W&T 58631, 58641, 58034, 58031, 58231 User Manual

...

Download

Page 1

Manual

Com-Server Highspeed

Release 2.10, October 2006

Type 58631, 58641,

58633, 58031, 58034, 58231, 58431, 58432, 58331, 58334 Com-Server Firmware 1.52 or higher

W&T

Page 2

W&T

Since it is posssible that we make mistakes, you mustn’t use any of our statements without verification. Please, inform us of any error or misunderstanding you come about, so we can identify and eliminate it as soon as possible.

Carry out your work on or with W&T products only to the extent that they are described here and after you have completely read and understood the manual or guide. We are not liable for unauthorized repairs or tampering. When in doubt, check first with us or with your dealer.

Page 3

W&T

Introduction

The Com-Server models 58631, 58641, 58633, 58031, 58034, 58231, 58431, 58432 58331 and 58334 represent a uniform platform for linking serial interfaces such as RS232, RS422/485 to TCP/IP networks.

In addition to all the standard applications implemented in the Com-Servers, this reference manual also describes methods of integrating Com-Servers into your own applications.

Com-Server Highspeed models

Model No.

58631

58631/UL

58641

58633

58031

58034

58231

58431

58432

58331

58334

Supply voltage

12 - 24V AC/DC

12 - 24V DC

PoE or 24V AC/DC

12 - 24V AC/DC

100-250V~ 50-60Hz

5V +/-5%

Network interface

10/100BaseT autosensing

Serial interface

1 x Interface module RS232/RS422/RS485

3 x Interface module RS232/RS422/RS485

1 x Interface module RS232/RS422/RS485

4 x Interface modules RS232/RS422/RS485

1 x Interface module RS232/RS422/RS485

1 x TTL (optional RS232, RS422/485)

1 x TTL + RS485 2-wire (optional RS232, RS422)

1 x Interface module RS232/RS422/RS485

4 x Interface modules RS232/RS422/RS485

Housing

Top hat rail housing

Desktop metal housing

Compact metal housing

none (OEM)

none (OEM, credit card format)

19" version

Page 4

W&T

Content

1 Quickstart 9

1.1 Flow chart – Network installation using WuTility 10

1.2 Overview of configuration menu 11

1.3 Factory Default settings 12

2 Assigning the IP address 13

2.1 Configuring network parameters with WuTility 14

2.2 Assigning the IP using the ARP command 18

2.3 Serial assigning of IP, subnet mask and gateway 20

2.4 Assigning the IP using DHCP protocol 24

2.5 Assigning the IP using BOOTP protocol 28

2.6 Assigning the IP using a RARP server 30

3 Form factors 31

3.1 Com-Server Highspeed Industry 32

3.2 Com.Server Highspeed Isolated 58633 33

3.3 Com-Server Highspeed Office 34

3.4 Com-Server Highspeed 19“ 35

3.5 Com-Server Highspeed OEM 58431 36

3.6 Com-Server Highspeed compact 58231 37

4 Supply voltage 39

4.1 Com-Server Highspeed Industry and Isolated 40

4.2 Com-Server Highspeed Industry 58631/UL 41

4.3 Com-Server Highspeed Industry PoE 42

4.4 Com-Server Highspeed Office 43

4.5 Com-Server OEM and compact 44

4.6 Com-Server Highpeed 19“ 45

5 Interfaces and displays 47

5.1 Ethernet connection 48

5.2 RS232/422/485 combi-module 50

5.2.1 Opening the Com-Server 50

5.2.2 Mode selection 51

5.2.3 RS232 mode (factory default) 51

5.2.4 RS422/485 mode 53

Page 5

W&T

Subject to error and alteration

5.3 Interface for the OEM-Com-Server 58431 56

5.4 Option: 20mA interface 58

5.5 Interfaces for the OEM-Com-Server 58432 60

5.5 LED displays 63

6 Configuration access to the Com-Server 65

6.1 Configuration menu structure 66

6.2 Configuration via Telnet 68

6.3 Configuration via Browser - Web Based Management 71

6.3.1 Activating WBM with the WuTility-Tool 71

7 The basis configuration of the Com-Server 77

7.1 Saving your settings 78

7.2 Menu: INFO System 79

7.3 Menu: SETUP System 80

7.3.1 Menu: SETUP System r Setup TCP/IP 80

7.3.2 Menu: SETUP System r Telnet Password 83

7.3.3 Menu: SETUP System r System Password 84

7.3.4 Menu: SETUP System r System Name 85

7.3.5 Menu: SETUP System r Flash Update 85

7.3.6 Menu: SETUP System r Factory Defaults 86

7.3.7 Menu: SETUP System r Reset 86

7.4 Menu ... r TCP/IP Mode r System Options 87

8 Configuration of the serial port 89

8.1 The serial parameters (Menu: UART Setup) 90

8.1.1 Baud rate, Data bits, stop bits, parity 90

8.1.2 The handshake modes 91

8.1.3 FIFO Send/Rec 96

9 The protocol stack of the Com-Server 97

9.1 Services of the Com-Server 98

9.2 Addressing in the TCP/IP Network 99

9.3 The protocol stack of the Com-Server 100

9.3 1 Data transfer per TCP/IP and UDP/IP sockets 100

10 Data transfer per TCP/IP sockets 103

10.1 The Com-Server as TCP server 104

10.1.1 Configuration of the local port number 104

10.1.2 Optional settings 105

Page 6

W&T

10.2 The Com-Server as TCP-Client 107

10.2.1 TCP client mode with fixed destination system 108

10.2.2 TCP client mode with serial addressing 111

10.2.3 Optional settings 112

10.2.4 Deactivating TCP client mode 114

10.2.5 Application: Client/Server mode between Com-Server-Ports 114

11 Data transfer per UDP 117

11.1 The Com-Server as UDP peer 118

11.1.1 Setting the local UDP port number 119

11.1.2 UDP clientmode with fixed destination system 120

11.1.3 UDP client mode with serial addressing 121

11.1.4 Optional settings 123

11.1.5 Deactivating UDP mode 124

12 The Windows COM port redirector 125

12.1 Virtual COM ports 126

13 Box-to-Box mode 129

13.1 Box-to-Box mode 130

13.1.1 Configuring Box-to-Box mode 131

13.1.2 Optional settings 132

13.1.3 Deactivating Box-to-Box mode 132

14 Data transfer per FTP 135

14.1 The Com-Server as FTP server 136

14.2 The Com-Server as FTP client 138

14.2.1 Configuring the destination address and port no. 138

14.2.4 Deactivating FTP client mode 145

14.2.5 Application examples 145

15 Data transfer per Telnet 147

15.1 Com-Server as Telnet server 148

15.2 The Com-Server as Telnet client 149

15.2.1 Optional settings 151

15.2.2 Deactivating Telnet client mode 151

Page 7

W&T

16 IP Bus mode 153

16.1 Function of the IP Bus mode 154

16.2 Configuring the IP Bus mode 155

16.2.1 Activating the master 155

16.2.3 Deactivating IP Bus Mode 156

17 The Com-Server as SLIP router 157

17.1 Configuring the SLIP mode 158

18 Serial Socket Interface 163

18.1 Serial Socket Interface 164

19 Status and error messages 165

19.1 Menu Setup Port x r Port State 166

20 Expanded services of the Com-Server 169

20.1 The control port 170

20.2 Reset Com-Server-Port 178

20.3 Software reset of the Com-Server 180

20.4 Uploading/downloading configuration data 181

20.5 Inventory taking per UDP/8513 183

20.6 SNMP management 186

21 Firmware update of the Com-Server 187

21.1 Where do I get the current firmware? 188

21.2 Network firmware update under Windows 189

21.3 Network firmware update under UNIX 190

Appendix 193

TCP/IP under Windows 9x 194 TCP/IP under Windows NT 195 Used ports and network security 196 Serial assignment of the IP address under Windows 200 Web application HTTP, SMTP, POP3 ... 204 WuTility - Inventory and management tool 206 Hardware reset to factory defaults 207 Technical Data 208 Declaration of conformity 215

Index 216

Page 8

W&T

Page 9

W&T

Subject to error and alteration

1 Quickstart

Already experienced users of Com-Servers will find on the two following

pages a flow chart with the essential steps for start-up as well as a

complete overview of the configuration menu. Detailed information can

be found then in the following sections.

Page 10

W&T

1.1 Flow chart – Network installation using WuTility

Select site

Connect

supply voltage

Com-Server Windows PC

with TCP/IP

WuTility

installed?

yes

Connect

network cable

Finish

Network

Obtain IP-

address, subnet

mask, gateway

address

Install

WuTility with

product CD

Button:

IP address

Enter IP address

subnet mask,

gateway

Start

WuTility

Select

device in

inventory list

Com-Server

with PoE?

yes

Page 11

W&T

Subject to error and alteration

1.2 Overview of configuration menu

SETUP System Setup TCP/IP

Telnet Password System Password System Name Flash Update Factory Defaults Reset

Link Speed (Auto, 10/100BT, HD/FD) SETUP Port 0

SETUP Port 1 SETUP Port 2 SETUP Port 3

SAVE Setup

TCP Client

UDP Client

Serial Socket Interface

Telnet Client

FTP Client

Box to Box (TCP)

IP Bus Mode

SLIP Router

System Options

Server Port Server IP/URL Special Options

Port State

UART Setup

TCP/IP Mode

Connection State Error State Clear Port Mode Baud

Parity

Data Bits

Stopbit

Handshake

FIFO S/R:

Standard Baudrates Special Baud Divisor

230,4k 172,8k 115,2k 57600 38400 19200

9600

4800

2400 1200 600 300 150 110 757200 50

NONE

EVEN ODD

None

Hardware

Software Special

Pin: RTS Pin: DTR Pin: CTS Pin: DSR XON/XOFF XON/XOFF (Filter)

FIFOs OFF FIFOs ON

disable 8/8 16/16 32/56 56/60

Local Port TCP/UDP Inactivity Timeout

Connect. Timeout Disconnect Char Dispatch String 1 Dispatch String 2 Client: "C"+Addr Response Mode

Server Port Server IP/URL Special Options

Serial Coding

Serial Protocol

Dispatch String 1 Dispatch String 2

Client: "C"+Addr

Disconnect Char

Write: "C"+Addr

Serial Protocol Serial Coding Protocol Char

Server Port Server IP/URL Special Options

Disconnect Char Inactivity Timeout Serial 0d -> 0d00

Server Port (21) Server IP Special Options

Auto FTP FTP Client Login Inactivity Timeout Connect. Timeout Protocol Char

Server Port Server IP/URL Special Options

Server Port (21) Server IP Special Options

Dispatch String 1 Dispatch String 2

Slave: Master IP Master: Subnet IP

Net Address SLIP-Net Routing

Network Delay Flush Buffer Telnet Echo

(Highspeed Serial)

Logout

Retransm. Timeouts

INFO System Cable Type

MAC address

SOFTW Date/REV

HARDW Rev

Run Time

IP-Address Subnet Mask

Gateway

MTU (560-1460)

BOOTP Client

Keep Alive Time

Standard Gateway

Route 1 Route 2 Route 3 Route 4

Destination Netmask Gateway

WBM Port

DNS Server

DHCP Client

Control Port TCP

To activate the new settings

always save using SAVE Setup

with Telnet or the LOGOUT

link on the webpages

Page 12

W&T

1.3 Factory Default settings

The list contains an overview of the most important settings. For many applications, such as the W&T COM Port Redirector, no additional configurations need to be made besides assigning the network base parameters. Detailed information on the respective parameters can be found in later sections of this manual.

