet: http://www.deutschmann.de

21.4.11 UNIGATE fieldbus gateway for Fast Ethernet V. 2.1 3
Deutschmann Automation GmbH & Co. KG
1 Information on CE marking of the module . . . . . . . . . . . . . . . 8
1.1 EU Directive EMC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.2 Scope of application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3 Note installation guidelines . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.4 Installation of the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.5 Working on switch cabinets . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 Information for the machine manufacturer . . . . . . . . . . . . . . . 9
2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 EU Machinery Directive 89/392/EEC . . . . . . . . . . . . . . . . . . . . 9
3 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 UNIGATE SC-Fast Ethernet software flow chart . . . . . . . . . . . . . 11
3.2 UNIGATE application diagram . . . . . . . . . . . . . . . . . . . . . . 12
4 RS-interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 RS-interface at the UNIGATE SC-Fast Ethernet . . . . . . . . . . . . . 13
5 Operation modes of the gateway . . . . . . . . . . . . . . . . . . . 14
5.1 Configuration mode (config mode) . . . . . . . . . . . . . . . . . . . . 14
5.2 Test mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.3 Data exchange mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6 Mode of operation of the system . . . . . . . . . . . . . . . . . . . 16
6.1 General explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.2 Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.3 Data exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.4 Possible data lengths . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.5 Run-up phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7 Generating a script - only for UNIGATE SC-Fast Ethernet . . . . . . 17
7.1 What is a script? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.2 Memory efficiency of the programs . . . . . . . . . . . . . . . . . . . . 17
7.3 What can you do with a script device? . . . . . . . . . . . . . . . . . . 17
7.4 Independence of buses . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.5 Further settings at the UNIGATE SC-Fast Ethernet . . . . . . . . . . . 18
7.6 The use of the Protocol Developer . . . . . . . . . . . . . . . . . . . . 18
7.7 Accuracies of the baud rates at UNIGATE SC . . . . . . . . . . . . . . 18
7.8 Script processing times . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8 Hardware ports, switches and LEDs . . . . . . . . . . . . . . . . . . 20
8.1 Drawing of the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8.1.1 Model UNIGATE SC232/485-Fast Ethernet . . . . . . . . . . . . . . . . . . 20
8.1.2 Model UNIGATE SC232/422-Fast Ethernet . . . . . . . . . . . . . . . . . . 21
8.2 Configuration of the UNIGATE SC-Fast Ethernet . . . . . . . . . . . . . 21
8.2.1 Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8.3 Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
8.3.1 Connector to the external device (RS-interface) . . . . . . . . . . . . . . . . 22
8.3.2 Ethernet 10/100BASE-T-connection RJ45-plug connector . . . . . . . . . . . 23
8.3.3 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8.3.4 Shield terminal lead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8.4 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

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4 UNIGATE fieldbus gateway for Fast Ethernet V. 2.1 21.4.11
8.4.1 LED “Bus State“ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
8.4.2 LED "Bus Link" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
8.4.3 LED "Full Duplex" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
8.4.4 LED "10 MB" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
8.4.5 LED "100 MB" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
8.4.6 LED "Collision" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
8.4.7 LED “Power“ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
8.4.8 LED “State“ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
8.4.9 LEDs “Error No. / Select ID“ at UNIGATE SC-Fast Ethernet . . . . . . . . . .24
8.5 Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8.5.1 Rotary coding switches S4 + S5 (RS485 ID) . . . . . . . . . . . . . . . . . .24
8.5.2 Slide switch (RS485/RS232 interface) . . . . . . . . . . . . . . . . . . . . . .24
8.5.3 Slide switch (RS485/RS422 termination) . . . . . . . . . . . . . . . . . . . .25
9 Error handling at UNIGATE SC-Fast Ethernet . . . . . . . . . . . . . 26
10 Installation guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . 27
10.1 Installation of the module . . . . . . . . . . . . . . . . . . . . . . . . . 27
10.1.1 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
10.1.2 Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
10.2 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
10.2.1 Connection systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
10.2.2 Ethernet communication interface . . . . . . . . . . . . . . . . . . . . . . . .28
10.2.2.1 Bus line with copper cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10.2.2.2 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10.2.2.3 Shield connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10.2.2.4 Equipotential bonding connection . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10.2.3 Line routing, shield and measures to combat interference voltage . . . . . . .28
10.2.4 General information on line routing . . . . . . . . . . . . . . . . . . . . . . .28
10.2.4.1 Shielding of lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
11 Representation of the data in Ethernet-TCP/IP . . . . . . . . . . . . 31
11.1 Network-addresses, network-connections . . . . . . . . . . . . . . . . 31
11.2 TCP-connection setup . . . . . . . . . . . . . . . . . . . . . . . . . . 31
11.3 Data exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
11.3.1 TCP or UDP? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
11.4 Data exchange mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
11.4.1 Direct data exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
11.4.2 MODBUS-TCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
11.4.3 E-mail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
11.4.4 Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
11.4.4.1 Webserver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
11.4.4.2 FTP-server. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
11.4.4.3 File system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
12 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
12.1 Device data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
12.1.1 Interface data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
13 Commissioning guide . . . . . . . . . . . . . . . . . . . . . . . . . . 37
13.1 Note . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

