Sabre 1555 RFID & Bar Code Reader Programmer’s Reference Manual
4-16
PPP Frame Type
This section details the various frame types used in communicating with the 1555.
<TYPE> Definitions
The <TYPE> field indicates the frame type (setup command, binary message, high-
level acknowledge, and other parameters). A message consists of one or more frames.
Table 4-13 describes bits b7 through b0.
Table 4-13 <TYPE> Bit, Value, and Description
In Table 4-14 (frames 1 and 2), the message sent to the host is a Binary Frame
Response (BFR) type, where message data = 357 bytes and MFS = 229.
Bit
Value
Description
b7
0
Always set to 0 for <TYPE> commands
b6
0
Always set to 0 for <TYPE> commands
b5 - b0
[1 - 63]
This value indicates the frame type
Table 4-14 Binary Frame Data Examples
Frame 1
STX
<Type> (e.g., BFR)
Size 1
Size 2
Data
CHK
ETX
0x7F
0xC1 (bit 6 set to 1)
0x1
0x85
Byte 1
through
byte 233
(CHK)
0x7F
Frame 2
STX
<Type> (e.g., BFR)
Data
CHK
ETX
0x7F
0x81 (bit 6 set to 0)
byte 224 -
byte 357
(CHK)
0x7F
Содержание Sabre 1555
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