Network settings

Hardware connection: Auto negotiating IP address: 0.0.0.0 Gateway address: 0.0.0.0 Subnet mask: 255.0.0.0 DNS server: 0.0.0.0 DHCP: Active

To prevent unintended address assignments or changes,

we recommend deactivating the DHCP, BOOTP and RARP

protocols if they are not expressly used in the respective network environment.

Serial settings

Hardware connection: RS232 Baud rate: 9600 Data bits: 8 Parity: NO Stop bits: 1 Handshake: Hardware (RTS/CTS) FIFO: OFF

Configuration access

Per Telnet using TCP port 1111

Network applications/Operating modes

TCP sockets (Port A...D): 8000, 8100, 8200, 8300 Telnet (Port A...D): 6000, 6100, 6200, 6300 FTP (Port A...D): 7000, 7100, 7200, 7300

Page 13

W&T

Subject to error and alteration

2 Assigning the IP address

The Com-Server is factory set to IP address 0.0.0.0. Before you can make

the entry in the Com-Server, you need to specify an IP address that is valid

for your network. You system administrator will provide you with this. If

you have only a small network with no routing, use the IP address of your

PC and simply change the last digit. The IP address must be unique within

the network!

. Assigning IP address, subnet mask and gateway address

using WuTility management tool

. Using the ARP command

. Assigning IP address, subnet mask and gateway address

through the serial port

. Using the RARP protocol

. Assigning IP address, subnet mask and gateway using

DHCP/BOOTP protocol

Page 14

W&T Assigning the IP address

2.1 Configuring network parameters with WuTility

The Windows tool WuTility version 3.0 and higher allows not only inventorying of Com-Server and Web-IO installations, but also convenient assignment of the following network-side basic parameters:

• IP address

• Subnet mask

• Gateway address

• Activating/deactivating BOOTP/DHCP

• Activating/deactivating Web-Based-Management

Assigning requires that the PC and Com-Server be in the same subnet. In firmware revision 1.45 the function is independent of the current address settings in the Com-Server, i.e. even changes to parameters not matching the network are easily made. Any system password which has been set must however in this case be known.

Downloading and installing WuTility

The most current version can always be found at our Web site under the following address:

http://www.wut.de

From there use the menu tree on the left side to navigate:

Products & Downloads r Com-Servers r Software Tools

After unzipping the ZIP file, begin installation by doubleclicking on the file setup_us.exe. WuTility is started from

Start r Programs r W&T Software Toolkit r WuTility

Starting the assignment dialog

First be sure that both the Com-Server and the computer you are using are connected to the same network and are in the same subnet. When started, WuTility automatically searches the

Page 15

W&T Assigning the IP address

Subject to error and alteration

local network for connected W&T network devices and creates an inventory list. This search process can be repeated manually as often as desired by clicking on the Scan button:

Within the inventory list you can identify the desired Com-Server based on its MAC address. For initial installations its IP address is 0.0.0.0.

Select the Com-Server and click on the IP address button:

Enter the desired values for IP address, subnet mask and gateway address in the corresponding fields and then click on the Next button.

Page 16

W&T Assigning the IP address

In the following window you can activate the BOOTP client and the Web-Based-Management of the Com-Server.

To prevent unintended address assignments or changes,

we recommend deactivating the DHCP, BOOTP and RARP protocols if they are not expressly used in the respective network environment. Com-Servers with incorrectly assigned IP addresses can be easily found after the fact using the scan function of the WuTility management tool and reconfigured.

Clicking on the Next button assigns the network parameters to the Com-Server. All columns in the WuTility device list are filled with information.

This concludes the network-side startup of the Com-Server, and for many applications – such as use together with the COM Port Redirector – no further settings are necessary. Special modes or serial parameters can be set using the telnet configuration menu or, if Web-Based-Management was used, with the help of the Internet browser. To do this, click on either the Telnet or

Browser button:

Telnet:

Browser:

Page 17

W&T Assigning the IP address

Subject to error and alteration

Changing network parameters is protected by the

system password. To prevent improper access, we recommend assigning a system password for any Com-Servers in use.

Additional information can be found in the section Configuration Accesses for the Com-Server.

Page 18

W&T Assigning the IP address

2.2 Assigning the IP using the ARP command

This method can only be used if the Com-Server does not already have an IP address, i.e. the entry is

0.0.0.0. To change an IP address, use one of the other methods described in this section or use the configuration menu over Telnet.

Required is a computer which is located in the same network segment as the Com-Server and which has TCP/IP protocol installed. Read off the Ethernet address of the Com-Server from the sticker on the side of the housing:

58xxx [Model]

EN=00c03d004a05

OK xxxxxx

Ethernet address

Insert a static entry into the ARP table of the computer using the following command line:

arp -s [IP address] [MAC address]

e.g. under Windows:

arp -s 172.16.231.10 00-C0-3D-00-12-FF

e.g. under SCO UNIX:

arp -s 172.16.231.10 00:C0:3D:00:12:FF

Next use the following command line under Start r Run to start a Telnet session on the configuration port of the ComServer with the desired IP address:

telnet 172.16.232.10 1111 [

Return

]

The IP addresses must be without leading zeros in

all Windows environments. Otherwise the entry is incorrectly interpreted by the system and an incorrect IP address is assigned to the Com-Server.

The IP address must be unique within the network.

Older Windows systems only accept a static entry if there is a dynamic one already present. Here you should first ping another network station.

Page 19

W&T Assigning the IP address

Subject to error and alteration

The Com-Server takes the IP address of the first network packet sent to it as its own and saves it in non-volatile memory. The Telnet connection will be established and the configuration menu is displayed in the Telnet window. All further settings are made here (see Basic configuration of the Com-Server).

Page 20

W&T Assigning the IP address

2.3 Serial assigning of IP, subnet mask and gateway

After a Com-Server reset a time window of around 1-2 seconds is available, during which you can assign a new IP address, subnet mask and gateway address by entering at least 3 „x“.

In contrast to the ARP method described above, this

serial method functions regardless of whether the Com-Server already has an IP address or not. The procedure can be repeated as often as desired. Therefore use this method if you don‘t know the IP address or have forgotten it. Appendix D contains the detailed procedure under Windows using HyperTerminal.

First connect the serial port A of the Com-Server to a computer. For a standard PC or laptop, you will need a

crossed RS232 cable (=Null modem cable, see RS232 interface).

The serial transmission parameters of the terminal program you use should be set to 9600 baud, no parity, 8 bits, 1 stop bit, no handshake. Reset the Com-Server by interrupting the power. When the green status LED lights up, enter the letter „x“ at least three times on the terminal, until the Com-Server returns the prompt IPno.+<Enter>.

Use the usual format (xxx.xxx.xxx.xxx) to enter the IP address, and end the entry by pressing <Enter>. If the entry was accepted, the acknowledgement is the assigned IP address. Otherwise you will get a FAIL message followed by the last current IP address.

All other settings such as gateway address, subnet mask etc. are done through the Telnet configuration menu (see Basic configuration of the Com-Server).

Page 21

W&T Assigning the IP address

Subject to error and alteration

2.3.1 Assigning of subnet mask and gateway address

Together with the IP address, the subnet mask and gateway address can also be assigned serially. The entry is separated by commas and follows the IP address. Entering as shown in the following example will assign IP address 172.17.231.99, subnet mask 255.255.255.0 and gateway 172.17.231.52 to the Com-Server

IP no.+<ENTER>: <- Com-Server

172.17.231.99,255.255.255.0,172.17.231.52 -> Com-Server

172.17.231.99,255.255.255.0,172.17.231.52-1 <- Com-Server

2.3.2 Deactivating DHCP/BOOTP/RARP

The DHCP/BOOTP/RARP function of the Com Server can be turned off as part of assigning the IP address serially. We recommend making use of this at all times except where use of DHCP, BOOTP or RARP is expressly required. To deactivate the DHCP/BOOTP/RARP client enter the option „-0“ (zero) directly appended (no space!) to the IP address and confirm with <Enter>.

• -0

DHCP, BOOTP and RARP = OFF

• -1

DHCP = OFF, BOOTP and RARP = ON

• -2

DHCP = ON BOOTP and RARP = OFF

Example: Deactivation of DHCP, BOOTP and RARP

xxx - > Com-Server IP no.+<ENTER>: <- Com-Server

172.17.231.99-0 - > Com-Server

172.17.231.99 <- Com-Server

An explanation of the basic terms and concepts for addressing in the internet and using DHCP and BOOTP can be found in our manual TCP/IP- Ethernet and Web-IO.

Page 22

W&T Assigning the IP address

This function can later be reactivated through the Telnet configuration under SETUP System r SETP TCP/IP r BOOTP Client.

To prevent unintended address assignments or changes,

2.3.3 Serial activation of Web Based Management

To further configure the Com-Server you can use either Telnet protocol or an Internet browser, although only Telnet is an option in the Com-Server as shipped from the factory. You can activate Web Based Management as part of the serial IP assignment. To do this, enter +w[Portno.] directly after the IP address or address string. Here Portno. is the desired TCP port in decimal format.

Example 1: Deactivating DHCP/BOOTP/RARP and activating Web Based Management on TCP port 8080.

xxx - > Com-Server IP no.+<ENTER>: <- Com-Server

172.17.231.99,255.255.0.0,172.17.231.52-0+w8080 -> Com-Server

172.17.231.99,255.255.0.0,172.17.231.52-0+w8080 <- Com-Server

Example 2: Activation of Web Based Management on TCP port

80. The status of DHCP/BOOTP/RARP remains unchanged.

xxx - > Com-Server IP no.+<ENTER>: <- Com-Server

172.17.231.99+w80 -> Com-Server

172.17.231.99- 1 < - Com-Server

Page 23

W&T Assigning the IP address

Subject to error and alteration

For additional information on activating Web Based

Management, see section Configuration via Browser

Web Based Management.

Page 24

W&T Assigning the IP address

2.4 Assigning the IP using DHCP protocol

Many networks use DHCP (Dynamic Host Configuration Protocol) or its predecessor described in the following section for centralized and dynamic assignment of the network parameters. DHCP protocol is activated by the factory default settings, so that in network environments dynamic IP assignment is sufficient for connecting the Com-Server to the network. The following parameters can be assigned using DHCP:

• IP address

• Subnet mask

• Gateway address

• DNS server

• Lease time

To prevent unintended address assignments or changes,

2.4.1 Activating/Deactivating DHCP

The factory default setting is for DHCP protocol active. To deactivate it or to enable it again later, use one of the following options.

• Management-Tool WuTility

Select the desired Com-Server in the device list and click on the IP Address button. In the first dialog box enter the newly assigned network parameters and then click on Continue. In the following dialog BOX deactivate the options BOOTP and DHCP.

