42
Sec
tion
3
Oper
ation
Flow Cha
rt
V500-R521B2/C2
User’s Manual
Section 3
Function Explanation
Communication timing chart
This section explains the indication timing of the buzzer and LED indication.
In case when reading OK (single reading)
*1
You can change the setting for the trigger input logic.
p.53
Time
Description
T0
Trigger ON time. (When effective duration is designated, consider it as effective duration.)
T1
Chattering prevention time. (5 ms)
T2
Buzzer and indication LED illumination time. (Initial value: 200 ms, changing allowed)
T3
Trigger signal minimum OFF time. Be sure to set 30 ms or more.
T4
Communication time. Differs according to communication condition.
• In case of continuous reading and plural reading, laser is always radiating during trigger input is ON
(or during reading effective duration). Concept of T0 to T4 other than this is the same as the case of
single reading.
• A rough guide of reading time
As this bar code reader is approx. 500 decode/sec., decode process time for once is 2 ms. In case
of plural time conformance, "2 ms x (conformance time + 1)". However, it differs according to the
reading bar code condition (dirt or thin spot, etc.)
• Concept of communication time
Trigger
input (*1)
Laser
radiation
Reading
operation
Buzzer,
LED
Communi-
cation
Reading
Communication
time (ms) =
(Data length) + (1: In case when parity exists) + (Number of stop bit)
(Communication speed)
(Number of digit of transmission data +
Number of header char
Number of footer characters) x 10
3
x
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