Moxa Technologies C114HI User Manual

C114HI

3 in 1 RS-232/422/485

Industrial Serial Board

Apr. 1998 (2nd Edition)

Copyright Notice

This documentation is copyrighted by Moxa Technologies Co., Ltd. All rights are reserved. Moxa Technologies reserves the right to make improvements to the products described in this manual at any time without notice.

Information provided in this manual is intended to be accurate and reliable. However, Moxa Technologies assumes no responsibility for its use, nor for any infringements of rights of the fourth parties which may result from its use.

MOXA is a registered trademark of Moxa Technologies Co. Ltd. The other trademarks in this manual belong to their manufacturers individually.

Moxa Headquarters

Tel : +886-2-8665-6373 Fax: +886-2-8665-6372

www.moxa.com support@moxa.com.tw

Moxa Tech USA (CA)

Tel : (408)734-2224 Fax: (408)734-4442

MoxaInternetService

s

Customer’s satisfaction is always our number one concern. To ensure customers get the full benefit of our services, Moxa Internet Services (MIS) have been built for technical support, product inquiry, new driver upgrade, etc.

The followings are the services we provide.

E-mail for technical support

address: support@moxa.com.tw

Ftp site for free driver upgrade

address: ftp.moxa.com or ftp.moxa.com.tw user ID: ftp password: your_email_address

World Wide Web (WWW) for product info.

address: www.moxa.com or www.moxa.com.tw

Table of Contents

Chapter 1 Introduction .........................................................................................1

1.1 Features................................................................................................2

1.2 Specifications.......................................................................................2

1.3 Check List............................................................................................3

1.4 Installation Guide.................................................................................3

Chapter 2 Hardware Installation and IO-IRQ.........................................................5

2.1 IO-IRQ Configuration Utility ..............................................................5

2.2 Jumper Settings for Interface...............................................................7

2.3 C114HI Board Installation...................................................................9

Chapter 3 Software Installation .........................................................................11

3.1 Windows NT/95, DOS/Windows 3.x ................................................11

3.2 SCO UNIX/XENIX...........................................................................11

3.3 OS/2...................................................................................................12

Chapter 4 For Windows NT Users........................................................................15

4.1 Software Installation..........................................................................15

4.2 Board and Port Configuration............................................................16

4.3 Board Initialization Status Checking .................................................17

4.4 Driver Upgrade/Removal...................................................................17

4.5 Baud Rate Settings.............................................................................18

4.6 MOXA Serial Comm Tool: PComm....................................................18

4.7 Troubleshooting.................................................................................18

Chapter 5 For Windows 95 Users........................................................................21

5.1 Driver Installation - Setup95.exe.......................................................21

5.2 Board and Port Configuration............................................................21

5.3 Board Initialization Status Checking .................................................23

5.4 Driver Upgrade/Removal...................................................................23

5.5 Baud Rate Settings.............................................................................23

5.6 MOXA Serial Comm Tool: PComm....................................................23

5.7 Troubleshooting.................................................................................23

Chapter 6 PComm.................................................................................................25

6.1 Installation .........................................................................................25

6.2 Programming Library.........................................................................25

6.3 Utilities...............................................................................................25

Chapter 7 For DOS Users .....................................................................................27

7.1 Driver Installation, Setup, Loading and Unloading........................... 27

7.2 MOXA Serial Port Naming Convention............................................29

7.3 Baud Rate Settings.............................................................................30

7.4 DOS API-232 Library and Programming..........................................30

7.5 Data Scope.........................................................................................31

Chapter 8 For Windows 3.x Users .......................................................................33

Chapter 9 RS-232/422/485 Programming..........................................................37

9.1 RS-232 Programming ........................................................................37

9.2 RS-422 Programming ........................................................................37

9.3 RS-485 Programming ........................................................................37

Appendix A Pinouts and Cable Wiring...................................................................41

A.1 RS-232...............................................................................................41

A.2 RS-422...............................................................................................44

A.3 RS-485...............................................................................................45

A.4 Impedance Matching and Termination Resistors............................... 46

A.5 Pinouts of DB-37 Connector..............................................................48

Appendix B High Speed Operations ......................................................................49

AppendixC Troubleshooting ................................................................................51

Appendix D I/O Port Address Map .........................................................................53

Chapter 1 Introduction

The Smart 3 in 1 Multiport Async Solutions

The C114HI is a RS-232/RS-422/RS-458 4-port serial communication interface board. Each port can be configured to RS-232, RS-422 or RS-458 individually. It is designed for the system manufacturers, integrators or VARs that want to provide all high performance, reliability and quality multiple port data communication system.