Page 25

W&T Assigning the IP address

Subject to error and alteration

Clicking on Continue then sends the new configuration data to the Com-Server.

• Serial port

As part of serial IP assignment, the following options for deactivating/activating DHCP and BOOTP can be selected directly following the address string:

-0 r Deactivates DHCP and BOOTP

-1 r Activates BOOTP/RARP

-2 r Activates DHCP A detailed description of the procedure can be found in the section on Serial assignment of IP, subnet mask and gateway.

• Telnet or Web Based Management

From the menu branch SETUP System r Setup TCP/IP r DHCP/ BOOTP Client the protocols can be alternately activated and

both deactivated. For detailed information refer to the section Menu: SETUP System.

2.4.2 System Name

To support any automatic updating of the DNS system by the DHCP server, the Com-Server identifies itself within the DHCP protocol with its system name. The factory default setting for this is COMSERVER_ followed by the last three places of the Ethernet address. For example the factory set system name of a Com-Server with the Ethernet address 00:c0:3d:01:02:03 is COMSERVER_010203. The system name of the Com-Server can be changed in the configuration. For additional information refer to the section Menu: SETUP System r System Name.

Page 26

W&T Assigning the IP address

2.4.3 Lease-Time

The lease time determined and transmitted by the DHCP server specifies the Time-To-Live of the assigned IP address. After half the lease time has expired, the Com-Server attempts to extend the time for the assigned DHCP server and up update the address. If this is not possible by the time the lease time expires, for example because the DHCP server can no longer be reached, the Com-Server deletes the IP address and starts a new cyclical search for alternate DHCP servers for the purpose of assigning a new IP address.

Because of the absent clock, the lease time associated with the current IP address is no longer available after a reset. After the restart therefore a corresponding update request is issued with the original DHCP server. If the latter is not resolvable at this point in time, the Com-Server deletes the IP address and starts a new cyclical search for alternate DHCP servers.

If DHCP is activated, the remaining lease time together with the current IP address is displayed in the menu item SETUP System

r Setup TCP/IP r IP-Address using the format hh:mm:ss.

If after the assigned lease time has expired the DHCP

server is not reachable, the Com-Server deletes its IP address. All existing TCP/UDP connections between the ComServer and other network clients are thereby closed. To prevent such events, we recommend configuring the assigned lease time in the DHCP server to infinite if possible.

Page 27

W&T Assigning the IP address

Subject to error and alteration

2.4.4 Reserved IP addresses

If the Com-Server is used as a TCP server or UDP peer, it provides services which other clients in the network can also make use of as needed. To open a connection, they of course need the current IP address for the Com-Server, so that in such situations it makes sense to reserve a particular IP address for the Com-Server on the DHCP server. This is generally done by linking the IP address to the unique Ethernet address of the Com-Server, which can be found on the sticker attached to the housing.

58xxx [Typ]

EN=00c03d004a05

OK xxxxxx

Ethernet-Adresse

2.4.5 Dynamic IP addresses

Fully dynamic address assignment, whereby the Com-Server gets a different IP address every time it is restarted or after the lease time has expired, only makes sense in network environments with automatic cross-connection between the DHCP and DNS services. This means when a new IP address is assigned to the Com-Server, the DHCP server then automatically updates the DNS system as well. The new address is associated with the respective domain name. If in doubt, consult your system administrator for detailed information about your network environment.

If the Com-Server is configured as a TCP or UDP client and itself actively searches for a connection to server services in your network, dynamic changing IP addresses may be used.

Page 28

W&T Assigning the IP address

2.5 Assigning the IP using BOOTP protocol

Many networks use BOOTP as predecessor of DHCP protocol for centralized and dynamic assignment of IP addresses. The factory default setting is for BOOTP turned off. You can activate it from SETUP System r SETUP TCP/IP r BOOTP Client. The following parameters can be assigned:

• IP address

• Subnet mask

• Gateway address

• DNS server

To prevent unintended address assignments or changes,

2.5.1 Address reservation

BOOTP protocol is based on fixed reservations of fixed IP addresses for particular Ethernet addresses. This means a ComServer connected to the network only gets an IP address if the latter was previously stored in the BOOTP server. Check with your system administrator for creating this reservation. The Ethernet address of the Com-Server can be found on the housing sticker.

58xxx [Model]

EN=00c03d004a05

OK xxxxxx

Ethernet address

Once the administrator has made the necessary entries, the Com-Server obtains the desired IP address automatically after

Page 29

W&T Assigning the IP address

Subject to error and alteration

each reset. To ensure accessibility of the Com-Server even should the BOOTP server go down, the previous IP address is retained should there be no reply.

Page 30

W&T Assigning the IP address

2.6 Assigning the IP using a RARP server

UNIX environments especially use RARP protocol for centrally assigning IP addresses. TCP/IP devices that want to obtain an IP address send RARP requests with their Ethernet address as a broadcast over the network.

RARP protocol is coupled to BOOTP protocol in the Com-Server. Activate it from SETUP System r SETUP TCP/IP r BOOTP Client.

Activate the RARP server, and enter the Ethernet address of the Com-Server in the file /etc/ethers and the IP address in the file /etc/hosts.

58xxx [Model]

EN=00c03d004a05

OK xxxxxx

Ethernet address

The Com-Server must be connected to the network in the same segment as the RARP server.

Example:

Your Com-Server has the MAC address EN= 00C03D0012FF (sticker on the unit). You want to give it IP address

172.16.231.10 and the alias name WT_1:

• Entry in the file /etc/hosts:

172.16.231.10WT_1

• Entry in the file /etc/ethers:

00:C0:3D:00:12:FF WT_1

To prevent unintended address assignments or changes,

Page 31

W&T

Subject to error and alteration

3 Form factors

. Industry model

. Isolated model

. Office models

. 19“ models

. OEM models

. Compact model

Page 32

W&T Form factors

3.1 Com-Server Highspeed Industry

Front view 58631, 58631/UL, 58641

Serial Port

Power

Network

Status

Error

Bottom side 58631, 58631/UL, 58641

12-24V AC/DC (for details see section Supply voltage)

Screw terminal supply voltage:

Page 33

W&T Form factors

Subject to error and alteration

3.2 Com.Server Highspeed Isolated 58633

Frontview 58633

Power

Network

Status

Error

Serial Port A

Serial Port B

Serial Port C

Bottom Side 58633

Supply voltage 12-24V =/~

Screwterminal

Page 34

W&T Form factors

3.3 Com-Server Highspeed Office

Front view 58031

Power

Com-Server Highspeed Office

10/100 MBit

#58031

W&T

www.wut.de

Serial Port A

Status Error

Port

Front view 58034

Power

D C B A

Status Error

Port

Serial Port D

Serial Port C Serial Port B Serial Port A

Com-Server Highspeed Office

10/100 MBit

#58034

W&T

www.wut.de

Back view 58031, 58034

Reset

Network

Supply voltage

Page 35

W&T Form factors

Subject to error and alteration

3.4 Com-Server Highspeed 19“

58331 / 8TE

58334 / 12TE

= check ser. data format

Status LED

Error LED

off1x2x

= OK

= check network

= check ser. handshake

on = self test / update

offonblink

flash

= standby

= error

= connection

= data

Power

Reset

Port A

Port B

Port C

Port D

Serial Port A

W&T

www.wut.de

Com-Server

#5833x

10/100BaseT

Serial Port B Serial Port C Serial Port D

Page 36

W&T Form factors

3.5 Com-Server Highspeed OEM 58431

95,8mm

71,1mm

17,2mm

56,23mm

D=4mm

92,13mm

64,48mm

3,7mm

20,38mm

D=3,5mm

Optional serial module: RS232/422/485 RS232 RS422/485

J1 J2

Page 37

W&T Form factors

Subject to error and alteration

3.6 Com-Server Highspeed compact 58231

Status Error

Power

Serial Port

off 1x 2x 3x on

= check network = check ser. data format = check ser. handshake = self test / update

= OK

on blink flash

= standby = error = connection = data

off

W&T

www.WuT.de

Status LED

Error LED

Com-Server

#58231

Frontview Backview

Page 38

W&T Form factors

Page 39

W&T

Subject to error and alteration

4 Supply voltage

. Industry and isolated model

. PoE - Power over Ethernet

. Office models

. 19“ models

. OEM models

. Compact model

Page 40

W&T Supply voltage

4.1 Com-Server Highspeed Industry and Isolated

• Models: 58631, 58633

The supply voltage for models 58631 and 58633 can be brought in on the adjacent screw terminals on the underside of the housing. DC voltage of any polarity or AC voltage may be used. The reverse polarity protection results in the following various maximum and minimum values for the supply voltage:

• AC: 9Vrms (- 10%) - 30Vrms (+10%)

• DC: 12V (-10%) - 48V (+10%)

If the supplied AC adapter for office applications is used, the connector pins can be connected to the screw terminals. The current draw of each model is indicated in the technical appendix.

Fuse

The supply voltage for the 58631 Com-Server is protected against overcurrent by an integrated fuse. Since this component is a safety-relevant part, always replace it with an identical type:

Manufacturer:Littelfuse Model: Nano SMD Fuse, Series 451 Type: 1A / 125V, Art.-No. 451 001

Page 41

W&T Supply voltage

Subject to error and alteration

4.2 Com-Server Highspeed Industry 58631/UL

• Models: 58631/UL

The supply voltage for model 58631/UL is brought in through a screw terminal located on the bottom of the housing. DC voltage of any polarity may be used. The polarity reversal protection results in the following maximum and minimum values for the supply voltage:

• DC voltage: 12V (-10%) - 24V (+10%)

If the AC adapter supplied is used, the connector pins may be connected to the screw terminals.

When power is provided by a third-party power supply, it must meet the requirements for Limited Power Sources (LPS) in accordance with NEC Class 2. The current draw can be found in the technical appendix.

Fuse

The supply voltage for the 58631/UL Com-Server is protected against overcurrent by an integrated fuse. Since this component is a safety-relevant part, always replace it with an identical type:

Manufacturer:Littelfuse Model: Nano SMD Fuse, Series 451 Type: 1A / 125V, Art.-No. 451 001

Page 42

W&T Supply voltage

4.3 Com-Server Highspeed Industry PoE

• Models: 58641

The model 58641 Com-Server is designed for use in PoE (Power-over-Ethernet) environments in accordance with IEEE802.3af. Power is provided by the network infrastructure using the RJ45 terminal. The Com-Server supports both phantom power using data pairs 1/2 and 3/6 as well as power feed using the unused wire pairs 4/5 and 7/8.

To enable power management for the supplying components, the Com-Server is identified as a Power Class 1 device with a power consumption of 0.44 to 3.84W.

As an alternative to PoE power supply, the 58641 Com-Server can also be powered by an external power supply connected to the screw terminals on the underside of the housing. DC voltage of any polarity as well as AC voltage may be used. This polarity reversal protection results in the following maximum and minimum values for the power supply:

• AC: 18Veff (- 10%) - 30Vrms (+10%)

• Gleichspannung: 24V (-10%) - 48V (+10%)

Use of the model 58641 Com-Server is also possible in

networks without PoE power supply. In this case simply use an external power supply attached to the screw terminal as described above. No additional configurations or settings are necessary.

Page 43

W&T Supply voltage

Subject to error and alteration

4.4 Com-Server Highspeed Office

• Models: 58031, 58034

The office models 58031 and 58034 include an integrated wide-range power supply for an AC voltage of 100-250V/5060Hz. Mechanically the connection is made via a cold-device cable.

The current draw of each model is indicated in the technical appendix.

Page 44

W&T Supply voltage

4.5 Com-Server OEM and compact

• Models: 58431, 58432, 58231

58231, 58431

The supply is brought in on a mains receptacle for hollow pin plugs located in the edge of the board. The feed voltage must be 5V ±5%.

Pin jack 5,5mm Polarity: inner = GND

outer = +5V

58432

The supply voltage is brought in through one of the two post connectors that are used for the serial signals as well. Supply voltage has to be 5V +/-5%.

Pin 1 = +5V Pin 10 = GND

Pin 1 = GND Pin 12 = +5V

34567

712

The current draw is indicated in the technical appendix.

Page 45

W&T Supply voltage

Subject to error and alteration

4.6 Com-Server Highpeed 19“

• Models: 58331, 58334

The Com-Server Highspeed 19" models get their supply voltage through the 96-pin VG connector:

c b a

132

Component side of board

Slots for serial ports

Row 1

Row 5

Jumper a

Jumper b

Jumper c

Jumper area

5V 5V GND GND 12V

Alternat supply voltage also possible through the 6-pin terminal strip, RM 3,96

Example for VME-Bus J2:

Row 1

Row 5

Jumper a

Jumper b

Jumper c

Use the following table to determine how jumpers a-c in the corresponding row depending on which bus system is used.

Page 46

W&T Supply voltage

Jumper

Row 1

Row 2

Row 3

Row 4

Row 5

32c

31c

29a

31c

n.c.

13a

Com-ServerPin VG strip

GND

+5V

+12V

Standard (all three jumpers of row closed)

VME-Bus J1

VME-Bus J2

Multibus II

ECB Bus

BUS7ISA

For standard operation of the Com-Server only the 5V

supply is needed. The 12V voltage is simply brought through a fuse to Pin 11 on the module slots where it is used to supply future interface modules.

Page 47

W&T

Subject to error and alteration

5 Interfaces and displays

. Ethernet interface

. Serial interfaces and options

. LED displays

Page 48

W&T Interfaces and displays

5.1 Ethernet connection

All Com-Server models incorporate an IEEE 802.3-compatible network interface on a shielded RJ45 connector. The pin assignments correspond to an MDI port, so that the connection to the hub or switch is accomplished using a 1:1 shielded patch cable. The OEM model 58432 can also be optionally equipped with an LSA-Plus no-strip connect terminator module.

1 2 3 4 5 6 7 8

Direction

Out

Models withpout PoE

Tx+

Tx-

Rx+

Rx-

ncv

Models with PoE

Tx+

Tx-

Rx+

Vcc positive

Rx-

Vcc negative

Power-over-Ethernet

The model 58641 Com-Server 58641 can obtain power as defined in IEEE802.3af/Power-over-Ethernet. Either the data pairs or the unused wire pairs in 10/100BaseT may be used (see also the section Supply Voltage).

Auto Negotiation: 10/100BaseT, Full/Half Duplex

All Com-Servers are factory set to operate in Auto-Negotiation mode on the network side. The data transmission speed and duplex are automatically negotiated with the connected switch/ hub and set accordingly.

In addition to the Auto-Negotiation mode, both the Com-Servers as well as many switches can be configured for fixed transmission parameters with respect to speed and duplex. To prevent communications problems (duplex mismatch), only the following two combinations are permissible:

Page 49

W&T Interfaces and displays

Subject to error and alteration

• Both parties (switch and Com-Server) are operated in Auto-

Negotiation mode.

• Both parties are configured for the same (fixed)

transmission speeds and duplex mode.

Activating/deactivating Auto-Negotiation

Use menu sequence Setup System r Link Speed to switch between Auto-Negotiation and fixed transmission speeds/ duplex mode.

Galvanic isolation

The network connection is galvanically isolated with respect to the supply voltage as well as the serial interface(s) for at least 500V

rms

Link-Status

The current link status is indicated by the Error LED on the device front panel: Flashing at a rate of 1-2 seconds indicates that there is no connection to the hub or that the connection is faulted.

Managable switches often have special protocols

(spanning tree, port trunking, ...) as required for example for uplinks to other switches or broad-band connection of servers. These protocols are not generally required for connecting a normal terminal device such as the Com-Server, and they do under some circumstances significantly delay opening of communication after a new start. We recommend deactivating these protocols and functions on the port used for the Com-Server. Please consult here with the responsible network administrator.

Page 50

W&T Interfaces and displays

5.2 RS232/422/485 combi-module

Com-Server models 58631, 58633, 58031, 58034, 58331, 58334 and 58231 come standard with an RS232/422/485 multi-port whose modes are described below.

The ports on the Com-Server 58633 are also galvanically isolated from each other and with respect to the supply voltage with a dielectric strength of 1kV.

All external signal lines use ESD-immune interface components to provide protection against static discharges of up to 15kV per IEC 801-2, Level 4.

The OEM models 58431 and 58432, which are intended for integration into existing systems, are equipped with a serial TTL interface (= UART interface).

5.2.1 Opening the Com-Server

To open the Com-Server, plug the DB9 connector into the serial port. After tightening the two mounting screws, pull on the DB9 plug to remove the circuit board from the housing..

The office versions can be opened by removing the four upper screws on the enclosure sides.

In the case of the compact version 58231, the bump guard on the housing side with the serial port must first be removed. This reveals four screws, which are removed in order to remove the circuit board from the housing.

Equipping Com-Servers with interface modules other than those already installed is a modification which must be performed only by W&T.

Page 51

W&T Interfaces and displays

Subject to error and alteration

5.2.2 Mode selection

Switching between the modes is accomplished using the internal DIL switches located on the respective interface module. The following table shows an overview of all modes:

SW5

OFF

Mode

RS232

(1)

RS422, RS485 4-wire bus master

RS485 4-wire automatic control

RS485 2-wire automatic control

SW1

OFF

SW2

OFF

SW3

OFF

SW6

OFF

SW7

OFF

SW8

OFF

SW4

OFF

(1) Factory default

5.2.3 RS232 mode (factory default)

The pin configuration of the RS232 port is identical to that of a PC, which allows you to use standard cables. Be sure that the Com-Server port and that on the serial terminal device are configured for the identical transmission parameters and handshake procedure.

DIP switch setting

SW5

OFF

Mode

RS232

SW1

OFF

SW2

OFF

SW3

OFF

SW6

OFF

SW7

OFF

SW8

SW4

OFF

The terminating DIL switches SW6 and SW7 must never be in the ON position when using the module in RS232

mode. This will result in a significant increase in the current draw and may cause the RS232 driver to fail.

Page 52

W&T Interfaces and displays

Pin assignment and function RS232, DB9

Direction

(IN)

OUT

---

OUT

(IN)

Signal

NC/DCD

RxD

TxD

DTR

GND

DSR

RTS

CTS

NC/RI

Description

Data carrier detect

Receive Data

Transmit Data

Data Terminal Ready

Signal Ground

Data Set Ready

Ready To Send

Clear To Send

Ring indicator

Default Funktion (1)

1-port models: Not connected 4-port models: Ignored

Data in

Data out

12V for existing TCP connection to a client or server

---

ignored

Handshake output +12V = ready to receive data

- 12V = not ready to receive data

Send data only at +3...12V

1-port models: Not connected 4-port models: Ignored

(1) Applies only to the hardware handshake setting

Wiring examples

Com-Server <> PC, 25-pin

W&T Art. No. 1179x

1 2 3 4 5 6 7 8

20 2 3 6 7 8 5 4

DB25/female

DB9/female

Com-Server <> PC, 9-pin

W&T Art. No. 1199x

1 2 3 4 5 6 7 8

4 3 2 1 5 6 8 7

DB9/female

Com-Server -> printer

W&T Art. No. 1189x

2 3 4

5 6 8

2 3 5 6 7 20

DB25/male

DB9/female

Com-Server <> modem

W&T Art. No. 1198x

1 2 3 4 5 6 7 8 9

8 3 2 20 7 6 4 5 22

DB25/male

DB9/female

Page 53

W&T Interfaces and displays

Subject to error and alteration

5.2.4 RS422/485 mode

As opposed to RS232, an RS422 interface allows transmission distances of up to 1000 meters. The RS485 mode allows you to integrate corresponding 2- or 4-wire bus sytems into a TCP/IP network with the help of the Com-Server.

Especially when using longer cable lengths in

industrial environments, potential differences need to be taken into consideration. To prevent any resulting transmission problems or hardware damage, recommended use of the Com-Server Highspeed Isolated 58633, which has three galvanically isolated serial ports. Alternately the galvanic isolation can be achieved by means of an external isolator (e.g. W&T RS422/485-Isolator Model 66201).

DIP switch setting

SW5

Mode

RS422, RS485 4-wire bus master

RS485 4-wire automatic control

RS485 2-wire automatic control

SW1

OFF

SW2

OFF

SW3

OFF

SW6

SW7

SW8

OFF

SW4

OFF

Pin assignment and function RS422/485, DB9

Direction

OUT

---

OUT

Signal

TxD A/-

RxD A/-

RTS A/-

CTS A/-

GND

TxD B/+

RxD B/+

RTS B/+

CTS B/+

Description

Transmit Data A

Receive Data A

Ready To Send A

Clear To Send A

Signal Ground

Transmit Data B

Receive Data B

Ready To Send B

Clear To Send B

Default function (1)

Data output

Data input

Handshake output

Handshake input

---

Data output

Data input

Handshake output

Handshake input

(1) with factory default setting

Page 54

W&T Interfaces and displays

Modes

The DIL switches are used to set the following modes:

• RS422, RS485 4-wire bus master

Provides one data and handshake channel each in each direction. The RS422/485 drivers and receivers are always active in this mode.

• RS485 4-wire with automatic control

One data channel is available in each direction. The RS485 driver chip is automatically activated each time data is sent out and then disabled when data is finished sending. The receive channel is always active in this mode.

• RS485 2-wire bus with automatic control

Handshake for RS485 modes

RS485 bus systems do not use flow control in the traditional sense for data integrity, but rather a logical protocol. The handshake procedure for the Com-Server must therefore be set to NO (see The serial parameters (Menu: UART Setup).

