Black Box Switch SW590A R2 User Manual

JULY 1999

SW590A-R2

SW590AE-R2

SW591C

Code Operated Switch II

4-Port Expansion Board

TUS

LINK ST

COS-II

RESET

Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX

CUSTOMER

SUPPORT

INFORMATION

FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746

Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018

Web site: www.blackbox.com • E-mail: [email protected]

Contents

Chapter

Page

1 Specifications .............................................................................................................4

2 Introduction...............................................................................................................5

3 Installation..................................................................................................................6

3.1 Introduction..............................................................................................................6

3.2 Setting the DIP Switches ..........................................................................................6

3.3 Functions and Arrangements of the Switch Banks................................................7

3.4 Bank Assignments.....................................................................................................8

3.5 Configuring Ports with the Individual Port Switch Banks.....................................8

3.6 Setting Global Characteristics with the System Switch Banks...............................8

3.6.1 Functions fo Switch Bank SWF ......................................................................8

3.6.2 Setting the Arming Character with SWG....................................................10

3.7 Setting Global Characteristics with the Individual Banks ...................................16

3.8 Configuring Ports for DTE or DCE.......................................................................16

3.9 Connecting and Powering-Up the COS-II............................................................17

4 Operation

4.1 Introduction.......................................................................................................18

4.2 Creating a Link ..................................................................................................18

4.3 Signaling a Lock.................................................................................................18

4.4 Text Mode...........................................................................................................18

4.5 Graphics Mode...................................................................................................18

4.6 Indicators............................................................................................................19

4.7 Front-Panel Button ............................................................................................19

4.8 Self-Tests .............................................................................................................19

Quick Reference Guide ..............................................................................................21

If you’re already familiar with the Code Operated Switch II, and you just need to know how

to configure the DIP switches, you can turn to the Quick Reference Guide on page 21.

This product is CE certified. This certificate indicates that the product is suitable for

use in commercial and light industrial environments as defined in EN 50081-1:1992.

NOTE

Shielded interface cables must be used with this product. Call Technical Support

at 724-746-5500 for guidance in choosing cables.

CODE OPERATED SWITCH II

1. Specifications

Interface — RS-232 asynchronous (each port individually selectable for DTE or DCE)

Connectors — Switch: (5) DB25S female; Switch with Expansion Board: (9) DB25S female

Pins Supported — 1-8, 20, 22

Speed — 110 to 19,200 bps (selectable by port)

Memory — 8K buffer

Enclosure — Steel

Operating Temperature — 32°F to 113°F (0° to 45°C)

Humidity — 0 to 95% relative humidity

Mean Time Between Failures — Standard Switch: 20,000 hours; Switch with Expansion Board: 16,000 hours

Indicators —LEDs: 1 Power, 1 Lockout, 8 Port-Connected

Power — 115 VAC (230-VAC version available)

Size — 2.3"H x 12.2"W x 11"D (5.8 x 31 x 27.9 cm)

Weight — Switch: 7.5 lb. (3.4 kg); Expansion Board: 0.6 lb. (0.3 kg); Wallmount power supply: 2.1 lb. (1 kg)

CHAPTER 2: Introduction

2. Introduction

The Code Operated Switch II (COS II) makes

code-operated switching possible for diverse

combinations of serial devices. As it switches, the

COS II also reconciles differences in word size,

speed, flow control, and parity for up to four

devices. An Expansion Board, available separately,

doubles the maximum number of devices, to eight.

A special graphics timeout lets you send graphics

files through the Switch without the chance of

accidental switching. In graphics mode, the COS II

recognizes the appearance of the control code only

when the code characters are preceded by a pause

of a specified length. The COS II treats all other

occurrences of the control code as data—they are

passed along to the slave device with the rest of the

characters in the file.

Configuration is port-independent: You may set

different speeds, word sizes, parities, and flow-control

requirements for each port. The 8K buffer handles

speed conversions from 110 bps to 19,200 bps. DTE

and DCE are also independently determined for

every port.

