TransCore AP4118, User Manual

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Configuring the AP4118 Rail Tag Programmer
15
Non-secure characters can be written to the tag without look-up or comparison.
Regardless of the incoming programming command format (6-bit or 4-bit), the secu-
rity characters reside in bits 106 through 117 of the actual tag ATA frame data. The
AP4118 programmer treats the security field as two 6-bit characters. For reference,
see
Table C-1 of this user guide for the entire 6-bit ASCII character set.
Generic/Non-AAR Tag Programming
Note: This information applies to programming of non-AAR-compliant tags, with the
permissions tag settings factory-programmed to support this programming mode.
In this programming mode, the programmer does not enforce all of the restrictions
described in
“AAR Tag Programming” on page 14 . This mode permits nearly unre-
stricted programming of all user data bits in the ATA/AAR frame data space in the rail
tag, excluding the security characters. This mode’s programming functions are sum-
marized here.
•
No rail tag owner lookup or matching; all associated data in the permissions tag
are ignored
•
No security character lookup or matching in this mode, only non-secure charac-
ters (see
Table C-1 of this user guide) may be programmed; ignore all associated
data in the permissions tag
AP4118 Programmer CN and Permissions Tag ID Programming
During each tag programming operation, for both ATA and non-ATA data and
addresses, the rail tag should be programmed with adequate information to allow trac-
ing of the most recent tag programming operation to a specific programmer and/or
permissions tag. Page 3 (hex address 0x18) of the rail tag is allocated for storing this
information.
Table 4 lists the page 3 layout in the rail tag.
Safeguarding the Permissions Information
Once you have configured the AP4118 tag programmer, keep the permissions tag
and/or programming certification or authorization available for future reference.
Table 4 Rail Tag Page 3 Layout
BYTE 0 1 2 3 4 5 6 7
Rail Tag Data
Address
0x18 0x19 0x1A 0x1B 0x1C 0x1D 0x1E 0x1F
Rail Tag Data
Values
Least-significant 4 bytes of the
PERMISSIONS TAG's unique ID. Programmer CN (32 bits, 4 bytes)
(DWORD)