Omron V600 Series User Manual

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Section 5 Movement of Data Carriers and Command Status
RFID System
Operation Manual
Section 5
Communications
Polling
This section describes command processing when two Read/Write Heads are connected to one ID
Controller. For normal Auto Commands, the ID Controller does not return a response until the Data
Carrier approaches the specified Read/Write Head. This means that the communications path with the
host device remains in the Busy Status, and the host device cannot send commands to the ID Control-
ler's other Read/Write Head.
However, Polling Auto Commands enable the ID Controller to return a response when requested by the
host device. Thus, the Busy Status of the communications path to the host device is cleared and the
host device can send commands to the ID Controller's other Read/Write Head.
1. A Polling Auto Command is sent to Head 1.
2. The ID Controller receives the command and
returns a response indicating that it has
received the command.
3. A Polling Auto Command is sent to Head 2.
4. The ID Controller receives the command and
returns a response indicating that it has
received the command.
5. The host device can check the status of
processing or end polling auto processing
using subcommands.
6. When a Data Carrier is not close to the
specified Read/Write Head, a “no Data Carrier”
response is returned in response to a check
subcommand.
7. When a Data Carrier passes by the Read/Write
Head, data is read or written.
8. Once processing has been completed, the ID
Controller sends a response to the host device
indicating that the processing indicated by the
check subcommand has been completed.
Host device ID Controller Data Carrier
Polling Auto
Command
Head 1
Head 2
Polling Auto
Command
Subcommand
Polling head 1 check
Polling head 2 check
Subcommand
Subcommand
Response
Polling head 1 check
Response
Response
Response
Head 1
Head 2
Not approaching Head 1
Not approaching Head 2
Read or write
processing
Head 1
Response
Head 1 processing
completed
Not approaching
Not approaching
Not approaching
Not approaching
Data Carrier
Passing

Omron V600 Series Specifications

General

Operating Frequency	13.56 MHz
Supported Standards	ISO 15693, ISO 18000-3
Read Range	Up to 70 mm (depending on tag and environment)
Power Supply	24 VDC ±10%
Operating Temperature	-10 to 55°C (with no icing or condensation)
Humidity	35% to 85% (non-condensing)
Communication Interface	RS-232C