Terminating

All RS485 modes require a termination network on the bus ssytem which ensures a defined rest state in the high-ohmic phases of bus operation. Connection of the bus system with a termination network can be done in the interface by closing the DIP switches 6 and 7 on the module:

Page 55

W&T Interfaces and displays

Subject to error and alteration

330O 330O120O

+5V

SW6

SW7

Data In B

Data In A

Wiring examples

RS422 connection with hardware handshake

Com-Server

RS422/485

Data Out A

Data Out B

Data In A

Data In B

Handshake Out A

Handshake Out B

Handshake In A

Handshake In B

RxD A (-) RxD B (+) TxD A (-) TxD B (+) CTS A (-) CTS B (+) RTS A (-) RTS B (+)

1 6

2 7

3 8 4

RS422

device

RS485 connection (4-wire bus master)

Com-Server

RS422/485

Data Out A

Data Out B

Data In A

Data In B

Handshake Out A

Handshake Out B

Handshake In A

Handshake In B

1 6

2 7

3 8 4

RxD A (-) RxD B (+) TxD A (-) TxD B (+)

RS485

device

RxD A (-) RxD B (+) TxD A (-) TxD B (+)

RS485

device

RS485 connection 2-wire

Com-Server

RS422/485

Data Out A

Data Out B

Data In A

Data In B

Handshake Out A

Handshake Out B

Handshake In A

Handshake In B

1 6

2 7

3 8 4

Bus A (-) Bus B (+)

RS485

device

Bus A (-) Bus B (+)

RS485

device

Page 56

W&T Interfaces and displays

5.3 Interface for the OEM-Com-Server 58431

The OEM model 58431 has a UART interface that operates at TTL levels, which is implemented on a 2mm square post header. As an option, interface modules for RS232, RS422/ 485 or the multi-port can be connected.

RJ45

LEDs

Wiring assignment for the OEM model 58432 „credit

card format“ differ from those described here. For this

model please consult the belonging special section

Pin assignment and function TTL interface 58431

Signal

RxD

TxD

Reset (1)

CTS

DTR

DSR

RTS

GND

Function

Vcc

---

Data in

Data out

Reset in-/output

Input

Output

Input

Output

---

Signal ground

(1)

The open collector feature of the reset pin allows function as a LOW-active in- and output. A reset triggered for example by the watchdog in the Com Server can be used here for your own

Page 57

W&T Interfaces and displays

Subject to error and alteration

purposes. Applying a GND level for at least 100ms (using a button for example) forces a restart of the Com Server.

Page 58

W&T Interfaces and displays

5.4 Option: 20mA interface

All Com-Servers in the Highspeed series with the exception of model 58633 can be equipped optionally with 20mA interfaces instead of the RS232/422/485 combi-module.

The interface can be used as an active or passive 20mA component. In the active mode the interface supplies the current required by the respective 20mA loop, while in the passive mode the loop current must be supplied by the connected device.

Pin assignment and function 20mA, DB9

Signal

Data Out 20mA

Data Out +

Data Out -

Data Out GND

n.c.

Data In 20mA

Data In +

Data In -

Data In GND

Function

Current Out +20mA

Output

Current Out Ground

Current In +20mA

Input

Current In Ground

The operating mode can be selected for both loops seperately. Examples of interface switching into active/ passive mode are shown on the following drawings:

Page 59

W&T Interfaces and displays

Subject to error and alteration

Com-Server Tx and Rx loop active

RxD + RxD -

TxD + TxD -

Passive 20mA-

device

Com-Server Tx and Rx loop passive

Com-Server Tx loop active, Rx loop passive

Com-Server

20mA

Data Out 20mA

Data Out +

Data In -

Data Out GND

Data In 20mA

Data In +

Data In -

Data In GND

1 2

3 4

6 7 8

Com-Server

20mA

Data Out 20mA

Data Out +

Data In -

Data Out GND

Data In 20mA

Data In +

Data In -

Data In GND

1 2

3 4

6 7 8

RxD + RxD -

TxD + TxD -

Active 20mA-

device

RxD + RxD -

TxD + TxD -

Avtive/passive

20mA device

Com-Server

20mA

Data Out 20mA

Data Out +

Data In -

Data Out GND

Data In 20mA

Data In +

Data In -

Data In GND

1 2

3 4

6 7 8

Page 60

W&T Interfaces and displays

5.5 Interfaces for the OEM-Com-Server 58432

The OEM model 58432 in credit card format has in addition to an RS232 interface with TTL levels an onboard RS485 interface. Both interfaces are located on the 10-pin connector X1 with the locking collar. Reconfigure using the solder jumpers on the underside of the board.

PCB bottom side

Fuse

LB8

LB5

LB7

LB6

LB9

PCB top side

RS485 termination

ON/OFF

34567

712

Pin assignment X1

Signal

+5V/+24V

RxD

TxD

RES/ (1)

CTS

DTR

DSR/A

RTS/B

GND 24V

GND 5V

Function RS232/TTL

Supply

Input

Output

In-/Output

Input

Output

Input

Output

Supply

Function RS485

Supply

(RxD)

(TxD)

(In-/Output)

(Input)

(Output)

Bus A/-

Bus B/+

Supply

(1)

The open collector feature of the reset pin allows function as a LOW-active in- and output. A reset triggered for example by the watchdog in the Com Server can be used here for your own purposes. Applying a GND level for at least 100ms (using a button for example) forces a restart of the Com Server.

Preliminary

Page 61

W&T Interfaces and displays

Subject to error and alteration

The serial TTL interface

This interface can be configured as the TTL port of a UART. The solder jumpers must be set as follows:

• LB5, LB6 = in

• LB7, LB8, LB9 = out

The RS485 interface with automatic control

The following configuration of solder jumpers establishes a 2-wire RS485 bus connection on pins 7 and 8 of X4.

• LB5, LB6 = out

• LB7, LB8, LB9 = in

The RS485 driver ship is automatically enabled each time data is sent and disabled (high impedance state) again when data output is finished. The RS485 receiving channel is deactivated when the driver is on, but is switched on when the driver is in the high impedance state.

RS485 mode requires that the bus system be terminated with a termination network which ensures a defined idle state in the high impedance phases of bus mode. If the bus system in question does not already have a termination, one can be set using (inserting) jumpers J3 and J4.

The serial TTL interface and the RS485 bus can be

used only in alternation.

Preliminary

Page 62

W&T Interfaces and displays

Basic diagram of the serial interfaces

1 2 3 4 5 6 7 8 9

+5V/+24V RxD TxD RES CTS DTR DSR / A RTS / B GND 24V GND 5V

RM2,54mm

Com-Server UART

Protective

circuit

Vcc

(internal)

RS485

Transceiver

LB5

LB6

LB7 LB8 LB9

330 Ohm

120 Ohm

330 Ohm

Vcc/5V

4,7 kOhm

Vcc/5V

Preliminary

Page 63

W&T Interfaces and displays

Subject to error and alteration

5.5 LED displays

• Power LED

Indicates supply voltage present. If the LED is not on, check for correct wiring of the power supply.

• Status LED

Flashes whenever there is activity on the serial port. Periodic flashing indicates that the port has a valid connection to another network station. The status of the serial port can also be read out using the Com-Server‘s Telnet configuration tool.

• Error LED

The Error LED uses various flashing patterns to indicate error conditions on the device or serial port. The error texts for the previous five serial faults and the associated system time (time between the last restart of the Com-Server and when the error occured) can also be read out using the Telnet configuration tool.

1 xflashing = Check network connection The Com-Server cannot receive a link pulse from a hub. Check the cable or the hub port. 2 x flashing= Check serial data format The serial port received at least one character with a parity or framing error (= parity error / framing error), or the data register of the serial receiver ship was written even though the previous character was not read out. Check the correctness of the serial parameters, the handshake procedure and the connection cable. 3 x flashing = Check serial handshake The serial connected device is not responding to the handshake stop signal set by the Com-Server and continues to send data. The result can be that the serial ring memory is overwritten and data are lost. Check the handshake configuration of the device as well as the wiring of the connection cable.

Page 64

W&T Interfaces and displays

All LEDs on = Self-test error

The self-test performed after each start or reset of the ComServer could not be correctly finished. This error can occur when you have prematurely broken off a software update and the full operating sofstware could not be transferred. The Com-Server is no longer capable of being operated in this condition. Repeat the software update over the network (see „Firmware update of the Com-Server“), and address the Com-Server using its assigned IP address. If this does not eliminate the error or should the error occur irrespective of any prior software update, please return the unit to W&T for service.

Page 65

W&T

Subject to error and alteration

6 Configuration access to the Com-Server

After completing the hardware installation and assigning the IP address,

the remaining Com-Server configuration takes place over the network.

Here either a Telnet client or, after it has been activated, an Internet

browser can be used.

. Telnet configuration under Windows

. Configuration with the Internet browser

Page 66

W&T Configuration access to the Com-Server

6.1 Configuration menu structure

The setup of the Com-Server is treelike regardless of whether the configuration is used for a Telnet client or an Internet browser. An overview of all the levels can be found in the following illustration.

Prior to configuration a valid IP address must have been already assigned to the Com-Server (see “Assigning the IP Address”). Access is then possible from virtually any computer having network access and an installed TCP/IP protocol.

A detailed description of both configuration access types, their conditions as well as the respective navigation within the menu tree can be found in the following section.

HTTP protocol and its standard port 80 are frequent

targets of Web attacks. In order not to impair data throughput of the applications and of the Com-Server, Web Based Management is therefore factory disabled. Ways of activating this as part of the startup process can be found in the section on Web Based Management.

If you exit the configuration menu by closing the Telnet connection without first invoking SAVE Setup, the original configuration is retained.

Page 67

W&T Configuration access to the Com-Server

Subject to error and alteration

SETUP System Setup TCP/IP

Telnet Password System Password System Name Flash Update Factory Defaults Reset

Link Speed (Auto, 10/100BT, HD/FD) SETUP Port 0

SETUP Port 1 SETUP Port 2 SETUP Port 3

SAVE Setup

TCP Client

UDP Client

Serial Socket Interface

Telnet Client

FTP Client

Box to Box (TCP)

IP Bus Mode

SLIP Router

System Options

Server Port Server IP/URL Special Options

Port State

UART Setup

TCP/IP Mode

Connection State Error State Clear Port Mode Baud

Parity

Data Bits

Stopbit

Handshake

FIFO S/R:

Standard Baudrates Special Baud Divisor

230,4k 172,8k 115,2k 57600 38400 19200

9600

4800

2400 1200 600 300 150 110 757200 50

NONE

EVEN ODD

None

Hardware

Software Special

Pin: RTS Pin: DTR Pin: CTS Pin: DSR XON/XOFF XON/XOFF (Filter)

FIFOs OFF FIFOs ON

disable 8/8 16/16 32/56 56/60

Local Port TCP/UDP Inactivity Timeout

Connect. Timeout Disconnect Char Dispatch String 1 Dispatch String 2 Client: "C"+Addr Response Mode

Server Port Server IP/URL Special Options

Serial Coding

Serial Protocol

Dispatch String 1 Dispatch String 2

Client: "C"+Addr

Disconnect Char

Write: "C"+Addr

Serial Protocol Serial Coding Protocol Char

Server Port Server IP/URL Special Options

Disconnect Char Inactivity Timeout Serial 0d -> 0d00

Server Port (21) Server IP Special Options

Auto FTP FTP Client Login Inactivity Timeout Connect. Timeout Protocol Char

Server Port Server IP/URL Special Options

Server Port (21) Server IP Special Options

Dispatch String 1 Dispatch String 2

Slave: Master IP Master: Subnet IP

Net Address SLIP-Net Routing

Network Delay Flush Buffer Telnet Echo

(Highspeed Serial)

Logout

Retransm. Timeouts

INFO System Cable Type

MAC address

SOFTW Date/REV

HARDW Rev

Run Time

IP-Address Subnet Mask

Gateway

MTU (560-1460)

BOOTP Client

Keep Alive Time

Standard Gateway

Route 1 Route 2 Route 3 Route 4

Destination Netmask Gateway

WBM Port

DNS Server

DHCP Client

Control Port TCP

Telnet:

Transfer the selected parameters and save all settings in non-volatile memory on the ComServer

Browser:

Transfer the selected parameters and save all settings in non-volatile memory on the ComServer

To activate the new settings

always save using SAVE Setup

with Telnet or the LOGOUT

link on the webpages

Page 68

W&T Configuration access to the Com-Server

6.2 Configuration via Telnet

A Telnet client comes standard with nearly all operating systems that support TCP/IP protocol. Under Windows 9x/ NT/2000/XP this is normally found in the Windows system directory.

