User's Manual

PIN Pad 791 Programmer’s Manual (PCI POS-A) UDN PM0103-U Rev. 06
Section 12 –Display functionality messages 2015-04-20
Page295
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Message B3 Font Color (Foreground / Backgroud) Selection
Format: <STX>B3[Foreground][Background]<ETX>[LRC] (request)
<STX>B4[Response]<ETX>[LRC] (response)
Message length: Fixed 17 bytes.
Usage: Use this message to set new color of font and background. The format is RR/GG/BB.
Request frame (HOST to PP791)
Field Length Value and description
<STX> 1 <02>
B3 2 Message ID
[Foreground] 6 Hex String. Format: RRGGBB
[Background] 6 Hex String. Format: RRGGBB
<ETX> 1 <03>
[LRC] 1 Checksum
Response frame (PP791 to HOST)
Field Length Value and description
<STX> 1 <02>
B4 2 Message ID
[Response] 1 '0': Setup successfully.
'1': Format error
<ETX> 1 <03>
[LRC] 1 Checksum
Message flow:
HOST Direction PP791
Message B3 (Request)


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)
Message B4 (response)
<ACK> (Good echo)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)
