User's Manual

PIN Pad 791 Programmer’s Manual (PCI POS-A) UDN PM0103-U Rev. 06
Section 5 – Administration and maintenance messages 2015-04-20
Page30
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Response fame – Error message (HOST to PP791)
Field Length Value and description
<SI> 1 <0F>
02 2 Message ID
? 1
[Err msg] 1 ‘2’: Key duplicate.
‘3’: Internal fail: fail to allocate memory
‘4’: Internal fail: fail to read key structure
‘7’: Fail to decrypt key value.
‘A’: TR31 format error.
‘B’: Insecure key inject. (New key is longer than
the key used to protect it.)
‘C’: Fail to verify MAC value.
‘D’: KLK does not exist / The selected key (KLK)
is not with usage “K0”
‘E’: Incompatible key usage.
‘F’: Key loading count over limit.
<SO> 1 <0E>
[LRC] 1 Checksum
Message flow:
HOST Direction PIN Pad
Message 02 (request frame)


<ACK> /<NAK>/<EOT>

Processing request.
If format error, send <EOT> and end.
Message 02 (echo of request frame).
Verify echo frame.
If verify ok, send <ACK>.
If packet LRC error, send
<NAK>.
If host want to cancel key
loading procedure, send
<EOT>.


Save key value and send <EOT>