The C114HI provides a low cost, high performance solution for connecting up to 4 devices such as terminals, modems and printers to PC-based host computer. It belongs to the C104 family and features high speed and isolation protection.

The C114HI is so flexible in configuration that they are compatible with virtually all kinds of other manufacturer's 4 port non-intelligent boards using 16550 UART.

Operating System Support

The family is operational under most popular operating systems such as Windows NT, Windows 95, SCO UNIX/XENIX/OpenServer, DOS, Windows 3.x, OS/2, Linux, QNX, FreeBSD, MUMPS, PICK OS, IMS Multiuser DOS, etc. However, MOXA device drivers for Windows NT, Windows 95, DOS, Windows 3.x and Linux are provided for better installation, configuration and performance. In this manual, chapters for MOXA Windows NT, Windows 95, DOS and Windows 3.x device drivers are included. For other compatible systems not mentioned, please refer to the respective operating system’s manual for how to install and configure the standard driver.

MOXA Serial Comm Tool

For easy application development, MOXA provides an easy-use serial communication library under Windows NT/95 (PComm) and Windows 3.x/DOS (API-232). Users can use this library to develop your own applications using Microsoft C, Turbo C, Assembly, QuickBASIC, Turbo Pascal, Clipper, Visual Basic, Visual C++, Borland Delphi, etc. Utilities, such as diagnostic and monitor, are included for diagnosing the board/port or monitoring the communication status.

1

Introduction l l Chapter 1

1.1 Features

The C114HI 4 port RS-232/422/485 board provides the following advanced features:

u 16 bit AT bus architecture, more IRQs supported u ASIC-designed, easily configured by software ( IO-IRQ/DOS ) u Independent I/O address and IRQ settings for each of 4 serial ports u 4 high speed, up to 921.6K bps, TI550C UARTs with on-chip hardware flow

control, no data loss ( 16550 compatible )

u Compatible with PC standard ports: COM1 ~ COM4 u Supports isolation protection for RS-422/RS-485 u Supports 2-wire or 4-wire RS-485 operation modes u Supports RS-485 auto data direction switching feature u Supports Windows NT/95, DOS and Windows 3.x device drivers u Compatible with most popular Operating Systems

1.2 Specifications

u Bus interface : ISA(EISA compatible) u Number of ports : 4 u I/O address : 0x0000 ~ 0xFFFF u IRQ : 2, 3, 4, 5, 7, 10, 11, 12, 15 u Data bits : 5, 6, 7, 8 u Stop bits : 1, 1.5, 2 u Parity : none, even, odd, space, mark u UART : 4¡ÑTI550C

u Speed : 50 ~ 921.6K bps u Connectors : 4¡ÑDB-9 male (DTE)

u Data signals : RS-232: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND

RS-422: TxD+/-, RxD+/-, RTS+/-, CTS+/-, DCD, GND RS-485: TxD+/-, RxD+/-, GND

u Isolation protection : max. 2000V for RS-422 or RS-485 u Operating temp. : 0 ~ 55° C u Dimensions : 22 cm¡Ñ11.5 cm u C114HI is compatible with various operating systems. However, Moxa supports

proprietary drivers for better performance. See the driver list below.

2

Chapter 1 l l Introduction

C114HI

Windows NT 3/C Windows 95 3/C Windows 3.x 3/C DOS 3/C Linux R/C OS/2 C SCO UNIX/OpenServer C SCO XENIX C QNX C FreeBSD C PICK OS C MUMPS C Multiuser DOS C

3: Driver supported by Moxa and shipped with product R : Driver supported by Moxa but shipped by request C : Driver supported by OS Note: MOXA FTP site is available for driver download

1.3 Check List

Upon unpacking the C114HI package, you should find the following items included:

1. C114HI 4 port RS-232/RS-422/RS-485 board

2. This User's Manual

3. Windows NT/95 driver diskette¡Ñ1, DOS/Windows 3.x (API-232) driver diskette¡Ñ1, PComm diskette¡Ñ1

4. 30 cm cable ( DB-37 to 4¡ÑDB-9 male connectors )

1.4 Installation Guide

To install C114HI in a system, follow the instructions of Chapter "Hardware Installation and IO-IRQ" and then O.S. specific instruction of Chapter "Software Installation".

