Opticon MDI-4000 Series User manual

Serial Interface Manual
MDI-4000 Series
MDI-4000, MDI-4050, MDI-4100, MDI-4150
Low Profile, High-Performance, 2D Imager Engine

MDI-4000 Series Serial Interface Manual
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The information in this document is subject to change without notice.
© 2020 Opticon. All rights reserved.
This manual may not, in whole or in part, be copied, photocopied, reproduced, translated, or
converted to any electronic or machine-readable form without prior written consent from
Opticon.
Limited Warranty and Disclaimers
Please read this manual carefully before installing or using the product.
Serial Number
A serial number appears on all Opticon products. This official registration number is directly
related to the device purchased. Do not remove the serial number from your Opticon device.
Removing the serial number voids the warranty.
Warranty
Unless otherwise agreed in a written contract, all Opticon products are warranted against
defects in materials and workmanship for two years after purchase excluding batteries. Opticon
will repair or, at its option, replace products that are defective in materials or workmanship with
proper use during the warranty period. Opticon is not liable for damages caused by
modifications made by a customer. In such cases, standard repair charges will apply. If a
product is returned under warranty and no defect is found, standard repair charges will apply.
Opticon assumes no liability for any direct, indirect, consequential or incidental damages arising
out of use or inability to use both the hardware and software, even if Opticon has been informed
about the possibility of such damages.
Packaging
The packing materials are recyclable. Damage caused by improper packaging during shipment
is not covered by the warranty.
Trademarks
Trademarks used are the property of their respective owners.
Opticon Inc. and Opticon Sensors Europe B.V. are wholly owned subsidiaries of
OPTOELECTRONICS Co., Ltd., 12-17, Tsukagoshi 4-chome, Warabi-shi, Saitama, Japan 335-
0002. TEL [phone]; FAX [phone]
Support
USA
Europe
Phone: [phone]
Phone: [phone]
Email: [e-mail]
Email: [e-mail]
Web: www.opticonusa.com
Web: www.opticon.com

MDI-4000 Series Serial Interface Manual
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Revision History
Product Name: MDI-4000 Series Serial Interface Manual
Edition
Date
Page
Section
Description of Changes
2nd
February 28, 2020
-
-
Applied new template. Rewrote text for
clarity.
1st
June 11, 2018
-
-
Initial release. Supported firmware:
BD01J07

MDI-4000 Series Serial Interface Manual
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MDI-4000 Series Serial Interface Manual
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Contents
1Overview............................................................................................................................ 1
1.1 MDI-4000 Series Scan Engine Features..................................................................... 1
1.2 Integration Flow.......................................................................................................... 2
2About the MDI-4000 Series Scan Engines ......................................................................... 3
2.1 Model Details.............................................................................................................. 3
2.1.1 Standard Product Description ............................................................................. 3
2.1.2 Model Name Description..................................................................................... 4
2.2 Scan Area................................................................................................................... 4
2.3 Optional MEK-3100 Evaluation Board Accessory....................................................... 5
3Configuration...................................................................................................................... 6
3.1 How to Configure the Scan Engine with Commands................................................... 6
3.1.1 Command Packet ............................................................................................... 6
3.1.2 Sending Command Packets................................................................................ 7
3.2 Precautions for Sending Command Packets............................................................... 9
3.2.1 Factory Default Settings.....................................................................................10
3.2.2 Save Settings.....................................................................................................10
3.2.3 Custom Settings ................................................................................................11
3.3 How to Permanently Change the Factory Default Settings.........................................11
3.4 Fast Boot Mode.........................................................................................................12
3.5 Basic Commands ......................................................................................................13
3.5.1 Trigger Command..............................................................................................13
3.5.2 Diagnostic Commands.......................................................................................14
3.5.3 ACK/NAK for Serial Commands.........................................................................14
3.5.4 Reboot the Scan Engine....................................................................................14
3.5.5 Enable/Disable 2D Menu Barcodes ...................................................................15
3.5.6 Enable/Disable 1D Menu Barcodes ...................................................................15
3.5.7 Mirrored Image ..................................................................................................15
3.5.8 Reading Operation.............................................................................................17
3.5.9 Buzzer and Indicator..........................................................................................17
3.5.10 Direct Numerical Input .......................................................................................17
3.6 How to Configure the Scan Engine with a 1D Menu Barcode ....................................17
3.7 How to Configure the Scan Engine with a 2D Menu Barcode ....................................18
3.8 Forced Initialization....................................................................................................19

