User's Manual

PIN Pad 791 Programmer’s Manual (PCI POS-A) UDN PM0103-U Rev. 06
Section 7 – Contactless EMV Level 2 transaction messages 2015-04-20
Page151
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Message T77 Exception List Setup
Format: <STX>T77<SUB>[PAN][<SUB>[PAN Seq. No.]<ETX>[LRC]
Message length: Variable.
Usage: Host can use this command to send the exception pan to PIN pad. PIN pad will save
the information inside and check them when do the transaction. Once the transaction
pan is on the exception list, the transaction will be terminated. PIN pad will send the
message T78 (Exception List Setup Response) to host when it add an exception file.
Message element:
Field Length Value and description
<STX> 1 <02>
T77 3 Message ID
<SUB> 1 Separator
[PAN] up to 19 Primary Account Number with numeric format
<SUB> 1 Separator. This is optional, exist if PAN Seq. No.
exists.
[PAN Seq. No.] 2 PAN Sequence Number, this is an optional data.
<ETX> 1 <03>
[LRC] 1 Checksum
Message flow:
HOST Direction PIN pad
Message T77


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

Exception List Setup Response
Message T78
<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

Command Example:
PAN: 47 61 73 90 01 01 00 10
<STX>T77<SUB>4761739001010010<ETX><LRC>
PAN: 37 37 37 34 56 78 90 4
PAN Seq. No.: 00
<STX>T77<1A>373737345678904<1A>00<ETX><LRC>