User's Manual

PIN Pad 791 Programmer’s Manual (PCI POS-A) UDN PM0103-U Rev. 06
Section 10 – Online transaction messages with DUKPT 2015-04-20
Page240
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Message flow:
HOST Direction PIN pad
Message Z2 or Z3


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)
Show Prompt Messages
Message 60


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

(User enter PIN and press ENTER)
Message 71
<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

Display “PIN PAD PROCESSING”
until CLEAR pressed or another
message received.
Message 62


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

(User confirm the amount)
Message 63
<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)