The configuration menu for the Com-Server is reached through TCP port 1111. You must therefore start the connection from within the Telnet client using the corresponding parameters:

Telnet [IP address] 1111

[adress] = IP address of the Com-Server 1111 = Configuration port of the Com-Server

Under Windows 9x/NT you only need to use Start r Run telnet. Then in the submenu Network system... of the Connect menu enter as the host name the IP address of the Com-Server and as the connection port number 1111.

If the connection could be opened and no system password is assigned (= factory default setting), you will see the following menu in your Telnet window. If a system password was configured, this will be asked for in front of the menu.

Page 69

W&T Configuration access to the Com-Server

Subject to error and alteration

*************************** * Com-Server Highspeed * * COMSERVER-0A1B2C * ***************************

1. INFO System

2. SETUP System

3. SETUP Port 0 (High-Speed Serial)

4. SETUP Port 1 (High-Speed Serial)

5. SETUP Port 2 (High-Speed Serial)

6. SETUP Port 3 (High-Speed Serial)

7. SAVE Setup

INFO System, SETUP System and SAVE Setup as well as their sub-menus are the same for all Com-Server models and are described in the following section Basic Configuration of the Com-Server.

The menu items SETUP Port x are dependent of the number of serial ports on the respective Com-Server. For example, all single-port versions will only provide the SETUP Port 0 menu. The description of these branches can be found in the section Configuration of the Serial Ports.

6.2.1 Navigation within the Telnet menu

An overview of the entire Com-Server configuration menu is shown on the previous page. On the monitor you will see always just one level of the selected menu. Simply entering the number of the desired menu and pressing the ENTER key takes you to the next level. Entering a q or pressing the ENTER key takes you back to the previous menu level.

Page 70

W&T Configuration access to the Com-Server

The last configured value of a menu item appears in parentheses. If you make changes, the new value will appear at this point the next time the menu is opened. It only becomes effective in the Com-Server itself however if you have saved it using SAVE Setup.

As long as you do not open this menu item, you can move around in the entire menu and change values without actually changing anything.

If you exit the configuration menu by closing the Telnet connection without first doing a SAVE Set- up, the original configuration will be retained.

Page 71

W&T Configuration access to the Com-Server

Subject to error and alteration

6.3 Configuration via Browser - Web Based Management

The Com-Server also allows configuration via HTTP protocol and a standard Internet browser. The menu structure of the WBM (Web Based Management) is compatible with the Telnet configuration.

For reasons of security and downward compatibility, WBM is factory disabled.

6.3.1 Activating WBM with the WuTility-Tool

The Web-Based-Management of the Com-Server can be activated at any time using WuTility as part of assigning the network parameters. Select the Com-Server in the device list and then click on the IP address button. In the first window of the dialog enter the desired values for IP address, subnet mask and gateway and then click on the Continue button. In the following window activate the WBM option and enter the desired TCP port number. As a rule HTTP standard port 80 should be used. If use of port 80 is not possible or desired, then the deviating port number must be explicitly specified in the address line of the browser when opening the Com-Server homepage:

http://[IP address or Hostname]:[Port number]

6.3.2 Activating WBM via the serial interface

When serially assigning the IP number, you can optionally specify the TCP port number under which the WBM should be accessible. To do this, first connect the serial port A on the Com-Server and the COM port on your computer using a null modem cable. Start a terminal program and set the transmission parameters to 9600 baud, 8 data bits, no parity

Page 72

W&T Configuration access to the Com-Server

and no handshake. During a reset of the Com-Server hold the x key down until after approx. 2 sec. the IPno.+<Enter>: prompt appears. Now directly following the IP address enter the extended address string +w[Portno.]. Portno. represents here the desired TCP port in decimal format. A value of 0 deactivates the WBM.

After finishing your entry by pressing the Return key, the values are stored in the non-volatile memory and you can immediately access the Com-Server and the set WBM port using your Internet browser.

Additional information about serial configuration

possibilities for the Com-Server and navigation within the WBM can be found in the sections Serial Assignment of the IP Address, Subnet Mask and Gateway, and Navigation within the WBM.

Example 1:

Here the IP address 172.17.231.99 is assigned to the ComServer and +w80 is used to activate the WBM on the HTTP standard port.

xxx -> Com-Server IP no.+<ENTER>: <- Com-Server

172.17.231.99+w80 -> Com-Server

172.17.231.99-1 <- Com-Server

Example 2:

In this example the Com-Server gets address 172.17.231.99, Subnet-Mask 255.255.0.0 and the Gateway 172.17.231.52. In addition, -0 is entered to turn off BOOTP/DHCP protocol and +w8585 to activate WBM on TCP port 8585.

xxx - > Com-Server IP no.+<ENTER>: <- Com-Server

172.17.231.99,255.255.0.0,172.17.231.52-0+w8080 -> Com-Server

172.17.231.99,255.255.0.0,172.17.231.52-0+w8080 <- Com-Server

Page 73

W&T Configuration access to the Com-Server

Subject to error and alteration

6.3.3 Activating WBM from the configuration menu

If you want to activate WBM on an already operational Com-Server, you can do this via Telnet configuration. Start a Telnet session on port 1111 of the Com-Server. In the menu branch

2. SETUP System r 1. Setup TCP/IP r 6. WBM Port

enter the decimal number of the desired TCP port under which you want to reach the WBM. Then press the Return key until you are back in the main menu and from there open the SAVE Setup item. After you have quit the Telnet session, you can now access the Com-Server using an Internet browser.

6.3.3 Starting and navigating the WBM

To access the Web pages after activating the WBM, start your Internet browser and enter the IP address of the Com-Server and the configured port number in the address line:

http://[IP address]:[Portnumber]

If the HTTP standard port 80 was configured for WBM, you do not need to explicitly indicate the port number in the address line.

You will now be given the start page of the Com-Server with the system password prompt. The factory default setting is for no system password, so that you can get to the configuration menu by simply actuating the login button.

Page 74

W&T Configuration access to the Com-Server

Navigation

Since the WBM of the Com-Server is session-oriented, you must use backlinks and corresponding control buttons to navigate to the individual Web pages. Using the Back function in the browser can lead to problems in accepting the set parameters.

You can make as many settings as desired during a configuration session. Pressing the Send button in the respective pages pastes them to a clipboard. Once all the settings have been made, always exit the configuration session using Link Logout and the Save button there. Only then are the settings you made copied into the non-volatile memory of the Com-Server and activated.

Page 75

W&T Configuration access to the Com-Server

Subject to error and alteration

The logout page then offers the following possibilities for ending the configuration session:

Clicking on the Save button causes the Com-Server to save all the changes you made in its non-volatile memory and quits the configuration session.

Clicking on the Abort button causes the Com-Server to reject all the settings you made and quits the configuration session.

Clicking on the Restore Defaults button resets the Com-Server to its original factory setting. All settings including the network parameters IP address, subnet mask and gateway address are lost.

Page 76

W&T Configuration access to the Com-Server

Clicking on the Firmware Update button activates the mode in which the Com-Server expects a firmware update via TFTP protocol (see section Firmware Update of the Com-Server). Update mode can be exited only by complete transmission of a valid firmware or by interrupting the supply voltage. When using the WuTility tool for the firmware update, this mode is automatically started. In this case a manual start is not necessary.

Pressing the Hardware Reset button restarts the Com-Server, comparable with interrupting the supply voltage. Data from any other opened connections to the Com-Server are lost in this event.

The functions located on the logout page of the Com-Ser

ver can also be found in the Telnet menu branch SETUP

System r Setup TCP/IP.

Page 77

W&T

Subject to error and alteration

7 The basis configuration of the Com-Server

Here follows the explanation of all the configuration possibilities related

to the Com-Server operating system and which are not directly related to

the serial ports. The arrangement and function of the individual

parameters within the menu structure are for the most part identical with

Telnet and the Internet browser.

. Menu: INFO System

. Menu: SETUP System

. Saving your settings

Page 78

W&T The base configuration of the Com-Server

7.1 Saving your settings

When configuring using either Telnet or Web Based Management, all the changes are first saved only temporarily in the Com-Server. To make sure the settings remain intact even after a reset or power failure, each configuration session must be ended with an explicit save procedure.

Telnet

From the main menu select SAVE Setup. Respond with y to the Save Changes ? prompt. If a correct entry was made, the text Saving… will appear on the monitor, and the Com-Server saves all the settings you made in its non-volatile memory. Once the data have been saved, they are activated each time the Com-Server is turned on or reset.

Entering anything other than y or simply pressing the ENTER key returns you to the main menu without saving the values.

Exceptions are the network parameters IP address,

subnet mask and gateway, since these are also relevant

for the running configuration session. To save and activate these you must enter q to quit the Telnet configuration after executing SAVE Setup. The Com-Server then autonomously performs a reset and only then begins to work with the new settings.

Browser - WBM

Exit the configuration session using the Link Logout and click on the Save button.

Page 79

W&T The base configuration of the Com-Server

Subject to error and alteration

7.2 Menu: INFO System

This menu allows you to call up device-specific parameters such as the version njmber and creation date of the firmware, MAC address of the unit, etc.

n Cable type

Shows the current Ethernet connection of the Com-Server (10BaseT or 100BaseT).

n MAC address

Shows the Ethernet address of the Com-Server. This number is factory set and registered. It cannot be changed.

n SOFTW Date/Rev.

Shows the creation date and version number of the operating software in flash.

n HARDW Rev.

Shows the version status of the Com-Server hardware.

n Run Time

Shows the time in hours and minutes since the last ComServer restart.

Page 80

W&T The base configuration of the Com-Server

7.3 Menu: SETUP System

This menu is for configuring all the parameters that pertain to the Com-Server operating system and are independent of the serial interface.

