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
Page284
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Message Q8Display TAP CARD message
Format: <STX>Q8<ETX>[LRC]
Message length: Fixed 5 bytes.
Usage: The PIN pad will display the prompt “TAP CARD” on its LCD until a contactless card is
taped or Z1 message (reset state) received or CAN key pressed.
After contactless card taped, PIN pad will collect card data then send the data to the
HOST.
NOTE: Before issue message Q8 to retrieve contactless card data after PIN pad
re-power on, issue QA message to enable contactless module’s tracks.
Message element:
Field Length Value and description
<STX> 1 <02>
Q8 2 Message ID
<ETX> 1 <03>
[LRC] 1 Checksum
Message flow:
HOST Direction PIN pad
Message Q8

“TAP CARD” displayed on
LCD

<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

(User taps contactless card)
Message 83
<ACK> (Good LRC)
<NAK> (Bad LRC)
