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Command Descriptions
2-226
Device NAK
(ALL)
Descriptions
Device non-acknowledgement
Device NAK message is used to guarantee the reliability of packet transfers for commands that
have no natural response, such as Action Commands, Set commands. On receiving a bad
command, the scanner will send a Device NAK message to issue a command error including
Opcode error, LRC check digit error and so on. Device NAK may not be disabled.
Packet Format
Prefix
Opcode Status
Length
Parameter(s)
LRC Suffix
7Eh
0Eh 00h XXh
00h 00h 00h
<Null> 0E 7Eh
1 Byte
3 Bytes 1 Byte 2 Bytes
0 Byte 1 Byte 1 Byte
. Host Requirements
On receiving a bad command, it takes the device about 1 second to clear out the command buffer. So
you are NOT supposed to send other commands during this period of time after receiving the Device
NAK message. Since Device NAK is a device-to-host message, there is no response for this message.
. Opcode Field
The third byte of the Opcode varies according to the error code. It is reserved.
. Parameter(s) Field
Device NAK message takes no parameters, so the Parameter(s) field is null.
. Length
Total size (bytes) of the Parameter(s) field
. LRC
”Opcode” XOR “Status” XOR “Length” XOR “Parameter(s)”
- Serial Command Manual 1
- Revision History 2
- Warranty 3
- Table of Contents 4
- Corded Series 5
- BT Scanner Series 5
- Wi-Fi Scanner Series 5
- Tether Scanner Series 6
- Scan Engine Series 6
- Fixed-mount Scanner Series 6
- Bluetooth Scanner Series 6
- WiFi Scanner Series 6
- About This Guide 7
- Chapter 1 Command Overview 8
- 1.1 Command Briefing 9
- （Continued） 10
- 1.2 Command Structure 11
- Escape Sequence 12
- Parameter Format 13
- Command Overview 14
- 2.1 Communication 17
- Get Connected MAC 17
- Reply Connected MAC 18
- Get Paired MAC 19
- Reply Paired MAC 20
- Select By MAC 21
- Deselect By MAC 22
- Select By ID 23
- Deselect By ID 24
- 2.2 Data 25
- Decode Data 25
- Transmit Record 26
- 2.3 Image 27
- Enter Capture Image Mode 27
- Exit Capture Image Mode 28
- Capture Image Ready Notify 29
- Get Capture Image Data 30
- 2.4 Action 32
- LED Indicator 32
- Beeping 33
- Serial Trigger 34
- Store Configuration 35
- Factory Default 36
- Master Default 37
- Security Check 38
- BT Operation Mode 39
- BT A Operation Mode 40
- BT Synchronize 41
- FS Test Mode 42
- FS Operation Mode 43
- FS A Operation Mode 44
- SE Operation Mode 45
- TS Operation Mode 46
- TS A Operation Mode 47
- Remote Indication 49
- Remote Message 51
- Remote Clear 54
- Remote Lock 55
- Remote Unlock 58
- Remote Programming 59
- Remote Programming Extension 60
- Sync Date Time 63
- Delete Record 64
- Send STerm Data 65
- 2.5 Interface 66
- Set RS232 72
- Get RS232 74
- Reply RS232 76
- Set Bluetooth 90
- Get Bluetooth 93
- Reply Bluetooth 95
- Set USB HID 98
- Get USB HID 100
- Parameter(s) 101
- Reply USB HID 102
- Set USB COM 104
- Get USB COM 106
- Reply USB COM 108
- Set Wi-Fi 110
- Get Wi-Fi 112
- Reply Wi-Fi 114
- 2.6 Operation 116
- Set TS Operation 116
- . Notes 118
- Get TS Operation 122
- Reply TS Operation 124
- Set SE Operation 130
- Command Descriptions 133
- Get SE Operation 134
- Reply SE Operation 136
- Set FS Operation 140
- Get FS Operation 145
- Reply FS Operation 147
- Set BT Operation 152
- . Warning 154
- Get BT Operation 158
- Reply BT Operation 160
- Set WF Operation 166
- Get WF Operation 169
- Reply WF Operation 171
- Set WF System 174
- Get WF System 176
- Reply WF System 178
- Set WF Scanning 180
- Get WF Scanning 183
- Reply WF Scanning 185
- 2.7 Transmission 188
- Set Transmission 188
- Get Transmission 191
- Reply Transmission 193
- 2.8 Symbology 204
- Set Symbology 204
- Get Symbology 217
- Reply Symbology 221
- 2.9 Device Info 234
- Get Device Info 234
- Reply Device Info 236
- Get Record Count 238
- Reply Record Count 239
- 2.10 Acknowledgement 240
- Device ACK 240
- Device NAK 241
- Host ACK 242
- Host NAK 243
- Host ACK Extension 244
- Host NAK Extension 247
- Chapter 3 Customer Support 250
- CINO GROUP 251
- PC WORTH INT’L CO., LTD 251
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