Opticon MDI-4000 Series, Руководство по последовательному интерфейсу, Страница: 103 / 139

MDI-4000 Series Serial Interface Manual
91
Scan time output format:
Tms
where:
•
T is flexible length.
•
ms is maximum string length, which is 4.
Figure 42: Scan Time
8 Read Options
You can configure read options, such as read modes, trigger settings, illumination and aiming,
batch reading, and data editing.
8.1 Read Modes
Barcode reading starts when the trigger signal (TRIGn) is pulled low, when the trigger command
(“Z”) is received, or when an object is detected and the scan engine is in auto trigger mode.
8.1.1 Single and Multiple Read Modes
You can configure single read and multiple read modes for the scan engine.
Read Mode Commands
Read Mode Command Description Default
Single Read S0 Single read in a single trigger press.
✓
Multiple Read 1 [D3P Multiple reads in a single trigger press: the
scan engine saves the data in memory and
does not read the same data.
Multiple Read 2 S1 Multiple reads in a single trigger press: the
scan engine reads the same data.
Single Read Mode
In single read mode, the scan engine starts reading after a trigger press and continues reading
until a barcode is successfully decoded or until the read time expires. For more information, see
“Central Reading” on page 91
.
Multiple Read Mode 1 (Does Not Read the Same Data)
In this multiple read mode, the scan engine starts reading after a trigger press and keeps
reading (even after a barcode is successfully decoded) until the read time expires. To prevent a
TxD
Data
TRIGn
RxD
“ Z ” Command
or
Scan Time