Any office, lab, or shop with a variety of serial

devices will benefit from a COS II. Use it in a typical

multiprinter office, or to transfer files between

computers. You could also set up the COS II as the

link between a single PC and a mixture of high-

and low-speed remote data lines. The COS II will

pass your high-speed—9600-bps—data without

interference, while the internal buffer of the COS

will downshift PC data for the slower modems.

A control sequence manages the switching for the

COS II. The COS II will accept the sequence from

any port—the master port, which will ordinarily

have a PC or terminal connected to it, or any of

the four (or eight) slave ports.

CODE OPERATED SWITCH II

3.1. Introduction

3. Installation

switches for the internal options of the COS II.

Then, you’ll specify DTE or DCE for each port by

setting shunt jumpers. Finally, you’ll cable the

Switch to your devices and connect power to the

COS II.

In addition to this manual, your Switch package

should contain one standard switch unit and a

wallmounted power supply. After you’ve unpacked

the Switch, take a few minutes to look through this

manual. You will need a screwdriver large enough to

remove the case screws, and a small screwdriver or

other edged tool for setting DIP switches. Also, you

might want to refer to the manuals of the devices

you plan to connect to the COS-II.

3.2. Setting the DIP switches

In order to set the DIP switches, you’ll need to open

the case of the COS-II. There are several screws on

each side. Remove them, and lift the case lid from

the body of the COS-II. The board layout of your

unit should match the diagram shown below

(Fig.1).

Installing the COS-II is a simple, three-step task

that should take no more than an hour to

complete. First, you’ll configure all of the DIP

(BACK)

PORT 4

PORT 3

PORT 2

PORT 1

PORT 0

DTE

DCE

DTE

DCE

DTE

DCE

DTE

DCE

DTE

DCE

U20

U23

RESET BUTTON

VR1

INDIVIDUAL PORT SWITCHES

SYSTEM SWITCHES

(SWF & SWG)

PORT 4

PORT 3

PORT 2

PORT 1

PORT 0

STATUS INDICATORS

CH0CH1CH2CH3CH4CH5CH6CH7CH8

PWR

(FRONT)

Fig. 3-1. Board Layout for the COS-II.

CHAPTER 3: Installation

The board layout for the Four-Port Expansion

Board is shown on this page (Fig. 2). If you have

ordered one, check your Board to make sure it

matches.

A note on terminology: This manual will use the

following system to designate individual switches

within each switch bank. The bank label will be

given first, followed by a hyphen and then the

number of the DIP switch. “SWA-6” refers to the

sixth DIP switch of Switch Bank A. Also, the words

“ON” and “OFF” are used in the switch charts, but

your banks may have the words “CLOSED” and

“OPEN” printed instead. “CLOSED” is equivalent

to “ON,” and “OPEN” is equivalent to “OFF.”

NOTE: Every time you change the DIP switch

settings, you must press the reset button

located on the front panel of the switch, or

unplug the power supply. The COS-II will not

process any data during a reset.

You’ll set the following options with Switch Banks

SWA through SWE (the individual port banks):

• Data rates, from 110 to 19,200 bps

• Parity—even, odd, or no parity

A note on charts: you’ll find all the charts printed in

this chapter duplicated either in the Appendix or in

the Quick Reference Guide.

• Word sizes —7 or 8 bits

• Flow control by hardware (DTR/CTS) or

software (X-ON/X-OFF).

Section 3.4 covers these banks in more detail.

3.3 Functions and Arrangement of the Switch

Banks

On the standard board there are seven banks of DIP

switches, of which five control the characteristics of

the individual ports (SWA through SWE). The

remaining two banks (SWF, SWG) control options

that affect the entire system. The Four-Port

Expansion Board adds individual port banks SWH

through SWK.

