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Chapter 3 64 Bit And 96 Bit EPC Data Formats
74
IMPORTANT
When any of these three parameters are inconsistent then
confusion is likely.
The following tables (Table 5 on page 74 for PGL and Table 6 on
page 75 for ZGL) identify the consequences of mismatched criteria.
Table 5. PGL EPC Format Handling
EPC Format
(based on
header)
Selected
Tag Data
Length
Size of Data
Request (from
program)
Result Comment
64 bit 64 bit < 64 bit OK Pad 0s to left for 64 bit
64 bit 64 bit = 64 bit OK As is
64 bit 64 bit > 64 bit Error Data too long
64 bit 96 bit < 64 bit Read 96 bit Pad 0s to left for 96 bit
64 bit 96 bit = 64 bit Read 96 bit Pad 0s to left for 96 bit
64 bit 96 bit 64 bit <> 96 bit Read 96 bit Pad 0s to left for 96 bit
64 bit 96 bit = 96 bit Error EPC incompatible with
length
64 bit 96 bit > 96 bit Error Data too long
96 bit 64 bit < 64 bit Error EPC incompatible with
length
96 bit 64 bit = 64 bit Error EPC incompatible with
length
96 bit 64 bit > 64 bit Error Data too long
96 bit 96 bit < 96 bit OK Pad 0s to left for 96 bit
96 bit 96 bit = 96 bit OK As is
96 bit 96 bit > 96 bit Error Data too long