Operating Modes
21
Operating Modes
On Line
In this operating mode, the reading phase is defined as the time between the Phase ON and Phase OFF events. The
Phase events can be signals coming from one or two external presence sensors connected to the scanner inputs or
serial start/stop strings sent from the host over the serial interface.
Reading Phase
See the Operating Mode Reference Table for details about conditions when using this operating mode.
ACK/NAK Protocol
When checked this parameter enables the ACK/NAK Protocol which is available only in On Line operating mode.
When ACK/NAK Protocol is enabled, Serial Start/Stop Strings and Motor ON/OFF Strings cannot contain ACK/NAK
characters.
On Line Options
The On Line mode can be activated by choosing one of the following options:
Selections:
On Line 1 Input
:
the reading phase takes place during the active phase of the presence sensor,
when the scanner tries to acquire and correctly decode the code. If the operation
is successful, the barcode characters are transmitted on the serial interface in the
format defined by the current configuration and the right output event is risen at
the end of the PS active phase. If a code cannot be decoded, a no read message
is sent and the no read event is risen at the end of the PS active phase.
On Line 2 Inputs
:
the reading phase is defined by 2 inputs. It starts when the Start Input is
activated and stops when the Stop Input is deactivated (unless the Extended
Phase is enabled). If the operation is successful, the barcode characters are
transmitted in the format defined during the configuration phase on the
interface(s) enabled and the right output event is risen. If a code cannot be
decoded, a no read event is risen.
Serial On Line
:
In Serial-On-Line mode the reading phase starts when the Serial Start String is
received on the serial interface and ends when the Serial Stop String is received
or when a programmed Reading Phase Timeout expires.
If decoding is correct, the data is transmitted on the serial port as defined by the
configuration. The output line selected for the right output event is risen and the
relative message is transmitted on the serial interface.
In case of a wrong read, a no read message is transmitted on the serial interface.
The output line selected for the no read event is risen and the relative message is
transmitted on the serial interface.
Extended Phase
Available only for the "On Line 2 Inputs" option, if checked, it allows the Stop Input to end the reading phase only if
the Start Input is also deactivated.
Start Input Number
It defines the number of the input starting the reading phase.
Selections: from
1
to
2