The two banks SWF and SWG (system banks)

regulate:

• Responsibility for the Link Command (from

master or slave port)

• Automatic timeout period

• Length of pause in Graphics Mode

• Lead Pass-Through

• Arming character

(BACK)

PORT 8

PORT 7

PORT 6

PORT 5

DTE

DCE

DTE

DCE

DTE

DCE

DTE

DCE

INDIVIDUAL PORT SWITCHES

(PORTS 5 THRU 8)

PORT 8

PORT 7

PORT 6

PORT 5

OFF

SWK

SWJ

SWI

SWH

(FRONT)

Fig. 3-2. Layout of the 4-Port Expansion Board.

CODE OPERATED SWITCH II

In addition, there are some system characteristics

that are set with the eighth DIP switch of the

individual port switch banks. Sections 3.6 and 3.7

explain these functions in depth.

3.5.2 PARITY (SWITCHES 4 AND 5)

Parity

Set Switch

Even

Odd

OFF

None

3.4 Bank Assignments

3.5.3 WORD SIZE (SWITCH 6)

The individual port switch banks are assigned as

follows:

Size

Set Switch 6

OFF

7 bits per word

8 bits per word

Bank Label

SWA

Port

Master Device Port

SWB

SWC

SWD

SWE

3.5.4 FLOW CONTROL (SWITCH 7)

Flow Control

Set Switch 7

Hardware (DTR/CTS)

Software (X-ON/X-OFF)

OFF

The Four-Port Expansion Board provides these

additional banks:

3.6 Setting Global Characteristics with the

System Switch Banks

Bank Label

SWH

Port

Refer to the explanations and the charts below to

set the system switch banks SWF and SWG.

SWI

SWJ

SWK

3.6.1 FUNCTIONS OF SWITCH BANK SWF

Responsibility for the Link Command

When the COS II receives a control code sequence

from the proper device, it will establish a

3.5 Configuring Ports with the Individual Port

Switch Banks

communications link between the master port and

one of the slave ports. If it then receives the lockout

character—a character with a value of 38 in

hexadecimal—it will ignore the remaining unlinked

subordinate ports. For more information on links

and lockouts, see Sections 4.2 and 4.3.

To set the switch banks, use a small screwdriver or

other small object with a clean edge or point. The

individual port switch banks are identical in

function, and the set of charts provided on the

following pages applies to all of them.

You can set the Switch to accept the command to

link from only the master port, only a slave port, or

from either the master or a slave port. Switches

SWF 1 and SWF 2 designate the origin of the link.

3.5.1 PORT SPEED (SWITCHES 1, 2, AND 3)

Speed

Set Switches

Set SWF

110 bps

300 bps

600 bps

OFF

Origin of Command

master

slave

OFF

ON or OFF

OFF

1200 bps

2400 bps

4800 bps

9600 bps

19200 bps

either master or slave

NOTE: If the slave ports are set up for hardware

flow control, or if DTR/CTS pass-through is

enabled, you should set the Switch to

accept a link command from the master port

only.

CHAPTER 3: Installation

Automatic Timeout

Master Slave Leads Passed

DTE

DCE

DTE

DCE

DTE

DCE

Master CTS to slave DTR

The COS II times the intervals between the

reception of each character and the next. You may

instruct it to return to an unlinked state after

intervals of 2.5, 5, or 10 minutes, or you may disable

this automatic timeout feature. SWF 5 and SWF 6

control this feature.

Slave CTS to master DTR

Master CTS to slave CTS

Slave DTR to master DTR

Master DTR to slave DTR

Slave CTS to master CTS

Master DTR to slave CTS

Slave DTR to master CTS

Set SWF-

Timeout Setting

2.5 minutes

5 minutes

10 minutes

Disabled

OFF

control lead (DTR or CTS) will be dropped to

prevent data loss.

If you select Normal Operation, DTR (Pin 20) and

CTS (Pin 5) are used strictly for buffer control.

They are not passed straight through the Switch.

Graphics Pause

These switch settings are followed only when the

COS II has been set previously for Graphics Mode

(for an explanation, see Section 4.5). They

determine the amount of time that must pass

before the COS II recognizes a control code

sequence.