7.3.1 Menu: SETUP System r Setup TCP/IP

n IP-Address (Default = 0.0.0.0)

Enter here the IP address if you want to change it. Please note that this number is not freely selectable, but rather needs to be specified based on the network address of the TCP/IP network. The format corresponds to the normal syntax (e.g. 172.16.231.5).

n Subnet Mask (Default = 255.0.0.0)

The subnet mask only needs to be entered if the Com-Server will be making connections to another subnet. Enter the subnet mask of the subnet in which the Com-Server is located (e.g. 255.255.255.0). Please note: The IP address determines the network class. From this is derived a default subnet mask (e.g. 255.255.0.0 for a Class B network).

n Gateways (Default = 0.0.0.0)

In this menu branch the IP address of the standard gateway or router can be configured. If you have not configured fixed routes, the standard gateway is used for all network packets whose destination IP address is not in the local subnet.

n Route 1-4 (Destination, Netmask, Gateway)

In addition to the standard gateway, up to four fixed routes can be defined. Packets whose destination addresses are in the networks configured here (=destination) are always sent through the gateway assigned to this route. A fixed route is only accepted and stored by the Com-Server if the following check is true:

Destination AND Netmask == Destination

Page 81

W&T The base configuration of the Com-Server

Subject to error and alteration

Changes to the system parameters IP-Address,

Subnet Mask, Gateway and Route 1-4 cannot be

activated right after saving. The Com-Server will use these values only after closing the current Telnet connection using q.

n DNS Server (Default: 0.0.0.0)

The entry contains the IP address of the DNS server (Domain Name System). The latter is needed in all client modes of the Com-Server (TCP, UDP, Telnet, FTP client) if the destination system is to be stored in the configuration not as a numerical IP address, but rather in the form of a host name or URL. The name is resolved by the Com-Server is done via UDP using standard port 53 reserved for the DNS.

The Time-To-Live of the IP address resolved for a host name is determined by the Time-To-Live parameter contained in the response from the DNS server. After the name has been successfully resolved this time is displayed in the menu item SETUP Port 0 r Port State r Connection State.

n MTU – Maximum Transfer Unit (default: 560)

This value determines the maximum size of a TCP/IP packet. It refers to the number of bytes (excluding header) that can be sent in a packet. The smaller the MTU, the more network buffer overall is available in the Com-Server. The selectable range begins at 560 and ends at 1460 bytes. The values can be set in increments of 128 bytes (automatic correction).

n DHCP Client (Default: 1 = ON)

The DHCP protocol is activated with the factory settings (menu entry = 1). The Com-Server attempts to find a DHCP server and get an IP address from it. Entering 0 deactivates DHCP and the Com-Server works statically with the IP address assigned to it. More information on how DHCP works can be found in the section IP Assignment via DHCP Protocol.

Page 82

W&T The base configuration of the Com-Server

To prevent unintended address assignments or

changes, we recommend deactivating the DHCP, BOOTP and RARP protocols if they are not expressly used in the respective network environment.

n BOOTP Client (Default: 1 = ON)

The factory setting is for BOOTP protocol deactivated (menu entry = 0). Entering 1 activates the function and the ComServer attempts to obtain an IP address from a BOOTP server after each reset. More information on how BOOTP works can be found in the section IP Assignment via BOOTP Protocol.

To prevent unintended address assignments or

changes, we recommend deactivating the DHCP, BOOTP and RARP protocols if they are not expressly used in the respective network environment.

n WBM Port (Default: 0000)

The decimal value specifies the TCP port under which the Web Based Management (WBM) of the Com-Server is accessible from an Internet browser. The factory setting is 0000, which means WBM is deactivated. If for example you set a value of 80 (= standard HTTP port), you can open the Web configuration from an Internet browser without explicitly specifying the port number. It is sufficient to enter the IP address or the name of the Com-Server stored in the DNS. When using other port numbers, these must be given in the address line of the browser as well separated by a colon (e.g., http)://172.17.231.49:1234).

n Keep Alive Time (sec) (Default: 0 = OFF)

If the keep-alive check is activated by entering and saving a value in second ticks, all TCP connections are monitored for network-side data traffic. If there is no network traffic within the set time, the Com-Server generates a keep-alive packet. If the partner does not answer this packet, the connection is reset in the Com-Server. This deletes any data still contained in the serial in- and output buffers.

Page 83

W&T The base configuration of the Com-Server

Subject to error and alteration

Example: A TCP client has opened a connection to TCP server port 8000 of the Com-Server and the network connection is interrupted. After the set keep-alive time plus 2s for two repetitions has elapsed, the Com-Server closes the connection and is again ready for any other clients.

n Retransmission Timeouts (ms) (Default: 240)

This timeout determines what time must elapse before network packets are repeated if necessary. In most networks the default setting of 240ms can be used. Only when there are very long latency times between the ComServer and its respective communications partner would you need to increase this value.

7.3.2 Menu: SETUP System r Telnet Password

Here you may specify an 8-character hexadecimal password (valid charcters = 0...9 and a...f) for protecting the configuration menu from unauthorized access. The factoryset password is 00000000. With the password you have unrestricted access to the Com-Server‘s configuration menu.

You are prompted for a valid password as soon as the Telnet connection for the configuration port is opened. An incorrect entry denies access to the Com-Server‘s configuration port.

Resetting or changing any parameters including the

password is only possible if you know the old password. Make sure you write it down and keep it in a safe location.

Page 84

W&T The base configuration of the Com-Server

7.3.3 Menu: SETUP System r System Password

The system password, which consists of any 31 (max.) characters, protects against any subsequent configuration and control access to the Com-Server.

· 1111: Telnet configuration menu

· [WBM port]: Web Based management (if enabled)

· 8003: Read the configuration file

· 8004: Write the configuration file

· 8888: Reset Com-Server

· 9084, 9184, 9284, 9384: Reset port status A-D

· 9094, 9194, 9294, 9394: Control port A-D

· 161 (UDP, SNMP)

On Telnet port 1111 and on WBM port the system password is prompted as soon as the connection is opened. For all other associated TCP ports the password must be null-terminated (=[password] + 0x00) and sent to the Com-Server no later than 2s after the TCP connection has been established.

Queries from SNMP managers are only responded to by the Com-Server if the community corresponds to the system password.

For additional information on using system passwords in conjunction with the configuration and control ports, see the section „Expanded Services of the Com-Server“.

The system password is on a higher level than the

Telnet password. This means that after assigning a system password, a previously set Telnet password may become invalid, so that the system password must be used for all password prompts.

Page 85

W&T The base configuration of the Com-Server

Subject to error and alteration

7.3.4 Menu: SETUP System r System Name

The freely configurable system name consisting of max. 31 characters is used to identify the Com-Server. This name is displayed as an opening message in the client for all Telnet sessions.

The factory default setting for the system name is COMSERVER_ followed by the last three places of the Ethernet address. For example the factory set system name of a Com-Server with the Ethernet address 00:c0:3d:01:02:03 is COMSERVER_010203. When using DHCP protocol the system name is also used for identification by the DHCP server.

7.3.5 Menu: SETUP System r Flash Update

Before you activate the update mode, make sure that you have quit any active network connections. Then confirm with „y“. The update mode is indicated by lighting of the Status LED on the Com-Server.

Activate this mode when you want to perform an update of the Com-Server operating software over the network using the management tool WuTility or TFTP (see Firmware update of the Com-Server).

You may quit the update mode only by either

completely performing the update or by means of a

reset, i.e. turning off the power!

7.3.6 Menu: SETUP System r Factory Defaults

Enter a y to reset all the parameters. The configuration is then in its factory preset state. The Com-Server closes the Telnet

Page 86

W&T The base configuration of the Com-Server

connection. Then it performs a software reset in order to activate the new configuration.

Resetting the non-volatile memory causes loss of all the

settings which deviate from the default values, including the IP address.

7.3.7 Menu: SETUP System r Reset

Select this menu item to perform a software reset on the ComServer. First your Telnet connection is properly closed.

All data from any still open network connections are

lost

Page 87

W&T The base configuration of the Com-Server

Subject to error and alteration

7.4 Menu ... r TCP/IP Mode r System Options

In this menu branch you can set specific system parameters.

n Network Delay [10ms-Ticks]

Default: 0000

This value specifies the minimum delay time of the ComServer after serial data have arrived. After this time has expired, it packs the data into a network packet and sends them to the respective communications partner. The default setting 0 means the attempt is made to send the data as quickly as possible. The resulting high time transparency does however bring with it the drawback of a higher number of network packets.

If the serial transmission takes place in predictable block sizes, this value can be adjusted to optimize the network load. There is also the advantage that the serial blocks are transmitted within a network packets, so that they arrive at the receiver bundled.

Example:

You are using serial data blocks of 25 bytes each and transmission parameters of 9600 baud, 8 data bits, no parity and 1 stop bit. Each block thus has a length of approx. 26ms (1/9600 * 10 bits * 25 bytes). If the network delay is set here to a value of 3 (=30ms), each block is sent to the receiver with a network packet.

The situation described here applies only to a non-

overloaded and error-free network. If there are interruptions in the data flow on the network side, any serially accumulated data are also sent in larger network packets.

Page 88

W&T The base configuration of the Com-Server

n Telnet Echo

Default: active

When opening a Telnet session, negotiation between the stations takes place on the network side to determine who will generate the echo of the characters sent by the client. Either the client application generates a local echo, or the Telnet server generates a remote echo by immediately returning all received data. The Telnet echo option on the Com-Server is defined as follows:

Telnet Echo = active

The Com-Server negotiates a remote echo with the client application, and the local echo is turned off. In this case the device serially connected to the Com-Server must generate the echo.

Telnet Echo = disabled

The Com-Server tells the client application when opening the connection that it will not generate an echo, which results there in activation of the local echo. The local echo may have to be manually activated on the Telnet client.

n Flush Buffer

Default: active

If this switch is active, the serial buffer is cleared each time a new connection is opened; any residual data which cannot be transmitted (e.g. handshake stop of the serial terminal device) are thus lost. But if you connect a terminal device to the Com-Server which for example requires a longer handshake stop for program reasons, you can prevent clearing of the buffer by deactivating the switch. In this way multiple connections can be opened one after the other on the network side and the data are accumulated in the buffer until they are sent.

Page 89

W&T

Subject to error and alteration

8 Configuration of the serial port

. Configuring the serial transmission parameters

In addition to the usual settings for baud rate, data bits, parity and stop

bits, the various handshake procedures and available special functions of

the individual control signals are explained here.

Page 90

W&T Configuration of the serial port

8.1 The serial parameters (Menu: UART Setup)

Like any serial device, the Com-Server port must be set to match the communication parameters of its partner. All the RS232 parameters relevant for operation are configured in the Setup Port x r UART Setup menu. In addition to the usual settings for baud rate, data bits, parity and stop bits, here you can also specify the handshake procedure as well as the functions of the individual control signals and the UART-FIFOs.

The settings only become active after saving with

SAVE Setup or pressing the button Save on the Logout page. Please note that saving the parameters deletes all data currently located in the ComServer port buffers.

8.1.1 Baud rate, Data bits, stop bits, parity

The desired transmission parameters can be selected by entering the corresponding designation in the respective branch of the menu tree. Invoking Save Setup in the master menu saves the changes you made in the non-volatile memory of the ComServer and simultaneously activates them.

