75
RFID System
Operation Manual
Se
ct
io
n 5
Mo
veme
nt of
Da
ta
Car
rie
rs an
d Co
m
m
a
nd Sta
tus
Section 5
Communications
Using the AUTO READ and AUTO WRITE Commands
The READ and WRITE commands are normally used when Data Carriers are stopped.
The Auto Commands are normally used when Data Carriers are moving.
●
READ or WRITE Command
●
AUTO READ or AUTO WRITE Command
●
Command Application Examples.
Read/Write Head
Data Carrier
Stopped
• A much wider communica-
tions area can be used to
ensure dependable communi-
cations in comparison with
moving Data Carriers.
Read/Write Head
Data Carrier
Moving
• When using Auto Commands,
the approach of Data Carriers
is automatically detected.
• If the Data Carriers are moving
slowly enough and positioning
is dependable enough, then
there are few restrictions on
the communications distance.
Item
Application method
Description
Precautions
Sending com-
mands using
a timer
The next Auto Command is
sent after receiving a
response.
• This method is applicable when
Data Carriers pass through the
communications area of the
Read/Write Head at fixed inter-
vals.
• It can also be used when a long
time elapses before next Data
Carrier arrives.
• Repeating the same communi-
cation with the same Data Car-
rier can be prevented if the
waiting time during which the
Data Carrier leaves the commu-
nications area elapses after the
end of the communication.
• Transportation speed
must be kept constant.
• This method is valid only
for systems where com-
munications are not per-
formed more than once
with same Data Carrier.
Trigger
The next Auto Command is
sent when a trigger is
received after a response is
returned.
• For example, an Auto Com-
mand is transmitted after end of
processing for the previous pro-
cess has been confirmed.
• The trigger must be input before
the next Data Carrier
approaches.
• Trigger processing is
necessary.
Read/Write Head
Data Carrier
Read/Write Head
Data Carrier
Data Carrier
Trigger
Summary of Contents for V600 Series
Page 50: ...48 Section 2 Wiring RFID System Operation Manual Section 2 Installation and Wiring MEMO ...
Page 72: ...70 Section 4 Write Command Memory RFID System Operation Manual Section 4 Function ...
Page 138: ...136 Section 5 End Codes RFID System Operation Manual Section 5 Communications MEMO ...