Rockwell Automation 2755-DM9, 2755-DM9E User Manual

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Bulletin 2755 High Speed Decoder

(Catalog Numbers 2755-DM9 & -DM9E)

User Manual

ALLEN-BRADLEY

Important User Information

Solid state equipment has operational characteristics differing from those of electromechanical equipment. “Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls” (Publication SGI-1.1) describes some important differences between solid state equipment and hard–wired electromechanical devices. Because of this difference, and also because of the wide variety of uses for solid state equipment, all persons responsible for applying this equipment must satisfy themselves that each intended application of this equipment is acceptable.

In no event will the Allen-Bradley Company be responsible or liable for indirect or consequential damages resulting from the use or application of this equipment.

The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and requirements associated with any particular installation, the Allen-Bradley Company cannot assume responsibility or liability for actual use based on the examples and diagrams.

No patent liability is assumed by Allen-Bradley Company with respect to use of information, circuits, equipment, or software described in this manual.

Reproduction of the contents of this manual, in whole or in part, without written permission of the Allen-Bradley Company is prohibited.

Throughout this manual we use notes to make you aware of safety considerations.

ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, property

damage, or economic loss.

Attentions help you:

• identify a hazard

• avoid the hazard

• recognize the consequences

Important: Identifies information that is especially important for successful application and understanding of the product.

PLC is a registered trademark of Allen-Bradley Company, Inc. Pyramid Integrator, DTL and CVIM are trademarks of Allen-Bradley Company, Inc. VAX is registered trademark of Digital Equipment Corporation.

A–B

Using This Chapter

Description of Hardware

Chapter 1

Chapter Objectives 1–1 Overview of This Manual 1–1 Intended Audience 1–2 Conventions Used 1–2 Warnings and Cautions 1–3

Nomenclature 1–3

Related Publications 1–3

Chapter 2

Chapter Objectives 2–1 Differences Between DM9 and DM9E 2–1 Features of the Decoder 2–1 Laser Scan Heads 2–2 Physical Description 2–2 Indicators 2–3 Communications Ports 2–5 Output Modules 2–6 Power and Scan Head Connectors 2–8 Accessories 2–9

How the Decoder Operates

Configuring Your Decoder

Chapter 3

Chapter Objectives 3–1 How the Decoder Operates 3–1 Communications 3–4 RAM and EEPROM Memory 3–7 Operating Modes 3–9 Trigger Ending Conditions 3–10 Response Modes 3–10

Chapter 4

Chapter Objectives 4–1 Initial Programming of the Decoder 4–1 Programming Terminal Cable 4–2 Menu and Setup Screens 4–2 Start–up Procedure 4–4 Select Operation Menu 4–5 Using and Editing the Configuration (Setup) Screens 4–11 Command Bar 4–15

Table of Contents

Configuring Your Decoder

Installing the Decoder

Chapter 4

Setup Screen #1 4–17 Setup Screen #1 Fields 4–20

Message Format 4–20 Data Check Characters 4–23 Host Communications 4–24

Package Detect Input 4–27 Setup Screen #2 4–28 Setup Screen #2 Fields 4–31

Bar Code Types 4–31

Code Lengths 4–31

Scanner Control 4–33

Match Code Table 4–40

Outputs 4–41

Input 4–43 Programming Example 4–45

Chapter 5

Chapter Objectives 5–1 Equipment You Will Need 5–1 Electrical Precautions 5–2 How to Handle Excessive Noise 5–2 Grounding Recommendations 5–3 Determining Space Requirements 5–3 Installing the Decoder 5–4 How to Connect Your Equipment 5–5 Installing and Wiring Modules 5–7

Communicating With a Host

Chapter 6

Chapter Objectives 6–1 Host Port 6–1 RS–232 Interface 6–2 RS–422 Interface 6–4 RS–485 Interface 6–5 Message Format 6–7 Example Data Messages 6–9 Host Commands 6–10

Table of Contents

Host Commands Using a RS-232 or RS-422 Interface

Chapter 7

Chapter Objectives 7–1 RS–232/RS–422 ASCII Command Protocol 7–1

Single Character Commands 7–1 Two Character Commands 7–2 Responses to Commands 7–3 Host Commands 7–4

1. Set Code 39, I 2–of–5, and Codabar Check Characters 7–5

2. Clear Output Counter 7–6

3. Enable/Disable Bar Code Type 7–6

4. Set Configuration to Default Values 7–7

5. Set Host Communications 7–7

6. Write Header Message 7–8

7. Set Package Detect Input Filter and Sense 7–9

8. Write Source Identification Message 7–10

9. Read Output Counter 7–10

10. Set Message Format 7–11

11. Read Match Code Table 7–12

12. Write Match Code Table 7–13

13. Clear No–Read Count 7–14

14. Write No–Read Message 7–15

15. Read No–Read Count 7–16

16. Set Output Condition and Duration 7–16

17. Clear Package Count 7–17

18. Read Package Count 7–17

19. Reset Decoder 7–18

20. Set Configuration to Default Values, Save to EEPROM & Restart 7–18

21. Save New Configuration to EEPROM and Restart 7–19

22. Save New Configuration to EEPROM (No Restart) 7–19

23. Set Scanner Control 7–20

24. Set Bar Code Specific Length 7–21

Host Commands Using the RS-485 Interface

Chapter 8

Chapter Objectives 8–1 RS–485 Command Protocols 8–1 RS–485 ASCII Command Protocol 8–1 RS–485 PCCC Command Protocol 8–2

PCCC Command Format 8–2 PCCC Commands 8–5

Unprotected Read Command 8–5

Unprotected Read Command Structure 8–6 Unprotected Read Reply Format 8–7 Unprotected Read Example 8–9

iii

Table of Contents

Unprotected Write Command 8–10

Unprotected Write Command Structure 8–10

Unprotected Write Command Cont.

Unprotected Write Reply Format 8–12

Writing to the Command Area of Memory 8–13 Communication Link Diagnostic Commands 8–16

Link Diagnostic Command Structure 8–16

Diagnostic Link Reply Format 8–17

Read Diagnostic Counters Reply 8–18

Read Diagnostic Status Reply 8–19

Diagnostic Loop Reply 8–21

Reset Counters Reply 8–21

Maintenance and Troubleshooting

Specificatuions

Setting Up the Programming Terminal

Default Parameters Of the Decoder

ASCII Conversion Table

Configuration Area of Memory

Chapter 9

Chapter Objectives 9–1 Maintaining the Decoder 9–1 Power Input Fuse Replacement 9–1 Module Fuse Replacement 9–2 Troubleshooting 9–3

Chapter 10

Decoder 10–1

Appendix A A–1

Appendix B B–1

Appendix C C–1

Appendix D D–1

Protocol Selection Chart

Transmission Check Codes

Appendix E E–1

Appendix F F–1

Glossary G–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Index I–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents

Figures

2.1 Catalog No. 2755–DM9, –DM9E Decoder 2–3. . . . . . . . . . . . . . . . . . . .

2.2 LED Indicators 2–4. . .

2.3 Communications Ports 2–5. . .

2.4 Output Modules 2–6. . .

2.5 Input power and Scan Head Connectors 2–8. . .

3.1 Catalog No. 2755–DM9, –DM9E Decoder 3–1. . .

3.2 DC Output Module Application 3–3. . .

3.3 AC Output Module Application 3–3. . .

3.4 Input Module Auto Load Application 3–4. . .

3.5 Communications Interface Examples 3–5. . .

3.6 Decoder Memory 3–8. . .

4.1 Setup Screen #1 4–17. .

4.2 Setup Screen #2 4–28. .

4.3 Package Detect Signal 4–34. .

4.4 Internal Timer Trigger 4–35. .

4.5 Setting Inter–Scan Timer 4–39. .

4.6 Auto Load Feature 4–44. .

5.1 Mounting Dimensions of the Decoder 5–3. . .

5.2 Fasteners Used to Mount the Decoder 5–4. . .

5.3 Connecting Equipment to the Decoder’s Ports 5–5. . .

5.4 Modules and Connectors 5–7. . .

5.5 Module Connections 5–8. . .

6.1 Host Port Pin Numbers 6–2. . .

6.2 Communications With RS–232 Host Device 6–4. . .

6.3 Communications With RS–422 Host Device 6–5. . .

6.4 Communications In an RS–485 Network 6–6. . .

6.5 Message Format 6–7. . .

9.1 Power Input Fuse 9–1. . .

9.2 Output Module Fuse 9–2. . .

A.1 Connections for Cable Used With an ADM 3E Terminal A–1. . . A.2 Connections for Cable Used With DEC–VT100 Terminal A–2. . . A.3 One Possible Setup for DEC–VT100 Terminal A–2. . . A.4 Connections for Cable Used With 1784–T45 Terminal A–3. . . A.5 Connections for Cable Used With a Televideo 955 Terminal A–4. . A.6 Connections for Cable Used With 1770–T1, –T2, or –T3 Terminals A–5

Chapter

Chapter Objectives

Overview of this Manual

A–B

Using This Manual

Read this chapter to familiarize yourself with the rest of the manual. You will learn about:

• Contents of the manual.

• Intended audience.

• Conventions useed.

• Warnings and cautions.

This manual describes how to use the Catalog No. 2755–DM9 and DM9E High Speed Decoders. This manual contains the following chapters:

Chapter Title Purpose

1 Using This Manual

2 Description of the Hardware

3 How the Decoder Operates

4 Configuring Your Decoder

5 Installing the Decoder

6 Communicating With a Host

10 Specifications

- Appendices Includes glossary of terms.

- Index Alphabetical index.

Host Commands Using the RS-232 or RS-422 Interface

Host Commands Using the RS–485 Interface

Maintenance and Troubleshooting

Provides an overview of the manual.

Describes features and design of the decoder.

Describes how the decoder operates.

Provides step-by-step instructions on how to configure the decoder.

Provides general rules and recommendations for installing the decoder.

Describes how a host device can communicate with a decoder.

Describes how to send host commands and receive data using the RS-232 and RS-422 interfaces.

Describes how to send commands and receive data on an RS-485 Local Area Network.

Describes basic troubleshooting and fuse replacement procedures.

Provides basic decoder specifications.

1–1

Chapter 1

Using this Manual

Intended Audience

Conventions Used

You do not require any special knowledge to read this manual and follow its instructions. If the decoder will be used to communicate with a computer or

PLC communication devices, communications standards (RS–232, RS–422, RS–485), and communications terminology. In this manual, we describe the commands that a host device can transmit to the decoder and the command responses sent by the decoder. We do not describe how to create PLC or computer programs for generating the commands.

Some chapters in this manual contain examples of how to enter data or commands. The following conventions are used:

programmable controller, we assume you are familiar with

• A symbol or word in brackets represents a single key you would press.

These include keys such as [RETURN], [SHIFT] or [A].

• Punctuation, such as commas, and symbols such as “/” would be entered

as shown.

• ASCII codes are represented by either their mnemonic (CR, ETX, LF,

etc.) or their decimal number equivalent (CR =13, S=83, etc.). Refer to Appendix C for a listing of the ASCII codes.

Note: When the [RETURN] key is specified, this is the carriage return function of your keyboard. This key may also be labeled ENTER or use some other symbol.

1–2

We have included numerous examples of CRT displays. All CRT displays are shown inside a box with a double lined border. We have reproduced these screens as accurately as possible. However, due to legibility and space requirements we have modified some of the spacing.

When describing the programming terminal used to configure the decoder, we make reference to arrow keys. If you use an Allen–Bradley Industrial Terminal (Catalog No. 1770–T1, –T2, or –T3), you do not have arrow keys. Use the [CTRL] and [U], [D], [L], or [R] keys for the U

ight cursor functions, respectively.

p, Down, Left, or

Chapter 1

Using this Manual

Warnings And Cautions

Nomenclature

Related Publications

Description Title Purpose of Publication

Catalog Number

2755-ND002②

Both warnings and cautions are found in this manual and on the equipment. The following symbols are used:

WARNING: A warning symbol means people might be injured if the procedures are not followed.

CAUTION: A caution symbol is used when machinery could be damaged if the procedures are not followed.

This manual may contain some terms that you are not familiar with. We have provided a glossary of terms at the back of this manual (Appendix G) to assist you.

The following table lists related publications that you may require to install and operate the decoder.

User’s Manual for Bulletin 2755 Industrial Medium and High Speed Bar Code Scanners.

Provides information on the Catalog Number 2755-L7 and -L9 scan heads①.

Publication 2755-829②

Publication 2755-826②

Publication 2755-801②

Publication 2760-812

Publication 2760-822

Publication 2760-823

Publication

1771-6.5.34

Publication

1771-6.5.15

Publication

1771-6.5.13

① We have provided only a partial catalog number since there are various configurations available for these scan heads. ② Additional scan heads may be available for use with the Catalog Number 2755-DM9 decoder. Refer to your Allen-Bradley representative for more information.

User’s Manual for Bulletin 2755 Enhanced Medium Speed Scan Heads

User’s Manual for Bulletin 2755 Medium Speed Material Handling Scanners

User’s Manual for Bulletin 2755 Modular Bar Code Scanners

User’s Manual for Bulletin 2760–RB Flexible Interface Module

Protocol Cartridge Programming Manual Provides instruction on using the RS-232/RS-422

Protocol Cartridge Programming Manual Provides instruction on using the RS-485

BASIC Module User’s Manual Provides information on the Catalog Number

User’s Manual for 1771–KE and 1771–KF Provides information on the Catalog Number

ASCII I/O Module User’s Manual Provides information on the Catalog Number

Provides information on the Catalog Number 2755-L4F and -L4R enhanced scan heads①.

Provides information on the Catalog Number 2755-L4F and -L4R scan heads①.

Provides information on the Catalog Number 2755-L4 and -L5 scan heads①.

Provides information on the Catalog Number 2760-RB Flexible Interface Module.

protocol cartridge for the 2760-RB module.

1771-DB BASIC module.

1771-KE and -KF Communications Controllers.

1771-DA ASCII I/O module.

1–3

Chapter

Chapter Objectives

Differences between Catalog Number 2755-DM9 & 2755-DM9E

A–B

Description of Hardware

This chapter provides an overview of the Catalog Number 2755-DM9,

-DM9E Bar Code Decoder. We also provide descriptions of the major features.

Note: In this chapter and in subsequent chapters, we will refer to the Catalog Number 2755-DM9, -DM9E High Speed Decoder as the decoder.

• Catalog Number 2755-DM9 decoder includes a 120 VAC power cord, and

an English language manual. An LED label in English is attached to the decoder.

Features

• Catalog Number 2755-DM9E decoder includes an unterminated 220 VAC

line cord and information for ordering User’s Manuals in English and other languages. LED labels in English, French, German, Italian, and Spanish are packaged with the decoder. Operation of the 2755-DM9 and DM9E decoders is identical.

The decoder acquires video data from a separate laser scan head and then decodes this data. The decoder can then:

• Send the decoded data to another device such as a host computer,

auxiliary terminal, or programmable controller.

• Compare the decoded data to previously stored data and use the results of

this comparison to operate up to eight discrete outputs (match code operation).

Note: The decoder also maintains counters for package count, no-reads, and discrete outputs.

The decoder is capable of decoding the following types of bar code symbols:

• Code 39. • UPC-A and E

• Interleaved 2 of 5. • EAN-8 and 13

• Codabar. • Code 128.

2–1

Chapter 2

Description of Hardware

You can program many of the operating parameters of the decoder. This programming capability allows you to adapt the decoder to a specific application. You can:

• Specify decoder operating modes.

• Select types and lengths of symbols to be read.

• Select communications protocols used when communicating with a

computer or programmable controller.

• Enter up to eight match codes.

• Specify up to eight discrete outputs.

You can select continuous scanning or you can define what event will trigger the label reading process. You can specify the trigger to be:

• A signal from the package detector connected to the laser scan head.

• A command received from a host computer.

• The decoder’s internal timer.

The decoder can communicate with a host computer using the following standards:

Laser Scan Heads

Physical Description

• RS-232.

• RS-422.

• RS-485 (Multi-drop Network using Allen-Bradley DH485 protocol).

The decoder will operate with the following scan heads:

• Catalog No. 2755-L7 and -L9 Medium and High Speed, Industrial Bar

Code Scanners.

• Catalog No. 2755-L4F, -L4R, and -L5R Medium Speed, Enhanced,

Material Handling Scanners.

Note: We have not listed complete catalog numbers for the scan heads. These scan heads are available in a variety of configurations.

Figure 2.1 shows the decoder. The decoder is housed in a steel enclosure (NEMA 1 rating). The decoder enclosure is 14” wide, 2.81” tall, and 10.75” deep (refer to Chapter 5 for installation drawing). On top of the decoder are fourteen indicator LEDs which indicate the status of the decoder and the outputs (refer to Indicator Section in this chapter). On the back of the decoder are the communications ports (refer to Communications Port Section in this chapter). A separate removable cover allows for easy access to the discrete output modules and fuses (refer to Output Module Section in this chapter). Connectors are also provided for the laser scan head and power line connector cables.

2–2

(Continued)

Figure 2.1 Catalog Number 2755-DM9, -DM9E

Chapter 2

Description of Hardware

Indicators

90-061-1

Fourteen LED indicators (Figure 2.2) provide an indication of the decoder status. The indicators provide the following indications:

• POWER - This green indicator illuminates when power is applied to the

decoder.

• LASER ON - This red indicator illuminates when the decoder has enabled

the scan head to turn on the laser light source. The LED may illuminate even if the scan head is disconnected or the “Laser On” switch for the Catalog No. 2755-L7 or -L9 scan heads is in the OFF position.

• TRIGGER ACTIVE - This yellow indicator illuminates when the decoder

is in the triggered mode and scanning has been triggered by:

1. The package detector connected to the scan head.

2. A Start Scan command sent by the host.

3. The internal timer.

The LED remains on until a trigger OFF command is received.

• VALID READ - This green indicator illuminates momentarily whenever

the decoder has met the fields per scan and capture count parameters.

2–3

Chapter 2

Description of Hardware

Note: This LED may not correspond to a read output condition (refer to page 4-41). In the triggered mode, the read output condition must meet the fields per package parameter.

• CPU ACTIVE - This green indicator is continuously illuminated under

normal operation. Failure of the CPU ACTIVE indicator to illuminate is an indication of a hardware failure.

• COMMUNICATIONS - This yellow indicator illuminates momentarily

whenever data is sent to or received at either of the communications ports.

• OUTPUTS 1 through 8- Each of these red indicators indicate the status

of the output modules. When an output module is turned on, the respective indicator illuminates.

Note: If you have a Catalog No. 2755-DM9 decoder, the LED label is attached. If you have a Catalog No. 2755-DM9E decoder, the LED label is not attached. Apply the appropriate language label supplied with the decoder.

Figure 2.2 LED Indicators

2–4

90-061-5

Chapter 2

Description of Hardware

Communications Ports

There are two communication port connectors on the decoder:

• HOST port connector. The HOST port connector supports RS-232,

RS-422, and RS-485 communication interfaces. Through this port, you can link the decoder to a host computer or programmable controller. Both commands and data may be sent to/from the host device.

Note: The RS-485 interface allows the decoder to be installed as part of a multi-drop network. Refer to Chapter 3 for a more detailed description.

• AUX port connector. The AUX or auxiliary port connector allows you to

program and monitor the decoder using one of the following CRTs: Allen-Bradley Industrial Data Terminal (Catalog No. 1770-T1, -T2, and

-T3), Allen-Bradley T45 Laptop Terminal (Catalog No. 1784-T45), Digital VT100, Televideo 955, Lear Siegler ADM 3E, or a terminal/computer that emulates one of the terminals listed.