21.4.11 UNIGATE fieldbus gateway for Fast Ethernet V. 2.1 5
Deutschmann Automation GmbH & Co. KG
13.2 Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
13.3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
13.4 Dimensional drawing DIN-rail mounting . . . . . . . . . . . . . . . . . . 37
13.5 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
13.6 Ethernet connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
13.7 Connection of the process device . . . . . . . . . . . . . . . . . . . . . 37
13.8 Connecting the supply voltage . . . . . . . . . . . . . . . . . . . . . . 38
13.9 Shield connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
13.10 Project planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
13.11 Literature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
14 Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
14.1 Returning a device . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
14.2 Downloading PC software and GSD files etc. . . . . . . . . . . . . . . . 39
15 Annex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
15.1 Explanations of the abbreviations . . . . . . . . . . . . . . . . . . . . . 40
15.2 Hexadecimal table . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Deutschmann Automation GmbH & Co. KG
6 UNIGATE fieldbus gateway for Fast Ethernet V. 2.1 21.4.11

21.4.11 UNIGATE fieldbus gateway for Fast Ethernet V. 2.1 7
Deutschmann Automation GmbH & Co. KG
Disclaimer of liability
We have checked the contents of the document for conformity with the hardware and software
described. Nevertheless, we are unable to preclude the possibility of deviations so that we are
unable to assume warranty for full compliance. The information given in the publication is,
however, reviewed regularly. Necessary amendments are incorporated in the following editions.
We would be pleased to receive any improvement proposals which you may have.
Copyright
Copyright (C) Deutschmann Automation GmbH & Co. KG 1997 – 2011. All rights reserved.
This document may not be passed on nor duplicated, nor may its contents be used or disclosed
unless expressly permitted. Violations of this clause will necessarily lead to compensation in
damages. All rights reserved, in particular rights of granting of patents or registration of
utility-model patents.
Art.-No.: V3299E

Information on CE marking of the module Deutschmann Automation GmbH & Co. KG
8 UNIGATE fieldbus gateway for Fast Ethernet V. 2.1 21.4.11
1 Information on CE marking of the module
1.1 EU Directive EMC
The following applies to the module described in this User Manual:
Products which bear the CE mark comply with the requirements of EU Directive „Electromagnetic
Compatibility“ and the harmonized European Standards (EN) listed therein.
The EU Declarations of Conformity are available at the following location for perusal by the
responsible authorities in accordance with the EU Directive, Article 10:
Deutschmann Automation GmbH & Co. KG, Carl-Zeiss-Straße 8, D-65520 Bad Camberg, Ger-
many
1.2 Scope of application
1.3 Note installation guidelines
The module complies with the requirements if you
1. comply with the installation guidelines described in the User Manual when installing and
operating the module.
2. also follow the rules below on installation of the equipment and on working on switch cabi-
nets.
1.4 Installation of the unit
Modules must be installed in electrical equipment rooms/areas or in enclosed housings (e. g.
switch boxes made of metal or plastic). Moreover, you must earth the unit and the switch box
(metal box) or at least the top-hat rail (plastic box) onto which the module has been snapped.
1.5 Working on switch cabinets
In order to protect the modules against static electrical discharge, the personnel must discharge
themselves electrostatically before opening switch cabinets or switch boxes.
Scope of application Requirement applicable to
Emitted interference Interference immunity
Industry EN 55011 Kl. A EN 61000-6-2

