User's Manual Part 3
Table Of Contents
- Page 1
- Page 2
- Page 3
- Page 4
- Page 5
- Page 6
- Page 7
- Page 8
- Page 9
- Page 10
- Page 11
- Page 12
- Page 13
- Page 14
- Page 15
- Page 16
- Page 17
- Page 18
- Page 19
- Page 20
- Page 21
- Page 22
- Page 23
- Page 24
- Page 25
- Page 26
- Page 27
- Page 28
- Page 29
- Page 30
- Page 31
- Page 32
- Page 33
- Page 34
- Page 35
- Page 36
- Page 37
- Page 38
- Page 39
- Page 40
- Page 41
- Page 42
- Page 43
- Page 44
- Page 45
- Page 46
- Page 47
- Page 48
- Page 49
- Page 50
- Page 51
- Page 52
Hi-G-Tek Ltd. Microelectronics & Asset Tracking Technology
126
6
RS 485/232 Communication Protocol
6.4.2.3. Reader Messages Packed Data Format
Where:
PK
P#
Ch
The first byte is the total number of packets in
the string.
The second byte is the packet serial number.
The third byte is the channel number from which
the message is received.
Maximum total message length is 128 bytes.
Maximum Data* length is 115 bytes.
6.4.2.3.1. Packed Data from the LSC.
6.4.2.3.2. Packed Data from the READER.
When the packets originate with the LSC, each packet will be
transmitted after an appropriate response from the READER.
The LSC may retransmit the last packet upon receipt of a
response indicating that the last packet was not received
satisfactorily.
When the packets originate with the READER, each packet will be
transmitted after an appropriate acknowledgement from the LSC.
The READER may retransmit the last packet upon receipt of an
acknowledgment indicating that the packet was not received
satisfactorily