Figure 2.3 Communication Ports

90-061-2

2–5

Chapter 2

Description of Hardware

Output Modules

Two DC output modules (Catalog No. 1781-OB5S) are provided with the decoder. You can add up to six more AC or DC output modules for a total of eight. Module location #8 can also accept an input module for auto loading match codes (refer to Chapters 3 and 4). All output module types can be installed in any of the eight module slots. You can program the decoder to turn on these output modules based upon the conditions you specify during configuration of the decoder. Use these outputs to operate electromechanical devices such as relays, alarms, etc. Fuses protect the decoder from power overloads.

Figure 2.4 Output Modules

2–6

90-061-4

Chapter 2

Description of Hardware

The following output modules are available.

Note: Output modules function as a switch, not as a power source.

Catalog No. 1781-0B5S 1781-0A5S 1781-OM5S

Nominal Line Voltage

-- 120 VAC 240 VAC

Maximum Line Voltage

Minimum Line Voltage 3.0 VDC 12 VAC 24 VAC Maximum Peak Off State Voltage 60 VDC

Maximum Off-State Leakage

Static off-state dv/dt -- 200 V/ usec 200 V/ usec

Maximum On-State Current

Minimum On-State Current 10 mA DC 50 mA RMS 50 mA RMS

Maximum 1 Cycle Surge -- 4.0 A Peak 4.0 A Peak

Maximum 1 Second Surge

Peak On-State Voltage 1.5 V DC

60 VDC 140 VAC 280 VAC

400 V Peak 600 V Peak

1.0 mA 2.5 mA RMS 4.0 mA RMS

0.5 A DC 0.5 A RMS 0.5 A RMS

1.5 A DC -- --

1.6 V Peak 1.6 V Peak

The following input modules are available (for position No. 8 only). See Chapters 3 and 4.

Note: The input modules require a voltage source for activation.

Catalog No. 1781-IB5S 1781-IA5S 1781-IM5S

Maximum Input Voltage 32 VDC 140V RMS/AC 280 V RMS/AC Minimum Input Voltage

Input Resistance 1k ohm - Maximum Input Current 32mA DC @

Drop Out Current

Allowable Off State Input Current 1.0 mA DC 3.0 mA RMS 2.0 mA RMS Allowable Off State Input V oltage

3.3 VDC 90V RMS/AC 180 V RMS/AC

10mA RMS @

32 VDC

1.0 mA DC 2.5 mA RMS 1.5 mA RMS

2.0 VDC 50 VRMS/AC 120 VRMS/AC

140 VRMS

8mA RMS @

280 VRMS

Note: Note polarity when connecting DC Input and Output modules.

2–7

Chapter 2

Description of Hardware

Power and Scan Head Connectors

The decoder will accept line voltages from 85 to 264 volts AC at a frequency of 47 to 63 Hz without any adjustments. The Catalog No. 2755-DM9 decoder is supplied with a 120VAC rated power cord. If you are powering a 2755-DM9 decoder with a supply voltage greater than 120 VAC, you must obtain a suitable power cord.

Note: Catalog No. 2755-DM9E is supplied with an unterminated power cord. Attach a suitable connector using the diagram provided in Chapter 5.

A 15 pin D connector is provided on the decoder for connecting the laser scan head. You can connect the decoder to the scan head using one of the following:

• For Catalog No. 2755-L7 and -L9 scan heads use-

10 foot (3.05 meter) cable (Catalog No. 2755-CL10) 25 foot (7.62 meter) cable (Catalog No. 2755-CL25)

• For Catalog No. 2755-L4 and -L5 scan heads use-

10 foot (3.05 meter) cable (Catalog No. 2755-CK10) 25 foot (7.62 meter) cable (Catalog No. 2755-CK25)

Note: The scan head is powered by the decoder through the cable. The scan heads do not require a separate power source.

Figure 2.5 Input Power and Scan Head Connectors

90-061-4

2–8

Chapter 2

Description of Hardware

Accessories

The following table lists the accessories that you may require for use with the decoder.

Catalog Number Item Description

Raster and side scanning devices that operate at 350 scans per second. Raster scanners scan both vertical and horizontal directions

2755-L7①

2755-L9①

2755-L4F①

-L4R①

2755-L5R①

1781-OB5S DC Output Module 3 to 60 VDC output at 0.5 amperes. 1781-OA5S AC Output Module 12 to 140 VAC output at 0.5 amperes. 1781-OM5S AC Output Module 24 to 280 VAC output at 0.5 amperes. 1781-IB5S DC Input Module 3.3 to 32 VDC 1781-IA5S AC Input Module 90 to 140 VRMS/VDC 1781-IM5S AC Input Module 180 to 280 VRMS/VDC 2760-A485 RS-485 Connector Use these connectors to create cables for an RS-485 network. 2755-CL10 10-ft (3.05 meters) Scan Head Cable 2755-CL25 25-ft (7.62 meters) Scan Head Cable 2755-CK10 10-ft (3.05 meters) Scan Head Cable 2755-CK25 25-ft (7.62 meters) Scan Head Cable

W77104-899-01 Purchased

Locally Package

Detector Assembly

User Created Host Port Communications Cable For connecting host device to the decoder, refer to Chapter 6. User Created Auxiliary Port Communications Cable

W77121-801-01 W77121-801-02

Industrial Medium Speed Bar Code Scanner

Industrial High Speed Bar Code Scanner

Enhanced Medium Speed Scanner

Enhanced Medium Speed Raster Scanner

Replacement Fuse- Power Output Modules

Replacement Fuse- Line Input Power 250V ( 1 amp, slow blow), 5 x 20 mm or 3AG 2755-NP3

2755-NP5 2755-NP1 2755-NP4

Power Cords -

120 V AC 220 V AC- Unterminated one end

simultaneously. Some of these scan heads have a maximum read distance of 50” (1.27 meters) depending upon symbol size and quality. Scanners can read Case Code symbols (symbols directly printed on kraft paper/cardboard boxes).

Raster and side scanning devices that operate at 800 scans per second. Raster scanners scan both vertical and horizontal directions simultaneously. Some of these scan heads have a maximum read distance of 30” (76 cm) depending upon symbol size and quality .

Front or side scanners that operate at 200 scans per second. Some of these scan heads have a maximum read distance of 50” (1.27 meter) depending upon symbol size and quality . Scanners can read Case Code symbols (symbols directly printed on kraft paper/cardboard boxes).

Raster scanners that operate at 200 scans per second. This scan head has a maximum read distance of 45” (1.14 meters) depending upon symbol size and quality . Scan head scans both vertical and horizontal directions simultaneously. Scanner can read Case Code symbols (symbols directly printed on kraft paper/cardboard boxes).

Use to connect decoder to Catalog No. 2755-L7 or -L9 scan head.① Use to connect decoder to Catalog No. 2755-L7 or -L9 scan head.① Use to connect decoder to Catalog No. 2755-L4 or -L5 scan head.① Use to connect decoder to Catalog No. 2755-L4 or -L5 scan head.①

Plug-in type fuses provide overload protection for the decoder.

Optional, for 2755-L7, -L9 Scan Heads Optional, for 2755-L7, -L9 Scan Heads Optional, for 2755-L4, -L5 Scan Heads Optional, for 2755-L4, -L5 Scan Heads

For connecting programming terminal to the decoder. Refer to Appendix A.

Replacement power cord. User must provide suitable connector.

① We have not provided the complete catalog number since these heads are available in a variety of configurations.

2–9

Chapter

Chapter Objectives

How the Decoder Operates

A–B

How the Decoder Operates

This chapter provides a brief description of how the decoder operates. We also provide a brief description of how the decoder communicates with host devices.

Figure 3.1 is a block diagram of the decoder.

Figure 3.1 Catalog Number 2755-DM9 Decoder

DECODER

DATA

ACQUISITION

POWER SUPPLY - An internal power supply provides power for both the laser scan head and internal circuitry of the decoder. As stated earlier, the source voltage may range from 85 to 264 volts AC. The power supply will automatically adjust to the input voltage.

MICROPROCESSOR

POWER SUPPLY

I/O

LASER SCAN HEAD

DATA ACQUISITION CIRCUIT - The data acquisition circuitry of the decoder receives both video and synchronization signals from the laser scan head. The data acquisition circuitry filters and stores blocks of data received from the scan head in the Random Access Memory (RAM) of the decoder.

3–1

Chapter 3

How the Decoder Operates

MICROPROCESSOR - The microprocessor reads the information obtained by the data acquisition circuit, processes the information, and then makes decisions on what to do with the decoded data based upon your programming instructions.

I/O - A single 25 pin connector (HOST PORT) provides three different interfaces (RS-232, RS-422, and RS-485) for communications with a host computer or programmable controller. The I/O section of the decoder supports asynchronous data transmission at baud rates of up to 38,400 bits per second.

Another 25 pin connector (AUX PORT) provides an RS-232 interface for programming and monitoring of the decoder using a programming terminal. Refer to Chapter 2 for a listing of the terminals that can be used for programming or monitoring.

Up to eight modules can be plugged into the circuit board of the decoder. Refer to Chapter 2 for a description of the input and output modules that can be used. Output modules function as switches, not as power sources (refer to Figures 3.2 and 3.3).

Note: Outputs are initially turned off (open) when power is first applied to the decoder and when the decoder is turned off.

DC Output Module Application

Figure 3.2 illustrates a typical DC output module application. When using high impedance loads, you may have to add an additional resistor (Rx) in parallel with the load. Select a value for Rx that maintains a minimum current of 10 mA through the output module in the on state. Typical values for Rx range from 300 to 6,000 ohms depending upon the source voltage.

Figure 3.2 DC Output Module Application

DECODER

DC SOURCE 3-60 VDC

LOAD

DC OUTPUT MODULE

CONNECTOR BLOCK

FUSE

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How the Decoder Operates

AC Output Module Application

Figure 3.3 illustrates a typical AC output module application. When using high impedance loads, you may have to add an additional resistor (Rx) in parallel with the load. Select a value for Rx that maintains a minimum current of 50 mA RMS through the output module in the on state.

Figure 3.3 AC Output Module Application

DECODER

AC SOURCE

LOAD

AC OUTPUT MODULE

CONNECTOR BLOCK

FUSE

Input Module Auto Load Application

Figure 3.4 illustrates the auto load input module application.

Figure 3.4

Typical Input Module Auto Load Application

DECODER

Auto Load

CONNECTOR BLOCK

INPUT MODULE AC or DC

MODULE LOCATION #8 ONLY

FUSE

Pushbutton

Communications

AC or DC SOURCE

As stated earlier the decoder can transmit decoded bar code information to a host computer or programmable controller. The three communications

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How the Decoder Operates

interfaces (RS-232, RS-422, and RS-485) provide a variety of ways to accomplish communications with a host. Figure 3.5 illustrates some of the possible host interfaces.

Note: You can also use the decoder as a stand-alone device using the discrete outputs for control.

Figure 3.5 Communications Interface Examples

PLC

1771 I/O Rack

2760-RB

2760-SFC2

2755-DM9

Decoder

2755-DM9

Decoder

PLC TO DECODER USING A FLEXIBLE INTERFACE MODULE (RS-485)

2755-DM9

Decoder

2755-DM9

Decoder

2755-DM9

Decoder

PLC

PLC TO DECODER USING A FLEXIBLE INTERFACE MODULE (RS-232, RS-422)

• • • • • •

2755-DM9

Decoder

2755-DM9

Decoder

2755-DM9

Decoder

3–4

2755-DM9

Decoder

2755-DM9

Decoder

1771 I/O Rack

2760-RB

2760-SFC1

RS-232 or RS-422

2755-DM9

Decoder

Catalog No. 2760-RB is a Flexible Interface Catalog No. 2760-SFC1, -SFC2 are Protocol Cartridges

Chapter 3

How the Decoder Operates

Figure 3.5 Communications Interface Examples (Continued)

PLC TO DECODER USING AN ASCII MODULE

PLC

1771 I/O Rack

1771-DA

RS-232

2755-DM9

Decoder

COMPUTER TO DECODER

Host Computer

RS-232 or RS-422

2755-DM9

Decoder

PLC TO DECODER USING A BASIC MODULE

PLC

1771 I/O Rack

1771-DB

RS-232

2755-DM9

Decoder

Catalog No. 1771-DB is a BASIC I/O Module Catalog No. 1771-DA is an ASCII I/O Module

ALLEN-BRADLEY LOCAL-AREA NETWORK - Using the Catalog No. 2760-RB Flexible Interface Module with the 2760-SFC2 protocol cartridge and the DM9 in the RS-485 mode, you can multi-drop up to 31 devices on each port of the 2760-RB module.

PROGRAMMABLE CONTROLLERS - You can connect the decoder to a programmable logic controller in one of three ways:

• Through the Allen-Bradley Data Highway.

• Through a Flexible Interface Module (Catalog No. 2760-RB). This

module can be used to create an RS-485 Local Area Network or point-to-point communications using the RS-232 or RS-422 communications interfaces.

• Directly, using a Catalog No. 1771-DB BASIC module or 1771-DA

ASCII I/O module.

HOST COMPUTERS- In most cases, you can directly connect your host computer to the decoder using the RS-232 or RS-422 interface. The decoder can also communicate with an industrial computer through the Allen-Bradley Data Highway.

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RAM and EEPROM Memory

Before you try to change the operating configuration of the decoder, you should understand how configuration parameters are stored. The decoder has two types of memory:

• EEPROM- Electrically Erasable Programmable Read Only Memory

contains the “non-volatile” operating configuration of the decoder. The term “non-volatile” means that the memory is not lost when you turn the power off or restart the decoder.

• RAM- Random Access Memory contains the current operating

configuration of the decoder. Any changes made to the the operating configuration of the decoder are made to the decoder’s RAM. All information stored in the RAM is erased when the power to the decoder is turned off. When the decoder is turned back on (rebooted), the configuration parameters are copied from non-volatile memory (EEPROM) to the RAM.

Figure 3.6 illustrates the relationship between the RAM and EEPROM memory. Notice that the user interface is with the RAM memory. Also, notice that the decoder transfers the contents of the RAM to the EEPROM during a SAVE operation and copies the same contents from the EEPROM to RAM during startup.

Note: The configuration in RAM determines the decoder performance (operating characteristics).

Figure 3.6 Decoder Memory

3–6

Decoder

Performance

User Interface

RECALL START-UP

RESTART

RAM

EEPROM

SAVE

DEFAULT

Default

Configuration

Settings

-Programmer

-Host

When you change the operating configuration of the decoder, you are changing the configuration stored in the decoder’s RAM. Since the decoder takes its current operating instructions from RAM, any changes you make

Chapter 3

How the Decoder Operates

will become effective immediately (except for host communications parameters listed below). If you want to enter changes into the decoder’s permanent memory (EEPROM), you must use the SAVE command. When the decoder is restarted, the operating parameters of the EEPROM are transferred into RAM. If you don’t transfer the contents of the RAM to the EEPROM (SAVE function), any changes made to the operating configuration stored in RAM will be erased when the power is turned off.

Note: Unlike the other decoder operating parameters, changes to the following parameters will not take effect until you SAVE the changes and then restart the decoder.

• HOST PROTOCOL

• DEVICE ADDRESS

• ACK and NAK CHARACTERS①

Operating Modes

• BAUD RATE

• NUMBER OF DATA & STOP BITS

• PARITY

① Changes to ACK NAK characters will take effect immediately if you are in the ACK/NAK mode.

The decoder also stores the original factory set operating parameters in EPROM. This type of memory cannot be changed by the user, and is always available in case of a programming error. When you use a DEFAULT command (described in next chapter), the decoder transfers the factory set default parameters to the RAM. Once installed in RAM, the default parameters control the operation of the decoder. If you want to save the default parameters into the EEPROM, you must use the SAVE command.

A RECALL command (described in next chapter) transfers the previously SAVED configuration from the EEPROM to the decoder’s RAM. Once installed into RAM, the recalled configuration is displayed and controls operation of the decoder.

When you configure the operation of the decoder, you will be required to provide a variety of operating parameters. You should have an understanding of the decoder’s operating modes prior to configuring the decoder (Chapter

4). The decoder operates in one of two modes:

• Continuous mode - In this mode, the decoder will continuously attempt to

decode data. Use this mode for initial scan head adjustments and positioning.

• Triggered mode - In this mode, the decoder will only attempt to decode

data after receiving a trigger.

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In the triggered mode of operation, there are three possible trigger sources:

• Host command - The command is generated by a host computer or

programmable controller.

• Package detect - A package detector connected to the scan head is the

source for the trigger.

• Internal timer - The internal timer cycles the trigger from on to off based

on a timed interval.

Trigger Ending Coditions

Response Modes

When a trigger on is received, the decoder will continuously attempt to decode bar codes until one of the following trigger ending conditions occurs:

(a) The number of fields (bar codes) per package count is satisfied. (b) A trigger off command is sent by a host device. (c) Package detect signal is no longer present. (d) The internal timer (No-Read timer) times out.

In the triggered mode of operation there are two options which determine when the decoder will send bar code information to a host and/or operate discrete outputs:

• After Valid Package - A valid package is a package that has valid bar

code symbols and meets the fields (bar codes) per package count (condition

(a) listed above).

• End of Trigger - Refer to trigger ending conditions (b, c, d) listed above.

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Chapter

Chapter Objectives

Initial Programming of the Decoder

A–B

Configuring Your Decoder

Because the decoder can be used many ways, you will need to configure the decoder to meet the requirements of your application. To do this, you must make some decisions. We will show you how to use the menus and setup screens that appear on a programming terminal to select the options you need.

You must configure the decoder to meet the requirements of the application. You can configure the decoder either before or after installation. If you

change the configuration while a triggered decode is in progress, there is the possibility of missing a package and/or losing data.

Note: The default parameters for the decoder are given in Appendix B. If

these settings meet your requirements, you will not have to program the decoder.

You will need the following equipment:

1. Decoder with power cable.

2. One of the following programming terminals:

• Allen-Bradley Industrial Terminal (Catalog No.1770-T1, -T2, or -T3).

• Allen-Bradley T45 Laptop Terminal (Catalog No. 1784-T45).

• Lear Siegler 3E.

• Televideo 955.

• DEC VT-100.

• A terminal or personal computer that accurately emulates one of the

above.

3. A cable to connect your programming terminal to the decoder. Note: Prior to configuring your decoder, we suggest that you review the

description of how the decoder stores configuration data (refer to Chapter 3, RAM and EEPROM Memory descriptions).

Note: Refer to Appendix A for programming terminal setup. The programming terminal you use must be configured with the following parameters: Number of data bits: 8 Number of stop bits: 1 Baud rate: 9600 Parity: None Flow Control: XON / XOFF

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Programming Terminal Cable

Menus and Setup Screens

Programming of the decoder is done through the AUX connector on the back of the decoder. female, D type connector. Depending upon your programming terminal, most standard RS-232 communications cables will work. If you need to create a communications cable, refer to Appendix A.

You can program and/or monitor the operation of the decoder using the following CRT screens:

The AUX port connector on the decoder is a standard 25 pin,

• Select Language Screen - Use this screen to select English, French,

German, Italian, or Spanish language screens.

• CRT Select Menu - You use this menu to select the type of programming

terminal being used.

• Select operation Menu - Using this menu, you select one of six

operations:

1) Display Labels Screen- Displays bar code labels as they are decoded.

