User's Manual

PIN Pad 791 Programmer’s Manual (PCI POS-A) UDN PM0103-U Rev. 06
Section 9 – Online transaction messages with Master / Session keys 2015-04-20
Page207
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Message Z0 Move Display Cursor
Format: <STX>Z0[YY]<ETX>[LRC]
Message length: Fixed 7 bytes.
Usage: Move the display cursor. Z0 message is enabled when PIN pad receives first Z2
message. Under Z2-authenticated mode, Z0 message is also disabled.
Message element:
Field Length Value and description
<STX> 1 <02>
Z0 2 Message ID
[YY] 2 Y-coordinate, 01 ~ Max. line
<ETX> 1 <03>
[LRC] 1 Checksum
Message flow:
HOST Direction PIN pad
Message Z2


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)
Display string.
Message Z0


<ACK> / <NAK> /
<EOT>
PIN pad moves cursor
Message Z2
(without clear
screen)


<ACK> / <NAK> /
<EOT>
Display 2
nd
string from
the coordinate specified
by Z0.