DCD-to-RTS Pass-Through Mode

To Set This Mode

Set SWC 8

CTS-to-DTR Pass-Through

Normal Operation

OFF

By providing for this pause, it is possible to send

graphics files through the unit with no risk that it

will switch accidentally when it encounters a control

code sequence, or its binary equivalent. SWF 7 and

SWF 8 determine the length of the pause.

If you select DCD-to-RTS Pass-Through, DCD

(Pin 8) and RTS (Pin 4) are passed straight through

the Switch. The next table shows how the DTE or

DCE setting of the port affects the pass-through

option:

CTS-to-DTR Pass-Through Mode

If you select Normal Operation, DCD and RTS are

Set SWF

To Set A Pause of

Master Slave Leads Passed

50 milliseconds

100 milliseconds

500 milliseconds

1.5 seconds

OFF

DTE

DCE

DTE

DCE

DTE

DCE

Master DCD to slave RTS

Slave DCD to master RTS

Master DCD to slave DCD

Slave RTS to master RTS

Master RTS to slave RTS

Slave DCD to master DCD

Master RTS to slave DCD

Slave RTS to master DCD

OFF

If you choose CTS-to-DTR Pass-Through, CTS

(Pin 5) and DTR (Pin 20) are passed straight

through the Switch. The next table shows how the

DTE or DCE setting of the port affects the pass-

through option:

always asserted. They are not passed through the

Switch.

NOTE: If the internal buffer fills, the appropriate

To Set This Mode

Set SWF 3

DCD-to-RTS Pass-Through

Normal Operation

OFF

CODE OPERATED SWITCH II

3.6.2 SETTING THE ARMING CHARACTER WITH SWG

Switch Bank SWG supplies a portion of the control-code sequence, the sequence that activates the Switch.

The arming character, the ASCII code that alerts the COS-II to an upcoming switch action, is set with SWG.

The settings are given in the chart below. For a more detailed explanation of control codes, see Section 4.2.

A note on abbreviations: LSB stands for least significant bit, MSB for most significant bit.

ARMING CHARACTER SWITCH POSITIONS

LSB

MSB

ASCII

NUL

SOH

STX

ETX

EOT

ENQ

ACK

BEL

CTRL

HEX DECIMAL

OFF

DLE

DC1

DC2

DC3

DC4

NAK

SYN

ETB

CAN

SUB

ESC

OFF

[

OFF

]

OFF

CHAPTER 3: Installation

ARMING CHARACTER SWITCH POSITIONS

LSB

MSB

ASCII

’

CTRL

HEX DECIMAL

OFF

(

OFF

)

OFF

;

OFF

CODE OPERATED SWITCH II

ARMING CHARACTER SWITCH POSITIONS

LSB

MSB

ASCII

[

CTRL

HEX DECIMAL

OFF

]

OFF

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

OFF

{

OFF

}

OFF

DEL

CHAPTER 3: Installation

ARMING CHARACTER SWITCH POSITIONS

ASCII CTRL HEX DECIMAL

LSB

MSB

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

OFF

CODE OPERATED SWITCH II

ARMING CHARACTER SWITCH POSITIONS

LSB

MSB

ASCII

CTRL

HEX DECIMAL

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

OFF

CHAPTER 3: Installation

ARMING CHARACTER SWITCH POSITIONS

ASCII CTRL HEX DECIMAL

LSB

MSB

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

OFF

3.7Setting Global Characteristics with the

Individual Banks

The COS II can perform a number of self-tests that

check the memory, the LEDS, the DIP switches, the

ports, and the interrupt circuitry of the Switch.

More information about the self-tests is given in

Section 4.8.

Several other system-wide options are specified not

by the system switch banks, but rather by the eighth

switch position of the individual port switch banks.

Explanations and tables are given below.

