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Using the Auto Communications Option
EXE
Command code
Command
Command
Area
parameters
Command data
Update counter
response
READY
BUSY
NORM
ERR
Response
Area
Update counter
Error code
Response information
Response data
Communications field
1.
The command code, command parameters, and command data are set from the PLC while the READY sig-
nal is ON. The value of the update counter response is matched with the value of the Update counter in the
V780 response area.
2.
The user (PLC) turns ON the EXE signal. This tells the Reader/Writer to start execution.
3.
When the Reader/Writer receives the instruction to start execution, it turns OFF the READY signal and turns
ON the BUSY signal.
4.
When the Reader/Writer detects an RF Tag and communications end normally, it sets the error code,
response information, and response data, adds 1 (increments) to the update counter value, and then turns
ON the NORM signal and turns OFF the BUSY signal.
5.
The user (PLC) detects a change in the update counter, confirms that the NORM signal has turned ON, and
acquires the response data. After the acquisition of data, the user (PLC) updates the update counter
response value in accordance with the value of the Update counter in the V780 response area, and turns
OFF the EXE signal. This tells the Reader/Writer to stop execution.
6.
When the Reader/Writer receives the instruction to stop execution, it turns ON the READY signal and turns
OFF the NORM signal.
7.
If the BUSY signal is ON and the user (PLC) wants to cancel Auto communications, the user (PLC) turns
OFF the EXE signal. This tells the Reader/Writer to stop execution.
8.
When the Reader/Writer receives the instruction to stop execution, it turns ON the READY signal and turns
OFF the BUSY signal.
UHF RFID System V780-series Reader/Writer User's Manual (EtherNet/IP
0000 hex
0001 hex
0000 hex
0001 hex
RF Tag
RF Tag C
1 2 3
4
5
6
7 Ethernet/IP Communications
0000 hex
0000 hex
TM
) (Z402)
7
8
7
7 - 77
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