9560 Transaction Manager User's Manual - Intermec

5
Using the Keypad 4-11
Function Key Layout 4-12
Contents
Data Communications and Operating Options
Introduction to Data Communications 5-3
Data Communications in a Data Collection System 5-3
The ISO Data Communications Model 5-3
Physical Layer 5-4
Data Link Layer 5-4
Full-Duplex Protocols Versus Half-Duplex Protocols 5-5
Full-Duplex Devices Versus Half-Duplex Devices 5-5
The DLE Character and XON/XOFF Flow Control 5-5
Working With Protocols 5-6
Point-to-Point Protocol 5-6
Polling Mode D Protocol 5-7
Multi-drop Protocol 5-7
User-Defined and User-Defined Multi-drop Protocols 5-8
Tips for Defining Secure Protocols 5-8
Buffering Received Data 5-9
Communication Delays 5-9
Data Format Requirements 5-10
SOM Character (Start of Message) 5-10
Preambles and Postambles 5-10
EOR Characters (End of Record) 5-11
EOF Characters (End of File) 5-11
Record 5-11
Records per Block 5-11
EOM Characters (End of Message) 5-12
Error Checking 5-12
Displaying Data on the 9560 5-12
Types of Data Displayed 5-12
Display Settings and Formatting 5-13
Buffered Display 5-13
Transparent Display 5-13
Formatting the Display 5-13
Display Overflow 5-14
Displaying ASCII Control Codes 5-15
Displaying Data on a Terminal 5-15
Buffered Terminal Operation 5-16
Transparent Terminal Operation 5-17
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