SSI Interface
6 - 3
SSI Transactions
General Data Transactions
ACK/NAK Handshaking
If you enable ACK/NAK handshaking, all packeted messages must have a CMD_ACK or CMD_NAK response,
unless the command description states otherwise. This parameter is enabled by default. Motorola recommends
leaving this handshaking enabled to provide feedback to the host. Raw decode data and WAKEUP do not use
ACK/NAK handshaking since they are not packeted data.
Following is an example of a problem which can occur if you disable ACK/NAK handshaking:
•
The host sends a PARAM_SEND message to the decoder to change the baud rate from 9600 to 19200.
•
The decoder cannot interpret the message.
•
The decoder does not implement the change the host requested.
•
The host assumes that the parameter change occurred and acts accordingly.
•
Communication is lost because the change did not occur on both sides.
If you enable ACK/NAK handshaking, the following occurs:
•
The host sends a PARAM_SEND message.
•
The decoder cannot interpret the message.
•
The decoder CMD_NAKs the message.
•
The host resends the message.
•
The decoder receives the message successfully, responds with CMD_ACK, and implements parameter
changes.
Содержание Symbol PL4507
Страница 1: ...Symbol PL4507 Decoder Integration Guide ...
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Страница 3: ...Symbol PL4507 Decoder Integration Guide 72E 116649 02 Revision A April 2009 ...
Страница 6: ...iv Symbol PL4500 Decoder Integration Guide ...
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Страница 20: ...xviii Symbol PL4507 Decoder Integration Guide ...
Страница 35: ...Installation 2 7 Figure 2 4 Symbol PL4507 Supply Current 5 V Operation USB Self Powered Scan Decode Session ...
Страница 40: ...2 12 Symbol PL4507 Decoder Integration Guide ...
Страница 43: ...Accessories 3 3 Figure 3 2 Symbol SE4500 to PL4507 21 Pin Flex p n 15 113896 01 ...
Страница 44: ...3 4 Symbol PL4507 Decoder Integration Guide Figure 3 3 Symbol PL4507 30 Pin Host Connector p n 50 12171 030 ...
Страница 45: ...Accessories 3 5 Figure 3 4 Symbol PL4507 30 Pin Mating Host Connector p n 50 12167 030 ...
Страница 70: ...4 24 Symbol PL4507 Decoder Integration Guide ...
Страница 122: ...6 20 Symbol PL4507 Decoder Integration Guide ...
Страница 128: ...7 6 Symbol PL4507 Decoder Integration Guide Serial Host Types continued OPOS JPOS Fujitsu Serial ...
Страница 130: ...7 8 Symbol PL4507 Decoder Integration Guide Baud Rate continued Baud Rate 460 800 Baud Rate 921 600 ...
Страница 136: ...7 14 Symbol PL4507 Decoder Integration Guide Software Handshaking continued None ACK NAK ENQ ACK NAK with ENQ XON XOFF ...
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Страница 256: ...9 88 Symbol PL4507 Decoder Integration Guide ...
Страница 264: ...10 8 Symbol PL4507 Decoder Integration Guide ...
Страница 277: ...Advanced Data Formatting 11 13 Code Types continued MSI GS1 128 UPC E1 Bookland EAN Trioptic Code 39 Code 11 Code 32 ...
Страница 289: ...Advanced Data Formatting 11 25 Numeric Keypad continued 7 8 9 Cancel ...
Страница 317: ...Advanced Data Formatting 11 53 Keyboard Characters continued Send Send Send Send Send Send Send ...
Страница 318: ...11 54 Symbol PL4507 Decoder Integration Guide Keyboard Characters continued Send Send Send Send Send Send 0 Send 1 ...
Страница 319: ...Advanced Data Formatting 11 55 Keyboard Characters continued Send 2 Send 3 Send 4 Send 5 Send 6 Send 7 Send 8 ...
Страница 320: ...11 56 Symbol PL4507 Decoder Integration Guide Keyboard Characters continued Send 9 Send Send Send Send Send Send ...
Страница 321: ...Advanced Data Formatting 11 57 Keyboard Characters continued Send Send A Send B Send C Send D Send E Send F ...
Страница 323: ...Advanced Data Formatting 11 59 Keyboard Characters continued Send N Send O Send P Send Q Send R Send S Send T ...
Страница 325: ...Advanced Data Formatting 11 61 Keyboard Characters continued Send Send Send Send _ Send Send a Send b ...
Страница 327: ...Advanced Data Formatting 11 63 Keyboard Characters continued Send j Send k Send l Send m Send n Send o Send p ...
Страница 329: ...Advanced Data Formatting 11 65 Keyboard Characters continued Send x Send y Send z Send Send Send Send ...
Страница 334: ...11 70 Symbol PL4507 Decoder Integration Guide Send ALT Characters continued Send Alt Send Alt ...
Страница 355: ...Advanced Data Formatting 11 91 Alphanumeric Keyboard Space Single Close Quote Dash ...
Страница 356: ...11 92 Symbol PL4507 Decoder Integration Guide Alphanumeric Keyboard continued Comma Single Open Quote ...
Страница 357: ...Advanced Data Formatting 11 93 Alphanumeric Keyboard continued ...
Страница 358: ...11 94 Symbol PL4507 Decoder Integration Guide Alphanumeric Keyboard continued _ Underscore ...
Страница 360: ...11 96 Symbol PL4507 Decoder Integration Guide Alphanumeric Keyboard continued 6 7 8 9 A B C ...
Страница 361: ...Advanced Data Formatting 11 97 Alphanumeric Keyboard continued D E F G H I J ...
Страница 362: ...11 98 Symbol PL4507 Decoder Integration Guide Alphanumeric Keyboard continued K L M N O P Q ...
Страница 363: ...Advanced Data Formatting 11 99 Alphanumeric Keyboard continued R S T U V W X ...
Страница 364: ...11 100 Symbol PL4507 Decoder Integration Guide Alphanumeric Keyboard continued Y Z Cancel End of Message a b c ...
Страница 365: ...Advanced Data Formatting 11 101 Alphanumeric Keyboard continued d e f g h i j ...
Страница 366: ...11 102 Symbol PL4507 Decoder Integration Guide Alphanumeric Keyboard continued k l m n o p q ...
Страница 367: ...Advanced Data Formatting 11 103 Alphanumeric Keyboard continued r s t u v w x ...
Страница 368: ...11 104 Symbol PL4507 Decoder Integration Guide Alphanumeric Keyboard continued y z ...
Страница 380: ...A 12 Symbol PL4507 Decoder Integration Guide ...
Страница 387: ...Appendix C Sample Bar Codes Code 39 UPC EAN UPC A 100 EAN 13 100 123ABC 0 12345 67890 5 3 456789 012340 ...
Страница 389: ...Sample Bar Codes C 3 Data Matrix Maxicode ...
Страница 390: ...C 4 Symbol PL4507 Decoder Integration Guide ...
Страница 393: ...Numeric Bar Codes D 3 Cancel To correct an error or change a selection scan the bar code below Cancel ...
Страница 394: ...D 4 Symbol PL4507 Decoder Integration Guide ...
Страница 414: ...Glossary 8 Symbol PL4507 Decoder Integration Guide ...
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