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4Interface............................................................................................................................19
4.1 UART ........................................................................................................................19
4.1.1 How to Switch to UART from USB .....................................................................20
4.1.2 UART Interface Signal .......................................................................................20
4.1.3 UART Basic Information.....................................................................................21
4.1.4 Baud Rate (Transfer Speed)..............................................................................21
4.1.5 Character Format...............................................................................................21
4.1.6 Handshaking (Flow Control)...............................................................................22
4.1.7 Inter Character Delay (UART)............................................................................26
4.1.8 Troubleshooting UART.......................................................................................27
4.2 USB-COM .................................................................................................................27
4.2.1 How to Switch to USB-COM ..............................................................................27
4.2.2 USB-COM Interface Signal................................................................................28
4.2.3 USB-COM Basic Information .............................................................................29
4.2.4 Integration (USB Driver).....................................................................................29
4.2.5 Connection Confirmation (USB-COM)................................................................29
4.2.6 Fixed USB-COM Port.........................................................................................30
4.2.7 Connection Method............................................................................................30
4.2.8 COM to HID Output (WIME)...............................................................................30
4.2.9 Troubleshooting USB-COM ...............................................................................31
4.3 USB-HID....................................................................................................................31
4.3.1 How to Switch to USB-HID.................................................................................32
4.3.2 USB-HID Interface Signal ..................................................................................32
4.3.3 USB-HID Basic Information................................................................................33
4.3.4 Connection Confirmation (USB-HID)..................................................................33
4.3.5 NumLock Control and CapsLock Control...........................................................34
4.3.6 Data Output Speed (USB-HID) ..........................................................................34
4.3.7 Inter Character Delay (USB-HID).......................................................................35
4.3.8 Keyboard Language...........................................................................................35
4.3.9 Troubleshooting USB-HID..................................................................................36
4.4 Data Buffer Mode Common Setting...........................................................................36
5Power Management and Timing........................................................................................37
5.1 Power Mode Transition..............................................................................................37

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5.2 Current Consumption.................................................................................................38
5.2.1 Absolute Maximum Ratings ...............................................................................38
5.2.2 Recommended Operating Conditions ................................................................38
5.2.3 Peak Current Consumption................................................................................38
5.2.4 Current Consumption of the MDI-4x00...............................................................39
5.2.5 Current Consumption of the MDI-4x50...............................................................40
5.3 Low Power.................................................................................................................41
5.3.1 Enable/Disable Low Power Mode ......................................................................41
5.3.2 Transition Time..................................................................................................41
5.3.3 USB Low Power Mode Transition Condition.......................................................42
5.3.4 USB Selective Suspend.....................................................................................42
5.3.5 USB Low Power Mode Communication Sequence.............................................42
5.4 How to Recover from Low Power Mode.....................................................................43
5.4.1 Recover from Low Power Mode by Signal (UART).............................................43
5.4.2 Recover from Low Power Mode by Command (UART)......................................45
5.4.3 Recover from Low Power Mode (USB) ..............................................................46
5.5 Power ON /OFF Timing.............................................................................................47
5.5.1 Power-On Timing...............................................................................................47
5.5.2 Power-Off Timing...............................................................................................47
5.6 Read Timing..............................................................................................................48
5.6.1 Read Time.........................................................................................................49
5.6.2 Trigger Signal Control........................................................................................49
5.6.3 Command Trigger Control..................................................................................50
5.6.4 Trigger Delay.....................................................................................................51
6Barcode Options ...............................................................................................................51
6.1 How to Set Readable Barcodes.................................................................................51
1D Barcodes .....................................................................................................................52
6.1.1 Postal Code.......................................................................................................52
6.1.2 GS1 DataBar .....................................................................................................53
6.1.3 GS1 Composite Code........................................................................................53
6.1.4 2D Barcodes......................................................................................................54
6.1.5 Other Options for Barcodes ...............................................................................54
6.1.6 OCR Barcodes...................................................................................................54