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Introduction l l Chapter 1

4

Chapter 2 Hardware Installation and IO-IRQ

2.1 IO-IRQ Configuration Utility

Before installing any driver for C114HI in the system, it is necessary to run DOS configuration utility, IO-IRQ.EXE, to configure the ports, such as I/O address, IRQ, Interrupt vector, etc. The utility is in the API-232 (DOS/Windows 3.x) driver diskette. And select "C104 family" for C114HI to configure.

The C114HI uses on-board EEPROM to save the board's configuration which can be accessed (read or written) via the Configuration Access Port (CAP). While the JP1 jumper cap of C114HI is removed, the CAP address is always equal to the same address of the first port. When the JP1 jumper cap is installed, the CAP address will be forced to 0xA700.

To save time, please determine in which operating system, e.g. Windows or OS/2 or SCO UNIX, the C114HI board will be used. In order to ease the configuration, the commonly used I/O address and IRQ combinations supported by most popular OSs have been collected in the IO-IRQ utility. Press "F3 - Select OS Compatibility" on 3rd level menu to bring the suggested list and choose a proper one. You can, however, enter the I/O and IRQ manually if none of the items is suitable.

For example, if the C114HI board is to be installed under SCO UNIX system as the primary (first) four port board, using SCO UNIX system serial driver, here is one of the possible settings,

a. Press "F3 - Select OS Compatibility" on 3rd level menu.

b. Then choose the entry of "SCO UNIX 1 (Arnet Compatible...)" which will

designate the C114HI's I/O base address to 0x280, IRQ to 4 and interrupt vector to 0x2C2.

Be careful not to conflict the I/O address and IRQ of the C114HI board with the existing board's.

5

Hardware Installation and IO-IRQ l l Chapter 2

PORT 4

RT8RT1 RT5RT3

RT7RT2 RT6RT4

485

422

232

JP13

ON

AUTO

JP5

PORT 4

485

422

232

JP4

PORT 3

REG

RTS OFF

ON

AUTO

REG

RTS ON

JP11

ON

AUTO

REG

RTS OFF

ON

AUTO

REG

RTS ON

PORT 3

PORT 2

PORT 1

232

422

485

JP9

ON

AUTO

REG

RTS OFF

ON

AUTO

REG

RTS ON

PORT 2

JP3

JP8 JP12

232

422

485

JP7

ON

AUTO

REG

RTS OFF

ON

AUTO

REG

RTS ON

PORT 1

JP2

JP6 JP10

JP1

C114HI’s Layout

6

Chapter 2 l l Hardware Installation and IO-IRQ

AAAA

2.2 Jumper Settings for Interface

Jumpers for the first and second ports are symmetric with those for the third and forth ports as shown in the above picture.

Port 1 Port 2 Port 3 Port 4 Selection Function JP 2 JP 3 JP 4 JP 5 Interface & RS-485 Operation Mode JP 6 JP 8 JP 10 JP 12 RS-422/RS-485 Transmitter Mode JP 7 JP 9 JP 11 JP 13 RS-422/RS-485 Receiver Mode

For illustration, jumper settings of the first port is shown below.

JP6 (Tx)

JP2

JP7 (Rx)

232

422

485

Jumper Settings for RS-232 Port

Put the jumpers in the positions as depicted. Do not care Tx (JP6) and Rx (JP7).

RTS ON REG AUTO ON RTS OFF REG AUTO ON

Jumper Settings for RS-422 Port

Put the jumpers in the positions exactly as depicted.

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Hardware Installation and IO-IRQ l l Chapter 2

AAAA

RTS ON REG AUTO ON RTS OFF REG AUTO ON

Tx: ON Rx: ON

Jumper Settings for RS-485 Port

There are many combinations of configuration for RS-485. To control the enable/disable mode of the transmitter and receiver, there are 3 options: "RTS ON", "REG" and "AUTO" for the transmitter (jumpers for Tx) and 3 options: "RTS OFF", "REG" and "AUTO" for the receiver (jumpers for Rx) Please decide which you need and put the jumpers in positions as depicted.

Full Duplex Operation Mode

RTS ON REG AUTO ON RTS OFF REG AUTO ON

Tx: RTS ON Tx: REG Rx: RTS OFF Rx: REG

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Chapter 2 l l Hardware Installation and IO-IRQ

AAAA

Half Duplex Operation Mode

RTS ON REG AUTO ON RTS OFF REG AUTO ON

Tx: RTS ON Tx: REG Tx: AUTO Rx: RTS OFF Rx: REG Rx: AUTO

Please also refer to Chapter 9 for RS-485 programming and Appendix A.3 for RS485 cable wiring.

