5-1
Section
Read Operation in AUTO Mode
63
Explanation
Normal operation
When errors occur
(1) When the INHIBIT input turns ON (i.e., is set to “1”) at
the host device, the Amplifier becomes ready for a Data
Carrier (i.e., goes into a Data Carrier wait state). The initial
status is for the data outputs to be all “0.”
(2) The Amplifier begins to access a Data Carrier and read
data from it when a Data Carrier enters the transmission
area. The data outputs are cleared to “0” and the LED
indicators are turned OFF.
(3) When the read processing is completed, the Data
Carrier’s data is output to the data output lines and the
NORMAL output turns ON (i.e., is set to “1”). The data
indicators also light.
(4) The data outputs and the NORMAL output are retained
while the Data Carrier is in the transmission area.
(5) The data outputs and the NORMAL output are cleared
to “0” as soon as the Data Carrier goes out of the
transmission area. If the Data Carrier goes out of the
transmission area before the time set by the output mode
elapses, the data outputs and the NORMAL output will be
cleared to “0” after the time set by the output mode
elapses.
(6) The data LED indicators remain lit until the next Data
Carrier enters the transmission area.
(7) If processing continues with the Data Carrier still in the
transmission area (e.g., if the next data is read), turn the
INHIBIT input OFF at the host device. (Leave the INHIBIT
input OFF until the HS output turns ON.) This will clear the
outputs and turn OFF the LED indicators. When the
INHIBIT input is subsequently turned ON (i.e., cleared) the
Data Carrier will again be detected and read processing
will be executed.
Normally, an error occurs in AUTO mode when the Data
Carrier is traveling so fast that the Data Carrier moves out
of the transmission area even though the Sensor is still
accessing the Data Carrier.
(1) When an error occurs, the error classification is output
to the data output lines and the ERROR output signal
turns ON. The error classification is also shown by the
data LED indicators flashing red.
(2) The data outputs and the ERROR output are retained
while the Data Carrier is in the transmission area.
(3) The data outputs and the ERROR output are cleared to
“0” as soon as the Data Carrier goes out of the
transmission area. If the Data Carrier goes out of the
transmission area faster than the time set by the output
mode, the data outputs and the ERROR output will be
cleared to “0” after the time set by the output mode
elapses.
(4) The data LED indicators remain lit until the next Data
Carrier enters the transmission area.
(5) If processing (such as retries) continues with the Data
Carrier still in the transmission area, turn the INHIBIT input
OFF at the host device. (Leave the INHIBIT input OFF
until the HS output turns ON.) This will clear the outputs
and turn OFF the LED indicators. When the INHIBIT input
is subsequently turned ON (i.e., cleared) the Data Carrier
will again be detected and read processing will be
executed.