TransCore IT241005422 Manual De Usuario
IT2410 Tag Programmer User Guide
D-8
Table D-4 Asynchronous Responses and Definitions
[<data>]
- data field may be of length from 0 to 1020 bytes and is associated with
each specific response. See the “Command List” on page D-10 for more information.
Serial Error Detection and Recovery for the Programmer
Rather than implementing a complex ECP, the IT2410 Tag Programmer uses a method
of error detection and recovery, which consists of a combination of CRC, sequence
numbers, a simple structured protocol with message delimiters, a message length, and
message time-outs. By using this combination of error detection and structured com-
munications protocol, a high-level of confidence is obtained without the overhead
associated with standard ECP.
of error detection and recovery, which consists of a combination of CRC, sequence
numbers, a simple structured protocol with message delimiters, a message length, and
message time-outs. By using this combination of error detection and structured com-
munications protocol, a high-level of confidence is obtained without the overhead
associated with standard ECP.
These methods are described in the following sections.
Serial Message Failures
Serial data transmission failures can occur in one the three forms:
•
Modified byte
•
Extra byte
•
Lost byte
Response
Meaning
0000H
Command complete
0001H
Command in progress
0002H
Command data invalid
0003H
Command invalid
0004H
Command aborted
3XXXH
Valid read tag data
3000H
No-tag data status code
3001H
IT2200 Read/write tag data status code
3002H
Reserved
8XXXH
Diagnostic data
8000H
Power-up diagnostic report status code
8001H
Background diagnostic report status code
8002H
Download active
AXXXH
Diagnostics statistical data