Freely selectable baud rate (Special Baud Divisor)

In the submenu Special Baud Divisor you can enter any desired divisor for generating the baud rate. This makes it possible to work even with non-standard baud rates. The baud rate and divisor are calculated using the following formulas:

Models 58631, 58431

Divisor=

11,0592*10

16*Baudrate

Baudrate=

11,0592*10

16*Divisor

Page 91

W&T Configuration of the serial port

Subject to error and alteration

Models 58031, 58034, 58633, 58231, 58331, 58334

Divisor=

7,3728*10

16*Baudrate

Baudrate=

7,3728*10

16*Divisor

The currently configured baud rate is displayed when selecting the submenu SETUP Port x (serial) r UART Setup.

By allowing any divisor, very high baud rates are possible. Please note in this connection that the upper limit for a bundled data stream is 230.4 kbps.

The indicated value refers to a handshake-controlled half-duplex transmission with no parity and a non-loaded

network.

8.1.2 The handshake modes

(SETUP Port x r UART Setup r Handshake)

This menu provides three standard modes for flow control of the serial port. As opposed to these predefined handshake profiles, you can use the Special submenu to specify the function of each control signal individually. This allows you for example to use hardware-controlled TCP connection control. Details on the control line functions are contained in the description of the submenu.

n Hardware Handshake

When using hardware handshake, the individual RS232 signals perform their factory-set functions as described in the section „RS232 Interface“. Please note that the meaning of the individual signals may be changed by the respective user software.

Function of the control signal: RTS: Flow Control

DTR: Show Connection CTS: Flow Control DSR: NO

Page 92

W&T Configuration of the serial port

n Software Handshake

The software handshake is implemented using the two ASCII characters (11H)=XON and (13H)=XOFF. In the standard setting Software Handshake these two codes are considered by the Com-Server as control characters and are filtered out from the actual data flow in both directions. This filtering can be turned off individually for each data direction in the Special submenu.

Function of the contorl signal:RTS: NO (Default HIGH)

DTR: NO (Default HIGH) CTS: NO DSR: NO

n NO Handshake

Turns off any hardware or software flow control for the serial interface. All the data are output to the connected terminal device regardless of the status of the inputs CTS and DSR. Any impending overflow of the serial input buffer is not signalled by the Com-Server. The setting NO Handshake makes sense for any data transmission that uses a serial protocol for data integrity or flow control.

Function of the contorl signal: RTS: NO (Default HIGH)

DTR: NO (Default HIGH) CTS: NO DSR: NO

n Special

Here it is possible to configure the function of the control lines differently from the three predefined protocols. In addition, the filter function of the „Xon“ and „Xoff“ characters used for the software handshake can be ifnluenced. Toggle between on and off by entering the menu number of the desired function. Settings made here are correspondingly overwritten by selecting one of the three predefined handshake modes.

Page 93

W&T Configuration of the serial port

Subject to error and alteration

n Pin: RTS & Pin: DTR

The following functions can be assigned to the outputs RTS and DTR:

1. Flow Control – If this function is turned on, the Com-Server handles the RS232 flow control through the corresponding output. The ready state for serial data is signaled by a HIGH signal (+3...12V). If the memory limit of the input buffer is reached, the line is set to LOW (-

3...-12V).

2. Show Connection – The output is switched to the serial port depending on an existing TCP connection. HIGH (+3...12V) indicates an existing connection.

3. NO (Default=HIGH) – The outputs are not used by the Com-Server and carry a constant HIGH level (+3...12V). A network application can use the control port of the Com-Server (see „Enhanced services of the Com-Server“) to temporarily influence the level.

4. NO (Default=LOW) – The outputs are not used by the Com-Server and carry a constant LOW level (-3...12V). A network application can use the control port of the Com-Server (see „Enhanced services of the Com-Server“) to temporarily influence the level.

n PIN: CTS und PIN: DSR

The inputs CTS and DSR can be assigned the following functions:

1. Flow Control – The serial flow control is performed using the corresponding pin. Serial data are output only if the input was set to HIGH (+3...12V) by the connected terminal device.

2. OPEN/CLOSE – Connection This option for TCP connection building and ending can be used to control connection building and ending in all Com-Server client operating modes. If the IP address and the TCP port are stored in the Com-Server, a HIGH level (+3...12V) on the corresponding input establishes a connection. The connection is closed with a LOW level (-3...-12V).

Page 94

W&T Configuration of the serial port

3. Accept only by HIGH – Connection establishment

of a TCP client is only accepted if a HIGH level (+3...12V) is present on the corresponding input. Likewise the connection is rejected when there is a LOW level.

4. NO (Manual IN) – The selected input is ignored by the Com-Server and plays no role either in data transmission or connection control.

n XON/XOFF

Here the handshake can be configured for XON/XOFF separately for each data direction. "XON/XOFF Receive" switches processing of this control character for serial receiving on: After receipt of an XOFF sent by the RS232 terminal device, the Com-Server stops serial data output until it receives an XON. If "XON/XOFF Send" is turned on, the Com-Server generates an XOFF when it is no longer able to receive serial data.

n XON/XOFF (Filter)

If XON/XOFF is turned off for flow control, this option can be used to separately determine for both data directions whether the Com-Server filters these control characters out of the actual data.

1. Send-Filter (Data direction r serial)

If this option is turned on and XON or XOFF characters occur in the actuqal data, the Com-Server filters them out and does not pass them along to the terminal device. Select this mode generally for bi-directional RS232 connections, since otherwise you will have problems with data traffic. If the Send-Filter option is turnd off, all the data including the XON and XOFF characters are sent unfiltered on the RS232 interface. This mode only makes sense if the connected terminal device is a graphics printer whose data stream can be expected to contain handshake characters.

Page 95

W&T Configuration of the serial port

Subject to error and alteration

2. Receive-Filter (Data direction r network)

If this option is turned on, the Com-Server interprets the XON and XOFF characters sent by the serial terminal device as control bytes and does not insert them into the network data stream. This ensures that the recipient in the network only gets actual user data. If Receive-Filter is turned off, the XON and XOFF characters sent by the serial terminal device are transmitted to the network together with the actual user data. This mode requires of the respective recipient in the network that it be able to separate actual data from control data.

The currently selected parameters are shown in the top line of the „UART Setp“ menu. As soon as a parameter is changed, until the parameters are saved this display does not show the configuration with which the Com-Server port is currently working!

Display format:

[Baud], [Parity], [Data bits], [Stop bits], [Handshake], [FIFO]

Possible values for the handshake variables are:

[N]

[H]

[S]

[Special]

Send-Filter

---

Receive-Filter

---

No handshake

Hardware handshake

Software handshake XON/XOFF

Special setting configuration menu "Handshake-Special"

Page 96

W&T Configuration of the serial port

8.1.3 FIFO Send/Rec

The submenu allows the FIFO memory of the serial receive module to turn on and off. Models 58031, 58034, 58231, 58331, 58334 and 58633 also make it possible to set various trigger thresholds.

Especially when transmitting large quantities of data at high baud rates (above 57.6 Kbaud), it is recommended that you turn on the FIFOs in order to reduce the system load. If for example when working with serial protocols you require as short a delay in data transmission as possible, the FIFOs should be turned off.

Page 97

W&T

Subject to error and alteration

9 The protocol stack of the Com-Server

. Services of the Com-Server

. Addressing in the TCP/IP network

. The serial ports as seen from by network

Page 98

W&T The protocol stack of the Com-Server

9.1 Services of the Com-Server

The actual data are exchanged between the application and the Com-Server port using TCP/IP or UDP/IP. Which protocol is selected and the type of connection (Client or Server) for data transmission depends on the application. The following table shows the various modes of the serial Com-Server port.

Menu: Setup Port x r TCP/IP Mode

"TCP-Server" Mode

"TELNET-Server" Mode

"FTP-Server" Mode

"TCP-Client" Mode

"UDP-Client" Mode

"TELNET-Client" Mode

"FTP-Client" Mode

"Box to Box" Mode

"IP Bus Mode

SLIP-Router

Serial Socket Interface

r TCP-Client

r UDP-Client

r Telnet-Client

r FTP-Client

r Box to Box

r IP Bus Mode

r SLIP Router

r Ser. Socket Interface

In addition to simple transmission of the data, a dedicated TCP port provides functions for monitoring and configuring the serial interface (see Enhanced services of the Com-Ser- ver).

The Com-Server supports the following protocols:

••

• ARP, RARP, ICMP (Ping), RIP, DHCP, BOOTP, DNS, SNMP

••

• IP, TCP (Client / Server), UDP (Client / Server)

••

• FTP (Client / Server), Telnet (Client / Server), HTTP (WBM)

••

• SLIP

Page 99

W&T The protocol stack of the Com-Server

Subject to error and alteration

9.2 Addressing in the TCP/IP Network

Addressing in the TCP/IP network is done in two steps. FIrst the network station itself is addressed with the IP address, then the services of this network station are addressed with TCP port numbers. Each IP address must be unique throughout the network, and each port number must be unique on the network station.

Addressing the serial ports is done analogously. The ComServer is assigned an IP address upon installation (see Assigning the IP address). This address is used to access the Com-Server. The individual services are factory addressed using the following port numbers.

RS232, RS422/485

User programs

TCP/IP-

Stack

Com-Server

TCP/IP-

Stack

IP addr.:

172.0.0.1

ETHERNET

FTP

- Server

- Client

Standard tools

Datagrams

- UDP server

- UDP client

SOCKET-API

IP addr.:

172.0.0.9

Streams

- TCP server

- TCP client

Special functions (server)

- Controlport

- Reset port

- Reset Com-Server

- EEPROM Download

- EEPROM Upload

Datagrams

- UDP server

- UDP client

- UDP Info packet

- UDP SNMP

FTP

- Server

- Client

Telnet

- Server

- Client

Streams

- TCP server

- TCP client

Telnet

- Server

- Client

- Configuration tool (server)

HTTP

- Configuration with Web Based Management

HTTP

- Client (Browser)

If in a particular case the factory assigned port number canot be used, you may modify it (see Configuration of the TCP/IP modes).

Page 100

100

W&T The protocol stack of the Com-Server

9.3 The protocol stack of the Com-Server

There are several possibilities for transporting serial interface data. The Com-Server port supports the standard protocols FTP and Telnet. It also allows you to transport the data on the socket interface level directly as TCP streams or UDP datagrams inother words, without any additional higher-order protocol. The illustration below shows the protocol layering in the ComServer:

FTP Client/Server

Telnet Client/Server

Client/Server Client/Server

Standard protocols:

Socket interface applications:

TCP-Streams UDP-

Datagrams

SOCKET-API

IP (Internet protocol) ICMP

Ethernet

Each mode is explained individually in the following sections. The server mode does not have to be configured separately; it is activated when a client of a TCP/IP station directs a connection request to the server in the Com-Server.

The client processes in the Com-Server need to be set up in the configuration menu of the Com-Server port.

9.3 1 Data transfer per TCP/IP and UDP/IP sockets

Using the socket API (under Windows WinSock, under UNIX Berkley Sockets, ...) it is possible to implement a variety of applications in the form of client or server processes on TCP/IP computers. The API offers all the functionality for transporting data over the network. You can customize your application program - that is, the further processing and evaluation of the data

- for your particular requirements.

The Com-Server provides both of the protocols possible on the socket level for data transfer: Client/server process with TCP