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Table below lists all possible error codes:
04
Illegal (invalid) command (command code or data is wrong)
06
Record number is out of range (requested record doesn't exist)
07
Command failed (hardware problem or invalid internal data)
Summarized below are all supported commands. Command characters are
found in the "CC" column, their corresponding ASCII codes- in "Hex". "CS" lists
commands that require the checksum in the command packet ("C") or reply
packet ("R"). "Error code" column lists errors that may result from each
command execution:
C.
Hex
C.
'D'
44H
'I'
49H
'Y'
59H
'S'
53H
'T'
54H
'V'
56H
'R'
52H
'C'
43H
'B'
42H
'N'
4EH
'G'
47H
'E'
45H
'M'
4DH
'Z'
5AH
Note 1. D-command never returns error message even if the data supplied in the
command packet is incorrect. Invalid command packet makes it impossible to determine
which terminal is being addressed and, therefore, which one should reply with an error code.
Note 2. Z-command is never replied to.
Follows is the detailed command description. Command and reply packets
are shown without STX, Checksum and CR characters.
TR515 User's Manual
Description
Select designated terminal
Set new machine number
Get machine number
Set date/time
Get date/time
Get firmware version
Initialize the terminal
Set register (see next table)
Get register (see next table)
Get number of records
Get specified record
Initialize the database
Prepare for database recovery
Perform self-test**
9
CS
Errors
C R 4
6
7
Note 1
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Note 2
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