Lantronix MSS1-T Bedienungsanleitung

MSS Reference Manual

For Lantronix MSS1-T, MSS1-T2, and MSS485

Micro Serial Servers

Contents

Introduction

1.1 RS-485 Networking Overview.......................................................................1-2

1.1.1 RS-485 Protocols..........................................................................1-2

1.1.2 Two-wire Mode...........................................................................1-2

1.1.3 Four-wire Mode .......................................................................... 1-2

1.2 Terms................................................................................................................. 1-3

1.3 Protocols............................................................................................................ 1-4

1.4 Software.............................................................................................................1-4

1.5 Configuration ................................................................................................... 1-5

Installation

2.1 MSS1 Components...........................................................................................2-1

2.2 MSS485 Components.......................................................................................2-2

2.3 Installation ........................................................................................................2-4

2.3.1 Power-up Diagnostics................................................................2-6

2.4 Is It Working?................................................................................................... 2-7

Getting Started

3.1 IP Address Configuration...............................................................................3-1

3.1.1 Using a BOOTP or RARP Reply...............................................3-1

3.1.2 Using an ARP Entry and the Ping Command........................3-2

3.1.3 Using the Serial Console............................................................3-3

3.2 Incoming Logins ..............................................................................................3-3

3.2.1 Controlling Incoming Logins....................................................3-3

3.2.2 EZWebCon Login and Configuration...................................... 3-3

3.2.3 Other Incoming TCP/IP Logins...............................................3-4

3.2.4 Incoming LAT Logins ................................................................3-4

3.3 Serial Port Logins.............................................................................................3-4

3.4 Remote Console Logins ..................................................................................3-5

3.5 Logout................................................................................................................3-5

Configuration

4.1 Command Set................................................................................................... 4-1

4.2 System Passwords ...........................................................................................4-1

4.2.1 Privileged Password................................................................... 4-1

4.2.2 Login Password...........................................................................4-2

4.3 Protocol Configuration ...................................................................................4-2

4.3.1 IP Configuration..........................................................................4-2

4.3.2 IPX Configuration.......................................................................4-4

4.3.3 LAT Configuration ..................................................................... 4-5

4.4 Serial Port Configuration................................................................................4-6

4.4.1 Access Mode................................................................................ 4-6

4.4.2 Baud Rate..................................................................................... 4-6

4.4.3 Parity, Character Size, and Stop Bits........................................4-6

4.4.4 Flow Control................................................................................4-7

4.4.5 Modems and Modem Signalling ..............................................4-7

4.4.6 Logouts.........................................................................................4-8

4.4.7 Preferred Port Service ................................................................4-9

4.4.8 Dedicated Port Service...............................................................4-9

4.4.9 Autostart ...................................................................................... 4-9

Using the MSS

5.1 Host-Initiated Connections ............................................................................5-1

5.1.1 Socket Connections.....................................................................5-1

5.1.2 LAT Connections ........................................................................ 5-2

5.1.3 Host Applications.......................................................................5-3

5.1.4 Code Examples............................................................................ 5-3

iii

5.2 Interactive Connections ..................................................................................5-3

5.2.1 Session Control............................................................................5-3

5.2.2 Outgoing Connections ...............................................................5-5

5.2.3 Status Displays............................................................................5-6

5.3 Emulating a Direct Serial Connection...........................................................5-8

5.4 Multihost Mode................................................................................................5-9

Commands

Technical Support

Troubleshooting

Pinouts

Specifications

Updating Software

Index

Introduction

1.1 RS-485 Networking Overview ......................................................................1-2

1.1.1 RS-485 Protocols.........................................................................1-2

1.1.2 Two-wire Mode..........................................................................1-2

1.1.3 Four-wire Mode .........................................................................1-2

1.2 Terms ................................................................................................................1-3

1.3 Protocols...........................................................................................................1-4

1.4 Software............................................................................................................1-4

1.5 Configuration ..................................................................................................1-5

Introduction

1 - 1

1 - Introduction

The MSS1-T and MSS1-T2 are multiprotocol serial servers that provide Ethernet connections for

personal computers, terminals, modems, and devices that would not otherwise be connected to a

network. The MSS485 is a multiprotocol serial server that provides Ethernet connections for

devices connected to an RS-485 network. All MSS products will collectively be referred to as MSS

in this manual.