2) System Status Screen- Displays the status of the decoder.

3) Setup Screens Setup Screen 1- Use this screen to configure the host interface which

includes host message format, host communications parameters and protocol, and filtering of the package detect input.

Start-up Procedure

4–2

Setup Screen 2- Use this screen to configure the decoder for the bar

code symbologies, bar code lengths, scan head operation, match code settings, and configuration of output modules.

4) Reset Status and Counters

5) Restart System

6) Select Language Screen- This screen allows you to reselect one of the following languages:

• English

• French

• German

• Italian

• Spanish

After you have connected the programming terminal to the decoder and attached the power cord:

Step 1 - Turn ON the programming terminal and configure the terminal for communications with the decoder. Appendix A provides information on setting up the programming terminal.

Chapter 4

Configuring Y our Decoder

Step 2 - Turn the decoder ON. The green LEDs, labeled POWER ON and CPU ACTIVE, will light.

Step 3 - When the following screen appears, press the key that corresponds to the language you are using. All of the remaining screens will appear in the selected language.

SELECT LANGUAGE CHOIX DU LANGAGE WAEHLE SPRACHE

1) English 1) Anglais 1) Englisch

2) French 2) Francais 2) Franzoesisch

3) German 3) Allemand 3) Deutsch

4) Italian 4) Italien 4) Italienisch

5) Spanish 5) Espagnol 5) Spanisch

Press 1, 2, 3, 4, 5, or ESC Appuyer 1, 2, 3, 4, 5 ou ESC Drueck

e 1, 2, 3, 4, 5, oder ESC

SELEZIONARE LINGUA SELECCIONAR LENGUA

1) Inglese 1) Ingles

2) Francese 2) Frances

3) Tedesco 3) Aleman

4) Italiano 4) Italiano

5) Spangnolo 5) Castellano

Premere 1, 2, 3, 4, 5 o ESC Pulsar 1, 2, 3, 4, 5, o ESC

Step 4 - After selecting the language, the decoder will display the CRT select screen. Press the key (1, 2, 3, 4, or 5) that corresponds to the terminal you are using. Pressing the [ESC] key, will return you to the language selection screen.

SELECT CRT TYPE

1 - Allen-Bradley 1770 Industrial Terminal 2 - Allen-Bradley T45 Portable Terminal 3 - Lear Siegler ADM 3E 4 - Televideo 955 5 - Digital VT100

Press 1, 2, 3, 4, 5 or ESC

Step 5 - After selecting the CRT type, the decoder will display the select operation menu. The remaining displays that you will see depends upon the operation that you select.

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Select Operation Menu

After selecting the CRT type, the following Select Operation menu will appear:

SELECT OPERATION

1) Display Bar Code Labels

2) Display Status and Counters

3) Display/Change Configuration

4) Reset Status and Counters

5) Restart

6) Select Language

Press 1, 2, 3, 4, 5, 6, or ESC

The following are explanations of each operation listed on the Select Operation menu:

1) Display Bar Code Labels - This operating mode allows you to monitor bar code labels as they are being scanned. After selecting this operation by pressing the [1] key, bar code labels will be displayed as they are decoded. The display will scroll up as new labels appear on the bottom of the screen. If more than one label is decoded on the same scan, the labels will be displayed on the same line separated by a space. If a no-read condition occurs, the decoder will display the no-read message that you enter as part of the decoder configuration. Pressing the [ESC] key will exit this function. The following is an example of how the display bar code labels screen might appear:

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(Continued)

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19876367 3456721 59874292

45763019 56474821 10945280 45674895 7689577 87599039 35426881 11987454 54664778 87997070 56400982 54664747 09585746 7563778 53647747 87745646 35647465 6545456

2) Display Status and Counters - After selecting this operation by pressing the [2] key at the select operations menu, the decoder will display the following:

• Decoder Performance - The percentage of decodable scans over a 100

scan sample. The 100 scan sample is not made up of the raw scans from the scan head. Instead, the 100 scan sample is made up of scans which have passed through a “qualifier” circuit in the data acquisition circuitry. The “qualifier” circuit acts as a pre-filter that discards empty, partial, or noisy scans before decoding is attempted. Because of this, it is possible to have a high decoder performance even though only a small percentage of the scans are crossing the label (such as when a raster scan head is used or the label is moving). This display is only available if continuous trigger mode is selected and fields per package parameter (entered as part of configuration programming) is anything but “any”.

Note: You can use the decoder performance monitor during: Installation. By monitoring the percentage of good reads, you will be able to

determine the optimum location for the scan head in relation to the label(s) being read.

Operation. If the percentage of good reads drops significantly below what it was during installation, the scan head window may require cleaning or the label quality may have degraded.

• No-Read Counter - The number of No-Reads. This counter is

incremented each time a package start trigger is generated and a stop trigger occurs without a valid package. No-reads also occur when the decoder does not decode the correct number of fields on a package as

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specified by the fields per package configuration parameter. Data that is lost due to an overflow of the buffer does not increment this counter.

• Package Counter- The number of packages detected. This counter is

incremented each time a package trigger is generated by the scan head package detector, a host command, or the internal timer.

• Output Counters 1 through 8 - The number of times an output condition

has occurred.

The following is an example of how the display status and counters screen may appear:

Decoder Performance : 100% No-Read Counter : 10 Package Counter : 300

Output Counter 1 : 44 Output Counter 2 : 45 Output Counter 3 : 56 Output Counter 4 : 5 Output Counter 5 : 33 Output Counter 6 : 23 Output Counter 7 : 40 Output Counter 8 : 67

ESC to Exit

This screen is updated approximately once per second.

Press the [ESC] key to exit the function.

3) Display/Change Configuration- Pressing the [3] key at the operation menu will allow you to change the operating configuration of the decoder. Two setup screens are used to configure the decoder. Before entering the setup screens, the decoder will display a message asking you if you want the outputs disabled during configuration:

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CAUTION

Configuration changes may cause the discrete outputs to switch.

If outputs are to remain ENABLED, press ESC.

Otherwise press any other key to continue. Outputs will be DISABLED until the device is restarted.

Note: We recommend that you disable the outputs while configuring the decoder. This will prevent the outputs from being turned on unintentionally during changes to the configuration.

If you press any key other than the [ESC] key, the outputs will be disabled (off) during configuration. The outputs will remain disabled until you restart (refer to restart operation) or cycle the power off and then back on (remember to SAVE configuration first). If you press the [ESC] key, the outputs will remain enabled during configuration. After responding to the above message, the decoder will display the first of two setup screens:

------- MESSAGE FORMAT ------- ------- HOST COMM -------

_______________________________________

Commands: ESC Change: SPACE Cursor Control: ARROWS

_______________________________________

SEND BAR CODE DATA: Yes BAUD RATE: 9600

SEND PACKAGE COUNT: No BITS/CHAR: 8 Data, 1 Stop

SEND BAR CODE TYPE: No PARITY: None

SEND SOURCE IDENTIFIER: No

SEND HEADER MESSAGE: No ACK CHAR: None

SEND NO-READ MESSAGE: No NAK CHAR: None

START SCAN CHAR: None

EXPAND UPC-E: Yes STOP SCAN CHAR: None

SOURCE IDENTIFIER: LARGE BUFFER: No

LABEL DELIMITER: None RESPONSE MODE: End of Trigger

START CHAR: None HOST PROTOCOL: RS232

END MESSAGE: CRLF DEVICE ADDRESS: 01

TRANSMISSION CHECK: None

HEADER MESSAGE:

NO-READ MESSAGE:

CODE 39 CHECK CHAR: No SEND: No ---PACKAGE DETECT INPUT---

I 2-OF-5 CHECK CHAR: No SEND: No FILTER: No

CODABAR CHECK CHAR: No SEND: No SENSE: LO = Package

If you press the [ESC] key to select the command bar, you will notice that the NEXT PAGE command is highlighted in reverse video on the bottom of the screen. Press the [RETURN] key to enter the command. The decoder will then display the second setup screen, which looks like this:

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-- SYMBOLOGY -- -------- LENGTHS -------- -------- SCANNER CONTROL -------CODE 39: Yes 00 00 00 00 00 00 00 00 LASER-ON MODE: Continuous

I 2-OF-5: No 00 00 00 00 00 00 00 00 DECODE TRIGGER: Package Detect

CODE 128: No 00 00 00 00 00 00 00 00 CAPTURE COUNT: 2 (scans)

CODABAR: No 00 00 00 00 00 00 00 00 FIELDS/SCAN: 1

UPC-A: No FIELDS/PACKAGE: 1 UPC-E: No NO-READ TIMER: 0000 (msec)

EAN-8: No INTER-SCAN TIMER: 0000 (msec)

EAN-13: No MATCH COMPLETE: 1

---------MATCH CODE TABLE-------------- ----------- OUTPUTS [DISABLED]--------

1) CODE 39 N None 0000

2) CODE 39 N None 0000

3) CODE 39 N None 0000

4) CODE 39 N None 0000

5) CODE 39 N None 0000

6) CODE 39 N None 0000

7) CODE 39 N None 0000

8) CODE 39 N None 0000

_______________________________________

Commands: ESC Change: SPACE Cursor Control: ARROWS

_______________________________________

Note: The two setup screens display the current operating parameters of the decoder. Any changes made to the configuration will become effective immediately with the exception of the host communication parameters. In order for changes to the host port baud rate, stop bits, parity, host protocol, or device address to take effect, you must save the changes to the decoder’s EEPROM (SAVE command) and then restart. You can restart the decoder by pressing the [5] key (Restart System) at the Select Operation menu, through a host command, or by turning the power off and then back on.

In the following sections of this chapter we will provide a description of all the options available on the two setup screens. We will also provide a step-by-step programming example.

4) Reset Status and Counters- Pressing the [4] key at the operations menu will reset the package counter, no-read counter, and output counters. Prior to resetting the counters, the decoder will display a confirmation prompt:

RESET STATUS AND COUNTERS . . . Confirm (Y/N)

Press the [Y] key to confirm the reset. Pressing the [N] key will cancel the reset function.

4–8

5) Restart System- Pressing the [5] key at the select operation menu will reboot the decoder. This has the same effect as turning the power off and then back on. Prior to restarting the system, the decoder will display a confirmation prompt:

Chapter 4

Configuring Y our Decoder

RESTART SYSTEM . . . Confirm (Y/N)

Press the [Y] key to confirm the restart. Pressing the [N] key will cancel the restart function.

6) Select Language- Pressing the [6] key at the operations select menu will display the following menu:

SELECT LANGUAGE CHOIX DU LANGAGE WAEHLE SPRACHE

1) English 1) Anglais 1) Englisch

2) French 2) Francais 2) Franzoesisch

3) German 3) Allemand 3) Deutsch

4) Italian 4) Italien 4) Italienisch

5) Spanish 5) Espagnol 5) Spanisch

Using and Editing the Configuration (Setup) Screens

Press 1, 2, 3, 4, 5, or ESC Appuyer 1, 2, 3, 4, 5 ou ESC Drueck

e 1, 2, 3, 4, 5, oder ESC

SELEZIONARE LINGUA SELECCIONAR LENGUA

1) Inglese 1) Ingles

2) Francese 2) Frances

3) Tedesco 3) Aleman

4) Italiano 4) Italiano

5) Spangnolo 5) Castellano

Premere 1, 2, 3, 4, 5 o ESC Pulsar 1, 2, 3, 4, 5, o ESC

Press the key that corresponds with the language you want to use. After selecting the language, the decoder will return you to the CRT selection screen. All of the other screens will appear in the selected language.

When programming the decoder, use the two configuration (setup) screens to set operating parameters. There are two types of fields that you can change on the configuration screens:

• SELECT Fields - In the select fields, you have fixed selections such as

YES or NO. Pressing the [SPACE] bar multiple times will step through the selections available. Pressing the [RETURN] key will enter the selection.

• EDIT Fields - In the edit fields, you can enter strings of ASCII character

codes, numeric values, or text. Pressing the [SPACE] bar will open the field for changes and clear the current values. You can then enter new data. Pressing the [RETURN] key will close the field and enter the data Pressing the [ESC] key will cancel any changes, return the values back to the original contents when the field was opened, and close the field.

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To do this: You must: Comments

Depending upon the type of field (select or edit) that you are configuring, use the commands listed in Table 4.A:

Return to SELECT OPERA TION menu.

Change any field. Press [SPACE] bar.

Enter a new or different value. Press [RETURN] key.

Move to a different field.

Move to next menu.

Transfer new parameters into the Decoder’s memory (EEPROM).

Recall previously set parameters from the Decoder’s memory (EEPROM–User Definable).

Reset decoder to factory set parameters (EPROM–Defaults).

SAVE

RECALL

DEFAULT

Press the [ESC] key to select the command bar and then press the [ESC] key again.

Press [RETURN] key or arrow keys.① See note ① below. Press [ESC] key to select the command

bar and press the [RETURN] key. Press [ESC] key to select command bar.

Use [SPACE] bar to select SA VE and press the [RETURN] key. Press [Y] key at confirmation prompt.

Press [ESC] key to select command bar. Use [SPACE] bar to select RECALL and press the [RETURN] key. Press [Y] key at confirmation prompt.

Press [ESC] key to select command bar. Use [SPACE] bar to select DEFAULT and press the [RETURN] key. Press [Y] key at confirmation prompt.

In select fields, next option is displayed. In edit fields, field is cleared and new data can be entered.

New value is highlighted in reverse video.

New configuration parameters are transferred to the decoder’s EEPROM.

Previously set parameters are displayed.

Refer to Appendix B for factory set parameters.

① Allen-Bradley Industrial Terminals (Catalog Number 1770-T1, -T2, or -T3) do not have arrow keys. Use the [CTRL] and U, D, L or R keys for Up, Down, Left or Right cursor

movement.

EDIT FIELDS - There are three types of data that can be entered or modified in an edit field:

1) ASCII character codes-(decimal values 0 to 255)

2) Numeric values

3) Text strings To open an edit field for a change, press the [SPACE] key. The cleared field

will appear as a block in reverse video and the decoder will display the edit keys you can use at the bottom of the screen. All other keys will be ignored:

EDIT -- Cancel:ESC Enter:RETURN Erase Char: BACKSPACE

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Type in the new data and press the [RETURN] key to close the field and enter the data.

Note: Pressing the [ESC] key while you are entering data in an edit field will return the contents of the field back to the original contents prior to editing.

When you enter a value in a field that requires an ASCII decimal value, you have three options:

1) You can enter the decimal (numeric) equivalent value (refer to Appendix C). After entering the decimal value, the selected ASCII character will be displayed.

2) You can enter the ASCII character (non-numeric only) such as “T”. The decoder will automatically enter the decimal equivalent value (T = 84).

3) If you press the [RETURN] key when the field is empty, “NONE” is displayed (no ASCII value is defined). A decimal value of 255 is also interpreted as “NONE”.

You can enter non-printable ASCII control characters into the following edit fields:

• Source Identification Message

• Header Message

• No-Read Message

• Match Table Entry

To enter non-printable ASCII control characters (ASCII 0 through 31) into a text string, refer to Table 4.B. For example: to enter carriage return and line feed control characters, you would enter %M%J. The decoder will interpret %M%J as the ASCII control characters CR and LF. The % character is equivalent to ASCII 37 (decimal). Non-printable control characters are always entered as a two character sequence and the second character must be listed in Table 4.B. To enter the character %, you must use %%.

Note: Some fields have restrictions on the type of data that you can enter. For example: numeric values only are allowed in the inter-scan timer field. If you attempt to enter an invalid character, you will hear a beep. Numeric values are also checked for range (min and max values) when the [RETURN] key is pressed. An audible beep indicates a value is out of the specified range. To correct an entry, you can either:

• Delete the incorrect entry by using the backspace, left arrow, [CTRL] [L],

or rubout keys.

• Press the [ESC] key once to return the field back to its original contents.

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ASCII Control

Character

NUL %@ VT %K SYN %V

SOH %A FF %L ETB %W

STX %B CR %M CAN %X

ETX %C SO %N EM %Y EOT %D SI %O SUB %Z ENQ %E DLE %P ESC %[ ACK %F DC1 %Q FS %\

BEL %G DC2 %R GS %]

BS %H DC3 %S HT %I DC4 %T US %

LF %J NAK %U

Enter:

ASCII Control

Character

Enter:

ASCII Control

Character

SELECT FIELDS- To change the contents of a select field, press the [SPACE] key. After pressing the [SPACE] key, he next option is displayed and the decoder will display the control keys you can use at the bottom of the screen. All other keys are ignored:

SELECT -- Cancel:ESC Change:SPACE Enter:RETURN

Enter:

∧

Command Bar

4–12

Press the [SPACE] key again until the option you want is displayed. Press the [RETURN] key to enter the selected option.

When you first enter either setup screen you will observe the following at the bottom of the display:

Change:SP ACE Cursor Control: ARROWSCommands : ESC

Notice that the command bar display provides a quick reference to the commands used to edit the setup screen. If you select the command bar by pressing the [ESC] key, the following will be displayed:

COMMAND - - Exit: ESC Select: RETURN Next Command: SPACE

THIS PAGE RECALL SAVE DEFAULT

After selecting the command bar, you will notice that the first command option NEXT PAGE is highlighted in reverse video. To display the other

Chapter 4

Configuring Y our Decoder

(next) setup screen you would press the [RETURN] key. To select another of the displayed commands, press the [SPACE] key until the desired command is highlighted and then press the [RETURN] key. Pressing the [ESC] key after selecting the command bar will return you to the select operation menu. The following are explanations of each command in the command bar:

• NEXT PAGE - Selecting this command will display the other setup

screen. Remember that there are two setup screens used to configure the decoder.

• THIS PAGE - Selecting this command will return you to the top of the

current setup screen.

• RECALL - Selecting this command will recall all the previously SAVED

configuration parameters from the decoder’s Electrically Erasable Programmable Read Only Memory (EEPROM) to the decoder’s Random Access Memory (RAM). Once moved into the decoder’s RAM, the recalled configuration is displayed and controls the operation of the decoder.

• SAVE - Selecting this command will save all the configuration parameters

to the decoder’s EEPROM. You must use the save function after programming, or the decoder’s operating configuration will revert back to the original configuration after a restart (or power loss) of the decoder.

• DEFAULT - Selecting this command will change the setup to the factory

default selections. Refer to Appendix B for the default parameters. If the default values meet the requirements of your application, you do not have to program the decoder.

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Chapter 4

Configuring Y our Decoder

Setup Screen #1

Figure 4.1 shows the first setup screen. The first setup screen configures the communication parameters and host protocol. We have used lowercase letters to indicate fields of the configuration data. These letters are keyed to Table 4.C, listing the options available for each field type. Following the table is a short description of the effect each option has on the decoder operation.