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6.2 Setting Code Common Options.................................................................................55
6.2.1 GS1 Conversion ................................................................................................55
6.2.2 Positive and Negative Image of Barcodes (1D Code Common).........................57
6.2.3 Quiet Zone (1D Code Common) ........................................................................57
6.2.4 Redundancy (1D Code Common)......................................................................58
6.2.5 Add-On Waiting Time.........................................................................................58
6.2.6 ECI Protocol Output...........................................................................................59
6.2.7 Optical Character Recognition ...........................................................................59
6.3 How to Set Code-Specific Options.............................................................................60
6.3.1 UPC...................................................................................................................60
6.3.2 EAN/JAN ...........................................................................................................63
6.3.3 Code 39 and Italian Pharmaceutical...................................................................67
6.3.4 Codabar.............................................................................................................69
6.3.5 Interleaved 2 of 5 and S-Code ...........................................................................70
6.3.6 Code 128...........................................................................................................71
6.3.7 IATA...................................................................................................................72
6.3.8 MSI/Plessey.......................................................................................................73
6.3.9 UK/Plessey........................................................................................................73
6.3.10 Telepen..............................................................................................................73
6.3.11 Code 11.............................................................................................................73
6.3.12 Korean Postal Authority .....................................................................................74
6.3.13 GS1 DataBar .....................................................................................................74
6.3.14 GS1 Composite .................................................................................................75
6.3.15 PDF417 .............................................................................................................77
6.3.16 QR Code............................................................................................................78
6.3.17 Data Matrix ........................................................................................................79
6.3.18 Aztec Code........................................................................................................80
6.4 How to Set the Number of Characters to Read..........................................................82
6.4.1 Fixed Length ON, Minimum/Maximum Length for Selected Codes ....................82
6.4.2 Command List: Fixed Length ON/Minimum/Maximum Length............................83
7Data String Options...........................................................................................................83
7.1 How to Change Uppercase and Lowercase Letters...................................................83

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7.2 How to Add Characters..............................................................................................84
7.2.1 How to Set the Prefix/Suffix ...............................................................................84
7.2.2 Prefix/Suffix Commands.....................................................................................85
7.2.3 Prefix/Suffix Value Commands...........................................................................86
8Read Options....................................................................................................................90
8.1 Read Modes..............................................................................................................90
8.1.1 Single and Multiple Read Modes........................................................................90
8.1.2 Central Reading.................................................................................................91
8.2 Manual Trigger/Trigger Repeat..................................................................................92
8.3 Auto Trigger...............................................................................................................93
8.3.1 Auto Trigger Modes ...........................................................................................93
8.3.2 Auto Trigger Sensitivity......................................................................................94
8.3.3 Double Read Reset Time...................................................................................94
8.3.4 Read Time Adjustment.......................................................................................94
8.3.5 Auto Trigger Sleep Mode...................................................................................94
8.3.6 Detection Mode..................................................................................................95
8.4 Illumination and Aiming..............................................................................................95
8.4.1 Reading LED Illumination...................................................................................95
8.4.2 External LED Illumination...................................................................................96
8.4.3 LED Aiming........................................................................................................96
8.5 Batch Reading...........................................................................................................96
9Indicator Options...............................................................................................................97
9.1 Buzzer.......................................................................................................................97
9.1.1 Buzzer Volume ..................................................................................................97
9.1.2 Good Read Buzzer ............................................................................................98
9.1.3 Startup Buzzer...................................................................................................98
9.1.4 Read Timeout Buzzer........................................................................................98
9.1.5 Intermediate Buzzer...........................................................................................99
9.1.6 Idle Level of BUZZERn pin.................................................................................99
9.2 Good Read LED........................................................................................................99
9.2.1 Good Read LED Duration..................................................................................99
9.2.2 Inverted Good Read LED.................................................................................100
9.3 Good Read Aiming..................................................................................................100
9.4 General Indicator Timing .........................................................................................100

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10 Appendix.........................................................................................................................101
10.1 Code ID Table .........................................................................................................101
10.1.1 Opticon Code ID Prefix/Suffix Value.................................................................101
10.1.2 Code Option AIM/ISO15424 Code ID Prefix/Suffix Value.................................102
10.2 MDI-4xx0 Specification Overview ............................................................................107
10.2.1 Common Specification Overview .....................................................................107
10.2.2 Technical Specifications...................................................................................108
10.2.3 MDI-4xx0 Detailed View...................................................................................112
10.3 Sample Barcodes....................................................................................................116
10.3.1 1D Barcodes....................................................................................................116
10.3.2 Postal Code.....................................................................................................119
10.3.3 GS1 DataBar ...................................................................................................121
10.3.4 GS1 Composite Code......................................................................................122
10.3.5 2D Barcodes....................................................................................................124
OCR Font (Machine Readable Travel Document)...........................................................125
OCR Font (Free OCR Edit) .............................................................................................126