The MSS can be used to start outbound Ethernet connections to hosts on TCP/IP, IPX/SPX, and

LAT networks. It can also provide interactive access to a device connected to its serial port.

However, unlike traditional print servers, the MSS does not provide printing protocols such as

LPR, RTEL, and PCONSOLE, or queueing support.

This manual explains how to install, conﬁgure, and use the MSS.

• The remainder of this chapter outlines MSS functionality. For MSS485

users, it explains RS-485 networking.

• Chapter 2,

Installation

, explains how to install the MSS hardware and

boot the server.

• Chapter 3,

Getting Started

, details different ways to log into the MSS

and prepare the server for conﬁguration.

• Chapter 4,

Conﬁguration

, covers basic TCP/IP, NetWare, and LAT pro-

tocol conﬁguration. It also explains serial port conﬁguration, including

modem conﬁguration.

• Chapter 5,

Using the MSS

, provides an overview of how to use the MSS

interactively and with host applications.

• Chapter 6,

Commands

, provides brief descriptions of each command in

the MSS command set, including syntax and restrictions.

• Appendices provided information on Technical Support, Troubleshoot-

ing, Pinouts, operating Speciﬁcations, and Updating Software.

Be sure to read the section of the conﬁguration chapter that applies to the protocol you are using

(TCP/IP, IPX/SPX, or LAT).

The PostScript and PDF versions of the MSS485 manuals are located in the

manuals

directory of

the CD. Use the Adobe Acrobat Reader (widely available on the Internet at no charge) to read and

print all or parts of the manual from the ﬁle

mssref.pdf

RS-485 Networking Overview Introduction

1 - 2

1.1 RS-485 Networking Overview

The RS-485 standard allows a transmission line to be shared like a “party line.” As many as 32

devices can share the multidrop network. Typically, one device is the master and the other devices

are slaves. There are a few important things to note about RS-485 networking with the MSS.

• The MSS can be used in either two-wire or four-wire mode. Refer to the fol-

lowing sections to determine which mode to use.

• The maximum RS-485 network cabling length (without repeaters) is 4,000

feet. Lantronix recommends the use of shielded twisted-pair cabling.

1.1.1 RS-485 Protocols

A large number and variety of protocols run over RS-485. However, the MSS does not convert or

interpret serial data. It only moves data between serial and Ethernet. Any RS-485 protocol will

have to be implemented by host software.

1.1.2 Two-wire Mode

In two-wire mode, the MSS operates in half duplex: one pair of wires shares transmit and receive

signals, and an optional third wire can be used for shield/ground. The main advantage of using

two-wire mode is reduced cabling costs.

Figure 1-1:

Example Two-wire Mode Network

On a two-wire RS-485 network, the MSS must turn its transmitter on when it is ready to send data

and then off a certain period of time after the data has been sent so that the line is available to

receive again. At most baud rate settings, the timing delay is typically one character length with a

maximum of 1.5 character lengths.

NOTE:

For 600 baud and 4800 baud operation, the timing delay is doubled.

1.1.3 Four-wire Mode

In four-wire mode, the MSS operates in full duplex: one pair of wires functions as the transmit

pair, another pair of wires functions as the receive pair, and there is a shield/ground wire for each

pair. In a four-wire RS-485 network, one device, such as the MSS, acts as master while the other

devices are slaves.

•

TXA

TXB

Shield

Shield •

•

RX Sh

Sh •

•••

•

RX Sh

Sh •

•••

•

RX Sh

Sh •

•••

•

Shield

Slave Slave Slave

Slave

MSS

(Master)

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