For

Set SWA 8

OFF

Normal operation

Self-test

Self-Test Function

NOTE

Sending or Suppressing Breaks

We recommend that you run software

flow control from your application

during self-test.

You can set the COS II either to pass break

characters along or to block them from reaching

your devices. SWB 8 controls this function.

CODE OPERATED SWITCH II

Set SWB 8

OFF

3.8. Configuring Ports for DTE or DCE

Pass breaks

Ignore breaks

A pair of DIP shunts lies behind each DB25

connector on both the main board and the

Expansion Unit. The pair eliminates the need for

crossover cable to connect devices to the Switch.

You can use standard straight-through cable may be

used instead, with the DIP shunts acting as

crossovers.

Lead Pass-Through

This function allows the COS II either to pass

hardware-handshake leads to connected devices, or

to block them. If they are blocked, the leads will still

be used to regulate the 8K internal buffer of the

Switch. The following table shows the behavior of

the COS II for different combinations of devices.

A shunt jumper lies in each shunt marked DCE.

To change the port configuration to DTE, just pry

the jumper gently from its current shunt, and insert

it in the DTE DIP shunt.

Master Slave

Leads passed

DTE

DCE

DTE

DCE

DTE

DCE

Master CTS to slave DTR

Slave CTS to master DTR

Master CTS to slave CTS

Slave DTR to master DTR

Master DTR to slave DTR

Slave CTS to master CTS

Master DTR to slave CTS

Slave DTR to master CTS

The chart below provides the signal direction for

the main RS-232 lines.

Configured as

DTE Port

TXD (2)

RXD (3)

RTS (4)

CTS (5)

N/A

DCD (8)

DTR (20)

RI (22)

Signal direction

Configured as

DCE Port

RXD(3)

TXD (2)

DCD (8)

DTR (20)

DSR (6)

RTS (4)

CTS (5)

N/A

Output from unit

Input to unit

Output from unit

Input to unit

Output from unit

Input to unit

Output from unit

Input to unit

To pass or block leads, use SWC 8.

Set SWC 8

Pass leads

To block leads

OFF

Text or Graphics Mode

SWD 8 and SWE 8 determine whether the COS II is

in Graphics Mode or Text Mode. These same

switches also govern the device that will signal the

pause when the Switch is in Graphics Mode. (For

more information on Text and Graphics Modes, see

Sections 4.4 and 4.5).

When set for graphics, the COS II can register (1)

only pauses in data coming from the master port,

(2) only pauses in data coming from a slave port,

(3) or pauses in data from all ports, either master or

slave. Use ththis chart to configure the switch

properly:

Set

For

SWD 8 SWE 8

Text Mode

OFF

Graphics Mode,

pause from master

Graphics Mode,

pause from slave

Graphics Mode,

pause from either

OFF

CHAPTER 3: Installation

3. Slide the cover back onto the base of the COS-II,

and secure it with the screws.

3.9. Connecting and Powering Up the COS-II

Once you have configured the internal switches and

jumpers, you can connect your devices and the

wallmounted power jack to the COS-II. Before you

begin, you might wish to check the settings of all

the DIP switches again, to make sure you have set

them correctly.

4. Connect the device cables to the ports.

5. Plug the wallmounted power supply into a

standard AC line.

Before you use the COS-II, you might wish to

familiarize yourself with the indicators, reset button,

and self-tests available. Chapter 4 explains these

features.

To prepare the COS-II:

1. Make sure that SWA 8 is set to OFF, that is, to

normal operation.

2. Insert the 4-pin power-supply plug in the power-

supply socket (at J1) on the COS-II circuit board.

CODE OPERATED SWITCH II

4.1. Introduction

4. Operation

4.3 Signaling a Lock

The primary action of the Switch consists of

detecting and responding to control-code

sequences. As it switches to a particular port, the

COS-II establishes a link between the master and

the slave device. After the COS-II has switched, it

can lock the link out, that is, it can ignore all

requests by other ports until the link is broken.

