Mitsubishi Electric Melsensor CF37-SR Settings Manual page 60

Delay Mode
After First Read: A delay occurs after the first code is read; therefore, a timer is not reset.
This means, in a trigger mode which handles multiple images by reading codes continuously, a code is read repeatedly when
the code is kept in front of the code reader for an interval longer than 'Re-read delay.'
♦
After First Read
♦
When the set value of 'Re-read delay' is longer than
the trigger interval
Trigger
interval
Interval of 2000 ms
Read
Re-read delay
2100ms
Reading is not performed
because a trigger is generated
during the re-read delay.
After Last Read: A timer is reset every time when the code reader detects a code.
The code is not read again even if the code is kept in front of the code reader.
♦ After Last Read
Trigger
interval
Read
Re-read delay
2100ms
Re-read delay
after resetting the
timer
2100ms
8 Application Steps
58
8.3 Application Details
Reading is performed because
the duration of the re-read
delay ends.
Interval of 2000 ms
♦
When the set value of 'Re-read delay' is shorter
than the trigger interval
Trigger
interval
Interval of 2000 ms
Read
Re-read delay
500ms
Re-read delay is reset every
time when a code is detected
within the field of vision.
Reading is performed
because the duration of
the re-read delay ends.