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

Page209

Uniform Industrial Corp. Proprietary and Confidential Total 342 pages

Message Z2 Display String

Format: <STX>Z2[string]<ETX>[LRC] (Request frame, normal)

<STX>Z2<GS>[PromptID]<ETX>[LRC]

(Request frame, authenticated)

<STX>Z2<RS>[PromptID]<ETX>[LRC]

(Request frame, authenticated for PIN entry)

<STX>Z2[status]<ETX>[LRC]

(Response frame, authenticated)

Message length: Variable, at least 6 bytes.

Usage: PIN pad to show the indicated prompt string on its display, until [CAN] key is pressed.

If the first character of message is <GS> (0x1D) or <RS> (0x1E), PIN pad will treat

following message string as ID number, and search its predefined message table for

corresponding message string, then display the string on the screen.

Note: 1. Two Z2 message with authenticated prompt ID can be issued in serial to form a

longer sentence, or used in combination with normal string which contains only digits.

2. Z2 message with PIN entry prompt will force user issue every message with ,

which implies the PIN entry message can’t be concatenated.

3. PIN pad will temporarily turn off timer display for the first Z2 message it received.

After Z42, Z50, Z60 are performed, [CAN] key is pressed, or any other message

received and processed, PIN pad will turn on the timer display.

Message element:

Z2 request frame (normal mode)

Field Length Value and description

Z2 2 Message ID

1 <1A> (optional)

When exists, PIN pad will clear

screen contents.

[string] 1 .. 64 ASCII string to be displayed

[LRC] 1 Checksum