User's Manual

PIN Pad 791 Programmer’s Manual (PCI POS-A) UDN PM0103-U Rev. 06

Section 6 – Contact EMV Level 2 transaction messages 2015-04-20

Page97

Uniform Industrial Corp. Proprietary and Confidential Total 342 pages

Message T19 Send Issuer Script Command

Format: <STX>T19[IS]<ETX>[LRC]

Message length: Var.

Usage: PIN pad performs the Issuer script processing as in EMV transaction flow after

received this command from the host those are the response message when doing

online authorization. This command can be send many times if too many script

commands need to be processed, but the last one should be send before T17

command.

Message element:

Message flow:

HOST Direction PIN pad

Message T19





<ACK> (Good LRC)

<NAK> (Bad LRC)

<EOT> (after 3 NAKs)



Message T20

<ACK> (Good LRC)

<NAK> (Bad LRC)

<EOT> (after 3 NAKs)



Issuer Script Format: (see EMV 4.3, book 3, chap 10.10, Figure 14)

T L T L Script ID Commands

‘71’ or

‘72’

Including

Script ID,

tags,

lengths

‘9F18’ ‘04’ Identifier (4 bytes)

Issuer Script

Command Format

(see below)

Issuer Script Command Format: (see EMV 4.3, book 3, chap 10.10, Figure 15)

Field Length Value and description

T19 3 Message ID

IS Var. Issuer Script, format as follow. Hex string.

[LRC] 1 Checksum