Figure 4.1 Setup Screen #1

----------- MESSAGE FORMAT ----------- ----------- HOST COMM -----------

SEND BAR CODE DATA: a BAUD RATE: u

SEND PACKAGE COUNT: b BITS/CHAR: v

SEND BAR CODE TYPE: c PARITY: w

SEND SOURCE IDENTIFIER: d

SEND HEADER MESSAGE: e ACK CHAR: x

SEND NO-READ MESSAGE: f NAK CHAR: y

START SCAN CHAR: z

EXPAND UPC-E: g STOP SCAN CHAR: aa

SOURCE IDENTIFIER: h LARGE BUFFER: bb

LABEL DELIMITER: i RESPONSE MODE: cc

START CHAR: j HOST PROTOCOL: dd

END MESSAGE: k DEVICE ADDRESS: ee

TRANSMISSION CHECK: l

HEADER MESSAGE: m

NO-READ MESSAGE: n

CODE 39 CHECK CHAR: o SEND: p ---PACKAGE DETECT INPUT---

I 2-OF-5 CHECK CHAR:

CODABAR CHECK CHAR: s SEND: t SENSE: gg

q SEND: r FILTER: ff

4–14

Commands: ESC Change: SPACE Cursor Control: ARROWS

Chapter 4

Configuring Y our Decoder

Reference

Letter

a b c d e

g h

Description

Send bar code field data to host. Send package count to host.

Send bar code type indicator to host.

Send source identification string to host. Send header message to host. Select Yes or No N/A

Send no–read message to host, if no–read.

Expand UPC–E bar codes. Select Yes or No N/A Source identification message. Edit N/A Up to four ASCII

Label delimiter character. Edit N/A Numeric ASCII code ( 0 to

Start character. Edit N/A Numeric ASCII code ( 0 to

End of message. Select None, CRLF, CR, LF,

Field T ype

Select Yes or No N/A Select Yes or No N/A Select Yes or No N/A Select Yes or No N/A

Select Yes or No N/A

Options (Select Field

Only)

ETX

Valid Entries (Edit Field

Only)

characters.①

255) 255 = None. Refer to Appendix C.

N/A

o p q

① You can enter non-printable characters in these fields, refer to the table on page 4-12.

Transmission check method. Select None, LRC,

Header message. Edit N/A Up to 32 ASCII

No–read message. Edit N/A Up to 32 ASCII

Employ check character for Code 39. Select Yes or No N/A Send Code 39 check character. Select Yes or No N/A Employ check character for Interleaved

2–of–5. Send Interleaved 2–of–5 check

character.

Employ check character for Codabar. Select Yes or No N/A

Send Codabar check character. Select Yes or No N/A

N/A Checksum–LSB, Checksum–MSB

characters.①

Select Yes or No N/A

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Reference

Letter

bb cc

Description

Host port–baud rate. Select 300, 1200, 2400, 4800,

Host port–number of data and stop bits. Select

Host port–parity. Select None, Odd, or Even N/A Host port–ACK character. Edit N/A Numeric ASCII code ( 0 to

Host Port–NAK character. Edit N/A Numeric ASCII code ( 0 to

Host port–start scan character. Edit N/A Numeric ASCII code ( 0 to

Host port–stop scan character. Edit N/A Numeric ASCII code ( 0 to

Enable host port buffer (8k bytes). Select Yes or No N/A Response mode. Select

Field T ype

Options (Select Field

Only)

9600, 19200, 38400 8 data, 1 stop

8 data, 2 stop 7 data, 1 stop 7 data, 2 stop

End of Trigger, or After V alid Package.

Valid Entries (Edit Field

Only)

N/A

255) 255 = None.②

255) 255 = None. ②

255) 255 = None.②

N/A

① Refer to Chapter 6 for a description of the RS-232 modes 3 and 4. Both of these modes use the modem control lines (RTS, CTS and DTR). However, there are differences in

how these control lines are used.

② Refer to Appendix C for ASCII conversion chart.

4–16

Host protocol. Select RS232 No flow control

RS232 XON/XOFF RS232 RTS/CTS–1① RS232 RTS/CTS–2① RS422 No flow control RS422 XON/XOFF RS485 PCCC–1

PCCC with write replies

RS485 PCCC–2

PCCC without write replies RS485 ASCII–1 ASCII Commands with command responses RS485 ASCII–2 ASCII Commands without

command responses Device address for Class 1 node. Edit N/A 00 through 31 Enable package detect filter. Select Yes or No N/A Package detect polarity (sense). Select LO = Package

HI = Package

N/A

Chapter 4

Configuring Y our Decoder

Setup Screen #1 Fields

The following are detailed explanations of the fields on setup screen #1. We have provided reference letters (a through gg) which are keyed to Table 4.C and Figure 4.2.

Note: Fields with reference letters (a) through (t) control the format of bar code data that is sent to a host device. Refer to Figure 6.5 for an illustration of the data format. Table 6.A provides a short explanation of each field in a data message.

Message Format

SEND BAR CODE DATA (a) - Selecting YES for this field will enable the decoder to transmit the bar code data message to the host (refer to Figure

6.5). The bar code data message will not be sent to a host if you select NO. SEND PACKAGE COUNT (b) - Selecting YES for this field will enable

the decoder to transmit the contents of the package counter to the host. Package counts will not be sent if NO is selected. Refer to Figure 6.5, item #14.

SEND BAR CODE TYPE (c) - Selecting YES for this field will enable the decoder to transmit the type of code being decoded (Codabar, Code 39, etc) to the host. Bar code type will not be sent if NO is selected. Bar code type is transmitted as a 2 digit code, refer to Table 6.A. Figure 6.5, item #5 illustrates the position of the data in the data message.

SEND SOURCE IDENT (d) - Selecting YES for this field will enable the decoder to transmit the contents of the SOURCE IDENT field to the host. Source identification will not be sent if NO is selected. Refer to Figure 6.5, item #2.

SEND HEADER MESSAGE (e) - Selecting YES for this field will enable the decoder to transmit the contents of the HEADER MESSAGE field to the host. Header message will not be sent if NO is selected. Refer to Figure 6.5, item #3.

SEND NO-READ MESSAGE (f) - Selecting YES for this field will enable the decoder to transmit the contents of the NO-READ MESSAGE field to the host whenever a no-read occurs. The no-read message will not be sent if NO is selected. Refer to Figure 6.5, item #8.

EXPAND UPC-E (g) - Selecting YES for this field will result in UPC-E being transmitted in a 12 digit (expanded) format. UPC-E will be transmitted in a 6 digit (compressed) format if NO is selected.

SOURCE IDENT (h) - You can enter one of two options:

1) The identification label you want sent to a host with each communication (Send Source Ident selected). This entry is limited to 4 ASCII characters. Refer to Figure 6.5, item #2.

2) Leave field blank.

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LABEL DELIMITER (i) - You can enter one of two options:

1) The label delimiter characters being used. These characters indicate the beginning and end of bar code label information. Refer to Table 6.A for a more detailed description. Refer to Figure 6.5, items #4,#12, and #13. The host can use this character as a marker between fields to sort out the data.

2) 255 = None. START CHAR (j) - You can enter one of two options:

1) The start character you want to specify. Refer to Figure 6.5, item #1.

2) 255 = None. END MESSAGE (k) - Refer to Figure 6.5, item #15. You can select one of

five options:

1) CRLF. Selecting CRLF will send the ASCII control codes CRLF at the end of the transmission.

2) CR. Selecting CR will send the ASCII control code CR at the end of the transmission.

3) LF. Selecting LF will send the ASCII control code LF at the end of the transmission.

4) ETX. Selecting ETX will send the ASCII control code ETX at the end of the transmission.

5) None. TRANSMISSION CHECK (l) - When enabled, the transmission check

characters follow the end of message character(s). Refer to Figure 6.5, item #16. You can select one of four options:

1) LRC (Longitudinal Redundancy Check). Selecting 8-BIT LRC will cause the decoder to verify transmissions using the Longitudinal Redundancy Check method (exclusive OR of all bytes in the message).

2) Checksum-LSB (Least Significant Byte). Selecting LSB SUM-16 will cause the decoder to verify transmissions using the checksum method (sum of all message bytes) with the least significant byte transmitted first.

4–18

3) Checksum-MSB (Most Significant Byte). Selecting MSB SUM-16 will cause the decoder to verify transmissions using the checksum method (sum of all message bytes) with the most significant byte transmitted first.

4) None. Note: If you select one of the transmission check options, do not use

XON/XOFF flow control. There is the possibility of the transmission check bytes being interpreted as an XOFF character.

Chapter 4

Configuring Y our Decoder

Note: If you want more information on how check characters are generated and what they mean, refer to Appendix F.

HEADER MESSAGE (m) - Refer to Figure 6.5, item #3. You can enter one of two options:

1) The header message you want sent to a host (Send Header Message selected). This entry is limited to 32 ASCII characters.

2) Leave field blank (none). NO-READ MESSAGE (n) - Refer to Figure 6.5, item #8. You can enter

one of two options:

1) The no-read message you want sent with each no-read (Send No-Read Message selected). This entry is limited to 32 ASCII characters.

2) Leave field blank (none).

Data Check Characters

CODE 39 CHECK CHAR (o) - Selecting YES for this field will enable the decoder to compute and verify a code check character for Code 39 bar codes. The code check character ensures that the data is read correctly. If NO is selected, the decoder will assume that a check character does not exist. Refer to Figure 6.5, item #9.

Note: The Code 39 check character is computed as a Modulus 43 sum of all character values as specified in AIM specification USS-39. AIM is an acronym for Automatic Identification Manufacturers.

SEND CODE 39 CHECK CHARACTER (p) - Selecting YES for this field will enable the decoder to transmit the code check character with the bar code data. A code check character will not be sent if NO is selected. Refer to Figure 6.5, item #9.

I 2-OF-5 CHECK CHAR (q) - Selecting YES for this field will enable the decoder to compute and verify a code check character for Interleaved 2-of-5 bar codes. The code check character ensures that the data is read correctly. If NO is selected, the decoder will assume that a check character does not exist. Refer to Figure 6.5, item #9.

Note: The Interleaved 2-of-5 check character is computed as a Modulus 10 sum of all character values as specified in AIM specification USS-I 2/5.

SEND I 2-OF-5 CHECK CHARACTER (r)- Selecting YES for this field will enable the decoder to transmit the code check character with the bar code data. A code check character will not be sent if NO is selected. Refer to Figure 6.5, item #9.

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CODABAR CHECK CHAR (s)- Selecting YES for this field will enable the decoder to compute and verify a code check character for Codabar bar codes. The code check character ensures that the data is read correctly. If NO is selected, the decoder will assume that a check character does not exist. Refer to Figure 6.5, item #9.

Note: The Codabar check character is computed as a Modulus 16 sum of all character values as specified in AIM specification USS-Codabar.

SEND CODABAR CHECK CHARACTER (t) - Selecting YES for this field will enable the decoder to transmit the code check character with the bar code data. A code check character will not be sent if NO is selected. Refer to Figure 6.5, item #9.

Host Communications

Note: Unlike the other decoder operating parameters, changes to the following parameters will not take effect until you SAVE the changes, and then restart the decoder: HOST PROTOCOL, DEVICE ADDRESS, ACK and NAK CHARACTERS, BAUD RATE, NUMBER OF DATA & STOP BITS, PARITY.

BAUD RATE (u) - This field sets the baud rate at the HOST port connector. You can select one of seven baud rates:

1) 300

2) 1200

3) 2400

4) 4800

5) 9600

6) 19200

7) 38400 BITS/CHAR (v) - This field sets the number of data and stop bits sent with

each character. You can select one of the following:

8 Data, 1 Stop 8 Data, 2 Stop 7 Data, 1 Stop 7 Data, 2 Stop

4–20

PARITY (w) - This field defines the parity bit for each character transmitted or received at the host port. You can select None, Odd, or Even parity.

ACK CHAR (x) - This field sets the Positive Acknowledgment character used in ACK/NAK protocol. The ACK character is sent by the host to acknowledge receipt of a message. You have one of two options:

Chapter 4

Configuring Y our Decoder

1) The ACK character you will be using. This entry is in decimal ASCII code (0 through 254). Refer to Appendix C for ASCII coding.

2) 255 = None Note: Any command that the decoder receives from the host is also

interpreted as a positive acknowledgment (ACK). NAK CHAR (y) - This field sets the Negative Acknowledgment character

used in ACK/NAK protocol. The NAK character is sent by the host, when a message is not received properly, to prompt a retry. You have one of two options:

1) The NAK character you will be using. This entry is in decimal ASCII code (0 through 254). Refer to Appendix C for ASCII coding.

2) 255 = None Note: You must specify both an ACK and NAK character when using

ACK/NAK protocol. ACK/NAK protocol is usually used in conjunction with the transmission check and provides error detection. The ACK/NAK protocol can also be used to provide flow control. ACK/NAK protocol only applies to the bar code data that is sent to a host.

When using the ACK/NAK protocol, the decoder will hold the last transmitted bar code data message until an ACK character is sent. A NAK character informs the decoder to retransmit the last message (up to three times).

START SCAN CHARACTER (z) - This field sets the character which will inform the decoder to begin scanning. Scanning will continue until a decodable label is found or the host sends a stop scan character. You have two options:

1) The start scan character you will be using. This entry is in decimal ASCII code (0 through 254). Refer to Appendix C for ASCII coding.

2) 255 = None Note: The Decode Trigger Mode (on second setup screen) must be set for

Host Command. STOP SCAN CHARACTER (aa) - This field sets the character which will

inform the decoder to stop scanning and is used in conjunction with the Start Scan character. You have two options:

1) The stop scan character you will be using. This entry is a decimal number for the ASCII character (0 through 254). Refer to Appendix C for ASCII coding.

2) 255 = None

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Note: The Decode Trigger Mode (on second setup screen) must be set for Host Command.

ENABLE HOST PORT BUFFER (bb) - Selecting YES will enable an 8K buffer on the transmitter of the host port. This buffer allows the decoder to decode and buffer messages to the host. You should use this feature in applications where the host may be incapable of handling high burst rates of data from the decoder. If NO is selected, the decoder will only buffer one message.

RESPONSE MODE (cc) - The response mode specifies when the decoder will send data to a host or activate an output module. In the triggered mode of operation, you have two response options you can select:

1) End of Trigger - Selecting End of Trigger response will cause the decoder to transmit data or activate discrete outputs after the end of a trigger. The end of the trigger is determined by the triggering mode and may occur when:

• Package detector no longer detects a package.

• Trigger Off signal is received from the host.

• Trigger is timed out by no-read timer.

2) After Valid Package - Selecting After Valid Package will cause the decoder to transmit data or activate output modules immediately following a valid package (fields per package count satisfied) or after a no-read is detected.

If a valid package is never decoded, outputs and transmission of data occur at the end of the trigger, as stated above.

HOST PROTOCOL (dd)- You can select one of ten options:

1) RS232: No flow control is selected.

2) RS232 XON/XOFF: XON/XOFF flow control is selected.

3) RS232 RTS/CTS-1: Modem controls (Request to Send-RTS, Clear to Send-CTS, and Data Terminal Ready-DTR) are used. A description of these control lines is provided in Chapter 6.

Note: The decoder has two modes of host communication which use the modem control lines CTS, RTS, and DTR. RS-232 RTS/CTS-1 provides flow control of communications from the decoder to the host. RS-232 RTS/CTS-2 provides bi-directional flow control. When communicating with a 2760-RA or 2760-RB communications device that has modem controls enabled, you must use RS232 RTS/CTS-2.

4–22

4) RS232 RTS/CTS-2: Modem controls (Request to Send-RTS, Clear to Send-CTS, and Data Terminal Ready-DTR) are used. A description of these control lines is provided in Chapter 6. Use RS-232 RTS/CTS-2 when you connect the decoder to a 2760-RA or -RB that has modem controls enabled.

Chapter 4

Configuring Y our Decoder

5) RS422: No flow control is selected.

6) RS422 XON/XOFF: XON/XOFF flow control is selected.

7) RS485 PCCC-1: PCCC Commands, with Write Replies.

8) RS485 PCCC-2: PCCC Commands, Without Write Replies.

9) RS485 ASCII-1: ASCII Commands with Responses.

10) RS485 ASCII-2: ASCII Commands without Responses. DEVICE ADDRESS (ee) - You must specify an address when you use the

RS-485 LAN. Each device on the network must have a unique address. You can enter a numeric value in the range of 0 to 31 for the decoder address.

Package Detect Input

INPUT FILTER (ff) - Selecting YES will enable a debounce filter on the package detect sensor input from the scan head. Any package detect signal less than 10 msec will be ignored. To trigger the decoder, a continuous package detect input of at least 20 msec should be provided. The input filter will be disabled if NO is selected.

Note: When using the package detector as a trigger source and input filter is enabled, make sure that the detect signal is of long enough duration to allow for both adequate scanning and 20 msec filter. For example: Assuming you are using a 800 scan/sec head and you want at least 5 scans, the package detect must be on for at least 27 msec (20 msec + 5 scans x 1.25 msec/scan).

SENSE (gg) - This field determines whether a package is detected when the voltage at the package detect input is High or Low. You can select one of two options:

1) LO = Package Present

2) HI = Package Present

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Chapter 4

Configuring Y our Decoder

Setup Screen #2

Figure 4.2 shows the second setup screen. We have used lowercase letters to indicate fields of the configuration data. These letters are keyed to the table on Page 4-25 and 4-26 which lists the options available for each field type. Following the table is a short description of the effect each option has on the operation of the decoder.

Figure 4.2 Setup Screen #2

-- SYMBOLOGY -- -------- LENGTHS -------- -------- SCANNER CONTROL -------CODE 39: a i i i i i i i i LASER-ON MODE: m

I 2-OF-5: b j j j j j j j j DECODE TRIGGER: n

CODE 128: c k k k k k k k k CAPTURE COUNT: o (scans)

CODABAR: d l l l l l l l l FIELDS/SCAN: p

UPC-A: e FIELDS/PACKAGE: q UPC-E: f NO-READ TIMER: r (msec)

EAN-8: g INTER-SCAN TIMER: s (msec)

EAN-13: h MATCH COMPLETE: t

-----------MATCH CODE TABLE------------- ------------- OUTPUTS [ z ]-------------

1) u v w x y

2) u v w x y

3) u v w x y

4) u v w x y

5) u v w x y

6) u v w x y

7) u v w x y

8) u v w x y

Reference

Letter

a b c d e

f g h

4–24

Commands: ESC Change: SPACE Cursor Control: ARROWS

Description

Code 39 symbology enable. Interleaved 2–of–5 symbology enable. Code 128 symbology enable Codabar symbology enable.

Field Type

Select Yes or No N/A Select Yes or No N/A Select Yes or No N/A Select Yes or No N/A

Options (Select Field

Only)

Valid Entries (Edit Field

Only)

UPC–A symbology enable. Select Yes or No N/A UPC–E symbology enable. Select Yes or No N/A EAN–8 symbology enable. Select Yes or No N/A EAN–13 symbology enable. Select Yes or No N/A Specified code lengths for Code 39.

Includes check character. Does not include start and stop characters.

Edit N/A Numeric entries from 0

through 64. 0 indicates no length check.

Chapter 4

Configuring Y our Decoder

Reference

Letter

Description

Specified code lengths for Interleaved 2–of–5. Includes check character.

Specified code lengths for Code 128. Does not include start, stop, or check characters.

Specified code lengths for Codabar. Includes start, stop, and check characters.

Laser–On mode select. Select Continuous or

Trigger select. Select Package Detect, Host

Capture count. Edit N/A Numeric value from 1

Number of bar code fields per scan.

Field T ype

Edit N/A Even numeric entries from

Edit N/A Numeric entries from 0

Select 1, 2, 3, 4 or Any N/A

Options (Select Field

Only)

Triggered.

Command, Internal Timer, Continuous.

Valid Entries (Edit Field

Only)

0 through 64. 0 indicates no length check. Must be even number.

through 64. 0 indicates no length check.

N/A

through 8.

Number of bar code fields per package. Edit N/A Numeric value from 1

through 8.

