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
Page294
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Message B1 Font Size Selection
Format: <STX>B1[Font Size]<ETX>[LRC] (request)
<STX>B2[Response]<ETX>[LRC] (response)
Message length: Fixed 6.
Usage: PIN pad supports 4 font sizes, 8x8, 8x16, 16x16 and 16x24. Use this message can
change the displayed font size. If the font size is set to 8x8, only the low page
characters can be displayed (<0x80), the high page characters will be replaced by
space character.
Request frame (HOST to PP791)
Field Length Value and description
<STX> 1 <02>
B1 2 Message ID
[Font Size] 1 '0': 8x8 font size
'1': 8x16 font size
'2': 16x16 font size
'3': 16x24 font size
<ETX> 1 <03>
[LRC] 1 Checksum
Response frame (PP791 to HOST)
Field Length Value and description
<STX> 1 <02>
B2 2 Message ID
[Response] 1 '0': Setup successfully.
'1': Format error
'2': Not support
<ETX> 1 <03>
[LRC] 1 Checksum
Message flow:
HOST Direction PP791
Message B1 (Request)


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)
Message B2 (response)
<ACK> (Good echo)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)
