User's Manual

PIN Pad 791 Programmer’s Manual (PCI POS-A) UDN PM0103-U Rev. 06
Section 11 – ICC / SAM / Magnetic stripe card manipulating messages 2015-04-20
Page288
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Message QC Contactless module (Not) Always Detection
Format: <STX>QC[flag]<ETX>[LRC]
Message length: Fixed 6 bytes.
Usage: If the always detection is turned on, PIN pad will return the contactless card data each
swipe under idle mode (Terminal does not have to issue message Q8/Q9 for each card
data). If this functionality is turned off, terminal should issue message Q8/Q9 to get the
contactless card data.
Note. If the card track is all disabled (refer to message QA), terminal will always get null magnetic card
data.
Message element: Request fame (HOST to PP791)
Field Length Value and description
<STX> 1 <02>
QC 2 Message ID
[flag] 1 ‘0’: Not always detect
‘1’: Always detect.
<ETX> 1 <03>
[LRC] 1 Checksum
Response fame (PP791 to HOST)
Field Length Value and description
<STX> 1 <02>
QC 2 Message ID
[status] 1 ‘0’ = Setup successfully
‘1’ = Invalid flag
<ETX> 1 <03>
[LRC] 1 Checksum
Message flow:
HOST Direction PIN pad
Message QC


<ACK> (Good LRC) / <NAK> (Bad LRC)
<EOT> (after 3 NAKs)

Message QB(response)
<ACK> / <NAK> /
<EOT>