No–read timer (milliseconds). Edit N/A Numeric value from 10

through 9999. 0 indicates no timer.

Inter–scan timer (milliseconds). Edit N/A Numeric value from 10

through 9999. 0 indicates no timer.

Match complete count. Edit N/A Numeric value from 1

through 8.

Bar code symbology for match code operation.

Enable for match code operation. Select

Select Code 39,

Interleaved 2–of–5, Code 128, Codabar, UPC–A, UPC–E, EAN–8, EAN–13

Y or N

N/A

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Chapter 4

Configuring Y our Decoder

Reference

Letter

① Y ou can enter non-printable control characters in this field, refer to the table on Page 4-12. ② Auto Load and Auto Load (INPUT) will not turn an output on or off. The decoder will change an auto load field to Match Entry in table after the

auto load.

③ Auto Load (INPUT) only applies to the #8 module position.

Match table entry. Edit N/A Any ASCII character string

Conditions for Output. Select None,

Duration of output pulse (milliseconds). Edit N/A Numeric value from 10

Output Condition. N/A N/A Outputs are enabled or

Description

Field T ype

Options (Select Field

Only)

Match Entry In Table, Match–Complete, Read (Package), No–Read (Package), Read and No–Match, No–Read or No–Match, Auto Load Auto Load (INPUT)②③

Valid Entries (Edit Field

Only)

up to 32 characters maximum. The ? character will result in a match with any ASCII character.①

N/A

through 9999. 0 indicates no pulse.

disabled by responding to the prompt prior to entering the configuration screens, refer to page 4–8.

Setup Screen #2 Fields

4–26

Bar Code Types

CODE 39 ENABLE (a) - Selecting YES will enable the decoder to decode Code 39 bar code labels. Code 39 bar code labels will not be decoded if NO is selected.

INTERLEAVED 2-OF-5 ENABLE (b) - Selecting YES will enable the decoder to decode Interleaved 2-of-5 bar code labels. Interleaved 2-of-5 bar code labels will not be decoded if NO is selected.

Note: Case Code labels are read as two separate Interleaved 2-of-5 labels; ie. 2 fields per scan.

CODE 128 ENABLE (c) - Selecting YES will enable the decoder to decode Code 128 bar code labels. Code 128 bar code labels will not be decoded if NO is selected.

Chapter 4

Configuring Y our Decoder

CODABAR ENABLE (d) - Selecting YES will enable the decoder to decode Codabar bar code labels. Codabar bar code labels will not be decoded if NO is selected.

UPC-A ENABLE (e) - Selecting YES will enable the decoder to decode UPC-A bar code labels. UPC-A bar code labels will not be decoded if NO is selected.

UPC-E ENABLE (f) - Selecting YES will enable the decoder to decode UPC-E bar code labels. UPC-E bar code labels will not be decoded if NO is selected.

EAN-8 ENABLE (g) - Selecting YES will enable the decoder to decode EAN-8 bar code labels. EAN-8 bar code labels will not be decoded if NO is selected.

EAN-13 ENABLE (h) - Selecting YES will enable the decoder to decode EAN-13 bar code labels. EAN-13 bar code labels will not be decoded if NO is selected.

Note: The decoder ignores (will not decode) UPC and EAN supplements. Note: If you enable more than one symbology, the decoder will

autodiscriminate between the symbologies. For optimum decoder performance, we recommend that you only enable the symbologies that you want to decode.

Code Lengths

LENGTHS-CODE 39 (i) - You can specify up to 8 code lengths (maximum of 64 characters) for Code 39 bar code labels. The code length includes the check character but not the start and stop characters . If you do not want to specify a code length, enter a zero (any lengths to the right of zero are ignored).

Note: Specifying a code length serves two purposes:

1) It provides an additional means of checking the validity of bar code data. When you set the decoder for specific lengths, only bar code fields that contain the exact number of characters are decoded.

2) The decoder uses the code length information to optimize the performance of the data acquisition circuitry. Only scans containing a sufficient number of bars and spaces (based upon selected symbology(s) and code length(s)) are passed on to the microprocessor for decoding.

LENGTHS-INTERLEAVED 2-OF-5 (j) - You can specify up to 8 code lengths (maximum of 64 characters) for Interleaved 2-of-5 bar code labels. The value you enter must be an even number. The code length includes the

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Configuring Y our Decoder

check character but not the start and stop characters. If you do not want to specify a code length, enter a zero (any lengths to the right of the zero are ignored).

Note: If the decoder is going to read Interleaved 2-of-5 bar code labels, we recommend that you specify a code length. If you do not specify a code length, it is possible for a partial scan of symbols to be interpreted as a valid shorter message. If two character codes are being decoded you must set the length to 2.

LENGTHS-CODE 128 (k) - You can specify up to 8 code lengths (maximum of 64 characters) for Code 128 bar code labels. The code length does not include the start, stop, and check characters. If you do not want to specify a code length, enter a zero (any lengths to the right of the zero are ignored).

LENGTHS-CODABAR (l) - You can specify up to 8 code lengths (maximum of 64 characters) for Codabar bar code labels. The code length includes the start, stop, and check characters. If you do not want to specify a code length, enter a zero (any lengths to the right of the zero are ignored).

Scanner Control

LASER-ON MODE (m)- You can select one of two options:

1) Continuous- If you select the continuous mode, the scan head will scan continuously.

Note: Laser scanners have a turn on time of approximately 50 msec in addition to a short warm up time. The optimum performance of the laser scanner is achieved after the warm up period. You should refer to the user manual for the scanner you are using.

2) Triggered - If you select the triggered mode, the scan head will only scan when triggered by the package detector, host, or internal timer. Once triggered, the scan head will continue scanning until the option selected in the Decode Trigger mode field (see next section) indicates the end of the trigger.

4–28

DECODE TRIGGER MODE (n) - You must specify how the decoder starts and stops decoding. You have four options:

1) Package Detect - If you select package detect, the decoder will trigger on when a package detect signal is present and trigger off when one of the following occurs:

• Fields per package count is met.

• Package detect signal is off.

• No-read timer times out.

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When you set the decoder trigger mode to package detect and send data packets to the host, you must take into consideration the length of the package detect signal, the package rate, and the transmission time. The decoder is able to generate data at a rate that is much faster than the transmission rate. Therefore, at high package rates the decoded data can exceed the speed at which the data is transmitted. Refer to Figure 4.3.

Figure 4.3 Package Detect Timing with Communications Enabled

P = A + B = Time from one package to the next. A = Trigger Active period. Refer to Input Filter description for timing

considerations.

B = Time between packages. This must be a minimum of 5 msec without the

package detect filter enabled, and 15 msec with the package detect filter enabled.

For long message packets, allow additional time to prevent loss of data due to a buffer overflow. When the no-read timer is disabled, the time needed between packages can be calculated as follows.

B =

When the no-read timer is enabled, the time required between packages can be calculated as follows:

6 x (Number of Characters) Baud Rate (

6 x (Number of Characters) Baud Rate (where Baud rate is ≥ 9600)

where Baud rate is ≥ 9600)

+ (No-Read Timer ) - AB =

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2) Host - If you select host triggering, the decoder will trigger on when a host start scan command is received and trigger off when one of the following occurs:

• Fields per package count is met.

• Stop scan command is received from host.

• No-read timer times out.

Chapter 7 provides a description of how to send start and stop trigger commands from a host.

3) Internal Timer - If you select internal timer, the decoder will only decode scan head data based upon the duration of the No-Read timer. The No-read timer simulates the package detect input. When functioning as a trigger source, the No-Read timer will alternate the trigger from ON to OFF. The length of time the trigger is on and the trigger is off are equal and is determined by the value entered in the No-Read timer field. Refer to Figure 4.4.

Figure 4.4 Internal Timer Trigger

ON X = Y = No Read Timer Value in Milliseconds Minimum Value = 10 msec

Maximum Value = 9995 msec Count Increments in 5 msec intervals.

Note: When the decode trigger is not set to internal timer, the No-Read timer functions as a trigger timeout. Once triggered by the host or package detector, the decoder will decode bar code data until either the end of the trigger or the No-Read timer times down to zero.

OFF ON

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4) Continuous - If you select continuous decode triggering, the decoder will continuously try to decode data received from the scan head.

Note: The No-Read condition does not exist in the continuous scanning mode.

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CAPTURE COUNT (o) - The capture count field sets the number of identical and valid scans that must be decoded before the read is considered valid. This entry is a numeric value from 1 through 8. The default value is 2.

When a poor quality label is scanned, it is possible for the decoder to interpret the label in one of three ways:

• Valid Scan. The decoded information matches label.

• Undecodable Scan. The video data sent from the scanner to the decoder

does not correspond (for any or all characters) to a valid pattern within the symbology selected.

• Mis-Read. Or substitution error; the video data for a particular scan

matches a valid pattern within a selected symbology that is different from the intended pattern. This error is often caused by smudges, stray marks, voids, or print errors that result in wider or narrower bars being decoded.

The purpose of the capture count is to reduce the chance of a mis-read by forcing the decoder to read the label multiple times before issuing a valid read.

Certain bar code symbologies are more susceptible to mis-reads because they are not self checking (Code 39, Interleaved 2 of 5, and Codabar when check characters are not used). For these bar code symbologies, the capture count should be set to no less than two.

Setting the capture count too high may result in excessive “no-reads“, particularly when the number of scans crossing the label within a trigger period is low (5-10 scans). The capture count should be set to a value which results in minimum mis-reads and maximum valid reads. We recommend that the capture count should be set no greater than half of the number of scans crossing the label in a trigger period. The capture count should be set to at least two for symbologies that are not self checking.

FIELDS/SCAN (p) - The fields per scan field sets the number of bar code labels that are to be included in each scan. The bar code fields in each scan must be of the same symbology type. A scan refers to the movement of the laser beam from one side to the other. During the scan, the decoder looks for a valid bar code field to decode. On a single scan, the decoder can decode up to 4 successive bar code fields. You can select from five options: 1, 2, 3, 4, or Any. If you select ANY, the decoder will look for 1, 2, 3, or 4 fields. For optimum performance and security against missing labels, we recommend that you specify the number of fields per scan.

Note: If the decoder is operating in any of the triggered modes and you select “ANY” fields per scan, multiple bar code fields in each label should have unique first characters. If two bar code fields have the same first characters, the decoder will assume duplicate fields have been decoded and ignore the second field.

FIELDS/PACKAGE (q) - The fields per package field sets the number of bar code symbols that are on each package being scanned. You can enter a

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numeric value from 1 through 8. This parameter must be met for a “Read“ to occur (see Output section later in this chapter).

NO-READ TIMER (Milliseconds) (r) - This timer determines a no-read condition when the decoder is in a triggered mode. After receiving a trigger, the no-read timer will begin to time out. If a “Read“ (satisfying the fields/package requirements) does not occur before the timer times out, a No-Read condition will occur. The No-Read timer must be long enough to allow the entire package to be read, otherwise a no-read will occur. The no-read timer can also function as a trigger source when the decode trigger is set to internal timer (refer to the description of the Decode Trigger Mode field). You must enter either a numeric value from 10 through 9999 or a value of 0 which disables the timer.

Note: The timers (No-Read & Inter-Scan) have an accuracy of ± 5 milliseconds.

INTER-SCAN TIMER (Milliseconds) (s) - This field sets the allotted time between a valid read and the beginning of the next scan in which decoding can be attempted.

You should use the inter-scan timer in applications where you need to discriminate between multiple bar code fields appearing on the same label (on different scans) and you cannot ensure the uniqueness of the bar code fields. The first valid scan starts the inter-scan timer. The decoder cannot decode another scan until the inter-scan timer times out. You can use the inter-scan timer in both continuous or triggered scanning modes. You must enter either a numeric value from 10 through 9999 or a value of 0 which disables the timer. You should set the timer so that after a valid scan, the attempt to decode the next scan is started between the bar code fields (see next page).

After the decoder decodes the first scan, a second scan is not recognized until a scan is decoded that is different from the first. The third bar code scanned must be different from the second, etc.

Note: When using both the no-read and inter-scan timers, make sure that your no-read timer is set to a value greater than the value entered for the inter-scan timer so that all labels on the package are read before the No-Read timer times out.

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Note: Automotive Industry Action Group (AIAG) labels contain unique bar code fields. Therefore, we recommend that you disable the inter-scan timer when scanning AIAG labels.

Note: If continuous decode triggering is selected and the same bar code field is decoded continuously, the inter-scan timer will effectively determine the rate at which the decoded data is sent to the HOST port, AUX port, or used for match code operation.

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Note: The timers (No-Read & Inter-Scan) have an accuracy of ± 5 milliseconds.

To assist you in setting the inter-scan timer, we have provided the following guidelines. These guidelines will only allow you to approximate the setting of the timer. Since many factors, including label quality, determine when the first read occurs, you may have to try several different timer settings before finding a setting for your application.

Refer to Figure 4.5. The inter-scan timer setting can be approximated using the following equation:

d (inches) X 1000 (msec/sec)

Approximate Inter-Scan Timer

Line Speed (inches/sec )

Value (msec)

Figure 4.5 Setting Inter-Scan Timer

Scan Line

Direction of Travel

Field#

In Figure 4.5, the decoder will decode Field #1, start the inter-scan timer, stop decoding, and wait for the timer to time out. The decoder will then resume decoding. When the timer times out, Field #1 will be x distance behind the scan line. The distance x is measured from the trailing edge of Field #1 and will be a value between zero and d depending upon where the scan line was in Field #1 when the valid read occurred.

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Note: The layout of the label must be such that the distance d is less than or equal to D for the scanner to scan all of Field #2. In addition, the line speed must be constant.

MATCH COMPLETE (t) - This field sets the specific number of entries in the match code table that must be matched to a package before a Match Complete condition occurs. Match Complete is one of the six conditions that can turn on an output (refer to the match code table information which follows). You must enter a numeric value from 1 through 8.

Note: The Match Complete entry does not have to be the same as the Fields Per Package entry. However, if the Match Complete entry is greater than the Fields Per Package entry, a match complete condition will never occur.

Match Code Table

BAR CODE SYMBOLOGY (u) - When using the match code operation, you must specify the type of symbology used. You can select from one of the following symbologies: Code 39, Interleaved 2-of-5, Code 128, Codabar, UPC-A, UPC-E, EAN-8, EAN-13.

MATCH CODE ENABLE (v) - Each of the match codes may be individually enabled by selecting Y(Yes) in the enable field. Selecting N(No) will disable the match code operation.

MATCH CODE (w) - In these fields, you may enter the code that you want to match. You must enter the code as it will be transmitted to the host (e.g. do not include check digits if you have selected to suppress the transmission of the check digit in the decoder’s configuration). The decoder will compare the match code with any decoded bar code data. If the decoded bar code data matches the match code, a Match condition occurs. You can enter up to 32 ASCII characters in each of the eight fields.

Note: The ? character is a ”wild card” character that will result in a match with any other ASCII character. You can enter a non-printable control

character as shown in Table 4.B.

Outputs

OUTPUT CONTROL (x)- These fields specify the conditions that must be met to turn an output on. You can operate up to eight output modules based upon a variety of conditions. You can select one of eight options for each condition (Module position # 8 has nine options).

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1) None: Selecting none will disable the output module.

2) Match Entry: Selecting this option will turn on the module whenever a bar

code matches the match code entry to the left of this field.

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3) Match-Complete: Selecting the match complete option will turn on the output module when the number of matches made to any one or combination of the selected match codes is equal to the quantity specified in the MATCH COMPLETE field.

4) Read (Package): In the continuous scanning mode, an output will be turned on when the following conditions are met:

• Fields per scan parameter is met.

• Each field is valid.

• Scan capture count parameter is met.

In the triggered mode of operation, there is an additional requirement:

• Fields per package count must be met.

5) No-Read (Package): Selecting the no-read option will result in the output module being turned on whenever a no-read condition occurs. A No-Read condition occurs whenever a valid package is expected but not found. A No-Read condition will also occur whenever the No-Read timer times out before there is a valid package read. No-read conditions do not occur if the continuous trigger mode of operation is selected.

Note: A No-Read will also occur if there is a valid read and the buffer to the host is full at the end of a trigger. Under these circumstances, the No-Read condition indicates that the decoder cannot process the bar code without overwriting data in the buffer.

6) Read and No-Match: Selecting the read and no-match option will result in the output module being turned on whenever a symbol is read but does not match any code provided in the match code table.

7) No-Read or No-Match: Selecting the no-read or no-match option will result in the output being turned on whenever a no-read or a no-match condition (with any code provided in the match code table) occurs. If the data buffer overflows and data is lost, the No-Read or No-Match output will also be turned on.

8) Auto Load: The Auto Load feature provides the ability to automatically fill the Match Table entry with bar code fields read from a valid package. After selecting Auto Load, SAVE the configuration and perform a RESTART. When a valid package is decoded, the bar code fields (32 characters max.) are sequentially loaded into the Match Table for each entry that has Auto Load selected until:

• All entries (designated as Auto Load) are filled.

-or-

• The Fields /Package requirement has been satisfied. If the number of

fields to be filled exceeds the fields per package setting, only the number of fields equal to the fields per package setting will be filled. You can fill remaining fields by saving the new configuration and restarting.

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-or-

• An invalid operation has occurred (no-read, required symbology not

enabled, improper bar code length, etc.). If any field within the package cannot be decoded, all fields will be ignored and the decoder will wait for the next package.

For each match table entry that is filled, the decoder will:

• Automatically set the bar code symbology.

• Change the match code enable to YES.

• Enter match code string into the match table.

• Change output condition from Auto Load to Match-Entry In Table.

• Send the match code string to the AUX port if at the select language

screen. This provides the ability to monitor the auto loaded string at any display device connected at the AUX port.

Note:You must SAVE the configuration and RESTART the decoder after auto loading if you want the newly loaded match codes to be stored in EEPROM.

Enable auto load in one of two ways:

• Enable the auto load condition for one or more outputs and perform a

SAVE and a RESTART. You can RESTART the decoder by cycling the power, sending a RESTART command from the host, or selecting RESTART at the Select Operations menu of the programmer CRT.

• If you have Auto Load (INPUT) selected for module #8, an auto load

input signal can be sent to an input module in the #8 position. This signal activates the input module which enables the auto load. Refer to Input section below for more information.

Note: When Auto Load is enabled, only the bar code fields from the first valid package are entered into the match table. Auto Load is then disabled until the next RESTART or Auto Load (INPUT) signal is detected.

Note: When you auto load a “%” character, the decoder will automatically enter “%%” into the match table. The “%” character is used to enter non-printable control characters. Refer to page 4-14.

Inputs

Auto Load (INPUT): The Auto Load (INPUT) condition only applies to module position #8. This module position is unique and can accept either an input or an output module. Selecting Auto Load (INPUT) configures module position #8 to accept an input module. Otherwise, module position #8 functions the same as module positions 1 through 7.

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When you select the Auto Load (INPUT) condition for module #8, make sure that at least one of the output conditions for modules #1 through #7 is configured for Auto Load and SAVED to EEPROM. Auto Load (INPUT) changes outputs #1 through #7 (if configured for Auto Load) by clearing out

Configuration as Stored in EEPROM

001688421378

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the current match codes and loading new match codes. Auto Load (INPUT) does not cause match code data to be loaded into match table entry #8.

Auto Load (INPUT) is useful in product verification applications where new match codes need to be loaded into the decoder on a regular basis. When a new product label needs to be entered into the match table, an Auto Load pushbutton is pressed by an operator. Then, a sample of the product is run by the scanner. The new match code is automatically entered. If a display is connected to the AUX port, you can then read and verify the match code value.

Figure 4.6 Auto Load Feature

-------------MATCH CODE TABLE---------- -------- OUTPUTS [ENABLED]------------

1) I 2-of-5 Y Auto Load 0100

2) I 2-of-5 Y Auto Load 0100

3) I 2-of-5 Y Auto Load 0100

4) CODE 39 N None 0000

5) CODE 39 N None 0000

6) CODE 39 N None 0000

7) CODE 39 N None 0000

8) CODE 39 N Auto Load (INPUT) 0000 Before Auto Load

411528258538

611679808644

First Valid Package Read

Note: Interleaved 2-of-5 must be an enabled symbology. Fields/Package is assumed to be 3 for this example.

-------------MATCH CODE TABLE---------- ------- OUTPUTS [ENABLED]------------

1) I 2-of-5 Y 001688421378 Match Entry 0100

2) I 2-of-5 Y 411528258538 Match Entry 0100

3) I 2-of-5 Y 611679808644 Match Entry 0100

4) CODE 39 N None 0000

5) CODE 39 N None 0000

6) CODE 39 N None 0000

7) CODE 39 N None 0000

8) CODE 39 N Auto Load (INPUT) 0000 Input Module #8 Activated

-------------MATCH CODE TABLE---------- -------- OUTPUTS [ENABLED]------------

1) I 2-of-5 Y Auto Load 0100

2) I 2-of-5 Y Auto Load 0100

3) I 2-of-5 Y Auto Load 0100

4) CODE 39 N None 0000

5) CODE 39 N None 0000

6) CODE 39 N None 0000

7) CODE 39 N None 0000

8) CODE 39 N Auto Load (INPUT) 0000

Ready for next Auto Load

After Auto Load

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OUTPUT DURATION (Milliseconds) (y) - These fields specify the length of time an output is turned on. You may enter a value from 10 through 9999. If you enter a 0, the output is disabled. The accuracy of the output duration is ± 5 msec.

OUTPUT CONDITION (z) - This is an indication of the operating condition of the output modules. You disable or enable the outputs by responding to the screen that is displayed prior to entering the configuration screens. Refer to page 4-8 for more information.

Programming Example

To assist you in becoming familiar with the menus and setup screens, wehave provided the following programming example:

1) Make the necessary connections, configure your programming terminal, and turn the decoder on. The following will be displayed:

SELECT LANGUAGE CHOIX DU LANGAGE WAEHLE SPRACHE

1) English 1) Anglais 1) Englisch

2) French 2) Francais 2) Franzoesisch

3) German 3) Allemand 3) Deutsch

4) Italian 4) Italien 4) Italienisch

5) Spanish 5) Espagnol 5) Spanisch

Press 1, 2, 3, 4, 5, or ESC Appuyer 1, 2, 3, 4, 5 ou ESC Druecke 1, 2, 3, 4, 5, oder ESC

SELEZIONARE LINGUA SELECCIONAR LENGUA

1) Inglese 1) Ingles

2) Francese 2) Frances

3) Tedesco 3) Aleman

4) Italiano 4) Italiano

5) Spangnolo 5) Castellano

Premere 1, 2, 3, 4, 5 o ESC Pulsar 1, 2, 3, 4, 5, o ESC

2) Press the [1] key to select English. The following screen will be displayed:

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SELECT CRT TYPE

1) Allen-Bradley 1770 Industrial Terminal

2) Allen-Bradley T45 Portable Terminal

3) Lear Siegler ADM 3E

4) Televideo 955

5) Digital VT100

Press 1, 2, 3, 4, 5 or ESC

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3) Press the key which corresponds to your programming terminal. After specifying the CRT type, the following will be displayed:

SELECT OPERATION

1) Display Bar Code Labels

2) Display Status and Counters

3) Display/Change Configuration

4) Reset Status and Counters

5) Restart

6) Select Language

Press 1, 2, 3, 4, 5, 6, or ESC

4) Press the [3] key to select the Display/Change Configuration operation. The following will be displayed:

CAUTION

Configuration changes may cause the discrete outputs to switch.

If outputs are to remain ENABLED, press ESC.

Otherwise press any other key to continue. Outputs will be DISABLED until the device is restarted.

Note: We recommend that the outputs be DISABLED during configuration to prevent unintentional switching. The outputs can be ENABLED by performing a Restart after configuration (remember to SAVE changes to EEPROM before Restarting.

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The decoder will display:

------- MESSAGE FORMAT ------- ------- HOST COMM ------SEND BAR CODE DATA: Yes BAUD RATE: 9600

SEND PACKAGE COUNT: No BITS/CHAR: 8 Data, 1 Stop

SEND BAR CODE TYPE: No PARITY: None

SEND SOURCE IDENTIFIER: No

SEND HEADER MESSAGE: No ACK CHAR: None

SEND NO-READ MESSAGE: No NAK CHAR: None

START SCAN CHAR: None

EXPAND UPC-E: Yes STOP SCAN CHAR: None

SOURCE IDENTIFIER: LARGE BUFFER: No

LABEL DELIMITER: None RESPONSE MODE: End of Trigger

START CHAR: None HOST PROTOCOL: RS232

END MESSAGE: CRLF DEVICE ADDRESS: 01

TRANSMISSION CHECK: None

HEADER MESSAGE:

NO-READ MESSAGE:

CODE 39 CHECK CHAR: No SEND: No ---PACKAGE DETECT INPUT---

I 2-OF-5 CHECK CHAR: No SEND: No FILTER: No

CODABAR CHECK CHAR: No SEND: No SENSE: LO = Package

Commands: ESC Change: SPACE Cursor Control: ARROWS

Note: Different values or selections may appear depending upon the previous programming of your decoder

5) In this example we want to enter a SEND NO-READ message and set the decoder response mode to After Valid Package. To do this, press the down arrow or [RETURN] key five times until the SEND NO-READ MESSAGE field is highlighted in reverse video:

------- MESSAGE FORMAT ------- ------- HOST COMM -------

Commands: ESC Change: SPACE Cursor Control: ARROWS

SEND BAR CODE DATA: Yes BAUD RATE: 9600

SEND PACKAGE COUNT: No BITS/CHAR: 8 Data, 1 Stop

SEND BAR CODE TYPE: No PARITY: None

SEND SOURCE IDENTIFIER: No

SEND HEADER MESSAGE: No ACK CHAR: None

SEND NO-READ MESSAGE: No NAK CHAR: None

START SCAN CHAR: None

EXPAND UPC-E: Yes STOP SCAN CHAR: None

SOURCE IDENTIFIER: LARGE BUFFER: No

LABEL DELIMITER: None RESPONSE MODE: End of Trigger

START CHAR: None HOST PROTOCOL: RS232

END MESSAGE: CRLF DEVICE ADDRESS: 01

TRANSMISSION CHECK: None

HEADER MESSAGE:

NO-READ MESSAGE:

CODE 39 CHECK CHAR: No SEND: No ---PACKAGE DETECT INPUT---

I 2-OF-5 CHECK CHAR: No SEND: No FILTER: No

CODABAR CHECK CHAR: No SEND: No SENSE: LO = Package

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6) If the YES option is not displayed, press the [SPACE] bar to select the YES option:

------- MESSAGE FORMAT ------- ------- HOST COMM ------SEND BAR CODE DATA: Yes BAUD RATE: 9600

SEND PACKAGE COUNT: No BITS/CHAR: 8 Data, 1 Stop

SEND BAR CODE TYPE: No PARITY: None

SEND SOURCE IDENTIFIER: No

SEND HEADER MESSAGE: No ACK CHAR: None

SEND NO-READ MESSAGE: Yes NAK CHAR: None

START SCAN CHAR: None

EXPAND UPC-E: Yes STOP SCAN CHAR: None

SOURCE IDENTIFIER: LARGE BUFFER: No

LABEL DELIMITER: None RESPONSE MODE: End of Trigger

START CHAR: None HOST PROTOCOL: RS232

END MESSAGE: CRLF DEVICE ADDRESS: 01

TRANSMISSION CHECK: None

HEADER MESSAGE:

NO-READ MESSAGE:

CODE 39 CHECK CHAR: No SEND: No ---PACKAGE DETECT INPUT---

I 2-OF-5 CHECK CHAR: No SEND: No FILTER: No

CODABAR CHECK CHAR: No SEND: No SENSE: LO = Package

SELECT -- Cancel: ESC Change: SPACE Enter: RETURN

7) Press the [RETURN] key to enter the value and press [RETURN] key again until the LABEL DELIMITER field is highlighted. Press the right arrow key to highlight the RESPONSE MODE field (use [CTRL] and [R] keys on Allen-Bradley Industrial Terminals):

------- MESSAGE FORMAT ------- ------- HOST COMM ------SEND BAR CODE DATA: Yes BAUD RATE: 9600

SEND PACKAGE COUNT: No BITS/CHAR: 8 Data, 1 Stop

SEND BAR CODE TYPE: No PARITY: None

SEND SOURCE IDENTIFIER: No

SEND HEADER MESSAGE: No ACK CHAR: None

SEND NO-READ MESSAGE: Yes NAK CHAR: None

START SCAN CHAR: None

EXPAND UPC-E: Yes STOP SCAN CHAR: None

SOURCE IDENTIFIER: LARGE BUFFER: No

LABEL DELIMITER: None RESPONSE MODE: End of Trigger

START CHAR: None HOST PROTOCOL: RS232

END MESSAGE: CRLF DEVICE ADDRESS: 01

TRANSMISSION CHECK: None

HEADER MESSAGE:

NO-READ MESSAGE:

CODE 39 CHECK CHAR: No SEND: No ---PACKAGE DETECT INPUT---

I 2-OF-5 CHECK CHAR: No SEND: No FILTER: No

CODABAR CHECK CHAR: No SEND: No SENSE: LO = Package

Commands: ESC Change: SPACE Cursor Control: ARROWS

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8) Press the [SPACE] key to display the the Valid Package response mode:

------- MESSAGE FORMAT ------- ------- HOST COMM ------SEND BAR CODE DATA: Yes BAUD RATE: 9600

SEND PACKAGE COUNT: No BITS/CHAR: 8 Data, 1 Stop

SEND BAR CODE TYPE: No PARITY: None

SEND SOURCE IDENTIFIER: No

SEND HEADER MESSAGE: No ACK CHAR: None

SEND NO-READ MESSAGE: Yes NAK CHAR: None

START SCAN CHAR: None

EXPAND UPC-E: Yes STOP SCAN CHAR: None

SOURCE IDENTIFIER: LARGE BUFFER: No

LABEL DELIMITER: None RESPONSE MODE: Valid Package

START CHAR: None HOST PROTOCOL: RS232

END MESSAGE: CRLF DEVICE ADDRESS: 01

TRANSMISSION CHECK: None

HEADER MESSAGE:

NO-READ MESSAGE:

CODE 39 CHECK CHAR: No SEND: No ---PACKAGE DETECT INPUT---

I 2-OF-5 CHECK CHAR: No SEND: No FILTER: No

CODABAR CHECK CHAR: No SEND: No SENSE: LO = Package

SELECT -- Cancel: ESC Change: SPACE Enter: RETURN

9) Press the [RETURN] key to enter the value and use [RETURN] and arrow keys to position the cursor at the NO-READ MESSAGE field. Press the [SPACE] bar. Type a NO-READ message into the empty field:

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------- MESSAGE FORMAT ------- ------- HOST COMM ------SEND BAR CODE DATA: Yes BAUD RATE: 9600

SEND PACKAGE COUNT: No BITS/CHAR: 8 Data, 1 Stop

SEND BAR CODE TYPE: No PARITY: None

SEND SOURCE IDENTIFIER: No

SEND HEADER MESSAGE: No ACK CHAR: None

SEND NO-READ MESSAGE: Yes NAK CHAR: None

START SCAN CHAR: None

EXPAND UPC-E: Yes STOP SCAN CHAR: None

SOURCE IDENTIFIER: LARGE BUFFER: No

LABEL DELIMITER: None RESPONSE MODE: Valid Package

START CHAR: None HOST PROTOCOL: RS232

END MESSAGE: CRLF DEVICE ADDRESS: 01

TRANSMISSION CHECK: None

HEADER MESSAGE:

NO-READ MESSAGE: NO-READ

CODE 39 CHECK CHAR: No SEND: No ---PACKAGE DETECT INPUT---

I 2-OF-5 CHECK CHAR: No SEND: No FILTER: No

CODABAR CHECK CHAR: No SEND: No SENSE: LO = Package

EDIT -- Cancel: ESC Enter: RETURN Erase Char: Backspace

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10) Press the [RETURN] key to enter the No-Read message and then press the [ESC] key to select the command bar. Notice that the five commands are shown on the bottom of the display:

------- MESSAGE FORMAT ------- ------- HOST COMM ------SEND BAR CODE DATA: Yes BAUD RATE: 9600

SEND PACKAGE COUNT: No BITS/CHAR: 8 Data, 1 Stop

SEND BAR CODE TYPE: No PARITY: None

SEND SOURCE IDENTIFIER: No

SEND HEADER MESSAGE: No ACK CHAR: None

SEND NO-READ MESSAGE: Yes NAK CHAR: None

START SCAN CHAR: None

EXPAND UPC-E: Yes STOP SCAN CHAR: None

SOURCE IDENTIFIER: LARGE BUFFER: No

LABEL DELIMITER: None RESPONSE MODE: Valid Package

START CHAR: None HOST PROTOCOL: RS232

END MESSAGE: CRLF DEVICE ADDRESS: 01

TRANSMISSION CHECK: None

HEADER MESSAGE:

NO-READ MESSAGE: NO-READ

CODE 39 CHECK CHAR: No SEND: No ---PACKAGE DETECT INPUT---

I 2-OF-5 CHECK CHAR: No SEND: No FILTER: No

CODABAR CHECK CHAR: No SEND: No SENSE: LO = Package

COMMAND -- Exit: ESC Select: RETURN Next Command: SPACE

NEXT PAGE THIS PAGE RECALL SAVE DEFAULT

11) Notice that the NEXT PAGE command is highlighted. Press the [RETURN] key to enter the command. The next setup screen will be displayed:

-- SYMBOLOGY -- -------- LENGTHS -------- -------- SCANNER CONTROL --------

CODE 39: Yes 00 00 00 00 00 00 00 00 LASER-ON MODE: Continuous

I 2-OF-5: No 00 00 00 00 00 00 00 00 DECODE TRIGGER: Package Detect

CODE 128: No 00 00 00 00 00 00 00 00 CAPTURE COUNT: 2 (scans)

CODABAR: No 00 00 00 00 00 00 00 00 FIELDS/SCAN: 1

UPC-A: No FIELDS/PACKAGE: 1 UPC-E: No NO-READ TIMER: 0000 (msec)

EAN-8: No INTER-SCAN TIMER: 0000 (msec)

EAN-13: No MATCH COMPLETE: 1

------------MATCH CODE TABLE-------------- --------- OUTPUTS [DISABLED]---------

1) CODE 39 N None 0000

2) CODE 39 N None 0000

3) CODE 39 N None 0000

4) CODE 39 N None 0000

5) CODE 39 N None 0000

6) CODE 39 N None 0000

7) CODE 39 N None 0000

8) CODE 39 N None 0000

Commands: ESC Change: SPACE Cursor Control: ARROWS

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Chapter 4

Configuring Y our Decoder

12) In this example we want to turn output #1 on for 10 milliseconds whenever a I 2-OF-5 label containing the data 1234 is read. Use the arrow keys to highlight the code type field for entry #1. Press the [SPACE] key until the I 2-OF-5 option appears. Press the [RETURN] key to enter the selection.

-- SYMBOLOGY -- -------- LENGTHS -------- -------- SCANNER CONTROL -------CODE 39: Yes 00 00 00 00 00 00 00 00 LASER-ON MODE: Continuous

I 2-OF-5: No 00 00 00 00 00 00 00 00 DECODE TRIGGER: Package Detect

CODE 128: No 00 00 00 00 00 00 00 00 CAPTURE COUNT: 2 (scans)

CODABAR: No 00 00 00 00 00 00 00 00 FIELDS/SCAN: 1

UPC-A: No FIELDS/PACKAGE: 1 UPC-E: No NO-READ TIMER: 0000 (msec)

EAN-8: No INTER-SCAN TIMER: 0000 (msec)

EAN-13: No MATCH COMPLETE: 1

------------MATCH CODE TABLE-------------- --------- OUTPUTS [DISABLED]---------

1) I 2-OF-5 N None 0000

2) CODE 39 N None 0000

3) CODE 39 N None 0000

4) CODE 39 N None 0000

5) CODE 39 N None 0000

6) CODE 39 N None 0000

7) CODE 39 N None 0000

8) CODE 39 N None 0000

Commands: ESC Change: SPACE Cursor Control: ARROWS

13) Use the arrow keys to highlight the match table enable field for output #1:

-- SYMBOLOGY -- -------- LENGTHS -------- -------- SCANNER CONTROL -------CODE 39: Yes 00 00 00 00 00 00 00 00 LASER-ON MODE: Continuous

I 2-OF-5: No 00 00 00 00 00 00 00 00 DECODE TRIGGER: Package Detect

CODE 128: No 00 00 00 00 00 00 00 00 CAPTURE COUNT: 2 (scans)

CODABAR: No 00 00 00 00 00 00 00 00 FIELDS/SCAN: 1

UPC-A: No FIELDS/PACKAGE: 1 UPC-E: No NO-READ TIMER: 0000 (msec)

EAN-8: No INTER-SCAN TIMER: 0000 (msec)

EAN-13: No MATCH COMPLETE: 1

------------MATCH CODE TABLE-------------- --------- OUTPUTS [DISABLED]---------

1) I 2-OF-5 N None 0000

2) CODE 39 N None 0000

3) CODE 39 N None 0000

4) CODE 39 N None 0000

5) CODE 39 N None 0000

6) CODE 39 N None 0000

7) CODE 39 N None 0000

8) CODE 39 N None 0000

4–44

Commands: ESC Change: SPACE Cursor Control: ARROWS

Chapter 4

Configuring Y our Decoder

14) Press the [SPACE] bar to select the YES option. Press [RETURN]. Use the arrow keys to move the cursor to the text field of the match code table. Press the [SPACE] bar to clear the field (field now in reverse video) and type in the example 1234:

-- SYMBOLOGY -- -------- LENGTHS -------- -------- SCANNER CONTROL -------CODE 39: Yes 00 00 00 00 00 00 00 00 LASER-ON MODE: Continuous

I 2-OF-5: No 00 00 00 00 00 00 00 00 DECODE TRIGGER: Package Detect

CODE 128: No 00 00 00 00 00 00 00 00 CAPTURE COUNT: 2 (scans)

CODABAR: No 00 00 00 00 00 00 00 00 FIELDS/SCAN: 1

UPC-A: No FIELDS/PACKAGE: 1 UPC-E: No NO-READ TIMER: 0000 (msec)

EAN-8: No INTER-SCAN TIMER: 0000 (msec)

EAN-13: No MATCH COMPLETE: 1

------------MATCH CODE TABLE-------------- --------- OUTPUTS [DISABLED]---------

1) I 2-OF-5 Y 1234 None 0000

2) CODE 39 N None 0000

3) CODE 39 N None 0000

4) CODE 39 N None 0000

5) CODE 39 N None 0000

6) CODE 39 N None 0000

7) CODE 39 N None 0000

8) CODE 39 N None 0000

Commands: ESC Change: SPACE Cursor Control: ARROWS

15) Press the [RETURN] key to enter the match table entry. Use the arrow keys to highlight the output control field:

-- SYMBOLOGY -- -------- LENGTHS -------- -------- SCANNER CONTROL -------CODE 39: Yes 00 00 00 00 00 00 00 00 LASER-ON MODE: Continuous

I 2-OF-5: No 00 00 00 00 00 00 00 00 DECODE TRIGGER: Package Detect

CODE 128: No 00 00 00 00 00 00 00 00 CAPTURE COUNT: 2 (scans)

CODABAR: No 00 00 00 00 00 00 00 00 FIELDS/SCAN: 1

UPC-A: No FIELDS/PACKAGE: 1 UPC-E: No NO-READ TIMER: 0000 (msec)

EAN-8: No INTER-SCAN TIMER: 0000 (msec)

EAN-13: No MATCH COMPLETE: 1

------------MATCH CODE TABLE-------------- --------- OUTPUTS [DISABLED]---------

1) I 2-OF-5 Y 1234 None 0000

2) CODE 39 N None 0000

3) CODE 39 N None 0000

4) CODE 39 N None 0000

5) CODE 39 N None 0000

6) CODE 39 N None 0000

7) CODE 39 N None 0000

8) CODE 39 N None 0000

Commands: ESC Change: SPACE Cursor Control: ARROWS

4–45

Chapter 4

Configuring Y our Decoder

16) Press the [SPACE] bar until the Match Entry option is displayed. Press [RETURN]. Use the right arrow key to select the output time field, press the [SPACE] key, enter a value of 10 (10 milliseconds), and then press the [RETURN] key:

-- SYMBOLOGY -- -------- LENGTHS -------- -------- SCANNER CONTROL -------CODE 39: Yes 00 00 00 00 00 00 00 00 LASER-ON MODE: Continuous

I 2-OF-5: No 00 00 00 00 00 00 00 00 DECODE TRIGGER: Package Detect

CODE 128: No 00 00 00 00 00 00 00 00 CAPTURE COUNT: 2 (scans)

CODABAR: No 00 00 00 00 00 00 00 00 FIELDS/SCAN: 1

UPC-A: No FIELDS/PACKAGE: 1 UPC-E: No NO-READ TIMER: 0000 (msec)

EAN-8: No INTER-SCAN TIMER: 0000 (msec)

EAN-13: No MATCH COMPLETE: 1

------------MATCH CODE TABLE-------------- --------- OUTPUTS [DISABLED]---------

1) I 2-OF-5 Y 1234 Match Entry 0010

2) CODE 39 N None 0000

3) CODE 39 N None 0000

4) CODE 39 N None 0000

5) CODE 39 N None 0000

6) CODE 39 N None 0000

7) CODE 39 N None 0000

8) CODE 39 N None 0000

Commands: ESC Change: SPACE Cursor Control: ARROWS

17) Press the [ESC] key to select the command bar, press the [SPACE] key until the SAVE command is highlighted:

-- SYMBOLOGY -- -------- LENGTHS -------- -------- SCANNER CONTROL -------CODE 39: Yes 00 00 00 00 00 00 00 00 LASER-ON MODE: Continuous

I 2-OF-5: No 00 00 00 00 00 00 00 00 DECODE TRIGGER: Package Detect

CODE 128: No 00 00 00 00 00 00 00 00 CAPTURE COUNT: 2 (scans)

CODABAR: No 00 00 00 00 00 00 00 00 FIELDS/SCAN: 1

UPC-A: No FIELDS/PACKAGE: 1 UPC-E: No NO-READ TIMER: 0000 (msec)

EAN-8: No INTER-SCAN TIMER: 0000 (msec)

EAN-13: No MATCH COMPLETE: 1

------------MATCH CODE TABLE-------------- --------- OUTPUTS [DISABLED]---------

1) I 2-OF-5 Y 1234 Match Entry 0010

2) CODE 39 N None 0000

3) CODE 39 N None 0000

4) CODE 39 N None 0000

5) CODE 39 N None 0000

6) CODE 39 N None 0000

7) CODE 39 N None 0000

8) CODE 39 N None 0000

4–46

Commands: ESC Chan: SPACE Cursor Control: ARROWS

NEXT PAGE THIS PAGE RECALL SAVE DEFAULT

Chapter 4

Configuring Y our Decoder

18) Press the [RETURN] key. Press the [Y] key at the confirmation prompt. The decoder will display a message to wait while the configuration data is transferred to the decoder’s memory (EEPROM).

19) Press the [ESC] key to return to the Select Operations menu. Since we disabled the outputs prior to configuration, you must select the restart operation to enable the outputs.

SELECT OPERATION

1) Display Bar Code Labels

2) Display Status and Counters

3) Display/Change Configuration

4) Reset Status and Counters

5) Restart

6) Select Language

Press 1, 2, 3, 4, 5, 6, or ESC

4–47

Chapter

A–B

Installing the Decoder

Chapter Objectives

Equipment You Eill Need

Equipment Catalog No. Required or Optional Scan Head Decoder 2755-DM9, -DM9E Required. Host Port Communications Cable

Auxiliary Port Communications Cable

Scan Head Cable

Package Detector Assembly

Output Modules

Input Modules

Mounting Hardware User Provided. Refer to mounting instructions (in this chapter). RS-485 Connector 2760-A485

We will present rules and recommendations for laying out, installing, and connecting the decoder. Carefully read this chapter before installing the decoder.

You will need the following equipment, listed in Table 5.A, to install a complete system.

2755-L7, -L9,

-L4, or -L5①

User Provided, Refer

to Chapter 6

User Provided, Refer

to Appendix A

2755-L7, -L9 Scan Heads:

2755-CL10

(10-feet, 3.05 meter)

2755-CL25

(25-feet, 7.62 meter)

2755-L4, -L5 Scan Heads:

2755-CK10

(10-feet, 3.05 meter)

2755-CK25

(25-feet, 7.62 meter)

2755-NP3 2755-NP5 2755-NP1 2755-NP4

1781-OB5S 1781-OA5S

1781-OM5S

1781-IB5S 1781-IA5S

1781-IM5S

Required.

Required if decoder is connected to a host device or I/O rack module.

Required if programming terminal is used.

Required. Connects scan head to decoder.

Optional, for 2755-L7, -L9 Scan Heads Optional, for 2755-L7, -L9 Scan Heads Optional, for 2755-L4, -L5 Scan Heads Optional, for 2755-L4, -L5 Scan Heads

Optional. Two 1781-0B5S modules are provided with decoder. Refer to Chapter 2 for descriptions.

Optional. For module position #8 only. Refer to Chapters 2 and 4 for descriptions and implementation.

Optional. Use for multidropping decoders in an Allen-Bradley DH485 network.

① Not a complete catalog number, these scan heads are available in a variety of configurations.

5–1

Chapter 5

Installing the Decoder

lectrical Precautions

WARNING: Do not remove the housing of the decoder. No user maintenance of the decoder is required. An access panel is

Install this equipment using publication NFPA 70E, Electrical Safety Requirements for Employee Workplaces. We have set up a few specific

guidelines for you to follow in addition to the general guidelines of NFPA 70E.

Before connecting the decoder to the incoming power, verify that the source power is 85 to 264 volts AC, 47 to 63 Hz.

Careful wire routing helps to cut down on electrical noise. To reduce electrical noise, the decoder should be connected to its own branch circuit. The input power must be externally protected by a fuse or circuit breaker rated at no more than 15 amps. Route incoming power to the Decoder by a separate path from the communication cables. Do not run signal wiring and power wiring in the same conduit! Where paths must cross, their intersection should be perpendicular.

With solid-state systems, grounding helps to limit the effects of noise due to electromagnetic interference (EMI). To avoid problems caused by EMI, shielded cables should be used.

provided for installation and wiring of output modules.

How to Handle Excessive Noise

Grounding Recommendations

5–2

The recommendations given above will provide favorable operating conditions for most installations.

When the decoder is operating in a noise-polluted industrial environment, special consideration should be given to possible electrical interference. The effect of electrical interference has been minimized by the basic design of the hardware. Properly grounding the equipment, correctly routing wires and the use of shielded cables will also help minimize interference.

Grounding is an important safety measure in electricalinstallations. With solid-state systems, grounding also helps limit the effects of noise due to electromagnetic interference (EMI).

An authoritative source on grounding requirements is the National Electrical Code published by the National Fire Protection Association of Boston, Massachusetts. Article 250 of the Code discusses the types and sizes of wire conductors and safe methods of grounding electrical equipment and components.

Chapter 5

Installing the Decoder

Determining the Space Requirements

The decoder and scan head are separate units that can be mounted on separate surfaces. A 10 or 25-foot (3.05 or 7.62 meter) cable is used to connect the two units. Figure 5.2 shows the outline dimensions of the decoder.

Figure 5.2 Mounting Dimensions of the Decoder

Installing the Decoder

Before installing the decoder, review the following information:

• The decoder can be either wall or floor mounted.

• Allow a minimum clearance of 8 inches (0.2 meter) at the rear of the

decoder so you can attach the cables to the various ports.

• If output modules are being used, allow a minimum clearance of 8 inches

at the top of the decoder so you can remove or rewire output modules.

5–3

Chapter 5

Installing the Decoder

You will need four 1/4 - 20 hexagon-head capscrews with flat and split lockwashers and nuts. Select a capscrew length that equals the thickness of the mounting surface, plus the thickness of the washers, plus at least 1/4-inch (12.7 mm) to accommodate the nut and mounting brackets of the decoder. Figure 5.3 shows the fasteners used for a typical installation.

Figure 5.3 Fasteners Used to Mount Decoder

5–4

Chapter 5

Installing the Decoder

How to Connect Your Equipment

Outputs 1-8

(Optional)

AC Power

Step 7

Step 8

Connect your equipment using the appropriate cables. Refer to Figure 5.4 as you follow the step-by-step procedures provided.

Figure 5.4 Connecting Equipment to the Decoder’s Ports

DECODER

HOST

Step 6

Step 4

Programming

Terminal

SCAN HEADAUXILIARY

Step 3

Package

Detect

(Optional)

Step 1

Scan Head

Step 2

Host

Step 5

Step 1 - Mount the scan head. Refer to the applicable user’s manual for the scan head.

Note: Make sure the decoder is securely mounted. The power switch should be in the off position and the power cable should not be connected.

Step 2 - If a package detector will be used, connect it to the scan head. Step 3 - Connect the scan head to the port labeled SCAN HEAD or

SCANNER on the back of the decoder using one of the following: Catalog No. 2755-L7, -L9 Scan Heads:

10 foot (3.05 meter) cable (Catalog No 2755-CL10) 25 foot (7.62 meter) cable (Catalog No. 2755-CL25)

Catalog No. 2755-L4, -L5 Scan Heads:

10 foot (3.05 meter) cable (Catalog No 2755-CK10) 25 foot (7.62 meter) cable (Catalog No. 2755-CK25)

5–5

Chapter 5

Installing the Decoder

Step 4 - Connect the terminal that will be used for programming to the port labeled AUX or AUXILIARY on the decoder. Since the programming may have been done earlier, this step is optional.

Note: It is possible to program the decoder from a host device. However, it is preferable to use a programming terminal as described in Chapter 4.

Step 5 - The initial programming should be done at this time, if it was not done earlier (at a simulation).

Step 6 - If a host device will be used, connect it to the port labeled HOST on the back of the decoder. Refer to Chapter 6 and Figures 2.3 and 3.3.

Step 7 - If input or output devices are used, perform the following:

• Verify that fuses are installed. Refer to section titled Module Fuse

Replacement (Chapter 9).

• Install additional modules, if needed. Refer to section titled Installing and

Wiring Modules.

• Connect wiring to the module connectors (located under access cover).

Refer to Installing and Wiring Modules.

Step 8 - Make sure the power switch on the decoder is in an off position, plug cord into the decoder, and connect the power cord to a power source.

Installing and Wiring Modules

5–6

Note: The 2755-DM9E is supplied with an unterminated cable. Attach a suitable connector using the diagram below.

Brown

Green/Yellow

Blue

Remove and install modules as follows:

1) Disconnect the power from the output modules and the decoder.

2) Remove the two hex head screws (5/64 inch) which secure the module access cover and remove cover.

3) There are eight positions for the modules. Locations #1 through #8 accept any combination of output modules. Location #8 may also be configured to accept an input module for the Auto Load function. Refer to Figure 5.4. The first two modules are installed at the factory.

Line (L1)

Earth Ground Neutral (L2)

Chapter 5

Installing the Decoder

4) After loosening the hold-down screws, modules can be pulled or plugged into the circuit board. Be careful not to damage the board. Make sure hold-down screws are tightened on installed modules.

Connect wiring to the modules as follows:

1) Eight terminal block type connectors are provided. Refer to Figure 5.5. These connectors will accept up to 14 gauge wiring.

Figure 5.5 Modules and Connectors

M O D U

L E

HOLD DOWN SCREWS

DC OUTPUT MODULES

PROVIDED IN FIRST TWO POSITIONS

M O D U

L E

F1 F2 F3 F4 F5 F6 F7 F8

M O D U L E

M O

D U L E

SPARE 1

SPARE 2

M O D U

L E

M O D U

L E

M O

D U

2) When wiring, refer to Figure 5.6 for the terminal connections. Make sure that you note the polarity when using DC modules.

3) Strip 1/4-inch (6 mm) of the insulation from the wire. Open the connector by turning the locking screw counterclockwise until the wire can be inserted into the connector.

LOCATION #8 ACCEPTS EITHER AN INPUT OR OUTPUT MODULE

O D U

MODULE CONNECTORS (8)

FUSES (8)

4) Tighten the locking screw on the connector to secure the wire.

5) Route wires from the module connectors through either the round knockout into conduit or the slot provided on the back of the chassis.

5–7

Chapter 5

Installing the Decoder

WARNING: If you are using output modules with voltages exceeding 30 volts RMS or 42.4 volts peak / DC, the wiring to all

modules MUST be routed through the round knockouts into conduit. The slot on the back of the chassis should only be used if all modules are used with voltages below 30 volts RMS or 42.4 volts peak / DC.

6) Install module access cover.

Figure 5.6 Module Connections

MODULES

CONNECTOR BLOCKS

NOTE POLARITY

2 3456

Module #1 _ +

Module #2

Module #3 _ +

Module #4 _ +

Module #7

Module #6 _ +

Module #5 _ +

Module #8 _ +

5–8

Chapter

Chapter Objectives

Host Port

A–B

Communicating With a Host

This chapter provides a basic description of the decoder’s ability to communicate with a host device. In addition, this chapter provides a description of the:

• Host communications port.

• Communications cable required to connect your host device to the

decoder.

• Format of the bar code data sent to a host.

• Available communications standards and how they are used.

The HOST communications port on the back of the decoder provides for communications with a host using the following standards:

• RS-232

• RS-422

• RS-485

All three communications interfaces are provided in the same 25 pin D connector. Figure 6.1 shows the pin numbers for the HOST port.

Note: We have provided connection diagrams for each interface in the appropriate sections of this chapter.

The type of cable that you use to connect the decoder to a host will vary depending upon the communication standard being used and the type of connector on the host’s serial communications port. You should use the connection diagrams provided in this chapter for the communications standard you are using. Using these diagrams, you can determine your requirements and create or purchase a host communications cable.

Note: Refer to Appendix E for a protocol selection table which lists all of the host protocol options.

6–1

Chapter 6

Communicationg With a Host

Figure 6.1 HOST Port Pin Numbers

CHASSIS GROUND

TD (TRANSMIT DATA) RS-232

RD (RECEIVE DATA) RS-232

RTS (REQUEST TO SEND) RS-232

CTS (CLEAR TO SEND) RS-232

SIGNAL GROUND COMMON (RS-485)

SHIELD (RS-485)

Connector:

User defined.

Unique to each host device

Cable:

Use shielded cable that is

appropriate for the communications standard

you are using.

* *

166

HOST Port on Decoder,

Data Terminal Equipment (DTE)

Note: Connect shield to shell of HOST

connector.

LINE TERMINATION (RS-485)

B (RS-422) + (SD) SEND DATA (B RS-485)

A (RS-422) - (SD) SEND DATA (A RS-485)

A’ (RS-422) - (RD) RECEIVE DATA B’ (RS-422) + (RD) RECEIVE DATA

LINE TERMINATION (RS-422)

DTR (DATA TERMINAL READY) (RS-232)

port cable

* * *

Host Device

Exact pin designations depend on

specific host device used.

6–2

Chapter 6

Communicating With a Host

RS-232 Interface

As shown in Figure 6.1 the RS-232 interface uses pins 2, 3, 4, 5 and 20 of the HOST port connector. Three of the communications lines, pins 4 (RTS), 5 (CTS), and 20 (DTR), are optional flow control lines the decoder is configured (HOST PROTOCOL configuration parameter, described in Chapter 4), these modem control lines are enabled or disabled:

Depending upon how

• RS-232: no flow control.

• RS-232 XON/XOFF: XOFF character from the host suspends

transmission and the XON character resumes the transmission. Both the XON and XOFF characters are removed from a message by the receiving device.

• RS-232 RTS/CTS-1: enables the RS-232 (RTS and CTS) control lines for

flow control.

• RS-232 RTS/CTS-2: enables the RS-232 (RTS and CTS, ) control lines

for flow control. Use this mode when the decoder is communicating with a 2760-RA or -RB communications controller using modem controls.

The following are descriptions of the three RS-232 modem control lines:

DTR (Pin #20) The Data Terminal Ready signal is sent by the decoder (RTS/CTS-1, -2) and informs the host device that the decoder is on-line

and capable of receiving data from the host. The DTR line will remain on while the decoder is on.

Note: The DTR line will be asserted (turned on) regardless of the communications interface being used.

RTS (Pin #4) The Request To Send signal is sent by the (RTS/CTS-1) decoder and informs the host device that the decoder is ready

to send data. When the host receives an RTS signal (pin #4) from the decoder, the host must assert CTS to inform the decoder to begin sending data. When the decoder stops sending an RTS, the host must stop sending a CTS before the decoder can assert the RTS again.

RTS (Pin #4) In this mode, the RTS signal (pin #4) is sent (RTS/CTS-2) by the decoder to inform the host that the decoder can accept

data. The host should only send data when RTS is asserted.

CTS (Pin#5) The Clear To Send signal is sent by the host (RTS/CTS-1,-2)device and informs the decoder that the host will accept data.

The decoder will only send data if the CTS line is on.

Refer to Figure 6.2 for an illustration of how to connect a host device to the decoder using the RS-232 interface.

6–3

Chapter 6

Communicationg With a Host

Figure 6.2 Communications With RS-232 Host Device

TD (TRANSMIT DATA)

RD (RECEIVE DA TA)

RTS (REQUEST TO SEND)

CTS (CLEAR TO SEND)

SIGNAL GROUND

7 SG

DTR (DA TA TERMINAL READY)

HOST Port on Decoder,

Data T erminal Equipment (DTE)

CHASSIS GROUND

Note: Connect shield to shell of HOST

port cable connector.

Chassis Ground

Host Device: Exact pin designations depend on specific

host device used.

CTS

RTS

DSR

RS-232 port on Host

Cable:

Use 3 wire Belden 9363, 9533, 6 wire 9536, or equivalent.

Note: Control signals CTS, RTS , and

DTR may or may or may not be required depending upon decoder configuration.

