User's Manual

PIN Pad 791 Programmer’s Manual (PCI POS-A) UDN PM0103-U Rev. 06
Section 5 – Administration and maintenance messages 2015-04-20
Page61
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Message 1J Turn ON/OFF LCD Backlight
Format: <SI>1J[option]<SO>[LRC]
Message length: Fixed 6 bytes.
Usage: This message can control the global backlight ON or OFF for the LCD of PP791 with
backlight option. By default, PP791 will turn on its LCD backlight when it receives PIN
entry or clear text entry message such as 70 or Z50, and turn it off when those
functions exits. With message “1J1”, the PP791 will keep LCD backlight turned ON
until “1J0” is issued.
Message element:
Request frame (HOST to PIN Pad)
Field Length Value and description
<SI> 1 <0F>
1J 2 Message ID
[option] 1 ASCII character
‘0’: Turn off LCD backlight
‘1’: Turn on LCD backlight
<SO> 1 <0E>
[LRC] 1 Checksum
Response frame (PIN Pad to HOST)
Field Length Value and description
<SI> 1 <0F>
1J 2 Message ID
[status] 1 ASCII character
‘0’: Turn off LCD backlight
‘1’: Turn on LCD backlight
<SO> 1 <0E>
[LRC] 1 Checksum