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Table of Figures
Figure 1: Scan Area......................................................................................................................................4
Figure 2: Correct and Incorrect LED Aiming.................................................................................................5
Figure 3: MEK-3100 Evaluation Board .........................................................................................................6
Figure 4: MEK-3100 Evaluation Board Kit ....................................................................................................6
Figure 5: Opticon’s “Universal Config” ..........................................................................................................7
Figure 6: Precautions for Sending Command Packets.................................................................................9
Figure 7: Transition Diagram in Fast Boot Mode........................................................................................13
Figure 8: Mirrored Image Styles..................................................................................................................16
Figure 9: Mirrored Image Configurations ....................................................................................................16
Figure 10: Creating 1D Menu Barcodes with Opticon’s “UniversalConfig.”................................................18
Figure 11: Creating a 2D Menu Barcode with Opticon’s “UniversalConfig.”...............................................19
Figure 12: Data Character Transfer Format................................................................................................21
Figure 13: No Handshake...........................................................................................................................22
Figure 14: BUSY/READY............................................................................................................................23
Figure 15: RTS/CTS Data Transmission ....................................................................................................23
Figure 16: CTS, TxD Signal Timing ............................................................................................................23
Figure 17: Modem RTS/CTS Data Transmission .......................................................................................24
Figure 18: ACK/NAK Transmission.............................................................................................................25
Figure 19: ACK/NAK Flowchart ..................................................................................................................25
Figure 20: ACK/NAK No Response Flowchart............................................................................................26
Figure 21: COM to HID Output Through WIME..........................................................................................31
Figure 22: Power Mode Transition..............................................................................................................37
Figure 23: Transition Time..........................................................................................................................41
Figure 24: USB Low Power Mode Communication Sequence...................................................................43
Figure 25: Recovery Example Using TRIGn Signal....................................................................................44
Figure 26: Recovery Example Using Commands.......................................................................................45
Figure 27: Recovery Example from Low Power Mode (USB).....................................................................46
Figure 28: Power-On Timing.......................................................................................................................47
Figure 29: Power-Off Timing.......................................................................................................................48
Figure 30: Read Timing...............................................................................................................................48
Figure 31: Trigger Signal Control................................................................................................................49
Figure 32: Start from TRIGn Signal End.....................................................................................................50
Figure 33: Start from TRIGn Signal Start....................................................................................................50
Figure 34: Command Trigger Control .........................................................................................................50
Figure 35: Command Trigger Control with Effective Read Time................................................................50
Figure 36: Trigger Delay Timing .................................................................................................................51
Figure 37: GS1 Edit Feature in Opticon’s “UniversalConfig” ......................................................................56
Figure 38: Positive and Negative Barcode Images.....................................................................................57
Figure 39: Quiet Zone .................................................................................................................................57
Figure 40: Prefix/Suffix and Preamble/Postamble......................................................................................84
Figure 41: Code Coordinates......................................................................................................................89
Figure 42: Scan Time..................................................................................................................................90
Figure 43: Readable Positions in Central Reading.....................................................................................92
Figure 44: Unreadable Positions in Central Reading..................................................................................92
Figure 45: MDI-4100 and MDI-4150 Mechanical Drawing........................................................................112
Figure 46: MDI-4100 and MDI-4150 Circuit Board ...................................................................................113
Figure 47: MDI-4000 and MDI-4050 Mechanical Drawing........................................................................114
Figure 48: DBM-4000 and DBM-4050 Decoder Board.............................................................................115
Figure 49: DBM-4000 and DBM-4050 Circuit Board ................................................................................115
Figure 50: FPC Cable ...............................................................................................................................116