21.4.11 UNIGATE fieldbus gateway for Fast Ethernet V. 2.1 9
Deutschmann Automation GmbH & Co. KG Information for the machine manufacturer
2 Information for the machine manufacturer
2.1 Introduction
The UNIGATE Fast Ethernet does not constitute a machine as defined by the EU "Machinery“
Directive. Consequently, the module does not have a Declaration of Conformity in relation to the
EU Machinery Directive.
2.2 EU Machinery Directive 89/392/EEC
The EU Machinery Directive stipulates the requirements applicable to a machine. The term
"machine" is taken to mean a totality of connected parts or fixtures (see also EN 292-1, Para-
graph 3.1)
The module is a part of the electrical equipment of the machine and must thus be included by the
machine manufacturer in the Declaration of Conformity process.

Introduction Deutschmann Automation GmbH & Co. KG
10 UNIGATE fieldbus gateway for Fast Ethernet V. 2.1 21.4.11
3 Introduction
The UNIGATE SC232/485-Fast Ethernet module serves to adapt a serial port to an Ethernet with
TCP/IP-protocol. In this application it functions as a gateway. It can be operated at any process-
ing system with TCP/IP-protocol and UDP-protocol.
The module SC essentially consists of the following hardware components:
•Electrically isolated 10/100 BaseT interface to the Ethernet
•Ethernet controller W3100A and REALTEK RTL8201L
•Microprocessor 80 C 32
•RAM, EPROM and EEROM
•Optionally electrically isolated
•Serial port (RS232, RS485 and RS422) to the device connected externally
Please note:
This instruction manual is valid for UNIGATE SC (gateway capable for
scripts).
The information given in this instruction manual is about the UNIGATE
SC-Fast Ethernet, unless differences are explicitly pointed out.

21.4.11 UNIGATE fieldbus gateway for Fast Ethernet V. 2.1 11
Deutschmann Automation GmbH & Co. KG Introduction
3.1 UNIGATE SC-Fast Ethernet software flow chart

Introduction Deutschmann Automation GmbH & Co. KG
12 UNIGATE fieldbus gateway for Fast Ethernet V. 2.1 21.4.11
3.2 UNIGATE application diagram
The following graph shows a typical connection scheme.

21.4.11 UNIGATE fieldbus gateway for Fast Ethernet V. 2.1 13
Deutschmann Automation GmbH & Co. KG RS-interface
4 RS-interface
4.1 RS-interface at the UNIGATE SC-Fast Ethernet
On principle the hardware cannot be distinguished from the standard gateway. In addition to the
regular hardware, a special hardware version is available, which however, is only required for the
generation of a script. Due to technical reasons this advanced hardware is not available for all
buses; a development can be made on another than the target hardware though.
Compared to the standard gateway, this development gateway is equipped with an extra-inter-
face RS232, which however, is only available to the outside at the version with 9-pole D-SUB.
This debug-interface itself is always operated with 9600 baud, no parity, 8 data bits and 1 stop
bit. Apart from that there are no further differences, neither in the software nor in the hardware.