After a link has been established, all other ports can

be blocked from accessing the master port with a

lock command. Only the master port and the linked

subordinate port can put the COS-II in lockout, or

bring it out of lockout.

To put the COS-II in lockout, send the arming

character and the ASCII character with a value of 38

in hexadecimal—ASCII Numeral 8. To take the unit

out of lockout, send the arming character followed

by an ASCII character with a value of 39 in

hexadecimal—ASCII Numeral 9. When the COS-II

exits lockout, it will break the current link.

The linking and locking capabilities of the COS-II

have been covered briefly in Chapter 3. If you are

familiar with them, you can go on to Sections 4.4

through 4.8, which cover the modes, indicators, the

front-panel button, and the self-test feature. If,

however, you need information on linking and

locking, read Sections 4.2 and 4.3.

4.4. Text Mode

In this mode, the COS-II is activated as soon as it

receives a control-code sequence. If auto-timeout

has been selected, it will start its internal timer. The

text that follows will pass through until another

arming character appears within. Depending on the

character that appears next, the COS-II will either

place itself in lockout, or switch to another port.

4.2. Creating a Link

The COS-II creates a link between the master port

and a slave port when it receives a sequence of

characters called a control-code sequence. It may

receive these characters from the master port, a

slave port, or both types of ports.

The DIP switch setting for Text Mode is given in

The control-code sequence consists of two

characters: an arming character, and a port-select

character. The arming character warns the Switch

of an impending switch action, and the port-select

character specifies the port. ASCII values 0 through

3 (0 through 7 when the Expansion Board is

added) are used for the port-select character, while

any character within the extended ASCII character

set may be used for arming.

Section 3.7.

4.5. Graphics Mode

In this mode the COS-II will ignore appearances of

the control-code sequence unless they are preceded

by a pause of a certain length. Any arming character

that appears without the pause will be treated as

data.

After a link has been established, the COS-II

begins a timeout countdown. If the COS-II is idle

for 2.5, 5, or 10 minutes (you set the timing), it will

return to an unlinked state and disconnect from the

current port. The timeout can be disabled, and the

COS-II will then remain connected to the last

linked port indefinitely.

The pause may be measured from:

•the time the last character was sent from the

master port to the slave port;

•the time the last character was sent from the

slave port to the master port;

• or the time the last character was sent in

either direction.

The origin of the link command (from master or

slave ports), the arming character, and the length of

the timeout are all determined with DIP switches.

To set them, turn to Section 3.6.

Settings for graphics are given in Section 3.7.

CHAPTER 4: Operation

Explanations and screens for all of these tests are

4.6. Indicators

WHICH TESTS SHOULD BE RUN

(R)AM TEST

The front panel of the Switch contains 10 LEDs.

The Power LED, at the extreme right, will glow

steadily when power is on. The Lockout LED, a

green LED at the extreme left, will light when the

unit is in lockout.

(L)ED TEST

(D)IP SWITCH TEST

(S)ERIAL PORT TEST

(I)NTERRUPT TEST

(A)LL TESTS

Each of the eight port LEDs, numbered 0 through

7, will respond to the action of the COS II. When

the master port is switched to one of the slaves, the

corresponding LED will glow continuously.

given below.

RAM Test

RAM TEST 8K RAM IS GOOD

4.7. Front-Panel Button

The RAM test checks the internal memory of the

Switch by writing an internal test pattern, and then

reading it for accuracy.

The reset button is located on the front panel of the

COS-II. After you change one of the DIP switches,

you must reset the COS-II either by pressing the

button or by disconnecting power from the unit.

LED Test

4.8. Self-Tests

LED TEST IN PROGRESS, ALL LEDS SHOULD TURN ON AND

OFF. PRESS ANY KEY TO EXIT.

The COS-II can diagnose a variety of conditions

with an array of self-tests. To configure the switch

for a self-test, set the eighth switch of DIP Switch A

to ON.

