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
Page281
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Message Q5Set MSR Retry Count
Format: <STX>Q5[RetryCount]<ETX>[LRC]
Message length: Fixed 6 bytes.
Usage: This command will set a retry count for the MSR swiping initiated by message Q1 and
Z90.
If PIN pad cannot decode any data from latest swipe, retry count larger than “0”, and
timeout is not reached, PIN pad will show “BAD READ” on LCD and waiting for next
swipe. Until timeout or retry counter reached maximum. This setting will be kept in
battery powered memory and effective all the time.
Message element:
Field Length Value and description
<STX> 1 <02>
Q5 2 Message ID
RetryCnt 1 ‘0’ to ‘9’, MSR retry count.
<ETX> 1 <03>
[LRC] 1 Checksum
Message flow:
HOST Direction PIN Pad
Message Q5


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)
Save the setting or display
error message when
RetryCnt out of range.