Operation modes of the gateway Deutschmann Automation GmbH & Co. KG
14 UNIGATE fieldbus gateway for Fast Ethernet V. 2.1 21.4.11
5 Operation modes of the gateway
5.1 Configuration mode (config mode)
The configuration mode serves to configure the gateway. Adjustments at the gateway’s configu-
ration are only possible in this mode. The gateway will be starting in this mode in case both
switches S4 as well as S5 are set on position "F" when switching on the gateway and also
RS232 is to be selected as interface. Right after switching on the gateway in the configuration
mode it will be sending its starting message, that looks analog with the following message:
"RS-FE-SC P(232/485) V1.52[28] (c)dA Switch=0xFF Script(8k)="Leer" Author="Deutschmann
Automation GmbH" Version="1.0" Date=21.08.2001 SN=47110001 IP=0.0.0.0".
In the configuration mode the gateway always operates with the settings 9600 Bauds, no Parity,
8 Databits and 1 Stopbit, the RS-State LED will always be flashing red, the "Error No/Select ID"
LEDs are of no account for the user. All software revisions contain the configuration mode.
Connection cable from the gateway to the PC
The cable is supposed to look as follows
Connection table 5pin screw-plug connector - PC
5.2 Test mode
Setting of the test mode
The test mode is set by bringing the switches S4 and S5 in position "E". Beyond it the interface
switch has to be set on "232". All other switches will not be taken into consideration for the set-
ting of the test mode. Now the gateway has to be restarted with these settings (by a short discon-
nection from the power supply).
The test mode is contained from software revision V3.0 on. The test mode may be helpful to inte-
grate the gateway in the relevant environment, for instance to "see" permanent changing data of
the fieldbus in the SPS or also in order to test the parameters of the RS-interface.
Screw-plug-connector Name D-SUB plug-connector Name
Pin 3 Rx Pin 3 Tx
Pin 4 Tx Pin 2 Rx
Pin 5 GND Pin 5 GND

21.4.11 UNIGATE fieldbus gateway for Fast Ethernet V. 2.1 15
Deutschmann Automation GmbH & Co. KG Operation modes of the gateway
Mode of operation of the test mode
After the restart in the test mode the gateway will be sending the values 0-15 in hexadecimal rep-
resentation ("0".."F") in ASCII-coding with the current settings for the Baud rate, Parity, Start-,
Data-, and Stopbits on the serial side every second. Simultaneously the same values are issued
binary on the fieldbus-interface provided that this is possible on the fieldbus at the moment (In
case the fieldbus has a data width of more than 1 byte, all characters of the fieldbus will be set to
the current test character).
In this mode the State-LED on the RS-side will be flashing red, the "Error No/Select ID" LEDs will
be displaying the value in a binary way, that is issued that moment. Additionally each character
that is received at one of the interfaces will also be output at the same interface as a local echo.
On the fielbus-side only the first byte will be used for the local echo, that means on receiving as
well as on transmitting only the first byte of the bus data is looked at, the other bus data do not
change compared to the last data.
5.3 Data exchange mode
The gateway has to be in the data exchange mode, so that a data exchange between the
RS-side of the gateway and the fieldbus is possible. As long as the gateway is not in the configu-
ration mode or the test mode, the data exchange mode is active. In the data exchange mode the
gateway will carry out the Script.

Mode of operation of the system Deutschmann Automation GmbH & Co. KG
16 UNIGATE fieldbus gateway for Fast Ethernet V. 2.1 21.4.11
6 Mode of operation of the system
6.1 General explanation
Communication can be split into seven layers, Layer 1 to Layer 7, in accordance with the
ISO/OSI Model.
The DEUTSCHMANN AUTOMATION gateways convert Layers 1 and 2 of the customized bus
system (RS485 / RS232) to the corresponding fieldbus system. Layers 3 and 4 are covered by
the UDP/IP-protocol, TCP/IP-protocol, Layer 5 and 6 are blank, and Layer 7 is forwarded trans-
parently on the standard gateways. However, customized adaptations are also possible here (e.
g. adaptations to existing profiles of the fieldbus systems).
The gateway can be configured through the software WINGATE®that is also supplied (see also
chapter 8.2).
6.2 Interfaces
The gateway features the RS232 and RS485 interfaces. Switchover is performed by means of a
slide switch accessible for the customer. The Ethernet gateway thus allows access to all devices
connected to the RS485 bus via one single Internet address resp. access to the device con-
nected to the RS232 interface.
6.3 Data exchange
The Ethernet-Client processor sends the output data to the gateway. The data received from the
master is transferred in the gateway to the external device in accordance with the selected proto-
col. The external device responds in accordance with the protocol conventions.
The data received from the external device is sent by the gateway to the responsible client pro-
cessor via the TCP/IP-protocol or the UDP/IP-protocol.
6.4 Possible data lengths
The table below shows the maximum transferable data:
6.5 Run-up phase
In the run-up phase the master establishes a TCP/IP-connection to the gateway. Data exchange
with the external device does not occur until after the run-up phase has been completed with no
errors.
Input data max. 1000 bytes Variable: maximum value in this case
Output data max. 1000 bytes Variable: maximum value in this case

21.4.11 UNIGATE fieldbus gateway for Fast Ethernet V. 2.1 17
Deutschmann Automation GmbH & Co. KG Generating a script - only for UNIGATE SC-Fast Ethernet
7 Generating a script - only for UNIGATE SC-Fast Ethernet
7.1 What is a script?
A script is a sequence of commands, that are executed in that exact order. Because of the fact
that also mechanisms are given that control the program flow in the script it is also possible to
assemble more complex processes from these simple commands.
The script is memory-oriented. It means that all variables always refer to one memory area.
While developing a script you do not have to take care of the memory management though. The
Protocol Developer takes on this responsibility for you.
7.2 Memory efficiency of the programs
A script command can carry out e. g. a complex checksum like a CRC-16 calculation via data.
For the coding of this command only 9 byte are required as memory space (for the command
itself). This is only possible when these complex commands are contained in a library.
A further advantage of this library is, that the underlying functions have been in practical use for a
couple of years and therefore can be described as ’void of errors’. As these commands are also
present in the native code for the controller, at this point also the runtime performance of the
script is favorable.
7.3 What can you do with a script device?
Our script devices are in the position to process a lot of commands. In this case a command is
always a small firmly outlined task. All commands can be put into classes or groups. A group of
commands deals with the communication in general. This group’s commands enable the gate-
way to send and receive data on the serial side as well as on the bus-side.
7.4 Independence of buses
Basically the scripts do not depend on the bus, they are supposed to operate on. It means that a
script which was developed on a Profibus gateway can also be operated on an Interbus without
changes, since the functioning of these buses is very similar. In order to also process this script
on an Ethernet gateway, perhaps further adjustments have to be made in the script, so that the
script can be executed reasonably.
There are no fixed rules how which scripts have to operate properly. When writing a script you
should take into account on which target hardware the script is to be executed, so the necessary
settings for the respective buses can be made.
The Ethernet gateway has 4 communication channels.
For the channels the following adjustments in the script in each case have to be made:
* The port numbers (Destination-Port and Source-Port)
* At client operation TCP or at UDP the destination-IP-address
* The mode or the protocol of the channel:
0 = TCP-server,
1 = TCP-client,
2 = UDP,
3 = Channel not used (closed)
WIthout these settings a connection to the gateway cannot be set up via the Ethernet. Only
ICMP-data traffic (PING) is possible.

Generating a script - only for UNIGATE SC-Fast Ethernet Deutschmann Automation GmbH & Co. KG
18 UNIGATE fieldbus gateway for Fast Ethernet V. 2.1 21.4.11
7.5 Further settings at the UNIGATE SC-Fast Ethernet
Most devices require no further adjustments, except for those made in the script itself. However,
there are also exceptions to it. These settings are made by means of the software WINGATE. If
you know our UNIGATE-series, you are already familiar with the proceeding with it. An example
is the adjustment of the IP-address and the net-mask of an Ethernet-gateway. These values
have to be known as fixed values and are not available for the runtime. Another reason for the
configuration of the values in WINGATE is the following: After an update of the script these val-
ues remain untouched, i. e. the settings that were made once are still available after a change of
the script.
Only this way it is also possible that the same script operates on different Ethernet-gateways,
that feature different IP-addresses.
7.6 The use of the Protocol Developer
The Protocol Developer is a tool for an easy generation of a script for our script gateways. Its
operation is exactly aimed at this use. After starting the program the script that was loaded the
last time is loaded again, provided that it is not the first start.
Typical for Windows script commands can be added by means of the mouse or the keyboard. As
far as defined and required for the corresponding command, the dialog to the corresponding
command is displayed, and after entering the values the right text is automatically added to the
script. The insertion of new commands by the Protocol Developer is carried out in a way that
existing commands will not be overwritten. Generally a new command is inserted in front of the
one where the cursor is positioned. Of course the commands can also be written by means of the
keyboard or already written commands can also be modified.
7.7 Accuracies of the baud rates at UNIGATE SC
The baud rate of the serial interface is derived from the processor’s crystal frequency.
Meanwhile all Script-gateways, except for the MPI-Gateways (20 MHz), are working with a crys-
tal frequency of 40 MHz.
You can enter any desired integer baud rate into the script. After that the firmware adjusts the
baud rate, that can be derived the most precisely from the crystal frequency.
The baud rate the gateway is actually working with (BaudIst) can be determined as follows:
BaudIst = (F32 / K)
F32 = Crystal frequency [Hz] / 32
K = Round (F32 / BaudSoll);
Round () is a commercial roundoff
Example:
The actual baud rate is to be calculated, when 9600 baud are pre-set, where the gateway is
operated with 40 MHz:
F32 = 40000000 / 32 = 1250000
K = Round(1250000 / 9600) = Round(130.208) = 130
BaudIst = 1250000 / 130 = 9615.38
I. e.: The baud rate actually adjusted by the gateway is 9615.38 baud
The resulting error in per cent can be calculated as follows:
Error[%] = (abs(BaudIst - BaudSoll) / BaudSoll) * 100
In our example the following error results:

21.4.11 UNIGATE fieldbus gateway for Fast Ethernet V. 2.1 19
Deutschmann Automation GmbH & Co. KG Generating a script - only for UNIGATE SC-Fast Ethernet
Error = (abs(9615.38 - 9600) / 9600) * 100 = 0.16%
In practise errors below 2% can be tolerated!
In the following please find a listing of baud rates at a 40 MHz-crystal frequency with the corre-
sponding errors:
4800 baud: 0.16%
9600 baud: 0.16%
19200 baud: 0.16%
38400 baud: 1.35%
57600 baud: 1.35%
62500 baud: 0%
115200 baud: 1.35%
312500 baud: 0%
625000 baud: 0%
7.8 Script processing times
The Script is translated by the Protocol Developer and the consequently generated code is
loaded into the Gateway. Now the processor in the Gateway interprets this code. In this case,
there are commands that can be processed very fast (e. g. "Set Parameter"). There are also
commands, however, that take longer (e. g. copying 1000 bytes). Consequently, for one thing the
processing time differs due to the kind of Sript command. But the processing time of the Script
commands is considerably more determined by the processor time that is available for this pro-
cess. Since the processor has to carry out several tasks simultaneously (multitasking system)
only a part of the processor's capacity is available for the Script processing. The following tasks -
in the order of priority - are executed on the processor:
•Sending and receiving data at the Debug-interface (provided that the Protocol Developer has
been started on the PC)
•Sending and receiving data at the RS-interface
•Sending and receiving data at the Fieldbus-interface
•Tasks controlled via internal clock (1 ms) (e. g. flashing of an LED)
•Processing of the Script
From experience approximately 0.5 ms can be calculated for each Script line. This value con-
firmed itself again and again in many projects as a standard value. He is always quite right if the
processor has enough time available for the Script processing.
By means of the tasks mentioned above, the following recommendation can be formulated in
order to receive a rather fast Script processing:
•Deactivate the Debug-interface (it is the normal case in the serial use)
•Keep the data length at the RS-interface as small as possible. The baud rate is not the problem
here, but the amount of characters which are transfered per second.
•Do not unnecessarily extend the data length at the Fieldbus side. Especially at acyclical bus
data, if possible do only send them when changes were made. The data length at buses that
are configured to a fixed length (e. g. Profibus) should not be longer than absolutely necessary.
If the processing time should be too large in spite of these measures, there is the possibility to
generate a customized Script command, that executes several tasks in one Script command.
Please contact our support department for this purpose.

Hardware ports, switches and LEDs Deutschmann Automation GmbH & Co. KG
20 UNIGATE fieldbus gateway for Fast Ethernet V. 2.1 21.4.11
8 Hardware ports, switches and LEDs
8.1 Drawing of the unit
8.1.1 Model UNIGATE SC232/485-Fast Ethernet