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MDI-4000 Series Serial Interface Manual
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1Overview
This manual provides the serial interface specifications for the MDI-4000 Series 2D scan engine,
which includes these models:
•MDI-4000 SR/HD/UD
•MDI-4050 SR/HD/UD
•MDI-4100 SR/HD/UD
•MDI-4150 SR/HD/UD
Use these specifications to smoothly integrate the MDI-4000 Series scan engine with your
product and maximize performance of the scan engine.
Unless otherwise noted, all features apply to all models.
1.1 MDI-4000 Series Scan Engine Features
The MDI-4000 Series includes a multitude of 2D scan engines to meet your needs. These low-
profile, high-performance scan engines can be integrated into any product to perform high-end
tasks.
The MDI-4000 Series contains these features:
•Super thin 2D imager scan engine: The MDI-40x0 and MDI-41x0 with a separate
decoder have ultra low-profiles: 6 mm and 9.7 mm, respectively. This minimal height
allows the scan engines to be easily integrated into even the most compact equipment,
such as PDAs, data collectors, and ticket readers.
•High-speed reading: The extreme high-performance decoder ensures stress-free
scanning and fast response, even in the case of poor-quality barcodes (such as
damaged or low-contrast), movement/vibration, and poor lighting conditions.
•High-speed image sensor: The high-speed CMOS image sensor captures images at a
speed of up to 100 fps, which when combined with the fastest global shutter speed in the
industry, enables fast and accurate scanning.
•Ultra-fast image processing: The high-performance and low-power 800MHz CPU
enables a smooth response by processing the vast amount of information transferred by
the 100fps CMOS image sensor in a very short time.
•Editing function: Captures up to 16 barcodes at a time on multiple images. The output
editing process, such as GS1 format, can also be configured easily.
•Data Edit Programming: Capable of batch reading 1D codes (up to 16 barcodes), 2D
barcodes, and OCR. The combined output is highly configurable using regular
expressions. Also supports GS1 data conversion and code coordinate output.
•Low power consumption: The power consumption in operating, standby, and low
power states has been drastically minimized. Various power saving settings can be
configured to optimize the power consumption for your particular application. The
MDI-4x50 is specifically designed to save power in Sleep low power mode, which is why
the MDI-4x50 is recommended for battery-powered devices.
•Green LED aiming and Warm-White LED Illumination: A well-defined, single line of
green LED light and efficient warm-white LED illumination makes it easy to aim the
scanner while providing safety and long life.
•RoHS compliance: The scan engines are RoHS compliant products, as declared by
Optoelectronics Co., Ltd.

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1.2 Integration Flow
To integrate the scan engine, you need to follow these steps.
1. Learn About the Scan Engines and Select a Scan Engine
Review technical information:
Communications
Reading Barcodes
•“
•About the MDI-4000 Series Scan Engines”
on page 3.
•“MDI-4xx0 Specification Overview” on
page 107.
UART/USB
2. Download Tools
Download the necessary tools from the Opticon website:
•Opticon UniversalConfig: For configuration, image acquisition, and communication.
•USB Driver: For USB-COM.
•WIME: For COM output to HID output conversion.
3. Configure and Test the Scan Engine
Evaluate the scan engine settings in your scanning environment and perform a read test:
•“Optional MEK-3100 Evaluation Board Accessory” on page 5.
•“Configuration” on page 6.
•“Interface” on page 19.
•“Power Management and Timing” on page 37.
•“Barcode Options” on page 51.
•“Data String Options” on page 83.
•“Read Options” on page 90.
•“Indicator Options” on page 97.
•“Sample Barcodes” on page 116.
4. Create Setting Menu
Create a configuration command or 2D menu barcode:
•“Configuration” on page 6.
5. Integrate the Scan Engine
See the “MDI-4xx0 Integration Guide.”

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2About the MDI-4000 Series Scan Engines
Before configuring or using the MDI-4000 Series scan engines, make sure that you are familiar
with their physical details and specifications.
2.1 Model Details
The scan engine model is a combination of the model name, focus, and interface.
Scan Engine Model Details
Model Name
Focus
Interface
MDI-4150
SR, HD, UD
B, DC, D
MDI-4050
SR, HD, UD
B, DC, D
MDI-4100
SR, HD, UD
B, DC, D
MDI-4000
SR, HD, UD
B, DC, D
Focus Description
Focus
Description
SR
Standard Range (115 mm)
HD
High-Density (65 mm)
UD
Ultra High-Density (45 mm)
Interface Description
Interface
Description
B*
UART
DC
USB-COM
D
USB-HID
* Default factory setting.
2.1.1 Standard Product Description
The standard scan engine models have these configurations. Additional configurations are
available by special order. For help, contact your Opticon Sales Representative.
The standard scan engine model configuration is a scan engine with an integrated decoder
board, Standard Range focus, and a UART interface:
•MDI-4150 SRB
•MDI-4050 SRB
•MDI-4100 SRB
•MDI-4000 SRB

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2.1.2 Model Name Description
The model name indicates the shape of the scan engine. The shape describes whether the
decoder board is separate from or mounted to the camera, as well as whether low-power
consumption mode is installed.
Model Name Descriptions
Model Name
Description
MDI-4150
Decoder board separate from camera. Low-power consumption mode installed.
MDI-4050
Decoder board mounted to camera. Low-power consumption mode installed.
MDI-4100
Decoder board separate from camera.
MDI-4000
Decoder board mounted to camera.
2.2 Scan Area
The scan engine reads a barcode by acquiring its image. The imaging area is not actually
visible. So, position the LED Aiming beam over the barcode.
Figure 1: Scan Area
For information about reading the depth of field, see “Technical Specifications” on page 108.
To configure the scan engine to only read the center of the LED Aiming beam, see “Central
Reading” on page 91.

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To scan a barcode, direct the LED Aiming beam so that it falls across the center of the barcode
label.
Note: If the barcode and the quiet zone (the blank margin on either side of the barcode) is
within the view angle, the barcode can be read from 360 degrees.
Correct LED Aiming
Incorrect LED Aiming
Figure 2: Correct and Incorrect LED Aiming
2.3 Optional MEK-3100 Evaluation Board Accessory
The MEK-3100 evaluation board can perform these tasks:
•Confirm the connection: Connects the scan engine to the host through an RS-232C or
USB interface and monitors each signal in the connection.
•Confirm communications and barcode reading: Uses a terminal emulator or the Opticon
UniversalConfig tool to confirm communications and barcode reading.
•Evaluate power consumption: Monitor power use, such as scan engine power
consumption.
The MEK-3100 evaluation board kit includes:
•MEK-3100 evaluation board
•FFC (to connect the scan engine)
•RS-232C cable
•AC adapter (for RS-232C)
•USB cable
•Hardware

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Figure 3: MEK-3100 Evaluation Board
Figure 4: MEK-3100 Evaluation Board Kit
3Configuration
This chapter explains the scan engine configuration, default setting and saving setting, and
basic commands.
3.1 How to Configure the Scan Engine with Commands
You can configure the scan engine by sending commands through the serial interface or by
reading 1D or 2D menu labels. This section describes the serial commands.
3.1.1 Command Packet
This table defines the command packet from header to terminator.
Command Header*2
Command ID*1
Command Terminator*2
<ESC>
(0x1B)
None
1 - 2 digits (ASCII)
<CR>
(0x0D)
[(0x5B)
3 digits (ASCII)
*1 Except for single digit IDs, you can send multiple command IDs between a single header and terminator.
*2 You can also send a combination of command header <STX>(0x02) and terminator <ETX>(0x03).

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Input examples:
1-digit command <ESC>Δ<CR>
2-digit command <ESC>ΔΔ<CR>
3-digit command <ESC>[ΔΔΔ<CR>
Two 4-digit commands <ESC>ΔΔΔΔ<CR>
2-digit and 3-digit command <ESC>ΔΔ[ΔΔΔ<CR>
You can send the command through Opticon’s “UniversalConfig.”For help, contact your Opticon
Sales Representative.
Note: In UniversalConfig, <ESC> is automatically sent.
Figure 5: Opticon’s “Universal Config”
3.1.2 Sending Command Packets
The maximum length of a command packet is 1000 characters. If more than 1000 characters
are sent, the scan engine may lose some characters and the command packet may not be
processed correctly.
If you send a packet that contains 32 or more characters and the baud rate is set to 460800 or
921600, the scan engine may miss part of the command. To use these baud rates, split up
commands into packets that contain less than 32 characters.

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Power Mode
(UART)
UART Baud Rate [bps]
9600
19200
38400
57600
115200
230400
460800
921600
Standby
-
-
-
-
-
-
*
*
Low Power
Standby
For more information, see “How to Recover from Low Power Mode” on page 43.
If you are sending “Null” characters, send these characters first and wait at least 10 ms to send
the command.
If a multiple command packet is sent, subsequent commands cannot be received while the
previous command is being executed. Use one of these methods to receive commands
simultaneously:
•Use a Handshake command, such as BUSY/READY or MODEM. When you use
handshaking, the RTS output is in a busy state while a command is being executed,
which makes it possible to refer to this signal for the correct timing. For more
information, see “Handshaking (Flow Control)” on page 22.
•Use ACK/NAK for serial commands. When this command is enabled, the scan engine
sends an ACK after a command is received and processed. For more information, see
“ACK/NAK for Serial Commands” on page 14.
Settings configured by commands are not retained in non-volatile memory, so these settings are
lost after a power cycle. To save settings made with commands, send the Z2 command at the
end of the command packet. When you send the Z2 command, all parameters are saved in non-
volatile memory.
Note: Settings configured by reading 1D or 2D barcodes are saved in non-volatile memory.
Previous settings configured by command are also saved. For more information, see “How to
Configure the Scan Engine with a 1D Menu Barcode” on page 17 and “How to Configure
the Scan Engine with a 2D Menu Barcode” on page 18.