4 - Command Set
DynaPro Go| Handheld PIN Pad Device with MSR/Contact/Contactless | Programmer’s Manual (COMMANDS)
Page 126 of 247 (
D998200136-31
)
requirement can be bypassed by the merchant by setting bit 0, byte 6 of the 0xA2 command. The
TVR bits will be set appropriately per EMV 4.x requirements. The PIN requirement can also be
bypassed by the cardholder.
Figure 4-24 - DynaPro Go EMV Application Selection
10)
After PIN entry, the device displays either
PIN OK
or cycles through
INCORRECT PIN
and
TRY
AGAIN
up to the PIN retry limit (similar to the screenshots in
). If the number of attempts reaches PIN try limit-1, the device displays
Last PIN Try
briefly
before returning to
TRY AGAIN
. If the cardholder exceeds the PIN entry retry limit, the device
performs
, otherwise the transaction proceeds to the approval stage.
Figure 4-25 – DynaPro Go Last PIN Try Screen
11)
The device determines the appropriate transaction approval method per
EMV 4.x
requirements. A
transaction can be forced online by the merchant by setting the
Options
in the invocation of
Command 0xA2 to
Force Online
.
a)
For offline transactions, the device gets the TC or AAC from the chip for later transmission to the
host. Depending on the transaction outcome, the device shows
APPROVED
,
DECLINED
, or
ERROR
(similar to the screenshots in
Command 0x07 - Display Message
) and performs
b)
For online transactions, the device does the following:
i)
If the host started the transaction with Quick Chip Mode in effect:
