User's Manual

PIN Pad 791 Programmer’s Manual (PCI POS-A) UDN PM0103-U Rev. 06
Section 9 – Online transaction messages with Master / Session keys 2015-04-20
Page205
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Message flow:
HOST Direction PIN pad
Message 70/Z60/Z62


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

Message 71 or <EOT> when
input tined out or user pressed
[CAN]
<ACK> (Good echo)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

Display processing prompt
Error codes:
Code Meaning
'0' Null Account input field.
'1' Key value error.
(session key value conflicted with the usage of active master key, or
session key length longer than active master key)
'2' Account number shorter than 8 digits.
'3' Account number longer than 19 digits.
'4' Account number have character other than '0'-'9'.
'5' Working key format error.
'6' Timeout value error
'7' No more DES operation within 60 min. (see Appendix A)
'8' From 70, Amount string format error.
From Z62, PIN count, Accept Null PIN flag, and Prompt string
format error.
'9' Active master key not exist.
'A' Currently selected master key over range (Master key slot A to F
will cause this error message because they are supposed to do
authentication and MAC, not for PIN entry)
'B' Flash memory read/write error
'C' Memory buffer allocation error
'E' Data length error in a field.
'G' Specified file not found or authentication error.