The LED Test checks the LEDs by turning them all

off, then on one at a time, then all on, then off one

at a time. This test tells you if the LEDs are working

normally or whether any are shorted.

To run a test, follow these steps:

DIP Switch Test

1. Set SWA 8 (the eighth DIP switch of Bank A) to

ON.

2. Set

the master port to DCE with a shunt

jumper.

3. Set your terminal for 9600-bps operation, with

1 stop bit and no parity.

4. Power the unit.

DIP SWITCH TEST (MAIN BOARD) HIT ANY KEY TO GO TO

NEXT TEST

SWITCHES ARE DISPLAYED IN BINARY (0=OFF, 1=ON)

SWD

SWE

SWF

SWG

00010001

00100100

10001000

01010101

This message will appear on your screen:

The DIP Switch Test reads the switches and displays

their settings on the screen. This test tells you

whether the switches and associated circuitry are

operating normally and are set up to your

specifications. The settings will be displayed on

screen continuously until a key is pressed. When

you press any key, the box will check the settings

of the Expansion Board switches. If you haven’t

installed a Board, disregard the reading.

If you select R, the COS II will run any of the tests

CODE OPERATED SWITCH II SELF TEST

RUN TESTS (R)EPEATEDLY OR (O)NCE

you request again and again, until you press the

reset button.

If you select “O,” you get the message:

EXPANSION BOARD IS INSTALLED

DIP SWITCH TEST (EXPANSION BOARD) HIT ANY KEY TO GO

TO NEXT TEST

SWITCHES ARE DISPLAYED IN BINARY (0=OFF, 1=ON)

SWH

SWI

SWJ

SWK

00010001

00100100

10001000

01010101

CODE OPERATED SWITCH II

After you have hit a key, the screen will change to:

Interrupt Test

Serial Port Test

INTERRUPT TEST IN PROGRESS

SERIAL PORT TEST (EXPANSION BOARD IS NOT INSTALLED)

INTERRUPT TEST PASSED

PORT#

DATA

DTR/CTS/RI

FAILED

RTS/DCD

FAILED

The Interrupt Test checks the interrupt circuitry of

the unit. During this test, the letter “A” will appear

on screen. A message will indicate whether the test

was successful.

MASTER

PORT 0

PORT 1

PORT 2

PORT 3

FAILED

All Tests

SERIAL PORT TEST FAILED

If you request All Tests, the COS-II will run all the

listed tests in sequence.

The Serial Port Test is a loopback test that checks

whether data is being correctly transmitted and

received on any port. The test also checks, using

DTR/CTS/RI or RTS/DCD, whether the box can

loop back control leads correctly. To use this test,

you will need to jumper Pins 2 and 3. To test

DTR/CTS/RI and RTS/DCD, you’ll need to

jumper Pins 20, 5, and 22 together, and jumper Pins

4 and 8 together.

Quick Reference Guide

Individual Port Switch Bank Settings

Switch Position Setting

Option

Speed

110 bps

300 bps

600 bps

OFF

1200 bps

2400 bps

4800 bps

9600 bps

19200 bps

Parity

none

even

odd

OFF

Word Size

7 bits per word

8 bits per word

Flow Control

Hardware (DTR/CTS)

OFF

Software (X-ON/X-OFF)

OFF

Settings for Switch Option F

Switch Position Setting

Option

Link from master

“ ” from slave

“ ” from either

Time Out

OFF

ON or OFF OFF

2.5 minutes

5 minutes

10 minutes

OFF

Disabled

OFF

Graphics Pause

50 milliseconds

100 milliseconds

500 milliseconds

1.5 second

OFF

CODE OPERATED SWITCH II

System Switch Options Available through Position 8

Switch

Option

Self-test

SWA 8

SWB 8

SWC 8 SWD 8

SWE 8

Normal operation

Pass breaks

Ignore breaks

Lead pass-through

Normal operation

Graphics Mode

Pause In

OFF

Master Data

Slave Data

OFF

Master or slave data

Text Mode

OFF

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