94
Sec
tion
5
Ex
ample of
M
ulti-d
rop Conne
ct
ion
V500-R521B2/C2
User’s Manual
Section 5
Example of System Configuration
Operation flow chart
Each bar code reader reads bar codes when the trigger is input. Read data is
transmitted to the unit and stored in a buffer inside the link unit.
When the data export command (polling command) is transmitted from the upper
equipment, the link unit transmits the stored read data to the upper equipment.
Communication converter
PC/AT compatible PC
Execution of
reading
Link unit
Machine
No.
01
Machine
No.
02
Machine
No.
03
Polling
Data export of Machine
No. 1
Reading trigger
Bar code reader
Bar code reader
Link unit
Execution of
reading
Execution of
reading
Stores data
Stores data
Stores data
Polling
Data export of Machine
No. 2
Polling
Data export of Machine
No. 3
Data export
End
Returns data
Link unit
Link unit
Link unit
Returns data
Returns data
V500-R521.book 94 ページ ２００８年７月１８日 金曜日 午後１時１分
