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
Page279
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Message Q3Ignore Card Swipe
Format: <STX>Q3<ETX>[LRC]
Message length: Fixed 5 bytes.
Usage: The HOST should send a message Q3 after receiving card data and decide not to
accept another card temporarily. Upon receiving this message, the PIN pad will display
“PIN PAD PROCESSING” prompts and ignore any card swiping.
Message element:
Field Length Value and description
<STX> 1 <02>
Q3 2 Message ID
<ETX> 1 <03>
[LRC] 1 Checksum
Message flow:
HOST Direction PIN pad
Message Q3


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)
“PIN PAD PROCESSING”
displayed on LCD