RS-422 Interface

6–4

As shown in Figure 6.1, the RS-422 interface uses pins 14 (B), 15 (A), 16 (A’), and 17 (B’). The send data and receive data lines are:

• B is the + Send Data (SD) line.

• A is the - Send Data (SD) line.

• B’ is the + Receive Data (RD) line.

• A’ is the - Receive Data (RD) line.

The send data lines carry data from the decoder to the host device. The receive data lines carry data from the host to the decoder.

No flow control lines are used in the RS-422 interface. Optional flow control is provided using XON/XOFF control which is selected by the HOST PROTOCOL configuration parameter (described in Chapter 4). There are two options:

• RS-422: no flow control.

• RS-422 XON/XOFF: XON/XOFF flow control.

The RS-422 communication lines are unterminated. You can enable a termination network (120 ohm resistor in series with a 0.01 microfarad capacitor) by connecting pins 18 and 19 together.

Chapter 6

Communicating With a Host

Note: We recommend that you terminate the RS-422 lines if excessive noise occurs on long RS-422 communication links.

Refer to Figure 6.3 for an illustration of how to connect a host device to the decoder using the RS-422 interface.

Figure 6.3 Communications With RS-422 Host Device

14 15

RS-485 Interface

CHASSIS GROUND

B RS-422 + Send Data (SD)

A RS-422 - Send Data (SD) A’ RS-422 - Receive Data (RD)

B’ RS-422 + Receive Data (RD)

RS-422 Line Termination

HOST Port on Decoder

Note: Connect shield to shell of HOST

port connector.

The RS-485 interface provides the ability to multi-drop up to 31 decoders (from each port) in a communications network using the Catalog No. 2760-RB Flexible Interface Module. As shown in Figure 6.4, the RS-485 interface uses pins 14 (+ Transmit/Receive) and 15 (- Transmit/Receive). If the decoder is on either of the ends (last drop) in a multi-drop network, you must enable the termination network (120 ohm resistor in series with a 0.01 microfarad capacitor) by connecting pins #12 and #13 together. Otherwise, leave pins #12 and #13 open.

Chassis Ground

RS-422 + Receive RS-422 - Receive RS-422 - Send

RS-422 + Send

Host Device

Exact pin designations depend on specific host device used.

Cable

Use shielded, twisted pair cables. Belden 9512 or equivalent.

Note: Only one of the devices in a multi-drop network must have the cable shield connected to chassis ground.

Refer to Figure 6.4 for an illustration of how to connect the decoder to an RS-485 network.

6–5

Chapter 6

Communicationg With a Host

Figure 6.4 Communications in an RS-485 Network

See Note #1

9 7

14 15

12 13

HOST Port on Decoder

Note #1: One and only one of the devices on the network must have the

cable shield connected to chassis ground. This is accomplished by connecting the shield to pin #1 instead of pin #9.

Note #2: The devices at each end of the network must have the line termination enabled. You enable the line termination by connecting pins #12 and #13 together. Otherwise, pins #12 and #13 are left open.

RS-485 Line Termination

SHIELD

COMMON

B RS-485 + Transmit/Receive

A RS-485 - Transmit/Receive

See Note #2

Cable: Use Belden 9842 or equivalent.

When you select the RS-485 interface during the decoder’s configuration, the following parameters are fixed:

Shield

COMMON

RS-485 + Transmit/Receive

RS-485 - Transmit/Receive

Host Device

Exact pin designations depend on specific host device used.

6–6

• 8 Data Bits

• Even Parity

• 1 Stop Bit

Note: There are four RS-485 application modes:

• RS485 PCCC-1: PCCC commands with write replies.

• RS485 PCCC-2: PCCC commands without write replies.

• RS-485 ASCII-1: ASCII commands with responses.

• RS-485 ASCII-2: ASCII command without responses.

Refer to Chapter 8 for more information.

Chapter 6

Communicating With a Host

Message Format

Bar code data is transmitted after the end of trigger or after a valid package as specified by the RESPONSE MODE you selected as part of the decoder’s configuration. Bar code data is sent as a string. Figure 6.5 illustrates the structure of the data. Table 6.A explains the contents of each field in the data string.

Note: The format of the bar code data is dependent upon the transmission parameters you entered; some of the fields shown in Figure 6.5 are optional.

Figure 6.5 Data Message Format

ASCII BAR CODE DA TA

16.

***

** *

* *

13. Delimiter

Checksum

15. End Message

14. Package Count

12. Delimiter

11. Codabar Stop Character

10. UPC/EAN Check Digit

9. Check character

8. ASCII Label Data or No-Read Message

7. Codabar Start Character

6. UPC Number System Character

5. Code Type

4. Delimiter

3. Header Message

2. Source Identification Data

1. Start Character

* This field contains characters that you program from the setup menus.

Refer to Chapter 4 for more information.

NOTE: The presence of fields 1

→5, 8, 9, and 12→16 is determined by the configuration

parameters. The presence of fields 6, 7, 10, and 11 is determined by the bar code.

6–7

Chapter 6

Communicationg With a Host

Number of

Field

Characters

in each

Explanation

Field

1. Start Character 0 or 1 Optional. ASCII character that indicates start of text or message.

2. Source Identification Data 0 to 4 Optional. Can include up to 4 alphanumeric characters.

3. Header Message 0 to 32 Optional. Any message can be put into the header. Optional. Used to indicate the beginning of label information. The

same delimiter is used in Fields 12 and 13.

4. Delimiter 0 or 1 Note: We recommend you specify a unique character not used in any of the labels or for any other function.

Optional. Indicates type of code:

01= Code 39 02= Interleaved 2-of-5 03= Codabar

5. Code Type 0 or 2

6. UPC Number System

Character

7. Codabar Start Character 1 Only appears with Codabar labels.

8. Label Data or

No-Read Indication

9. Check Character 0 or 1 Optional check character for Code 39, I 2-of-5, and Codabar.

10. UPC/EAN Check Digit 1

11. Codabar Stop Character 1 Only appears with Codabar labels.

12. Delimiter

13. Delimiter 0 or 1 Refer to field 12.

14. Package Count. 0 or 6

1 Only appears with UPC labels.

0 to 64

0 or 1

04= UPC-A 05= UPC-E 06= EAN-8 07= EAN-13 08= Code 128

Optional. Default is to transmit the label data. If a No-Read occurs, the no-read message is in this field.

Only appears with UPC-A, UPC-E (Expanded), EAN-8, and EAN-13 labels.

Optional. Used to indicate the end of a label field. If multiple labels are being read, the delimiter also indicates the start of the next label field. A double delimiter indicates the end of label information. The same delimiter is used in Field 4.

Note: We recommend you specify a unique character not used in any of the labels or for any other function.

Optional. If selected, a 6 character package counter is returned. The count resets to 000000 when:

• 999999 is reached.

• Power to the scanner is cycled.

• Counters are reset.

6–8

Number of

Field

Characters

in each

Field

15. End Message 0, 1, or 2

16. Checksum. 0, 1, or 2

Chapter 6

Communicating With a Host

Explanation

Specifies the end of message control code:

• None

• CRLF

• CR

• LF

• ETX

Message checksum. There are four options:

• None

• Longitudinal Redundancy Check (1 Byte).

• Checksum- Least significant byte first (2 Bytes).

• Checksum- Most significant byte first (2 Bytes).

Example Data Messages

To help you program your host device, we have provided the following examples. These example show the data transmitted by the decoder. In these examples, the host protocol was setup as follows:

Start Character: #

Send Source Identifier: Yes

Source Identifier: 183

Header Message: Data From Scanner 1B3

Label Delimiter: =

Send Bar Code T ype: Yes

Send Bar Code Data: Yes

No-Read Message: No-Read

Send Package Count: Yes

End of Message Character: CRLF

Transmission Check: None

Send No-Read Message: Yes

Example #1 - If one Code 39 label is decoded, the decoder would transmit the following:

#183Data From Scanner 1B3=01001122334455==000013CRLF

Where 01 is the code type (code 39), 001122334455 is the bar code data and 000013 is the package count.

Example #2 - If two Code 39 labels are scanned on a single package, the decoder would transmit the following:

#183Data From Scanner 1B3=01998877665=01001122334==000014CRLF

Where 01 is the code type (code 39), 998877665 is the data for the first bar code, 001122334 is the data for the second bar code, and 000014 is the package count.

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Chapter 6

Communicationg With a Host

Example #3 - If a No-Read occurs, the decoder would transmit the following:

#183Data From Scanner 1B3=No-Read==000015CRLF

Where 000015 is the package count.

Host Commands

Your host device can also transmit commands to the decoder. Using these commands you can request data and/or change the operating configuration of the decoder. Depending upon the type of communication interface used to communicate with the decoder, refer to the following chapter:

• If you are using the RS-232 or RS-422 interface, refer to Chapter 7.

• If you are using the RS-485 interface, refer to Chapter 8.

Note: Chapter 7 and Chapter 8 describe the format of both a host command and the decoder’s response to a command.

6–10

Chapter

Chapter Objectives

RS-232/RS-422 ASCII Command Protocol

A–B

Host Commands Using the RS or RS-422 Interface

In this chapter, we tell you how to send host commands to the decoder when you are using either the RS-422 or RS-232 communications interface. Along with each command, we also provide the format of the decoder’s response.

The commands that a host device sends to the decoder using the RS-232 or RS-422 interface consist of ASCII character strings. In response to a command, the decoder will transmit a response code (also an ASCII character string). There are two basic types of host commands:

• Single character commands

• Two character commands

The RS-485 communications interface has an application layer which can use the ASCII command protocol. Refer to Appendix E for a protocol selection chart which lists all of the protocol options.

Single Character Commands

There are four single character commands:

• Start Scan Character

• Stop Scan Character

• ACK Character

• NAK Character

The characters that are used for the single character commands are selected by you as part of the configuration of the decoder. Refer to the description of the setup screen #1 in Chapter 4.

If you specified the decode trigger to be a host command, single character commands are used to stop and start the scan:

START SCAN COMMAND - When the decoder receives the start scan command, it will begin scanning. The decoder will continue to scan until one of the ending conditions occurs.

STOP SCAN COMMAND - The stop scan command informs the decoder to stop scanning.

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Chapter 7

Host Commands Using the RS-232 or RS-422 Interface

ACK and NAK COMMANDS- If ACK/NAK communications protocol is selected as part of the communications configuration of the decoder:

1) The host device must send an ACK after every bar code data message is received correctly. If the message is not properly received, the host should send a NAK to prompt a retry.

2) If a NAK is received by the decoder, the decoder will retransmit the last message, up to three times. After the third NAK, the decoder will discard the message.

Two Character Commands

The remainder of this chapter describes the two character commands that you transmit to a decoder. Before we describe the commands, you should first understand the format of the two character commands. Two character commands have the following structure:

(1)

START

COMMAND

SEQUENCE

(2)

COMMAND

CODE

(3)

PARAMETERS

(4)

TERMINATOR

1) The start command sequence contains an escape sequence <ESC>=! where <ESC> is ASCII decimal code 27. Refer to the following table.

Character ASCII Hex

ESC 27

61 3D 33 21

Note: The start sequence is optional. The purpose of the <ESC>=! sequence is to differentiate between two character and single character commands. You must use the escape sequence if your single character commands use one of the following characters:

C D H I M N O P R S.

If your single character commands do not use any of these characters, you do not have to use the start command sequence.

7–2

2) The second part of the command is the command code.

3) The third part of the code contains the command parameters. Some commands do not have parameters.

4) The fourth part of the command code is any ASCII control code (less than decimal 32). The control code is used to terminate the command. Typical control codes are: <CR>, <LF>, <CRLF>, or <ETX>.

Chapter 7

Host Commands Using RS-232 or RS-422 Interface

Responses to Commands

After receiving a command, the decoder will send a reply. Response messages sent from the decoder to the host have the following structure:

(1)

PARAMETER

(2)

END OF

PARAMETER

CODE

(3)

(4)

RESPONSE

CODE

(5)

END OF

MESSAGE

CODE

Note: The first two parts of the response may or may not be present depending upon the command used.

1) The first part of the response is the parameter. Some commands do not return any parameters.

2) The second part of the response is the end of parameter code. This code is the same as the end of message code.

3) The third part of the response is = which is equivalent to ASCII 61.

4) The fourth part of the response is the code itself; indicating the status of the command processing (refer to Table 7.B).

Response

(Hex)

00 Command complete (normal termination)

Description

11 Valid command but format is invalid 50 Command not found 97 Reset to new configuration received 98 Reset to default configuration received

5) The last part of the response code is the end of message control code that is specified on the communications configuration screen (setup screen #1). There are four possible end of message codes: CR, CRLF, LF, ETX, or None. Refer to section titled Setup Screen #1 Data Fields (Chapter 4) for more information on how to select end of message codes.

7–3

Chapter 7

Host Commands Using the RS-232 or RS-422 Interface

Host Commands

The remainder of this chapter describes the format of the following host commands:

Reference

Letter

1 CC Set Code 39, I 2-of-5, and Codabar Check Characters 2 CM Clear Output Counter 3 CT Enable/Disable Bar Code Type 4 DD Set Configuration to Default Values 5 HC Set Host Communications 6 HM Write Header Message 7 IF Set Package Detect Input Filter and Sense 8 IM Write Source Identification Message

9 MC Read Output Counter 10 MF Set Message Format 11 MR Read Match Code T able 12 MW Write Match Code Table 13 NC Clear No-Read Count 14 NM Write No-Read Message 15 NR Read No-Read Count

Mnemonic Function

7–4

16 OC Set Output Condition and Duration 17 PC Clear Package Count 18 PR Read Package Count 19 RE Reset Decoder 20 RD Set Configuration to Default Values, Save to EEPROM,

and Restart 21 RN Save Configuration to EEPROM and Restart 22 SA Save Configuration to EEPROM (No Restart) 23 SC Set Scanner Control 24 SL Set Bar Code Specific Length

Chapter 7

Host Commands Using RS-232 or RS-422 Interface

1. Set Code 39, I 2 of 5 and Codabar Check Characters

Command: CCabcdef Function: Enables or disables decoder generated code check characters. Response: =rr<end> Comments: CC = Generate code check characters command.

a through f are the yes (1) and No (0) responses to the following parameters (in sequence shown):

a = Code 39 check character? b = Send Code 39 check character? c = I 2-of-5 check character? d = Send I 2-of-5 check character? e = Codabar check character? f = Send Codabar check character? rr = response code, refer to Table 7.B. <end> = end of message control code.

Example: Command: CC110011 Response: = 00CR

2. Clear Output Counter

Comments: 1 = Code 39 check character verified.

1 = Code 39 check character sent. 0 = I 2-of-5 check character not verified. 0 = I 2-of-5 check character not sent. 1 = Codabar check character verified. 1 = Codabar check character sent. 00 = “command complete” response code. CR = end of message control code for Carriage Return.

Command: CMn Function: Clear the output counter. Response: =rr<end> Comments: CM = Clear output counter command.

n = output counter. This value must be from 1 through 8. <end> =end of message code .rr = response code, refer to table on Page 7-3.

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Chapter 7

Host Commands Using the RS-232 or RS-422 Interface

Example: Command: CM3 Response: =00CR Comments: 3 = output counter #3

00 = “command complete” response code CR = end of message code for Carriage Return

3. Enable/Disable Bar Code Type

Command: CTfcc Function: Enables and disables the decoding of bar code types. Response: =rr <end> Comments: CT = Bar code type disable/enable command.

f = enable/disable bar code type 1- enabled 0- disabled

cc = code type 01- Code 39 02- Interleaved 2 of 5 03- Codabar 04- UPC-A 05- UPC-E 06- EAN-8 07- EAN-13 08- CODE 128

rr = response code, refer to Table 7.B.

7–6

<end> = end of message code.

Example: Command: CT103 Response =00LF Comments: 1 = enables bar code type

03 = Codabar bar code type 00 = “command complete” response code LF = end of message code for Line Feed

Chapter 7

Host Commands Using RS-232 or RS-422 Interface

4. Set Configuration to Default Values

5. Set Host Communications

Command: DD Function: Set decoder to default configuration. Response: =00CRLF Note: Host communication port parameters and the contents of the EEPROM

are not changed with this command.

Command: HCaaannnssspppfr Function: Set host communication parameters. Response: =rr<end> Comments: HC = Set host communications command.

aaa = ACK (positive acknowledgment) character. Must be ASCII decimal value from 000 to 254. A value of 255 = None.

nnn = NAK (negative acknowledgment) character. Must be ASCII decimal value from 000 to 254. A value of 255 = None.

sss = start scan character. Must be ASCII decimal value from 000 to 254. A value of 255 = None.

ppp = stop scan character. Must be ASCII decimal value from 000 to 254. A value of 255 = None.

f = large buffer enable 1 = YES 0 = NO

r = selects response mode 0 = End of Trigger 1 = After Valid Package

rr = response code, refer to table on Page 7-3. <end> = end of message control code.

Note: The ACK/NAK, start scan, and stop scan characters will not be entered into the operating system until the configuration is saved to EEPROM and the decoder is restarted (ESC = ! RN). After setting new ACK/NAK characters, the host must begin sending the new characters with each transmission.

7–7

Chapter 7

Host Commands Using the RS-232 or RS-422 Interface

Example: Command: HC03603703504311 Response: = 00CR Comments: 036 =¤ character for the ACK character.

037 =% character for the NAK character. 035 =# character for start scan character. 043 = + character for stop scan character. 1 = enables the large buffer. 1 = end of trigger response mode. 00 = “command complete” response code. CR = end of message control code for Carriage Return.

6. Write Header Message

Command: HMllstring Function: Write header message. Response: =rr<end> Comments: HM = Write header message command.

ll = length of the header message. Must be from 00 to 32. string = header message, up to 32 characters can be

specified. rr = response code, refer to Table 7.B. <end> = end of message control code.

Example: Command: HM03A-B Response: =00LF Comments: 03 = message length.

A-B = header message. 00 = “command complete” response code. LF = end of message control code for Line Feed.

7–8

Rockwell Automation 2755-DM9, 2755-DM9E User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Important User Information

Table of Contents

Chapter Objectives

Overview of this Manual

Intended Audience

Conventions Used

Warnings And Cautions

Nomenclature

Related Publications

Chapter Objectives

Features

Laser Scan Heads

Physical Description

Indicators

Communications Ports

Output Modules

Power and Scan Head Connectors

Accessories

Chapter Objectives

How the Decoder Operates

Communications

RAM and EEPROM Memory

Operating Modes

Response Modes

Chapter Objectives

Initial Programming of the Decoder

Programming Terminal Cable

Menus and Setup Screens

Start-up Procedure

Select Operation Menu

Using and Editing the Configuration (Setup) Screens

Command Bar

Setup Screen #1

Setup Screen #1 Fields

Setup Screen #2

Setup Screen #2 Fields

Programming Example

Chapter Objectives

How to Handle Excessive Noise

Grounding Recommendations

Installing the Decoder

Determining the Space Requirements

How to Connect Your Equipment

Installing and Wiring Modules

Chapter Objectives

Host Port

RS-232 Interface

RS-422 Interface

RS-485 Interface

Message Format

Example Data Messages

Host Commands

Chapter Objectives

RS-232/RS-422 ASCII Command Protocol

1. Set Code 39, I 2 of 5 and Codabar Check Characters

2. Clear Output Counter

3. Enable/Disable Bar Code Type

4. Set Configuration to Default Values

5. Set Host Communications

6. Write Header Message