2.3 C114HI Board Installation

To install C114HI, please follow the steps below.

Step 1. Choose a PC installed with DOS system or prepare a MS-DOS boot disk

for your PC.

Step 2. Power off PC.

Step 3. Set the interface type to RS-232, RS-422 or RS-485 for each port with the

jumpers on board.

Step 4. Install the C114HI board into a 16-bit slot.

The C114HI has the following default (factory) settings,

I/O address : 0x180 (1st port), 0x188 (2nd port)

0x190 (3rd port), 0x198 (4th port) IRQ : 10 (shared by four ports) Interrupt vector : 0x1C0 Configuration Access Port (CAP) : 0x180

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Hardware Installation and IO-IRQ l l Chapter 2

If you are going to install multiple C114HI boards, configure one board at a time to prevent hardware conflict. Make sure no existing devices have the same I/O address as the CAP address, e.g. 0x180. If so, try to avoid the conflict by doing either one of the following (a or b).

a. Short the jumper at position JP1 on the upper-left corner of C114HI.

This will force the CAP address to 0xA700.

b. Change or disable the existing board's I/O address.

ATTENTION ! For safety and to prevent C114HI from damage, please don’t attempt to install or remove the jumper cap of JP1 until the power of PC is off.

Step 5. Power on the PC and enter DOS system.

Step 6. Execute IO-IRQ.EXE included in the API-232 software driver diskette

and follow the on-line help to configure the C114HI which belongs to the C104 family.

Step 7. Do software installation described in Chapter 3. After completing both

the hardware and software configurations, the board is ready for use. Remember to connect the DB-37 to 4¡ÑDB-9 cable.

10

Chapter 3 Software Installation

The C114HI boards are compatible with various operating systems such as SCO UNIX/XENIX, OS/2, QNX, PICK OS, MUMPS, Linux, and IMS Multiuser DOS. Please refer to the relative operating system's manual for how to configure the board.

The C114HI boards support Windows NT, Windows 95, DOS and Windows 3.x device drivers. The compatible SCO UNIX/XENIX and OS/2 drivers are also described in this Chapter.

3.1 Windows NT/95, DOS/Windows 3.x

Please refer to Chapter "For Windows NT Users" or "For Windows 95 Users", "For DOS Users" or "For Windows 3.x Users" for more details.

3.2 SCO UNIX/XENIX

Because the SCO UNIX/XENIX has bundled a 4 port board driver, additional driver is not necessary. The following description is based on the SCOUNIX/XENIX driver. Under SCO UNIX/XENIX, if the C114HI is used as the first 4 port board, one possible configuration would be:

IRQ = 4 (i.e. COM1)

I/O base address = 0x280 (Arnet compatible) Vector = 0x2C2 (0x280 + offset 0x42)

For second 4 port board, the C114HI can be configured as:

IRQ = 3 (i.e. COM2) I/O base address = 0x300 (Arnet compatible) Vector = 0x342

Use the following SCO UNIX/XENIX command to start the software installation of a new serial board:

# mkdev serial

11

Software Installation l l Chapter 3

The screen will show:

You would like to install a:

1. 1 port card

2. 2 port card

3. 4 port card

4. ......

Enter number 3 to choose "4 port card". The screen then shows:

The card is configured as:

1. COM1

2. COM2

3. COM3

4. COM4

For first C114HI 4 port board, choose number 1 (COM1); for second, number 2 (COM2). Then the screen shows like:

Which card do you have?

1. Arnet base address 0xaaa

2. Arnet base address 0xbbb

3. Hostess base address 0xccc

4. ......

For first C114HI 4 port board, select "Arnet base address 0x280"; for second, "Arnet base address 0x300". Follow the on-line instruction to complete the rest of the installation procedure.

Once the installation is successfully completed, the following serial devices along with their modem devices (upper-case) will be added to the system.

tty1a tty1b tty1c tty1d (first C114HI) tty2a tty2b tty2c tty2d (second C114HI)

Be sure to activate the device by using SCO command:

# enable ttyxx

3.3 OS/2

The C114HI can be driven either by the default device driver accompanying with

12

Moxa Technologies C114HI User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual