User's Manual

PIN Pad 791 Programmer’s Manual (PCI POS-A) UDN PM0103-U Rev. 06
Section 13 – JPEG File Operation messages 2015-04-20
Page314
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Message J8 Enable/Disable Idle Logo Functionality
Format: <STX>J8[Op]<ETX>[LRC] (request frame)
<STX>J8[Result]<ETX>[LRC] (response frame)
Message length: Fixed 6 byte.
Usage: This message is used to enable/disable idle logo functionality. When it is enabled, idle
logo and date/time will not be displayed. In order to successfully enable idle logo
functionality, there should be a JPEG file that is assigned as idle logo.
Message element:
Request frame (HOST to PIN pad)
Field Length Value and description
<STX> 1 <02>
J8 2 Message ID
[Op] 1 0 : Disable
1 : Enable
<ETX> 1 <03>
[LRC] 1 Checksum
Response frame (PIN pad to HOST)
Field Length Value and description
<STX> 1 <02>
J8 2 Message ID
[Result] 1 '0' = Setup successfully.
'1' = Invalid Op parameter.
‘2’ = Fail to setup (No Jpeg file is assigned)
<ETX> 1 <03>
[LRC] 1 Checksum
Message flow:
HOST Direction PIN Pad
Message J8


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)
Message J8 (response)
<ACK> (Good echo)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)
